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Keysight Agilent HP 86260A Datasheet

1. LEV EL Fully clockwise ALC GAIN EE Fully clockwise Press 8620A START pushbutton Adjust ALC GAIN and POWER LEVEL controls for highest power meter indication A ith UNLEVELED light not lit If oscillations appear on trace adjust ALC GAIN and POWER LEVEL controls counterclockwise as necessary to obtain a leveled trace The power meter should indicate gt 7 dBm less the approximate 0 5 dB loss through the directional coupler Press 8620A CW pushbutton Adjust oscilloscope trace to bottom of display and note trace position Decrease output power indication by 0 2 dB by adjusting POWER LEVEL control Note position of oscilloscope trace The area between the two positions noted represents leveling tolerance of 0 11 dB Press 8620A START pushbutton Adjust POWER LEVEL control fully clockwise then counterclockwise until UNLEVELED lamp goes out at maximum leveled power Adjust position of oscilloscope trace vertically so that it is displayed between upper and lower specification limits noted in step d The highest and lowest portion of the sweep trace must be within 0 2 peak to peak limit noted External Leveling With Power Meter g Connect equipment as shown in Figure 4 6 with crystal detector connected at oscilloscope VERT INPUT 4 8 86260 Performance Tests PERFORMANCE TESTS 4 10 POWER LEVEL AND VARIATION Cont d SWEEP OSCILLAT
2. 22 Storage and Shipment 2 2 IMANUAL 7 1 2 20 Environment 2 7 1 2 22 Deleted Manual Change Instructions 7 1 2 23 2 24 Delet d 0 0 00 8 1 n RE T 8 1 DPERATION stp niin Seiten cause 3 1 GEGEN 8 1 3 1 3 1 8 5 Rem yt 8 1 3 3 PanelFeatures L 3 1 8 1 Operator s 3 1 8 1 3 8 Operating Instructions 3 1 re cttw itso A 3 10 External Crystal Detector Leveling 3 1 8 2 External Power Meter Leveling CEPI 3 14 External 3 1 uu lode dites 8 2 3 16 External 3 2 trm m LEIDEN E 8 2 3 18 Phase lock Operation 3 2 8 261 8 2 3 20 Frequency Reference 3 2 8 3 FM Norm PL Switch L 3 2 Operator
3. 15 2 GHz 1 KHz SQ WV OFF Rear Panel sse OFF RF BLANKING OFF Rear OFF 86260A OFF POWER LEVEL e tinte Fully clockwise gumuejdl NORM b Press 8620A LINE switch to ON Press 8620A CW pushbutton Allow equipment to warm up for a minimum of 30 minutes d Center RF output signal on spectrum analyzer Verify that fundamental of the oscillator is displayed by signal identification procedure Set spectrum analyzer BANDWIDTH to 10 kHz SCAN WIDTH PER DIVISION to 10 kHz while keeping signal centered on CRT display f On spectrum analyzer select 10 dB LOG display and adjust LINEAR SENSITIVITY vernier control for a full eight division display 4 5 Performance Tests Model 86260A PERFORMANCE TESTS 4 9 RESIDUAL FM IN 10 KHZ BANDWIDTH Cont d 9 Set SCAN TIME PER DIVISION to 20 msec set SCAN MODE to SINGLE sweep h Push SINGLE sweep pushbutton five times at approximately one second intervals and store resultant traces on screen i The trace should be similar to The FM deviation measured across top of travce should be less than 50 kHz 5 divisions PEAK TO PEAK RESIOUAL FM II 1 2 iai Figure 4 4 Residual FM Disposable on Spectrum Analyzer 4 10 P
4. e mm 1 APPENDIX B COMPONENTS OF END ITEM LIST Not APPENDIX C ADDITIONAL AUTHORIZATION LIST Not APPENDIX D MAINTENANCE 0000000 0 0 01000008010000 Section 0 1 Maintenance Allocation Chart for RF Plug in 0 86260 55 dls tind D 3 m Tools and Test Equipment Requirements for RF Plug in HP Model 86260 0 4 Remarks Not Applicable 2 inti tiui gene A eoe eden Coa eR ERE eu nr ve APPENDIX E EXPENDABLE SUPPLIES AND MATERIALS Not Applicable 86260 Figure LL m l B B BIA ee A ILLUSTRATIONS Page Figure Model 86260A RF Plug in 5 2 and Accessories Supplied 1 0 Serial Number Plate 1 2 YIG Oscillator Warranty 1 4 Service Accessories for the 86260A Front Panel Controls Connectors and Indicator 3 3 Rear Panel Connectors and Controls 3 4 Operator s Check Unleveled RF Power Output L Leveled RF Power Oscillations with ALC G
5. A2Q16 1854 0071 TRANSISTOR NPN SI PD 300MW FT 200MHZ 28480 1854 0071 A2Q17 1855 0081 TaNSISTOR J FET 2N5245 N CHAN D MODE SI 01295 2N5245 A2R1 0757 0442 7 RESISTOR 10K 1 125W F TC 0 100 24546 4 1 8 1002 A2R2 0757 0465 3 RESISTOR 100K 1 125W F TC 0 100 24546 C4 1 8 TO 1003 F A2R3 0757 0438 8 RESISTOR 5 11 1 125W TC 0 100 24506 4 1 8 5111 A2R4 0698 3160 4 RESISTOR 31 6K 1 125W TC 0 100 16299 4 1 8 3162 A2R5 0698 3160 RESISTOR 31 6K 1 125W F TC 0 100 16299 C4 1 8 TO 3162 F A2R6 0698 3156 2 RESISTOR 14 7K 1 125W F TC 0 100 16299 4 1 8 1472 A2R7 0683 2265 3 RESISTOR 22M 5 25W FC TC 900 1200 01121 CB2265 A2R8 0683 2265 5 RESISTOR 22M 5 25W FC TC 900 1200 01121 CB2265 A2R9 0757 0290 8 RESISTOR 1K 1 125W F TC 0 100 24546 4 1 8 1001 A2R10 0757 0442 RESISTOR 10K 1 125W F TC 0 100 24546 4 1 8 1002 A2R11 0757 0442 RESISTOR 10K 1 125W 0 100 24546 C4 1 8 TO 1002 F A2R12 0757 0438 RESISTOR 5 11K 1 125W F TC 0 100 24546 4 1 8 5111 A2R13 0757 0460 2 RESISTOR 61 9K 1 125W F TC 0 100 24546 4 1 8 6192 A2R14 0757 0438 RESISTOR 5 11K 1 125W F TC 0 100 24546 C4 1 8 TO 5111 F A2R15 0698 3160 RESISTOR 31 6K 1 125W F TC 0 100 16299 4 1 8 3162 A2R16 0757 0442 RESISTOR 10K 1 125W F TC 0 100 24546 4 1 8 1002 A2R17 2103 2517 1 RESISTOP TRMR 50K 10 C SIDE ADJ I TURN 30983 ET50X503 A2R18 0683 2265 RESISTOR 22M 5
6. a maintenance procedure See Figure 8 7 11 6625 2917 148 14 86260 Operation FRONT PANEL FEATURES ICE Y 1 OUTPUT RF ON OFF switch 51 RF power off GAIN control R2 Adjusts output of ALC amplifier Resets oscillator bias voltage when turned to off then when using external leveling on ALC switch S2 Selects MTR power meter or EXT 2 UNLEVELED light DS1 Lights when not external power leveling modes In OFF position RF automatic leveling mode or when in a leveling mode is not leveled and RF output is not level across the band RF OUTPUT Connector J2 Type N 50 Ohm RF POWER LEVEL control R1 Adjusts RF power connector output Drawer Latching Handle Aids in installing and EXT INPUT connector J3 Input for external removing RF Plug in After installing handle locks to leveling from crystal detector or power meter hold RF Plug in in place Figure 3 1 Front Panel Controls Connectors and Indicator 3 3 11 6625 2917 14 amp 14 86260 REAR PANEL FEATURES a S Interface Connector P2 Provides interconnection between 8620A B mainframe and 86260A RF Plug in RF OUTPUT Connector J2 Option 004 only Type 50 ohm RF connector FM NORM PL switch S3 Operates in conjunction with FM input connector It switches components in oscillator drive circuits for optimum perfor mance in normal sweep NORM f
7. 11 6625 2917 148 14 TECHNICAL MANUAL OPERATOR S ORGANIZATIONAL DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL INCLUDING REPAIR PARTS AND SPECIAL TOOLS LISTS FOR RF PLUG IN HP MODEL 86260A HEADQUARTERS DEPARTMENT OF THE ARMY 18 MARCH 1981 11 6625 2917 148 14 SAFETY STEPS TO FOLLOW IF SOMEONE IS THE VICTIM OF ELECTRICAL SHOCK DO TRY TO PULL OR GRAB THE INDIVIDUAL IF POSSIBLE TURN OFF THE ELECTRICAL POWER IF YOU CANNOT TURN OFF THE ELECTRICAL POWER PULL PUSH OR LIFT THE PERSON TO SAFETY USING A DRY WOODEN POLE OR A DRY ROPE OR SOME OTHER INSULATING MATERIAL SEND FOR HELP AS SOON AS POSSIBLE AFTER THE INJURED PERSON IS FREE OF CONTACT WITH THE SOURCE OF ELECTRICAL SHOCK MOVE THE PERSON A SHORT DISTANCE AWAY AND IMMEDIATELY START ARTIFICIAL RESUSCITATION 11 6625 2917 148 14 WARNING Voltages are present in this instrument when energized which can cause death on con tact With the ac power cable connected the ac line voltage 115 or 230 Vac is present at the terminals of the mainframe power line assembly FLI mounted on rear panel and at the mainframe POWER switch whether the POWER switch is on or off With top cover removed these terminals are exposed and carry ac voltages capable of causing death Do not attempt internal service or adjustment unless another person capable of rendering first aid and resuscitation is present Deenergize the instrument before
8. 7 7 86260 86260 CHANGE 2 Cont d With INT mode selected 20 is applied to A2CR9 and A2CRI5 This develops approximately 19V at the cathodes The 19V at CR15 cathode reverse biases A2CR4 and A2CR12 With CR4 OFF the Slope control A2R17 is activated and with CR12 OFF the internal leveling switch A2Q7 is turned ON to close the ALC loop When the ALC switch S2 is in either the OFF EXT or MTR positions 10V forward biases A2CR4 and A2CR12 to disable both the Slope circuit and Q7 switch Slope and Internal Gain Adjustments The Slope adjust A2R17 and INT Gain A2R58 operate only in INT mode These controls are inoperative in the standard 86260A since the INT Mode is disconnected 6 5 Table 6 2 Change A1U2 Number to 1826 0261 Page 8 13 Figure 8 14 Change A1U2 Part Number to 1826 0261 NOTE The 1826 0261 is a high reliability replacement for the 1826 0013 CHANGE 4 Page 1 0 Figure 1 1 Delete scale for 8620B 86260 00009 This scale is no longer supplied with the instrument Paragraph 1 37 Change to read One scale is supplied with the 86260A for use with the 8620A and 8620C mainframes This scale has HP Part Number 86260 00008 See Figure 1 Page 6 7 Table 6 2 Delete 86260 00009 entry 5 Page 6 7 Table 6 2 Change A3R17 to HP NumberO757 1000 R FXD FLM 51 1 OHM 1 1 2W Page 8 17 8 18 Fiqure 8 18 SERVICE SHEET 3 Change
9. __ 2 ALC BOARD ON EXTENDER SWEEP RF OSCILLATOR PLUG IN RF OUTPUT CRYSTAL DETECTOR Figure 9 3 Internal Leveling Slope and Gain Adjustments Test Setup EQUIPMENT Sweep 8620 PAP Sn 86260 Option 001 1 TETTE 8491 010 8470 Option 012 180 1801 1820 15 Contact Extender Board HP 5060 0049 Extender Gable 08620 60032 PROCEDURE Slope Control Adjustment a RF Plug in from mainframe and install extender cable Remove A2 ALC board and install 15 contact extender board See Figure 1 2 b equipment as shown in Figure 9 3 With O dB attenuator and crystal detector connected directly to RF OUTPUT c controls as follows 8620A MODE riti duin dudo dud AUTO 1 to 01 TIME SECONDS Fully clockwise m RF BLANKING 1 S WV O 1 KHz SQ WV Model 86260A Option 001 PERFORMANCE TESTS 5 16 INTERNAL LEVELING SLOPE AND GAIN ADJUSTMENTS Option 001 Cont d 86260A MEME loa PS INT ALG GAIN E Fully clockwise d Press 8620A LINE pushbutton e Set oscilloscope for external sweep and apply sweep
10. 8520 MAINFRAME 86260A Tp BM H ec 6 Ku i 1 GNDHI f vili V i 1 1 aw ign GR E s ift 8 17 8 18 OMA Figure 8 18 FM Assembly Schematic CHASSIS 1 442 01 04 R20 CIRCUIT BOARD VIEW 5 6000 eee 12345678 9101112 131415 000000000000000 000000000000000 ABCDEFHJKLMNPRS YIG DRIVER 64 6 K LOFREQ FM AJTPS AIRI A2TP2 AITPS GRD gt 28 wA um M M RS es hs pmi 431 432 42 40 OFFSET ADJ a AIRS BIAS LIMIT 2 1 7 es D 4 XS AIRY BIAS 3 A186 AITPI 2 1 ATTPS LEVEL GRO GRO Figure 8 19 Adjustments and Test Points Location 8 19 8 20 Figure 8 20 Major Assemblies Location Top View Figure 8 21 Major Assemblies Location Bottom View Service Model 86260A Option 001 SECTION IX OPTIONS OPTION 001 INTERNAL LEVELING 9 1 INTRODUCTION 9 2 This section describes the differences in the Model 86260A RF Plug i
11. STANDARD TOP VIEW TO XA2 PINS 913 929 XA2 PIN F 4 TO 2 PINS 905 2 20V 6 and 14 M AW FRONT PANEL ALC SWITCH S2 OPTION 001 TOP VIEW TO XA2 PINS 6 AND 14 913 TO XA2 PINS 4 AND R TO XA2 PIN TO XA2 PIN F 20V FRONT PANEL Figure 2 ALC Switch S2 Contact Detail and Wiring Diagram Errata 7 11 86260 90012 86260 C3 8 2 R1 10K 04 1820 0223 432 431 014 1855 0081 CR11 Figure 3 P O Figure 7 2 ALC A 4ssembly Schematic Errata 7 12 86260 Service SECTION VIII SERVICE 8 1 INTRODUCTION 8 10 When magnetic field is applied the dipoles align themselves parallel to it Figure 8 2 This 8 2 This section provides instructions for produces net magnetization vector Figure 8 3 troubleshooting and repA1Ring the Model 86290ARF Plug in This information includes timing diagrams troubleshooting block diagrams and a troubleshooting chart Circuit descriptions and simplified block diagrams are included with the schematic diagrams of the assemblies Exploded views and component location illustrations are contained in this section to add visual information for servicing and repairing provides a block diagrarn and functional description of the 86290A Schematic presentations in this manual show electrical circuit operation and are
12. 25W FC TC 900 1200 01121 CB2265 A2R19 0698 3156 RESISTOR 14 7K 1 125W F TC 0 100 16299 4 1 8 1472 A2R20 0757 0438 RESISTOR 5 11K 1 125W F TC 0 100 24546 C4 1 8 TO 5111 F A2R21 0757 0280 RESISTOR 1K 1 125W F TC 0 100 24546 4 1 8 1001 A2R22 0757 0280 RESISTOR 1K 1 125W F TC 0 100 24546 4 1 8 1001 A2R23 0757 0280 RESISTOR 1K 1 125W F TC 0 100 24546 4 1 8 1001 A2R24 0757 0401 1 RESISTOR 100 1 125W TC 0 100 24546 4 1 8 101 A2R25 0757 0280 RESISTOR 1K 1 125W F TC 0 100 24546 4 1 8 1001 A2R26 0757 0199 2 RESISTOR 21 5K 1 125W F TC 0 100 42546 4 1 8 2152 A2R27 0757 0280 RESISTOR 1K 1 125w 0 100 24546 4 1 8 1001 A2R28 0757 0438 RESISTOR 5 11K 1 125W F TC 0 100 24546 4 1 8 5111 A2R29 2100 3162 1 RESISTOR TRMR 200K 10 C SIDE ADJ 32991 3006 1 204 A2R30 0698 3160 RESISTOR 31 6K 1 125W F TC 0 100 16299 C4 1 8 TO 3162 F A2R31 0757 0442 RESISTOR 10K 1 125W TC 0 100 24546 C4 1 8 TO 1002 F A2R32 0698 3454 5 RESISTOR 215K 196 125W 0 100 16299 C4 1 8 TO 2153 F A2R36 0695 3454 RESISTOR 10K 1 125W TC 0 100 16299 C4 1 8 TO 2153 F A2R37 0757 0442 RESISTOR 215K 196 125W 0 100 24546 C4 1 8 TO 1002 F A2R38 0698 3150 1 RESISTOR 2 37K 196 125W 0 100 16299 C4 1 8 TO 2371 F A2R39 0757 0458 1 RESISTOR 51 1K 1 125W 0 100 24546 C4 1 8 70 5112 F A2R40 0757 0442 RESISTOR 10K 1 125W F TC 0 100 2454
13. EQUIPMENT SWEEP OsolllatOE 8620 PUG 86260 Thermistor 8478 Power 432 OSCIIIOSCOPE 180 1801 1820 Crystal Detector eit 8470 012 Directional Couplet 7790 10 dB 84918 Option 010 4 7 Performance Tests Model 86260A PERFORMANCE TESTS 4 10 POWER LEVEL AND VARIATION Cont d External Leveling With Crystal Detector a Connect equipment as shown in Figure 4 5 Set detector polarity switch to either negative or positive to match crystal detector output The polarity switch is located on top of the A2 ALC board just inside 86260A To gain access to the switch slide RF Plug in out set switch then slide back in place Set controls as follows 8620A BAND isesi 12 4 to 18 0 GHz START pointer E 12 4 GHz CW Ced 15 2 GHz urere IEEE 18 0 GHz E TRIGGER TIMIE SECONDS detect 0 1 0 01 1 KHZ SQ WV OFF Rear Panel OFF RF BLANKING OFF Rear OFF 86260A cd ee
14. Performance Tests PERFORMANCE TESTS 4 11 SPURIOUS SIGNALS Cont d SPECTRUM ANALYZER SWEEP OSCILLATOR RF PLUG IN RF OUTPUT 10 dB ATTENUATOR 10 dB ATTENUATOR V S 1 11 WAVEGUIDE MIXER POWER i TYPE NTO WAVEGUIDE TO WAVE GUIDE MIXER ADAPTER ADAPTER THERMISTOR MOUNT Figure 4 7 Spurious Signal Test Setup EQUIPMENT Sweep Osolllator ettet te nt HP 8620A SEGUON RE HP 86260A Spectrum HP 8555A 8552B 141T EE 432 Thermistor nnne 8478 10 dB Attenuator 2 8491A Option 010 Waveguide 11517 to Waveguide 281 Option 013 Waveguide to Mixer HP 11518A PROCEDURE a Connect equipment as shown in ith power meter connected through a 10 dB attenuator to the 86260A RF OUTPUT connector b Set controls as follows 8620A B ERAN pw 12 4 to 18 0 GHz CW 15 2 GHz 1 KHZ SQ WV OFF Rear Panel OFF RF BLANKING OFF Rear RF BLANKING 86260A POWER LEVEL
15. Performance Tests Model 86260A PERFORMANCE TESTS 4 14 EXTERNAL FM Cont d SPECTRUM ANALYZER SWEEP OSCILLATOR RF PLUG IN RF INPUT B00 RF OUTPUT 10 dB ATTENUATOR Figure 4 12 External Frequency Modulation Test Setup EQUIPMENT Sweep Oscilator eterne 8620 86260 Test Oscillator cr te et e ea ene HP 651B Spectrum Analyzer sse HP 8555A 8552B 141T 10 dB 84918 Option 010 PROCEDURE a Set controls as follows 8620A BAND 12 4 to 18 0 GHz eu M TEE 15 2 GHz 1 KHZ SQ WV OFF Rear Panel OFF RF BLANKING OFF Rear Panel enn OFF 86260A ON L 651 E 200 Hz OUTPUT ATTENUATOR AND AMPLITUDE Set for 2 0 divisions p p horizontal display on CRT b Connect spectrum analyzer input through 10 dB attenuator to the RF OUTPUT connector Figure 4 12 Press 8620A LINE switch to ON Center fundamental signal on spectrum analyzer CRT display Adjust test oscillator AMPLITUDE control clockwise until frequency deviation displayed on spectrum analyzer CRT is 75 MHz See Figure 4 13
16. REFERENCE DESIGNATIONS WITHIN THIS ASSEMBLY ARE ABBREVIATED ADD ASSEMBLY NUMBER TO ABBAE VIATION FOR COMPLETE DESCRIPTION DE 000000000000000 1 2 3 4 2 UNLESS OTHERWISE INDICATED 5 RESISTANCE OHMS CAPACITANCE PICOFARADS 7 9 3 FACTORY SELECTED COMPONENT TERMINED BY BIAS VOLTAGE REQUIRE MENT OF YIG OSCILLATOR 4 VOLTAGE READINGS TAKEN WITH BIAS VOLTAGE TP ADJUSTED TO 10 0 G FREQUENCY REFERENCE AMPLIFIER 10 FREQ REF 100V e 2 tze Im moom FREG i AAV pp i FROM A3 FM ASSEMBLY R26 358v COIL DRIVE Tunna VOLTAGE 1 REFERENCE DESIGNATIONS 16 6V 180V pp 10v 20 4 6 pp INVERTER T 1 1 1 1 1 1 1 1 i 1 1 D i 1 i i 1 4 89v Y i ae i in 1 49 4 1ovunres 10 100 8 o _ IOV UNREG _ _ BOZGGA VIG DRIVEN SERIAL PREFIX 100A Figure 8 14 YIG Driver Assembly Schematic 8 13 86260 52 1 POLARITY OFFSET 2 METER Figure 8 15 A2 ALC Assembly Components Location 8 14 Service Service 86200 N MAINFRAME A2 ALC ASSEMBLY 86260 60011 NOTE 1 ores n FA ES D a iE m zi 1 REFERENCE DESIGNA AMPLIFIER TIONS WI
17. neon negative nanofarad nickel plate normally open negative positive negative negative positive zero zero tempera ture coefficient not recommended for field replace ment not separately replaceable nanosecond nanowatt order by descrip tion PH BRZ PHL PRF outside diameter 2 Oval head operational amplifier gt option oscillator Peak used in parts list Pulseamplitude modulation printed circuit modula tion pulse count modulation Pulse duration modulation Picofarad phosphor bronze Phillips positive intrinsic negative peak inverse Phase lock oscillator phase modulation positive negative positive polystyrene Porcelain Positive position s used in parts list position potentiometer peak to peak peak to peak used in parts list pulse position modulation preamplifier pulse repetition frequency pulse repetition rate picosecond point pulse time modulation Pulsewidth modulation abbreviations in the peak working voltage resistance capacitance rectifier reference regulated replaceable radio frequency radio frequency interference round head right resistance inductance capacitance rack mount only root mean square round read only memory rack and panel reverse working voltage scattering parameter second time second
18. A2R11 0698 3156 R FXD MET ELM 14 7K OHM 1 1 8W 28480 0698 3156 A2R12 0757 0280 R FXD MET FLM 1K OHM 1 1 8W 28480 0757 0280 A2R13 0757 0280 R FXD MET FLM 1K OHM 1 1 8W 28480 0757 0280 A2R14 0698 3450 3 R FXD MET FLM 42 2K OHM 1 1 8W 28480 0698 3450 A2R15 0757 0280 R FXD FLM 1K OHM 1 1 8W 28480 0757 0280 A2R16 0757 0280 R FXD MET FLM 1K OHM 1 1 8W 28480 0757 0280 A2R17 0757 0280 R FXD MET FLM 1K OHM 1 1 8W 28480 0757 0280 A2R18 0757 0401 R FXD MET FLM 100 OHM 1 1 8W 28480 0757 0401 A2R19 0698 3160 R FXD FLA 31 6K OHM 1 1 8 28480 0698 3160 A2R20 2100 3162 1 R VAR CERMET 200K OHM 10 TYPE P 3 4W 28480 2100 3162 A2R21 0698 3454 R FXD MET FLM 215K OHM 1 1 8W 28480 0698 3454 A2R22 0757 0442 R FXD FLM 10 0K OHM 1 1 8W 28480 0757 0442 A2R23 0757 0442 R FXD FLM 10 0K OHM 1 1 8W 28480 0757 0442 A2R24 0757 0279 R FXD MET FLM 3 16K CHN 1 1 8W 28480 0757 0279 A2R25 0757 0280 R FXD FLM 1K OHM 1 1 8W 28480 0757 0280 A2R26 0698 3150 R FXD MET FLM 2 37K OHM 1 1 8W 28480 0698 3150 A2R27 0698 3454 R FXD MET FLM 215K OHM 1 1 8W 28480 0698 3454 A2R28 0757 0458 R FXD MET FLM 1 1k OHM 1 1 8W 28480 0757 0458 A2R29 0698 0084 1 R FXD MET FLM 2 15K OHM 1 1 8W 28480 0698 0084 A2R30 0757 0442 R FXD FLM 10 0K OHM 1 1 8W 28480 0757 0442 A2R31 0698 3451 1 R FXD MET FLM 133K OHM 1 1 8W 28480 0698 3451 A2R32 0757 0442 R FXD FLM 10 0K OHM 1 1 8W 28480 0757 0442 A2R33 0683 3955 1 R FXD COMP 3 9 MEGOHM 5 1 4W 01121
19. Model 86260 Option 004 A5 ISOLATOR PIN MODULATOR MODULATOR IN ISOLATOR IS OLATOR QUT we lt N nA c 1 i Figure 10 3 A1 YIG Driver Assembly Schematic Option 004 HEAT SINK Figure 10 4 Location of Major Assemblies Left Side View Option 004 10 4 Model 86260 Option 001 004 OPTION 001 004 INTERNAL LEVELING AND REAR PANEL OUTPUT 11 1 INTRODUCTION 11 2 This section describes the differences in the Model 86260A RF Plug in with Option 001 004 installed The components and assemblies used with the Option 001 004 are contained in this section In addition it describes the manual changes necessary to document the addition of Option 001 004 The Option 001 004 is compatible with the 86260A Option 005 and Option 006 11 3 DESCRIPTION 11 4 HP Model 86260A Option 001 004 incorporates a detector and directional coupler to provide internal leveling capability The output of the directional coupler is routed to the RF OUT rear panel connector J6 A four position ALC switch S2 is mounted on a new lower front panel 11 5 MANUAL CHANGES 11 6 The following changes are required to modify and expand the Model 86260A Operating and Service Manual to include the HP Model 86260A Option 001 004 Table 1 1 Power Level and Power Variation Change Power Level to Maximum Leveled Power Option 001 gt 6 0 dBm 4 mW Add under Power Variation the following specification In
20. This is accomplished by adding a directional coupler and a crystal detector to sample the RF output An Internal position is added to the front panel ALC switch See SECTION more information 1 28 OPTION 004 1 29 The 86260A Option 004 provides rear panel RF output through a Type N connector See SECT ON X for more information 1 30 OPTION 001 004 1 31 The 86260A Option 001 004 provides internal leveling and rear panel RF output See SECT for more information 1 32 OPTION 005 1 33 The 86260A Option 005 provides an APC 7 RF output connector_in place of the standard Type N connector Sed SECTS more information 1 34 OPTION 006 1 35 The 86260A Option 006 provides a higher power output 10 dBm as compared to the standard TM 11 6625 2917 14 amp P 14 General Information instrument 7 dBm This is accomplished by the use of a higher power YIG oscillator XIII jor more information 1 36 ACCESSORIES SUPPLIED 1 37 Two 12 4 to 18 0 GHz scales are supplied for use with the HP 8620A or HP 8620B mainframe The dial scale used with the HP 8620A mainframe has HP Part Number 86260 00008 and the one used with the HP 8620B mainframe has HP Part Number 86260 00009 Figure 1 1 1 38 EQUIPMENT REQUIRED BUT NOT SUPPLIED 1 39 To operate the instrument it must be plugged into a Model HP 8620A or 8620B Sweep mainframe 1 40 EQUIPMENT AVAILABLE 1
21. column indicate the maintenance category allocated the tool or test equipment c Nomenclature This column lists the noun name and nomenclature of the tools and test equipment required to perform the maintenance functions Stock Number This column lists the National NATO stock number of the specific tool or test equipment e Tool Number This column lists the manufacturer s part number of the tool followed by the Federal Supply Code for manufacturers 5 digit in parentheses D 5 Remarks Sec IV Not applicable Next printed page is D 3 11 6625 2917 14 amp 14 SECTION Il MAINTENANCE ALLOCATION CHART FOR HP 86260A 5 MAINTENANCE CATEGORY TOOLS AND EUR COMPONENT ASSEMBLY FUNCTION EQUIPMENT REMARKS RF PLUG IN 86260A INSPECT REPLACE REPAIR OVERHAUL YIG DRIVER ASSEMBLY Al INSPECT REPLACE REPAIR OVERHAUL ALC ASSEMBLY A2 INSPECT REPAIR OVERHAUL FM ASSEMBLY A3 INSPECT REPLACE REPAIR OVERHAUL THE RF PLUG IN MUST BE TESTED WITHIN THE 3629A YIG YTTRIUM IRON GARNET 11 6625 2917 14 amp 14 SECTION TOOL AND TEST EQUIPMENT REQUIREMENTS 86260 TOOL OR TEST MAINTENANCE NATIONAL NATO EQUIPMENT CATEGORY NOMENCLATURE STOCK NUMBER NUMBER REF CODE 1 HD SWEEP OSCILLATOR SG 1121 V 1 U 6625 00 007 6661 2 HD SPECTRUM ANALYZER
22. making or removing internal connections Any interruption of the protective grounding conductor inside or outside the instrument or disconnection of the protective earth terminal is likely to make this instrument dangerous A B Blank 11 6625 2917 148 14 This manual includes copyright material reproduced by permission of Hewlett Packard Company All rights reserved TECHNICAL MANUAL HEADQUARTERS DEPARTMENT OF THE ARMY No 11 6625 2917 14 amp P 14 WASHINGTON DC 18 March 1981 OPERATOR S ORGANIZATIONAL DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL INCLUDING REPAIR PARTS AND SPECIAL TOOLS LISTS FOR RF PLUG IN HP MODEL 86260A REPORTING ERRORS AND RECOMMENDING IMPROVEMENTS You can help improve this manual If you find any mistakes or if you know of a way to improve the procedures please let us know Mail your letter DA Form 2028 Recommended Changes to Publications and Blank Forms direct to Commander US Army Communications and Electronics Materiel Readiness Command ATTN DRSEL ME MQ Fort Monmouth NJ 07703 In either case a reply will be furnished direct to you TABLE OF CONTENTS Page INTRODUCTION SCOPE 0 1 ladexes of PUD A ONS Maintenance Forms Records and 0 1 Reporting Equipment Improvement Recommendations EIR 0 1 Administrative Storage itii cene rre ad bci nexo
23. plane angle slow blow fuse used in parts list silicon controlled rectifier screw selenium sections SEMICON semicon ductor superhigh fre quency silicon silver slide signal to noise ratio single pole double throw spring single pole single throw single sideband stainless steel standing wave ratio synchronize timed slow blow fuse tantalum temperature compensating NOTE Parts list will be n upper case MULTIPLIERS Abbreviation ESg oRR ZOH Prefix tera giga mega kilo deka deci centi milli micro nano Pico femto atto Multiple 1012 109 86260 time delay terminal thin film transistor toggle thread through titanium tolerance trimmer transistor transistor transistor television television interference traveling waye tube micro 10 used in parts list microfarad used in parts list ultrahigh frequency unregulated volt voltampere volts ac variable voltage controlled oscillator UHF volts dc volts dc working used in parts list volts filtered variable frequency oscillator 2 very high fre quency a volts volts peak to peak volts rms voltage tuned oscillator vacuum tube voltmeter volts switched watt with working inverse wirewound without yttrium iron garnet characteristic impedance Replaceable Parts TABLE 6 2 Repl
24. 0 1 Destruction of Army Electronics I ii blank 86260 Contents CONTENTS Section Page Section Page GENERAL INFORMATION 1 1 Equipment Required L 4 1 1511 1 1 Test Record 4 1 1 6 1 1 Frequency Range and Accuracy 4 1 Safety Frequency Stability 1 9 General d omen 1 1 Residual FM 10 KHz 4 4 1 11 1 1 Power Level and Variation 4 6 1 16 Instruments Covered by 1 2 Spurious Signals innen Description eese 1 2 Residual 4 12 Equivalent Source SWR 4 14 1 26 Option DOT 1 3 External FM uocant ut aset 4 16 1 28 Option 004 1 3 Internal and External 4 4 19 Option 001 004 1 3 Option 005 5 1 1 34 Option 006 1 36 Accessories Supp
25. 0081 1 OPERATIONAL AMPLIFIER 12040 LM318H A2U3 1820 0223 NTEGRATED CIRCUIT OPERATIONAL AMPL 28480 182 0223 A2U4 1820 0223 NTEGRATED CIRCUIT OPERATIONAL AMPL 28480 182 0223 86260 60012 1 BOARD ASSY FM 28480 86260 60012 1 0160 0970 1 C FXD 0 47UF 10 80VDCW 56289 192P4749R8 PTS A3C2 0160 3536 C FXD MICA 620 PF 5 100VDCW 00853 RDM15F621JIC 0180 0374 C FXD TANT 10 UF 10 20VDCW 56289 150D106X9020B2 DYS 4 0180 0374 C FXD TANT 10 UF 10 20VDCW 56289 150D106X9020B2 DYS 5 0160 1600 1 0 0082 UF 10 200VDCW 56289 192 82292 5 6 0160 2257 C FXD CER 10 5 500VDCW 72982 301 000 COHO 100J 7 0180 2208 C FXD ELECT 220 UF 10 10VDCW 56289 150D227X9010S2 DYS A3C8 0160 3536 2 C FXD MICA 620 PF 5 100VDCW 00853 RDM15F621J1C 1 1901 0025 DIODE SILICON 100 07263 2387 2 1901 0743 DIODE PWR 1 4004 IA DO 41 04713 1901 0743 A3CR3 1901 0040 DIODE SILICON 30MA 30WV 07263 FDG1088 3K1 0490 0884 1 RELAY REED 28480 0490 0884 1 0360 1514 1 TERMINAL PIN SOURCE 28480 0360 1514 A3MP2 1480 0073 2 PIN DRIVE 0 250 LG 00000 OBD 1480 0073 PIN DRIVE 0 250 LG 00000 OBD introduction to this section for ordering information 6 6 Replaceable Parts TABLE 6 2 Replaceable Parts Model 86260A Reference HP Part Qty Description Mfr Mfr Part Number Designation Number
26. 1000 VATED ADDN ASSEN UGH XA2 XAZ lt lt lt CR2 NS BLY NUMBER TO ON A2 ALG PC BOARD 1 2 ec Du 2 ABSREVIATION FOR SQUARE GD COMPLETE DESCRIP WAVE 145 61 lt lt 3301233 5 INT is connect 2 2 E 1 2 wir Gc 09 VIEM ed only for Option AE H amp 0 1853 0020 CR32 CR33 CRI i 2 UNLESS OTHERWISE Mere 18 n 6120 3 lt E ALC AMPLIFIER INDICATED connection to oro RESISTANCE 5 Zg OHMS wire in Standard in oje 5 35 100K CAPACITANCE strunent ulo ol T PICOFARADS CURRENT 3 J Oo oje db 3 A SQUARE PAD of9 CATES ONE OF THE MO o M FOLLOWING CIRCUIT BOARD of12 ie Qo eee DRAIN OF FET VIEW elo ojis E EMITTER OF TRAN Br B x RETRACE X PIN 1 OF INTEGRA BLANKING CRIS CRZ CR23 TED CIRCUIT 123 4 12 MODULAR DRIVER L al LEVELING amen Ka INPUT SWITCH Wee 2 00 Cha D Quam V Nds MF A5 ISOLATOR DIRECTIONAL 22 Ur PIN MODULATOR COUPLER 0965 0061 56 9 7 RS 2 dt A 0 01 635 12 5 1 1 RF INPUT front PANEL FROM YIG 21 T TET TUNED OSC 11 d ILLATOR As gt 49
27. 1250 0083 20 2360 0182 4 Screw 6 32 312 Flat 28480 2360 0182 21 2190 0016 2 Washer Lock 377 ID 28189 1920 02 22 2950 0001 2 Nut Hex 3 8 32 094 12697 20 4 13 23 2360 0182 2 Screw 6 32 312 Flat 28480 2360 0182 24 86260 00012 1 Rail Side 28480 86260 00012 25 86260 00005 1 Deck Main 28480 86260 00005 26 2360 0205 2 Screw 6 32 15 Pan 28480 2360 0205 2190 0018 2 Washer Lock 141 ID 28480 2190 0018 27 2360 0117 2 Screw 6 32 375 Pan 28480 2360 0117 28 86260 00007 1 Bracket PC 28480 86260 00007 29 86260 00037 1 Panel Sub 28480 86260 00037 30 0370 1101 1 Knob Power Level Control 28480 0370 1101 31 86260 00002 1 Panel Front Lower 28480 86260 00002 32 5040 0345 1 Insulator Connector 28480 5040 0345 33 0370 1001 1 Knob ALC Gain 28480 0370 1001 34 0370 0929 1 Knob ALC Switch 28480 0370 0929 35 1400 0560 1 Clip Mounting 28480 1400 0560 36 08690 60005 1 Connector RF Type N 28480 08690 60005 37 0370 1810 1 Knob RF ON OFF 28480 0370 1810 38 86260 00001 1 Panel Front Upper 28480 86260 00001 Figure 6 2 Cabinets Parts 1 of 2 6 10 Replaceable Parts Model 86260A Model 86260A Figure 6 2 Cabinet Parts 2 of 2 6 11 11 6625 2917 14 amp 14 PART NUMBER NATIONAL STOCK NUMBER CROSS REFERENCE INDEX NATIONAL NATIONAL PART STOCK PART STOCK 5 5 1555 01121 5905 00 111 1684 0490 0884 28480 5945 00 175 475
28. 1250 0118 1251 0483 86290 60005 Amphenol RF Div 311 221 1022 Amphenol RP Div 31 211 1022 Amphenol Rf Div 31 221 1022 Amphenol Corp 57 10360 375 Installation 2 12 Operating Environment 2 13 The operating environment should be within the following limitations 0 to 55 C 2 2242 22 95 relative lt 15 000 feet 2 14 RF Unit Installation 2 15 To install RF Plug in into mainframe a Set Model 8620A B mainframe line switch to off b Position drawer latch handle so rectangular cutout is exposed and slot is toward rear of unit Slide unit into place toward of compartment NOTE When sliding unit into place the drawer latch handle slot will engage the locking pin and start to move down d Press latch handle downward while still pushing in on RF Plug in until drawer latch is closed or flush with front panel 2 16 Frequency Scale Installation CAUTION To prevent damage to frequency pointers when bandswitch drum is rotated make certain that frequency scale is firmly in place and flush with band drum edges 2 17 Swing down Front Panel To frequency scale in a mainframe with a swing down front panel proceed as follows a Select correct scale See Figure 1 1 b Disengage mainframe front panel latch handle and tilt front panel down c Depress BAND Lever until desired drum position is
29. 5905 00 858 8959 1901 0040 28480 5961 00 965 5917 0757 0462 28480 5905 00 493 0783 1901 0376 28480 5961 00 790 7834 0757 0465 28480 5905 00 904 4412 1901 0535 28480 5961 00 790 7834 0757 0467 28480 5905 00 858 8868 1901 0743 18480 5961 00 496 7364 0757 0795 28480 5905 00 196 6747 1902 0025 28480 5961 00 914 3087 0757 1094 28480 5905 00 917 0580 1902 0041 28480 5961 00 858 7372 0764 0023 28480 5905 00 998 1799 1902 0048 28480 5961 00 912 3099 0811 1195 28480 5905 00 163 1325 1902 0049 28480 5961 00 911 9277 0811 1553 28480 5905 00 139 9567 1902 0064 28480 5961 00 904 0297 1200 0041 28480 5935 00 971 9712 1902 3139 28480 5961 00 494 4848 1200 0043 28480 5970 00 805 7166 1902 3149 28480 5961 00 252 1308 1250 0083 28480 5935 00 804 5144 1902 3193 28480 5961 00 247 8437 1250 0118 28480 5935 00 897 9351 1902 3290 28480 5961 00 225 9493 1251 0159 28480 5935 00 867 0119 1910 0016 28480 5961 00 954 9182 1251 1036 28480 5935 00 259 2039 1990 0325 28480 5961 00 622 0772 1251 2313 28480 5935 00 104 1184 2 331677 9 00779 5935 01 017 6539 133 32 10 013 71785 5935 00 885 8598 2N5245 80131 5961 00 350 8299 6 14 11 6625 2917 14 amp 14 PART NUMBER NATIONAL STOCK NUMBER CROSS REFERENCE INDEX NATIONAL NATIONAL PART STOCK PART STOCK NUMBER NUMBER NUMBER FSCM NUMBER 2100 2838 28480 5905 00 163 7035 2100 3056 28480 5905 00 378 0987 2100 3154 28480 5905 00 615 8111 2360 0205 28480 5305 00 583 3935 251 15 30 261 7178
30. Contents ILLUSTRATIONS Page Figure Page Major Assemblies Location 10 1 Front Panel Controls m Connector and Indicator Option 004 10 2 Major Assemblies Location Rear Panel Connectors Bottom Controls Option 004 10 3 Front panel Controls Connectors 10 31 Al YIG Driver Assembly and Indicator Option 001 9 2 Schematic Option 004 10 4 Internal Leveling Test Setup 9 3 Location of Major Assemblies Internal Leveling Slope and Left Side View Option 004 10 4 Gain Adjustments Test Setup 9 5 11 1 Front Panel Controls Connector Partial Block Diagram Option 001 9 9 Indicator Option 001 004 11 2 Al YIG Driver Partial Block Diagram Schematic Option 001 9 10 Option 001 004 11 4 A2 ALC 2 01 3 AI YIG Driver Assembly Components Location 9 11 Schematic Option 001004 11 4 2 ALC 2020 2 ALC Assembly Schematic Option 001 9 11 Schematic Opti
31. DC Magnetic 8 15 TROUBLESHOOTING With the ac power cable connected the ac line voltage 115 or 230 Vac is present at the terminals of the mainframe power line assembly FL mounted on rear panel and at the mainframe POWER switch whether the POWER switch is on or off With the top cover removed these terminals are exposed and carry ac voltages capable of causing death 8 16 Troubleshooting is generally divided into two maintenance levels in this manual The first level isolates a trouble to a circuit or assembly This is done by using a troubleshooting flow diagram that provides a step by step procedure to isolate the cause of a malfunction identify the defective assembly Troubleshooting Hints provides typical instrument symptoms and assembly level cures 8 2 Model 8620A 8 17 The second maintenance level isolates the trouble to the component Schematic diagrams and circuit descriptions for each assembly troubleshooting to the component level The schematic also contains waveforms and voltages for use during troubleshooting Locations of service illustrations useful for troubleshooting are given in Table 8 1 8 18 When troubleshooting a transistor stage check for a forward bias condition of the base emitter junction If this condition exists the next step is to remove the forward bias by shorting the base to the emitter and checking to see if the collector voltage rises to the approximate level of
32. Internal Leveling 86260A Option 001 only OSCILLOSCOPE SWEEP POWER OSCILLATOR RF PLUG IN METER 1 10 dB CRYSTAL THERMISTOR we DETECTOR MOUNT INPUT Figure 9 2 Internal Leveling Test Setup EQUIPMENT SWEEP 8620 RE RIGGEN 86260 Option 001 10 84918 Option 010 Crystal 8470 Option 012 OSellloS CODO 180 1801 1820 15 Contact Extender Board HP 5060 0049 Ext lider Cable HP 08620 60032 PROCEDURE 0 Connect equipment as shown in Figure 9 2 p Set controls as follows 8620A BAND 12 4 to 18 0 GHz START 12 4 GHz 15 2 STOP PONET cuiii 18 0 GHz MARKER MODE INT ule EM 10 1 to 0 01 1 kHz SQ WV OFF Rear OFF RF BLANKING OFF Rear Panel 86260 INT Model 86260A Option 001 4 10 5 16 PERFORMANCE TESTS POWER LEVEL AND VARIATION
33. MAINFRAME 141T 6625 00 424 4370 IP 1216 P GR 3 HD SPECTRUM ANALYZER PLUG IN HP 3555A 6625 00 422 4314 PL 1400 U 4 HD SPECTRUM ANALYZER PLUG IN HP 8552B 6625 00 431 9339 PL 1383 U 5 H OSCILLOSCOPE TEK 5440 6625 01 034 3269 6 HD FREQUENCY COUNTER HP534A 6625 00 531 4752 7 HD TEST OSCILLATOR HP 652A 6625 00 054 3483 8 HD DC DIGITAL VOLTMETER HP 3490A W 6625 01 010 9255 9 HD POWER METER AND THERMISTOR MOUNT 6625 00 006 7638 HP 432A HP H75 478A AN USM 260 10 HD TRUE RMS VOLTMETER JF 8922 A AA 11 HD DC VOLTAGE SOURCE JF 332 6625 00 481 8901 12 HD 1 ATTENUATOR HP 3500 AN USM 30 4921 00 916 2920 13 HD ADJUSTABLE AC LINE TRANSFORMER CM 16 5950 00 235 2036 14 D RF PLUG IN HP 86260A 15 HD TOOL KIT 105 U 16 0 COMMON TOOLS NECESSARY TO THE PERFORMANCE OF THE MAINTENANCE FUNCTION ARE AVAILABLE TO MAINTENANCE PERSONNEL FOR THE MAINTENANCE CATEGORY LISTED DRSEL MA Form 6013 Edition of 1 Oct 74 may be used until exhausted HISA FM 2132 77 1 Oct 77 U S GOVERNMENT PRINTING OFFICE 1986 0 491 421 40320 D 4 11 6625 2917 14 amp 14 By Order of the Secretary of the Army E C MEYER General United States Army Official Chief of Staff J C PENNINGTON Major General United States Army The Adjutant General Distribution Active Army TSG 1 WSMR 1 USAARENBD 1 USAERDAA 1 USAINSCOM 2 USAERDAW 1 TRADOC 2 Army Dep 1 except DARCOM 1 SAAD 30 TECOM 2 TOAD 14 OS Maj Comd 2 SHAD 2 USACC 2 U
34. OUTPUT Power Level Stability with temperature change lt 0 1 dB C Dynamic range of 86260A POWER LEVEL con trol while maintaining 60 40 symmetry of internal 1 kHz square wave Leveled gt 20 dB Unleveled gt 30 dB Source SWR Unleveled lt 2 0 Output Impedance of 86260A RF OUTPUT con nector 50 ohms nominal The values in this table are not specifications but are typical performance characteristics for information to the user Some YIG start up problems may occur below 12 4 GHz 11 6625 2917 148 14 86260 General Information Table 1 2 Supplemental Performance Characteristics 86260A Installed ill 86204 2 of 2 SUPPLEMENTAL PERFORMANCE CHARACTERISTICS1 MODULATION GENERAL External FM Oscillator Type Fundamental FM NORM PL switch in FM position Sensitivity 20 MHz V Net Weight 7 lbs 8 02 3 4 kg Rate DC to 2 MHz at 2 MHz deviation Dimensions With 8620A B overall Internal AM 5 1 4 inches 133 4 mm high 11 inches Below maximum leveled power 297 4 mm deep 16 3 4 inches 425 5 mm wide RF Blanking ON OFF Ratio gt 25 dB External AM Options Frequency Response 50 modulation With RF signal down 6 dB from maximum Option 001 Internal Leveling power output Option 004 Rear Panel RF output Unleveled DC to 500 kHz Option 005 APC 7 RF Output connector Leveled DC to 300 kHz Option 006 High power output 1 The values in this table are not specifications but are
35. YIG tuned oscillator there 86260 Service must be a minimum amount of heat sink compound HP b Connect negative side of supply to DS Part Number 6040 0239 between mating surfaces of the cathode The LED should light oscillator and heat sink to ensure sufficient heat transfer CAUTION 8 28 Unleveled Lamp The LED current must be limited to The UNLEVELED lamp 051 is a light emitting diode less than 50 mA to prevent damage to LED It may be checked as follows the LED a Connect a 178 ohm resistor between DS1 Removal and installation procedure are described in anode and 5 Vdc 8 3 86260 Service DS1MP1 BLACK T FRONT SLOT MOUNTING PANEL CLIP UNLEVELED 1400 0560 LAMP FRONT PANEL 1990 0325 DS1MP2 RETAINER 0510 1166 WHITE DOT SOLDER CONNECTIONS CATHODE DETAIL 1 REMOVAL PROCEDURE a Remove RF Plug in from mainframe b Remove retainer ring holding DS1 in mounting clip and slide over leads Remove 05 1 from backside of front panel while pushing on 081 at front side of front panel NOTE To facilitate removal pull DS1 leads with a pair of needlenose pliers d Unsolder anode and cathode leads 2 INSTALLATION PROCEDURE a Ensure that retainer ring is over leads before soldering b Connect solder 92 white red wire to anode long lead of DS 1 and 937 white orange violet wire to cathode short lead of DS 1 NOTE On some Light Emitting Diodes LED the le
36. at pin 3 the output of the Control Amplifier will approach zero volts decreasing the conduction of both A6 and Q1 This action will cause the bias voltage to decrease until the voltages at pins 2 and 3 are equal NOTE 1 Since there is no positive supply voltage to 103 the output is limited to a negative or zero voltage NOTE2 Because of the fast equalizing action of Control Amplifier A1U3 it is not possible to measure the instantaneous voltage changes at pin 2 In normal operation the voltage at pin 2 will be within a few millivolts of the voltage at pin 3 Service Model 86260A The Lamp Driver consists of Q10 and 11 in common emitter configuration With the ALC switch in the OFF position 10 Vdc is applied to CR20 back biasing it and turning on 010 The applies to 5 Vdc to base of Q11 turning it on and lighting UNLEVELED LAMP 081 With the ALC switch in either the EXT or MTR position the 10Vdc is removed and 20V is applied to CR20 turning it on When the power level control is set to high to maintain leveling the modulator drive TP1 signal goes from a positive voltage to a 0 7 turning on Q16 With Q16 turned on Q11 turns and Unleveled Lamp 051 is on Capacitor C17 acts as a peak detector so that the lamp will light for small amounts of unleveled power Table 8 1 Troubleshooting Hints 1 of 2 Symptom Possible Cause No RF Power Low RF Power Incorrect YIG bias voltage Should be same as marked o
37. connector is on the rear output panel ALC EXT INPUT connector J3 Input for 7 Drawer Latching Handle Aids in installing and external leveling from crystal detector or power removing RF Plug in After installing handle meter locks to hold RF Plug in in place Figure 11 1 Front Panel Controls Connector and indicator Option 001 004 11 2 Model 86260 Option 001 004 the following A2R17 SLOPE Adjusts for minimum leveled power variation A2R58 GAIN Sets gain of ALC loop in internal mode Page 5 8 Add Internal Leveling Slope and Gain Adjustments Option 001 in Section IX Page 6 5 Table 6 2 Change A2 to HP Part Number 86260 60021 Change A2 Replaceable Parts List as in Section IX Add A6 HP Part Number 0955 0061 Coupler Directional Add A7 HP Part Number 5060 0313 Detector Crystal Change S2 to HP Part Number 3100 2094 Switch Lever ALC Option 001 Delete W1 Add W5 HP Part Number 86260 20015 Cable Assy RF Output Option 001 Add W7 HP Part Number 86260 20016 Cable Assy Modulator Directional Coupler Option 001 04 Add W8 HP Part Number 86260 60027 Cable Assy Detector Output Blue Option 001 004 Change HP Part Number 86260 60001 to HP Part Number 86260 60026 Cable Assy Main Option 001 Page 6 8 Table 6 2 Change HP Part Number 86260 00002 to HP Part Number 86260 00019 Panel Front Lower Option 001 004 Page 8 11 Figure 8 12 8 14l Figure 8 14 Add the Partial Block Di
38. for minimum leveled power variation A2R58 GAIN Sets gain of ALC loop in internal mode Paragraph 5 16 Internal Leveling Slope and Gain Adjustments Option 001 in this Section 9 1 Model 86260A Option 001 1 2 3 4 5 FRONT PANEL FEATURES PLUG IN UNLEVELED POWER LEVEL RF OUTPUT EXT INPUT j 8 ON OFF switch 1 Turns RF power and 6 switch 52 Selects INT internal EXT off Resets oscillator bias voltage when turned external or MTR power meter power leveling to off then on again modes In OFF position RF is not leveled light DS1 Lights when not in an automatic 7 OUTPUT J2 Type N 50 Ohm RF output leveling mode or when in a leveling mode and connector RF output is not level across the band NOTE When Option 005 is installed the LEVEL control R1 Adjusts RF power out put output connector is an APC 7 When Option 004 is installed the RF EXT INPUT connector J3 Input for external OUTPUT connector is on the rear leveling from crystal detector or power meter panel GAIN control R2 Adjusts output of ALC 8 Latching Handle Aids in installing and amplifier when using external leveling removing RF Plug in After installing handle locks to hold RF Plug in in place Figure 9 1 Front Panel Controls Connectors and Indicator Option 001 9 2 Model 86260A Option 001 PERFORMANCE TESTS 4 10 POWER LEVEL AND VARIATION
39. mainframe top cover With the top cover removed terminals are exposed that have AC voltages capable of causing death b Determine correct zener diode A1CR5 NOTE If an oscillator is replaced it may be necessary to change CR5 depending upon the new oscillator bias voltage 1 Note VBIAS indicated on oscillator nameplate 2 Refer to Table 5 2 See which Oscillator Bias Voltage Range the new oscillator is in and determine which zener diode to use Table 5 2 Selection of A1CR5 Breakdown Diode Oscillator Bias Selected Zener Voltage Range Diode Values for A1CR5 6 70V to 7 15V 7 15V to 7 77V 7 77N to 8 67V 8 67V to 9 55V 9 55V to 10 50V 10 50V and above Refer to for A1CR5 part numbers Select range that covers bias voltage required by oscillator 4 5 3 11 6625 2917 148 14 Adjustments Model 86260A ADJUSTMENTS 5 13 OSCILLATOR BIAS LEVEL AND BIAS LIMIT ADJUSTMENT Cont d NOTE If the Bias Voltage of the new oscillator is in the same range as the Bias Voltage of the old oscillator no replacement is necessary 3 Replace 5 with correct zener diode if the new and old diodes are in different Bias Voltage Ranges 4 Select zener diode that corresponds to the range of the new oscillator bias voltage Example The old bias voltage was 9 50V and the new bias voltage is 7 5V The old oscillator is in the range of 8 67 to 9 55V using an 8 25V zener di
40. output voltage which is an analog of the frequency 3 6 OPERATOR S CHECK 3 7 is an operators check procedure and is supplied to allow the operator to make a quick check of the main instrument functions prior to use The operator s check assumes that the RF Plug in is installed in an 8620A Sweep Oscillator mainframe The test covers the Plug in and mainframe 3 1 therefore if the correct indications are not obtained trouble may be in either unit If the RF Plug in is suspected use the performance test in Section IV determine if the instrument is working correctly Otherwise follow the troubleshooting chart in Section to isolate the problem 3 8 OPERATING INSTRUCTIONS 3 9 through 3 8 give the general operating procedures for the RF Plug in 3 10 External Crystal Detector Leveling 3 11 External leveling using a directional coupler and crystal detector allows for leveled RF power near the point of measurement This leveling system uses the coupler to sample the RF output signal and a crystal detector to produce a dc voltage proportional to RF signal level Detector output between 25 mV and 250 mV The detector dc output voltage is applied to amplifiers in the 86260A Leveling loop and a PIN modulator to control the RF output power level A polarity switch on the A2 ALC Board Assembly selects either positive or negative inputs to match output polarity of the crystal detector To operate in the exter
41. s 3 2 PERFORMANCE 4 1 Option 001 Internal Leveling 9 1 Introduction 11 6625 2917 14 amp 14 11 6625 2917 148 14 Contents Model 86260A CONTENTS Cont d Section Page Section Page 9 1 Manual Changes 11 1 Manual 9 1 X Option 004 Rear Panel Output XIT Option 005 APC 7 m Output 112 1 12 2 Introduction eese 10 1 Introduction esses 12 1 12 2 10 1 12 1 12 2 Option 004 Manual Changes 10 1 Manual Changes 12 1 12 2 Option 001 004 Internal Leveling XIII JOption 006 High Power Output 13 1 13 2 and Rear Panel Introduction esee 13 1 13 2 Introduction tatis 13 1 13 2 11 1 Manual Changes 13 1 13 2 APPENDIXES Page APPENDIX A azdziziezcc
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43. to Table 5 3 for the selection of A ICR5 and paragraph 5 13 the installation and adjustment procedure Table 5 1 List of Adjustments Reference Schematic Designation Name BIAS LEVEL Adjusts bias voltage applied to YIG tuned Oscillator BIAS LIMIT Adjusts firing point of over voltage protec tion for YIG tuned Oscillator LOW Adjusts tuning voltage level for low frequency limit of band HI Adjusts tuning voltge level for high frequency limit of band OFFSET Adjusts bias level offset for leveling amplifier POWER LEVEL Front panel control to adjust level of RF power output GAIN Front panel adjustment for gain of ALC amplifier 5 1 Adjustments 5 7 RELATED ADJUSTMENTS TM 11 6625 2917 14 amp P 14 Model 86260A which the oscillator operates with the best power distribution across the band and in the most stable mode The BIAS LIMIT is an equipment protection control and adjusts the firing point at which the bias voltage is removed from the oscillator 5 8 The bias voltage applied to the YIG tuned Oscillator A4 must be checked prior to making the frequency adjustments since there is interaction bet ween these controls 5 10 The oscillator bias voltage must be checked prior to setting the and LOW tuning voltage limits for the 5 9 The BIAS LEVEL and BIAS LIMIT adjustments are high and low frequency points not interacting controls but the adjustments must be done in the order indicated by the proce
44. 0 10 Pages 7 3 86260 90012 Model 86260A ERRATA Cont d Page 1 5 Table 1 1 MODULATION Change sixth line under External FM to read DC to 200 Hz 75 MHz Change seventh line under External FM to read 200 Hz to 200 kHz 5 MHz Page 1 Table 1 1 footnotes 71 be necessary to calibrate the 86260 the 8620 mainframe which it will be used Refer to the adjustments section paragraph 5 14 1 7 Table 1 2 Change External AM specification to read Unleveled DC to 500 kHz Leveled DC to 300 kHz Paragraph 4 7 Add the following note before PROCEDURE NOTE It may be necessary to calibrate the 86260A in the 8620 mainframe in which it will he used Refer to the adjustment section paragraph 5 14 Paragraph 4 8 SPECIFICATION Change second line of Frequency Stability to With 10 dB power level change from specified maximum power 6 MHz Page 4 4 Paragraph 4 8 lsteps b and Change step d in second sentence to step a Page 4 4 Paragraph 4 8 step d Change first sentence to Set POWER LEVEL to specified maximum power and note frequency indication on counter Page 6 1 Paragraph 6 2 Delete second sentence reference Table 6 1lis a list of exchange assemblies Second sentence should read lists abbreviations used in the parts list and throughout the manual Change beginning of third sentence Table 6 2 lists replaceable Change beginning of last sentence to contains n
45. 0 0104 1 Washer Lock 0 439 ID 00000 OBD J2MP7 2950 0132 1 Nut Hex 7 16 OD 00000 OBD 28 Threads per inch J2MP8 08761 2027 1 Insulator 28480 08761 2027 Figure 6 1 RF Output Connector J2 Exploded View 6 9 Reference HP Part Description Mfr Part Number Designation Number CABINET PARTS 1 08621 20052 1 Screw Latch 28480 08621 20052 2 08621 20051 1 Handle Drawer Latch 28480 08621 20051 3 3050 0001 1 Washer Latch Handle 28480 3050 0001 4 1460 1186 1 Spring Latch 28480 1460 1186 5 86260 00004 1 Panel Left Side 28480 86260 00004 6 2360 0115 2 Screw 6 32 312 28480 2360 0115 7 86260 00006 1 Bracket 28480 86260 00006 8 0590 0182 1 Heat Sink Oscillator 28480 0590 0182 9 2360 0117 2 Screw 6 32 375 Pan 28480 2360 0117 10 86260 20003 1 Heat Sink Driver 28480 86260 20003 11 1200 0041 2 Socket Transistor 28480 1200 0041 1200 0043 2 Insulator Transistor 28480 1200 0043 12 0590 0106 2 Nut Plastic Hex 2 56 141 28480 0590 0106 13 08621 2002 1 Frame Rear 28480 08621 20002 14 08621 00006 1 Spring Ground 28480 08621 00006 15 1251 0483 1 Connector 36 Pin Male 71785 57 10310 375 Microribbon 16 0520 0131 2 Screw Cap 1 4 x 20 1 5 28480 0520 0131 17 86260 20003 1 Heat Sink Bias 1 86260 20003 18 2200 0143 2 Screw 4 40 375 Pan 28480 2200 0143 2190 0019 2 Washer Lock 115 ID 28480 2190 0019 19 1250 0118 2 Connector BNC Female Long 28480 1250 0118 1250 0083 1 Connector BNC Female Short 28480
46. 0 0698 3102 A1R24 0698 3150 2 R FXD MET FL4 2 37K OHM 11 1 8W 28480 0698 3150 A1R25 0811 3207 R FXD WW 2 5K OHM 28480 0811 3207 A1R26 0811 1178 1 R FXD WW 6 19K OHM 13 1 8W 28480 0811 1178 A1R27 0757 0346 2 R FXO MET ELM 10 OHM 11 1 6W 28480 0757 0346 A1R28 0811 1553 1 R FXD WW 0 68 OHM 53 2W 28480 0811 1553 A1R29 0757 0467 1 RPFXO MET ELM 121K OHM 1 1 8W 28480 0757 0467 A1R30 0683 2265 3 R FXD COMPO 22 MEGOHM 5 1 4W 01121 CB 2265 6 4 8620 TABLE 6 2 Replaceable Parts Replaceable Parts Reference HP Part Description Mfr Part Number Designation Number A1R31 0757 0440 1 R FXD MET FLM 7 50K OHM 1 1 8W 28480 0757 0440 A1R32 0757 0416 2 R FXD MET FLM 511 OHM 1 1 8W 28480 0757 0416 A1R33 0757 0279 3 R FXD MET FLM 3 16K OHM 1 1 8W 28480 0757 0279 A1R34 2100 3056 R VAR CERMET 5K OHM 10 TYPE P 3 4W 28480 2100 3056 A1R35 0757 0290 1 R FXD FLM 6 19K OHM 1 1 8W 28480 0757 0290 A1R36 0757 0279 R FXD MET FLM 3 16K OHM 1961 8W 28480 0757 0279 A1R37 0157 0441 R FXD FLM 8 25 OHM 1 1 8W 28480 0757 0441 A1R38 0757 0394 3 R FXD FLM 51 1 OHM 1 1 8W 28480 0157 0394 A1R39 0757 0397 1 R FXD FLM 68 1 OHM 1 1 8W 28480 0757 0397 A1R40 0698 3152 1 R FXD FLM 3 48K OHM 1 1 8W 28480 0698 3152 A1R41 0757 0416 R FXD MET FLA 511 OHM 1 1 8W 28480 0757 0416 A1R42 0698 3453 1 R FXD MET FLM 196K OHM 1 1 8W 28480 0698 3453 A1R43 2100 3056 R VAR CERMET 5K OHM 10 TYPE P 3 4W 2848
47. 0 2100 3056 A1R44 0757 0280 R FXD MET FLM 1K OHH 1 1 8W 28480 0757 0280 A1U1 1820 0223 3 NTEGRATED CIRCUIT OPERATIONAL AMPLIFIER 28480 1820 0223 A1U2 1826 0013 C LINEAR 28480 1826 0013 A1U3 1820 0223 NTEGRATED CIRCUIT OPERATIONAL AMPL 28480 1820 0223 A2 86260 60011 1 BOARD C 24480 86260 60011 A2C1 0140 0198 4 C FXD MICA 200 PF 596 300VDCW 72136 RDM15F201J3C A2C2 0160 2255 2 C FXD CER 8 2 PF 50VDCW 72982 301 00 COHO 829C A2C3 0160 0174 2 C FXD CER 0 47 UF 80 20 25VDCW 56289 5C11875 CML A2C4 0140 0198 C FXD MICA 200 PF 52 300VDCW 72136 RDM15F201J3C A2C5 0160 2255 C FXD CER 8 2 PF 72982 301 000 COHO 829C A2C6 0180 1743 3 C FXD ELECT 0 1 UF 105 35VDCW 56289 150D104X9035A2 DYS A2C7 0160 0127 C FXD CER 1 0 UF 205 25VDCW 56289 5C13CS CML A2C8 0160 0127 C FXD CER 1 0 UF 20 25VDCM 56289 5C13CS CML A2C9 0160 3459 C FXD CER 0 02 UF 205 10VDCW 56289 CO023F101H203MS22CDH A2C10 0160 0174 C FXD CER 0 47 UF 80 202 25VDCW 56289 5C11B7S CML A2C11 0160 2306 1 C FXD MICA 27 PF 55 300VDCW 28480 0160 2306 A2C12 0180 1743 C FXD ELECT 0 1 UF 105 35VDCW 56289 150D104X9035A2 DYS A2C13 0160 0127 C FXD CER 1 0 UF 202 25VDCW 56289 5C13CS CML A2C14 0160 0127 C FXD CER 1 0 UF 205 25 56289 5C13CS CML A2C15 0160 3454 1 C FXD CER 220 PF 10 500VDCW 56289 C067F501F221KS22 CDH A2C16 0180 1743 C FXD ELECT 0 1 UF 105 35VDCW 56289 150D104X9035A2 DYS A2C17 0180 0197 1 C FXD ELECT 2 2 UF 10 20VDCW 56289 150D225X9020A2 DYS A2CR1 1901 0025 DIOOE
48. 00 3085 53 3101 0106 1 SWITCH SLIDE 82389 11D1031C 856260 20005 1 CABLE ASSY RF OUTPUT 28480 86260 20005 63 86260 60005 1 CABLE ASSY DRIVE OSCILLATOR 28480 86260 60005 1 1251 0159 3 CONNECTOR PC EDGE 2 X 15 CONTACT 71785 251 15 30 261 XA2 1251 0159 CONNECTOR PC EDGE 2 X 15 CONTACT 71785 251 15 30 261 1251 0159 2 15 71785 251 15 30 261 MISCELLANEOUS 0370 1810 2 KNOB LEVER SWITCH OLIVE BLK RF OFF ON 28480 0370 1810 0590 0007 1 NUT HEX 1 2 20 THREAD 73734 OBD 0590 0075 2 NUT CAPACITOR 4 40 THREAD 00000 OBD 1200 0041 2 SOCKET TRANSISTOR 71785 133 32 10 013 1200 0043 2 INSULATOR TSTR MOUNTING TO 3 71785 293011 141 0069 1 BUSHING POT 1 4 32 EXTERNAL THREAD 00866 5040 0345 2 INSULATOR CONNECTOR 28480 5040 0345 86260 00008 1 SCALE FOR USE WITH 8620A MAINFRAME 28480 86260 0008 86260 00009 1 SCALE FOR USE WITH 8620B MAINFRANE 28480 86260 00009 86260 60001 1 CABLE ASSY MAIN 28480 86260 60001 86260 60002 1 CABLE ASSY SHIELD 2 28480 86260 60002 6 7 Replaceable Parts Reference Designation HP Part Number 86260 20003 0403 0153 0403 0154 86260 20008 1400 0825 1460 1186 86260 00006 6960 0016 86260 00010 6960 0046 86260 70004 7123 2359 08612 00006 08621 20002 08620 20005 08640 60103 86260 00001 86260 00002 86260 00004 86260 00005 86260 00007 86260 00011 86260 00012 TABLE 6 2 Replaceable Parts MISCEL
49. 00NA DO 7 28480 1901 0033 A2CR37 1910 0018 2 OiODE GE 60V 60 1US DO 7 28480 1910 0316 A2CR38 1910 0016 DIODE GE 60 60 105 DO 7 28480 1910 0016 A2MP1 4040 0750 2 EXTRACTOR PC BD RED POLYC 062 BD THKNS 2B480 4040 0750 A2MP2 4040 0750 EXTRACTOR PC BD RED POLYC 062 BD THKNS 28480 4040 0750 A2Q1 1855 0081 7 TRANSISTOR J FET 2N5245 N CHAN D MODE 1 01295 2N5245 A2Q2 1854 0071 4 TRANSISTOP NPN SI PD 300MW FT 200MHZ 28480 1854 0071 A2Q3 1855 0081 TRANSISTOR J FET 2N5245 N CHAN D MODE 1 01295 2NS245 204 1853 0451 2 TRANSISTOR PNP 2 3799 28480 1853 0451 A2Q5 1853 0451 TRANSISTOR PNP 2N3799 28480 1853 0451 A2Q6 1855 0081 TRANSISTOR J FET 2N5245 N CHAN D MODE 1 01295 2N5245 A2Q7 1855 0081 TRANSISTOR J FET 2N5245 N CHAN D MODE 1 01295 2N5245 A2Q8 1855 0081 TRANSISTOR J FET 2N5245 N CHAN D MODE 1 01295 2N5245 A2Q9 1853 0020 2 TRANSISTOR PNP SI PD 300MW FT 150MHZ 28480 1853 0020 A2Q10 1855 0020 1 TRANSISTOR J FET N CHAN D MODE TO 18 81 28480 1855 0020 A2Q11 1854 0071 TRANSISTOR NPN SI PD 300MW FT 200MHZ 28480 1854 0071 A2Q12 1854 0039 1 TRANSISTOR NPN 2N3053 1 5 PD 1W 04713 2N3053 A2Q13 1853 0020 TRANSISTOR PNP SI PD 300MW FT 150MHZ 28480 1853 0020 A2Q14 1855 0081 TRANSISTOR J FET 2N5245 N CHAN D MODE 51 01295 2N5245 A2Q15 1854 0071 TRANSISTOF NPN SI PD 300MW FT 200MHZ 28480 1854 0071 Model 86260A Option 001 Table 9 1 Replaceable Parts Reference HP Part Qty Description Mfr Mfr Part Number Designation Number Code
50. 08708 60007 1854 0071 Plug in connection information Socket designation for A2 assembly Number indicates pin of socket XA2 REFERENCE sons Tew ASSEMBLIES ARE ABBREV ATEC Pat CLUDES ASSEMBLY MUmI ate oe DEG TOS OF 0 m COMPLETE 15 plug part of the assembly Reference designators deleted by circuit changes are listed here List of all the reference desig nations on the diagram Connector symbols within the borderlines of circuit assemb lies signify connections to the assembly which are separate from those made through the integral bold number 3 in this example J3 not mounted on assembly A2 Non plug in connection information Solder point numbered REFERENCE DESIGNATIONS A2 A XA2 RI DELETED N Assembly reference designator s Large numbers in lower right corners of schematic diagrams are service sheet numbers They are provided for con venience in tracing inter connections Figure 8 8 General Information on Schematic Diagrams 8 5 86260 Service P O O L 4I SCHEMATIC DIAGRAM NOTES Resistance is in ohms inductance is in microhenries capacitance is in picofarads unless otherwise noted Part of Asterisk denotes a factory selected value Value shown is typical Panel control Screwdr
51. 1 DIODE BREAKDOWN 9 09 5 28480 1902 3149 A1CR4 1902 3193 1 DIODE BREAKDOWN 13 3V 5 28480 1902 3193 A1CR5 1902 0049 0 DIDODE BREAKDOWN 6 19V 5 047133 5210939 122 1 5 1902 0064 0 DIDODE BREAKDOWN 7 5V 28480 1902 0064 A1CR5 1902 3149 0 DIODE BREAKDOWN 9 09V 5 28480 1902 3149 A1CR5 1902 0025 0 DIODE BREAKDOWN 10 0V 5 400 MW 28480 1902 0025 A1CR5 1902 3139 0 DIODE BREAKDOWN 8 25V 5 04173 5210939 158 A1CR5 1902 0048 0 DIODE BREAKDWON 6 81V 5 04713 Z10939 134 A1CR6 1901 0743 2 DIODE BREAKDOWN A1CR7 1902 3290 1 DIODE BREAKDOWN SILICON 31 6V 5 28480 1902 3290 A1F1 2110 0047 1 FUSE CARTRIDGE 1A 71400 TYPE GMW 1 A1K1 0490 0885 1 RELAY REED 24VDC 80131 0192241 A1MP1 0360 0065 2 TERMINAL SOLDER STUD SWAGE TYPE 0000 OBD A1MP2 0360 0065 TERMINAL SOLDER STUD SWAGE TYPE 00000 OBD 1251 2313 2 CONNECTOR SINGLE CONTACT 00779 3 332070 5 1 4 1251 2313 CONNECTOR SINGLE CONTACT 00779 3 332070 5 5 1400 0774 2 CLAMP CABLE 0 375 DIA 00000 OBD 6 1400 0774 CLAMP CABLE 0 375 DIA 00000 OBD A1MP7 4040 0749 2 EXTRACTOR PC BOARD BROWN 28480 4040 0749 4040 0749 EXTRACTOR PC BOARD BROWN 28480 4040 0749 A1Q1 1854 0404 1 TSTR SI NPN 28480 1854 0404 A1Q2 1853 0038 2 TSTR SI PNP 28480 1853 0038 A1Q3 1884 0073 1 THRISTOR SCR 03877 4051 104 1853 0451 3 TSTR PNP 2N3799 28480 1853 0451 A1Q5 1853 0451 TSTR PNP 2N3799 28480 1853 0451 A1Q6 1853 0038 TSTR SI PNP 28480 1853 0038 A1Q7 1854 0071 7 TSTR SI NPN SELE
52. 14 amp P 14 Model 86260A Table 1 2 Supplemental Performance Characteristics for 86260A Installed in 8620A 1 of 2 SUPPLEMENTAL PERFORMANCE CHARACTERISTICS FREQUENCY Frequency Range Usable 12 0 to 18 0 GH72 Frequency Accuracy FM NORM PL switch in FM or NORM position START STOP END POINTS Sweep Time 0 01 to 0 1 sec lt 168 MHz or lt 56 MHz t2 of sweep width Marker Sweep Time gt 0 1 sec lt 112 MHz Sweep Time 0 01 to 0 1 sec lt 168 MHz or lt 56 MHz 2 of sweep width AF CENTER FREQUENCY MANUAL Sweep lt CW Frequency 1MHz 2 of sweep width AUTO Sweep Sweep Time 0 01 to 0 1 sec lt CW Frequency 1 MHz 4 of sweep width A F Sweep Width MANUAL Sweep lt 1MHz 3 10 e of sweep width AUTO Sweep Sweep time gt 0 1 sec lt 1MHz 1 12 of sweep width AUTO Sweep Sweep time 0 01 to 0 1 sec lt 1 MHz 3 17 of sweep width CW VERNIER CW Vernier Frequency lt 2 MHz 3 10 of scale setting CW REMOTE PROGRAMMING CW Frequency lt 25 MHz Frequency Linearity Correlation between frequency and SWEEP OUT voltage Sweep Time 0 1 sec gt 112 MHz Sweep Time 0 01 to 0 1 sec gt 168 MHz or lt 56 MHz 2 of sweep width Residual FM in 10 kHz BANDWIDTH FM NORM PL switch in FM position MANUAL sweep mode lt 100 kHz Residual FM in 10 kHz Bandwidth FM NORM PL switch in NORM position All MANUAL or AUTO sweep modes lt 100 kHz peak POWER
53. 17 value to 51 1 CHANGES Change third line to read Add A7 HP Part Number 86290 60045 Detector LBHCD Hot Carrier Diode NOTE The 86290 60045 Hot Carrier Diode Detector is a recommended replacement for the 5060 0313 Crystal Detector Page 9 11 Change A7 Detector HP Part Number to 86290 60045 7 8 86260 90012 CHANGE 6 Cont d Page 11 3 Change second entry for Page 6 7 Table 6 2 to read Add A7 HP Part Number 86290 60045 Detector LBHCD Hot Carrier Diode NOTE The 86290 60045 Hot Carrier Diode Detector is a recommended replacement for the 5060 0313 Crystal Detector Page 11 5 Figure 11 4 Change A7 Detector HP Part Number to 86290 60045 CHANGE 7 Front Cover Delete OPTION 006 Title Page Delete OPTION 006 Page iii Contents Section I General Information Delete entry 1 34 Option 006 Page iv Contents Section XIII Option 006 High Power Output Delete entry fo Delete reference to Option 006 Page 1 9 Paragraph 1 34 Delete paragraphs 1 34 and 1 35 POWER OUTPUT Change Power Level Maximum Leveled Power to gt 10 dBm 10 mW Change Spurious Signals entry to read Below fundamental at 10 dBm power output Page 4 6 Paragraph 4 10 SPECIFICATION Change Maximum Leveled Power specification to gt 10 dBm 10 mW Page 4 8 Paragraph 4 10 step Change power meter indication in last line to 10 dBm SPECIFICAT
54. 2 Exploded Cabinet 1 6 10 Partial Schematic of 2 ALC Assembly CHANGE B 7 2 YIG Sphere in Non Magnetic Field 8 1 YIG Sphere in Magnetic Field Net Magnetization Vector Magnetization Vector with RF Field Applied L 8 1 Increased DC Magnetic Field Coupling RF and DC Magnetic 8 2 UNLEVELED Lamp Removal Replacement Procedure 8 4 General Information on Schematic Schematic Diagram Notes Schematic Measurement Conditiong 8 8 Troubleshooting Test Setup Troubleshooting Block Diagram 8 11 A1 YIG Driver Assembly Component Locations 8 13 A1 YIG Driver Assembly Schemalic ts 8 13 A1 ALC Assembly Components Location 8 15 A2 ALC Assembly Schematic FM Assembly Components Location FM Assembly Schematic Adjustments and Test Points net eet cte 8 19 8 20 p T LC A 1 1 1 1 1 1 1 Ie e AP 86260 11 6625 2917 14 amp 14
55. 3R18 0757 0401 R FXD MET FLM 100 OHM 1 1 8W 28480 0757 0401 A3R19 0757 0346 R FXD MET FLM 10 OHM 1 1 8W 28480 0757 0346 A3R20 0698 3429 1 R FXD MET FLM 19 6 OHM 1 1 8W 28480 0698 3429 A3U1 1820 0223 NTEGRATED CIRCUIT OPERATIONAL AMPL 28480 1820 0223 A4 86260 60032 1 YIG TUNED OSCILLATOR ASSY INCLUDES SELECTED 28480 086260 60032 1 ZENER DIODE A1CR5 SEE PARAGRAPH 5 13 AS 0960 0322 SOLATOR PIN MODULATOR 28480 0960 0322 1 1251 1037 1 CONNECTOR MINAT MALE PLUG 7 CONTACT 81312 7 1251 1040 1 LOCK SPRING 8 P CONNECTOR 81312 M7 LS P1MP2 1251 1041 1 HOOD INSULATING R P CONNECTOR 81312 5 16 1251 3172 1 CONNECTOR SINGLE CONTACT 00779 2 331677 9 P2 1251 0483 1 CONNECTOR R amp P MALE 36 CONTACT PLUG 28480 1251 0483 0 1 1990 0325 1 DIODE VISIBLE LIGHT EMITTER 28480 1990 0325 J1 1251 1036 1 CONNECTOR 7 CONTACT MINIATURE HEX 81312 M7S J2 8690 60005 1 CONNECTOR TYPE N RF OUTPUT 28480 86290 60005 J3 1250 0118 1 CONNECTOR BNC ALC EXT INPUT 24931 28JR 128 1 J4 1250 0083 2 CONTECTOR BNC FM 02660 31 221 1020 J5 1250 0083 CONNECTOR BNC FREQ REF 02660 31 221 1020 C1 amp 02 1853 0252 2 TSTR SI PNP 04713 41798 1 2100 2838 R VAR COMP 20K OHM 10 LIN 0 5W POWER LEVEL 28480 2100 2838 R2 2100 2838 2 R VAR COWP 20K OHM 10 LIN 0 5W ALC GAIN 28480 2100 2838 R3 0811 3145 1 R FXD WW 20 OHM 1 096 25W 28480 0811 3145 1 3100 3086 1 SWITCH LEVER RF ON OFF 28480 3100 3086 52 3100 3085 1 ALC 28480 31
56. 4 11 6 Model 86260 Option 005 OPTION 005 APC 7 OUTPUT CONNECTOR 12 1 INTRODUCTION 12 2 The components used in the HP Model 86260A Option 005 are listed in the standard 86260A Operating and Service Manual This section provides an illustration and additional information pertinent to the Option 005 12 3 DESCRIPTION 12 4 The Model 86260A Option 005 provides an APC 7 Output connector This is accomplished by replacing the type N contact and body with the APC 7 contact and body shown in Figure 12 1 The Option 005 is compatible with all 86260A options 12 5 MANUAL CHANGES 12 6 The following changes and additions provide information to show the differences in the RF Plug in with Option 005 installed Page 6 7 Table 6 2 Add J2 HP Part Number 86260 60007 Connector Assy APC 7 Option 005 Add J6 HP Part Number 86260 60007 Connector Assy APC 7 Option 004 005 and Option 001 004 005 Figure 6 1 Replace J2MP1 and J2MP2 on the illustration with Change J2MP1 to HP Part Number 1250 0909 RF Connector APC 7 Option 005 Change J2 MP2 to HP Part Number 1250 0816 Contact RF Connector APC 7 Option 005 OPTION 005 Figure 12 1 APC 7 HF Output Connector Exploded View Option 005 12 1 12 2 Model 86260 Option 006 SECTION OPTION 006 HIGH POWER OUTPUT 13 1 INTRODUCTION 13 2 This supplement describes the differences in the Model 86260A RF Plug in with Option 006 ins
57. 4 YIG Tuned Oscillator The supply consists of Control Amplifier U3 Driver Q6 Series Regulator chassis mounted Q1 Current Limiting Q4 and Overvoltage Protection CR4 CR5 Q3 Q5 and F1 Typical oscillator bias requirements are 10V to 11 V with current between 300mA and 500mA The A1 YIG Driver Assembly also contains Frequency Reference Amplifier U2 and Q7 Relay Driver1 Inverter U1 and Coil Drive Q2 CONTROL AMPLIFIER The purpose of Control Amplifier A1U3 is to maintain a constant bias voltage to the YIG tuned oscillator The amplifier controls the voltage drop across the chassis mounted Series Regulator Q1 corresponding to instantaneous changes in the bias voltage These changes in bias voltage produce a corresponding change in voltage at the inverting input pin 2 of Control Amplifier A1U3 With the RF ON OFF switch S1 set to ON breakdown diode A1CR2 establishes a 5 11V reference at the non inverting input pin 3 of ATUS The voltage at pin 2 is compared to the voltage at pin If the voltage at pin 2 is less negative more positive than the voltage at pin 3 the negative output of the Control Amplifier increases the conduction of the driver A1Q6 The emitter follower action of A1Q6 couples a negative voltage to the series regulator 1 causing the bias voltage to increase go more negative The bias voltage will increase by this action until the voltages at pins 2 and 3 are equal If the voltage at pin 2 is more negative than the voltage
58. 41 Service accessories containing a plug in ex tender cable service board adjustment tool and RF service cables ma be obtained from Hewlett Packard by ordering Service Accessories Part No 08620 60030 This is available for convenience in aligning and troubleshooting the mainframe and the HF plug in Service aids specifically for the plug in are shown in 1 42 DELETED 1 44 RECOMMENDED TEST EQUIPMENT 1 45 Equipment recommended to maintain the Model 86260A is listed in Table 1 3 Other equipment may be substituted if it meets exceeds the critical specifications listed in the table See Section of Appendix D Maintenance Allocation Chart 1 3 1 4 blank 86260 11 6625 2917 148 14 General Information Table 1 1 Specifications for 86260A Installed in 8620A FREQUENCY Frequency Range Calibrated 12 4 to 18 0 GHz Frequency Accuracy 2 At 25 C FM switch in PL or FM position CW Mode 3 50 MHz7 All Sweep Modes Sweep Time gt 0 1 sec 70 MHz Frequency Stability Temperature 3 6 to 5 4 MHz C 300 ppm 10 Line Voltage Change 180 kHz 10 dB Power Level Change from specified maximum power 6 MHz Residual FM in 10 kHz Bandwidth 2 FM NORM PL switch in NORM position CW Mode lt 25 kHz peak POWER OUTPUT1 Power Level 2 For calibrated frequency range at 25 C Maximum Leveled Power gt 7 dBm 5 mW Power Variation Unleveled lt 4 0 dB Crystal De
59. 4546 4 1 8 1001 A2R60 0757 0438 RESISTOR 5 11K 1 125W F TC 0 100 24546 4 1 8 5111 A2R61 0698 3136 1 RESISTOR 17 8K 1 125W F TC 0 100 16299 4 1 8 1782 A2R62 0757 0438 RESISTOR 5 11K 1 125W F TC 0 100 24546 C4 1 8 TO 5111 F A2R63 0757 0199 RESISTOR 21 5K 1 125W 0 100 24546 C4 1 8 TO 2152 F A2R64 0757 0405 1 RESISTOR 162 1 125W 0 100 24546 C4 1 8 TO 162R F A2R65 0698 3439 1 RESISTOR 178 1 125W TC 0 100 16299 C4 1 8 TO 178R F A281 3101 1274 2 SWITCH SL SPDT NS SUBMIN 2A 120VAC 10389 23 021 008 A282 3101 1274 SWITCH SL SPDT NS SUBMIN 2A 120VAC 10389 23 021 008 A2U1 1826 0081 2 IC LM318H AMPL 27014 LM318H A2U2 1826 0081 LM318H AMPL 27014 LM318H A2U3 1826 0223 2 LINEAR 28480 1826 0223 A2U4 1826 0223 LINENR 28480 1826 0223 86260 Add Part Number 0955 0061 Coupler Directional Add A7 HP Part Number 5060 0313 Detector Crystal Change S2 to HP Part Number 3100 2094 Switch Lever ALC Option 001 Delete W1 Add W4 HP Part Number 86260 20014 Cable Assy RF Output Option 001 Add W5 HP Part Number 86260 20015 Cable Assy Modulator Directional Coupler Option 001 Add W6 HP Part Number 86260 60028 Cable Assy Detector Output Blue Option 001 Change HP Part Number 86260 60001 to HP Part Number 86260 60026 Cable Assy Main Option 001 Change HP Part Number 86260 00002 to HP Part Number 86260 00017 Panel Front Lower
60. 5 Altitude Up to 25 000 feet The instrument should also be protected from temperature extremes which cause condensation within the instrument 86260 11 6625 2917 148 14 Operation SECTION OPERATION 3 1 INTRODUCTION 3 2 This section explains the function of controls and indicators and typical operating modes of the Model 86260A RF Plug in 3 3 PANEL FEATURES 3 4 Front and rear panel features are described in Figures 3 1 and 3 2 Description numbers match the numbers on the illustration 3 5 The following information covers the basic purpose and function of the panel features a When the UNLEVELED indicator is on it indicates that the RF power is not level across the band The light is also on when not in an RF leveling mode b The POWER LEVEL control sets RF output level c A BNC connector labeled EXT INPUT is used in the external leveling mode It provides connection to the external leveling crystal detector or power meter Recorder Output d The GAIN control is used when leveling externally to adjust ALC gain e The ALC switch is used to select the mode of leveling external leveling power meter leveling or off when leveling of the RF is not required f The RF output is a 50 ohm connector g The rear panel FM connector allows for the input of modulation signals to frequency modulate the oscillator h The FREQ REF connector provides a dc
61. 5 0081 TSTR SI FET 8013 2N5245 A2Q5 1855 0081 TSTR SI FET 8013 2N5245 A2Q6 1853 0020 2 TSTR SI PNP SELECTED FROM 2 3702 28480 1853 0020 A2Q7 1855 0081 TSTR SI FET 8013 2N5245 A2Q8 1853 0451 TSTR PNP 2N3799 28480 1853 0451 A2Q9 1854 0053 2 TSTR SI NPN 8013 2N2218 A2Q10 1853 0020 TSTR SI PNP SELECTED FROM 2N3702 28480 1853 0020 A2Q11 1854 0071 TSTR SI NPN SELECTED FROM 2N3704 28480 1854 0071 A2012 1852 0071 TSTR SI NPN SELECTED FROM 2N3704 28480 1854 0071 A2Q13 1854 0071 TSTR SI NPN SELECTED FROM 2N3704 28480 1854 0071 A2Q14 1855 0081 TSTR SI FET 8013 215245 A2Q15 1855 0081 TSTR SI FET 8013 2N5245 A2R1 0757 0442 R FXD FLM 10 OHM 1 1 8W 28480 0757 0442 T S 6 5 Replaceable Parts TABLE 6 2 Replaceable Parts Model 86260A Reference HP Part Qty Description Mfr Mfr Part Number Designation Number Code A2R2 0757 0438 5 R FXD MET ELM 5 11K OHM 1 1 8W 28480 0757 0438 A2R3 0698 3156 2 R FXD MET ELM 14 7K OHM 1 1 8W 28480 0698 3156 A2R4 0683 2265 R FXD COMP 22 MEGOHM 5 1 4W 01121 CB 2265 A2R5 0683 2265 R FXD CCMP 22 MEGOHM 5 1 4W 01121 CB 2265 A2R6 0757 0442 R FXD FLM 10 0K OHM 1 1 8W 28480 0757 0442 A2R7 0757 0460 R FXD MET FLM 61 9K OHM 1 1 8W 28480 0757 0460 A2R8 0757 0438 R FXD FLM 5 11K OHM 1 1 8W 28480 0757 0438 A2R9 0757 3280 R FXD MET FLM 1K OHM 1 1 1 8W 28480 0757 0280 A2R10 0757 0442 R FXD FLM 10 0K OHM 1 1 8W 28480 0757 0442
62. 5 5935 00 867 0119 2950 0001 28480 5310 00 450 3324 3 332070 5 00779 5935 00 104 1184 31 221 1020 02660 5935 00 804 5144 3101 1274 28480 5930 00 407 2017 4040 0749 28480 6625 00 031 4796 4040 0750 28480 5999 00 415 1213 4040 0751 28480 5999 00 230 8835 6960 0016 28480 5340 00 178 8004 86290 60005 18480 5935 01 064 1602 STOCK NUMBERS HAVE BEEN REQUESTED FOR THOSE ITEMS THAT DO SHOW STOCK NUMBER WHEN ASSIGNED THEY WILL BE ADDED BY A CHANGE TO THIS MANUAL UNTIL STOCK NUMBERS ARE ASSIGNED THE ITEMS MAY BE REQUISITIONED BY MANUFACTURER AND PART NUMBER DIRECT FROM US ARMY COMMUNICATIONS AND ELECTRONICS MATERIEL READINESS COMMAND ATTN DRSEL MM FORT MONMOUTH 07703 6 15 6 16 86260 Manual Changes SECTION VII MANUAL CHANGES 7 1 INTRODUCTION 7 2 This section contains information for adapting changes in the sequence listed this manual to instruments for which the content does not 7 4 If your instrument serial number is not listed on apply directly the title page of this manual or in the following tables it may be documented in a yellow MANUAL CHANGES 7 3 To adapt this manual to your instrument refer to supplement For additional important information about and make all of the manual changes listed serial number coverage refer to INSTRUMENTS opposite your instrument serial number Perform these COVERED BY MANUAL in Section T Table 7 1 Manual Changes by Serial Number Serial P refix or Numbe
63. 6 4 1 8 1002 A2R41 0698 3451 1 RESISTOR 133K 1 125W TC 0 100 16299 C4 1 8 TO 1333 F A2R42 0683 3955 1 RESISTOR 3 9M 5 125W F TC 900 1100 01121 CB3955 A2R43 0757 0199 2 RESISTOR 21 5K 1 125W F TC 0 100 24546 C4 1 8 TO 2152 F A2R44 0757 0440 1 RESISTOR 7 5K 1 125W F TC 0 100 24546 4 1 8 7501 A2R45 0757 0465 RESISTOR 100K 1 125W F TC 0 100 24546 4 1 8 1003 A2R46 0757 0438 RESISTOR 5 1K 1 125W F TC 0 100 24546 4 1 8 5111 A2R47 0698 3157 1 RESISTOR 19 6K 1 125W F TC 0 100 16299 4 1 8 1962 A2R48 0698 3154 1 RESISTOR 4 22K 1 125W F TC 0 100 16299 4 1 8 4221 A2R49 0698 3454 RESISTOR 215K 1 125W F TC 0 100 16299 4 1 8 2153 A2R50 0698 3454 RESISTOR 215K 1 125W F TC 0 100 16299 4 1 8 2153 A2R51 0698 3454 RESISTOR 215K 196 125W 0 100 16299 C4 1 8 TO 2153 F A2R52 0698 3450 RESISTOR 42 2K 196 125W 0 100 16299 14 1 8 TO 4222 F A2R53 0757 0274 1 RESISTOR 1 21K 1 125W F TC 0 100 24546 4 1 8 1213 A2R54 0757 0460 RESISTOR 61 9K 1 125W F TC 0 100 24546 4 1 8 6192 A2R55 0757 0465 RESISTOR 100K 1 125W TC 0 100 24546 4 1 8 1003 A2R56 0757 0424 1 RESISTOR 1 1K 1 125W F TC 0 100 24546 4 1 8 1101 A2R57 0757 0280 RESISTOR 1K 1 125W F TC 0 100 24546 4 1 8 1001 A2R58 2100 2497 1 RESISTOR TRMR 2K 10 I TURN 19701 ET50W202 A2R59 0757 0280 RESISTOR 1K 1 125W F TC 0 100 2
64. 60021 1 3 Vdc at Min RF out INPUT 1 2 ALC EMITTER 08 AMPLIFIER FOLLOWER 510 2 FROMALC 432 431 FROM ALC 6 AT MAX RF OUT py PWR MTR 0 Vdc AT MIN RF OUT LAMP i 4 AM AMPLIFIER DRIVER XA2 POWER LEVEL l SUMMING AMPLIFIER 10V Figure 1 P O Figure 8 12 Troubleshooting Block Diagram Change 2 Page 8 15 Figures 8 15 8 16 Delete Figures 8 15 and 8 16 Add the NOTE See Figure 9 6 A2 ALC Assembly Component Locations and Figure 9 7 A2 ALC Assembly Schematic 9 1 Section IX NOTE The A2 ALC Assembly Circuit Description on page 814 applies to the A2 schematic on However since Figure 9 7 has different reference designators care must be taken when cross referencing The Read Only Memory ROM Diode Decoder in Figure 9 7 explained below Read Only Memory ROM Diode Decoder Circuit Description The diode decoder circuit in the 86260A A2 ALC Assembly Option 001 is a means for selecting one of three leveling control functions Meter External and Internal leveling The OFF position disables all leveling so the UNLEVELED lamp DS1 remains ON The following description details the operation of two circuits in the internal leveling circuitry the Slope adjust A2R17 and Internal leveling switch A2Q7 The other circuits connected to the diode decoder operate similarly
65. 7 dBm FM NORM PL Rear NORM Performance Tests Model 86260A PERFORMANCE TESTS 4 11 SPURIOUS SIGNALS Cont d 8620 LINE switch to ON press CW pushbutton Connect Spectrum Analyzer input through two 10 dB attenuators to 86260A RF OUTPUT connector See NOTE The spectrum analyzer originates some mixing harmonics that may appear on the display If a signal is in question increase the spectrum analyzer input attenuation by 10 dBm note if signal decreases in amplitude by 10 dB then return the attenuator to the original position If the signal in question originates in the spectrum analyzer the level will either change by greater or less than 10 dB or it may not change at all d Adjust 8620A B CAW control through the 12 4 to 18 0 GHz band and observe harmonics and spurious signals Identify signal in question as harmonic or as non harmonic and measure difference in dB between this signal level and the level of the fundamental frequency To observe harmonics and spurious signals in the frequency range of 18 to 40 GHz use HP 1517A External Mixer with the 8555A Spectrum Analyzer Refer to 8555A Operating and Service Manual Use signal substitution to determine signal levels when using the external mixer 4 12 RESIDUAL AM SPECIFICATION AM noise in a 100 kHz bandwidth below fundamental at maximum power Residual AM gt 50 dB below carrier DESCRIPTION The carrier signal from the 86260A Pl
66. 8 2265 01121 5905 00 402 4242 0683 2265 28480 5905 00 402 4242 C023F101H203MS22CDH 56289 5910 00 894 6728 0698 0082 28480 5905 00 974 6075 D2361 93332 5961 00 954 9182 0698 0083 28480 5905 00 407 0052 FDG1088 07263 5961 00 928 7939 0698 0084 28480 5905 00 974 6073 7 81312 5935 00 257 9879 0698 3102 28480 5905 00 007 3674 75 81312 5935 00 259 2039 0698 3136 28480 5905 00 891 4247 521798 04713 5961 00 424 9411 0698 3150 28480 5905 00 481 1357 0698 3152 28480 5905 00 420 7130 5210939 134 04713 5961 00 912 3099 0698 3154 28480 5905 00 891 4215 5210939 158 04713 5961 00 845 6458 0698 3156 28480 5905 00 974 6084 0140 0198 28480 5910 00 914 2605 0698 3157 28480 5905 00 433 6904 0160 0127 28480 5910 00 809 5484 0698 3159 28480 5905 00 407 0053 0160 0160 28480 5910 00 891 4207 0698 3160 28480 5905 00 974 6078 0160 0174 28480 5910 00 234 9817 0698 3429 28480 5905 00 407 0075 0160 2055 28480 5910 00 211 1611 0698 3439 28480 5905 00 407 0059 0160 2199 28480 5910 00 244 7164 0698 3450 28480 5905 00 826 3262 0160 2204 28480 5910 00 463 5949 0698 3451 28480 5905 00 405 3677 0160 2255 28480 5910 00 430 5934 0698 3453 28480 5905 00 078 1548 0160 2306 28480 5910 00 883 6281 0698 3454 28480 5905 00 974 6077 0160 3459 28480 5910 00 894 6728 0757 0180 28480 5905 00 972 4907 0160 3460 28480 5910 00 008 4458 0757 0199 28480 5905 00 981 7513 0180 0094 28480 5910 00 082 5119 0757 0274 28480 5905 00 858 9105 0180 0197 28480 5910 00 850 5355 0757 0279 28480 5905 00 221
67. 8310 0180 0228 28480 5910 00 719 9907 0757 0280 28480 5905 00 853 8190 0180 0374 28480 5910 00 931 7050 0757 0288 28480 5905 00 193 4318 0180 1743 28480 5910 00 430 6017 0757 0290 28480 5905 00 858 8826 0180 1746 28480 5910 00 430 6036 0757 0317 28480 5905 00 244 7189 0180 2208 28480 5910 00 172 3140 0757 0346 28480 5905 00 998 1906 0360 1514 28480 5940 00 150 4513 0757 0394 28480 5905 00 412 4036 6 13 11 6625 2917 14 amp 14 PART NUMBER NATIONAL STOCK NUMBER CROSS REFERENCE INDEX NATIONAL NATIONAL PART STOCK PART STOCK FSCM 5 0757 0397 28480 5905 00 232 3125 1820 0223 28480 5962 00 614 5251 0757 0398 28480 5905 00 788 0291 1826 0013 28480 5962 00 247 9568 0757 0401 28480 5905 00 981 7529 1826 0081 28480 5962 01 021 5220 0757 0405 28480 5905 00 493 0738 1853 0020 28480 5961 00 904 2540 0757 0416 28480 5905 00 998 1795 1853 0034 28480 5961 00 987 4700 0757 0418 28480 5905 00 412 4037 1853 0038 28480 5961 00 111 0455 0757 0420 28480 5905 00 493 5404 0757 0438 28480 5905 00 929 2529 1853 0252 28480 5961 00 424 9411 0757 0440 28480 5905 00 858 6795 1854 0071 28480 5961 00 137 4608 0757 0441 28480 5905 00 858 6799 1854 0404 28480 5961 00 408 9807 0757 0442 28480 5905 00 998 1792 1855 0081 28480 5961 00 350 8299 0757 0444 28480 5905 00 858 9132 1884 0073 28480 5961 00 654 3308 0757 0458 28480 5905 00 494 4628 1901 0025 28480 5961 00 978 7468 0757 0460 28480
68. AMPLIFIER U4 and summed with the dc reference voltage established by the REFERENCE AMPLIFIER U3 EXTERNAL AM AMPLIFIER AMPLIFIER AND SUMMING AMPLIFIER The External AM Amplifier U4 is a fixed gain 1 47 amplifier for External AM signals The Reference Amplifier U3 provides additional fixed gain 1 47 and a fixed dc offset voltage 2 4V to the front panel POWER LEVEL control REFERENCE SUMMING AMPLIFIER The Summing Amplifier Q12 and Q13 sums internal AM signals from the 8620A Sweep Oscillator Blanking Marker 1 KHZ Square Wave with the dc reference voltage established by the front panel POWER LEVEL control setting Positive signals applied to the base of Q13 are inverted and applied to the front panel POWER LEVEL control In power MTR mode Q12 is turned on and shunts the internal AM signal to ground This is done to prevent power meter measurement error that would be caused by amplitude modulation EXT MTR SWITCH The EXT MTR external crystal detector power meter switch consists of two field effect transistors FET s Q14 and Q15 used as switches between the ALC EXT INPUT connector and the ALC Preamplifier to select the leveling feedback source used With the ALC switch in the EXT position 20Vdc is applied to the gate of Q15 turning it on and providing a low resistance path for the EXT crystal feedback voltage to the ALC Preamplifier When power MTR is selected 14 is turned on allowing the fee
69. C CER 28480 0160 0127 A2C8 0160 0127 CAPACITOR FXD 1UF 1 22096 25WVDC CER 28480 0160 0127 A2C9 0160 3452 1 CAPACITOP FXD 02UF 20 100WVDC CER 28480 0160 3452 A2C10 0160 2306 1 CAPACITOR FXD 27PF 27 300WVDC MICA 28480 0160 2306 A2C11 0160 0174 CAPACITOR FXD 47UF 80 20 25WVDC CER 28480 0160 0174 A2C12 0180 1743 2 CAPACITOR FXD 1UF 421096 35VDC TA SOLID 56289 150D104X9035A2 A2C13 0160 0127 CAPACITOR FXD 1UF 10 25WVDC TA SOLID 28480 0160 0127 A2C14 0160 0127 CAPACITOR FXD 1UF 20 25WVDC CER 28480 0160 0127 A2C15 0160 3446 1 CAPACITOR FXD 220PF 10 1000WVDC CER 28480 0160 3446 A2C16 0180 1743 CAPACITOR FXD 1UF 10 35VDC TA SOLID 56289 150D104X9035A2 A2C17 0180 0197 1 CAPACITOR FXD 2 2UF 10 20VDC TA 56289 1500225 9020 2 2 1 1901 0033 20 DIODE GEN PRP 180 200 DO 7 28480 190140013 A2CR2 1901 0033 DIODE GEN PRP 180V 200NA DO 7 26480 1901 0033 A2CR3 1901 0033 DIODE GEN PRP 180V 200NA DO 7 28480 1901 0033 A2CR4 1901 0033 DIODE GEN PRP 180V 200NA DO 7 29480 1901 0033 A2CR5 1901 0033 DIODE GEN PRP 180V 200NA DO 7 28480 1901 0033 A2CR6 1901 3765 DIODE GEN PRP 35V 50NA DO 7 28480 1901 0376 A2CR7 1901 0033 DIODE GEN PRP 180V 200NA DO 7 28480 1901 0033 A2CR8 1901 0033 DIODE GEN PRP 180V 200NA DO 7 28480 1901 0533 A2CR9 1901 0033 DIODE GEN PRP 180V 200NA DO 7 28480 1901 0033 A2CR10 1901 0033 DIODE GEN PRP 180V 200NA DO 7 28480 1901 0033 A2CR11 1901 0376 5 DIODE GEN PRP 35V 50NA 00 7 28480 1901 0376 A2CR12 1901 0376 DIODE GEN PEP 35
70. C8 3955 A2R34 0757 0199 2 R FXD FLM 21 5K OHM 1 1 8W 28480 0757 0199 A2R35 0757 0438 R FXD MET FLM 5 11K OHM 1 1 8W 28480 0757 0438 A2R36 0757 0465 R FXD MET FLM 100K OHM 1 1 8W 28480 0757 0465 A2R37 0698 3157 1 R FXD MET FLM 19 6K OHM 1 1 8W 28480 0698 3157 A2R38 0698 3154 1 R FXD FLM 4 22K OHM 1 1 8W 28480 0698 3154 A2R39 0698 3454 R FXD MET FLM 215K OHM 1 1 8W 28480 0698 3454 A2R40 0698 3454 R FXD MET ELM 215K OHM 1 1 8W 28480 0698 3454 A2R41 0698 3454 R FXD MET ELM 215K OHM 1 1 8W 28480 0698 3454 A2R42 0757 0274 1 R FXD FLM 1 21K OHM 1 1 8W 28480 0757 0274 A2R43 0698 3450 R FXD MET FLM 42 2K OHM 1 1 8W 28480 0698 3450 A2R44 0757 0460 R FXD MET FLM 61 9K OHM 1 1 8W 28460 0757 0460 A2R45 0757 0465 R FXD MET FLM 100K OHM 196 1 8W 28480 0757 0465 A2R46 0757 0280 R FXD MET FLM 1K OHM 1 8W 28480 0757 0280 A2R47 0757 0280 R FXD MET FLM 1K OHM 1 1 8W 28480 0757 0280 A2R48 0757 0438 R FXD FLM 5 11K OHM 1 1 8W 28480 0757 0438 A2R49 0698 3136 1 R FXD MET ELM 17 8K OHM 1 1 8W 28480 0698 3136 A2R50 0757 0438 R FXD FLM 5 11K OHM 1 1 8W 28480 0757 0438 A2R51 0757 0199 R FXD MET FLM 21 8 OHM 1 1 8W 28480 0757 0199 A2R52 0757 0405 1 R FXD MET FLM 162 OHM 1 1 8W 28480 0757 0405 A2R53 0698 3439 1 R FXD MET FLM 178 OHM 1 1 8W 28480 0698 3439 2 1 3101 1274 2 SWITCH SLIDE SPDT DB 95146 MSS 22 252 3101 1274 SWITCH SLIDE SPDT DB 95146 MSS 22 A2U1 1826 0081 2 OPERATIONAL AMPLIFIER 12040 LM318H A2U2 1826
71. CONDS Vernier 13 Fully clockwise CW VERNIER 5 Centered 1 KHZ SQ WV OFF Rear Panel RF BLANKING OFF Rear Panel 86260A ALC GAIN 11 Fully clockwise UNLEVELED Lamp ON when ALC switch is OFF FM NORM PL Rear Panel NORM Normal Press LINE pushbutton switch 19 to turn on instrument LINE START and STOP pushbuttons should light Check that RF Plug in is sweeping correctly This is indicated by a continuous signal line on oscilloscope similar to Set 8620A MARKER switch 15 to INTEN position and marker should appear on oscilloscope trace as intensity spot Set MARKER switch 15 to AMPL position and marker should appear on oscilloscope trace as a pip Figure 3 3 Operator s Check 2 of 2 3 6 11 6625 2917 148 14 86260 Operation OPERATOR S CHECK WER POWE OUTPUT OUTPUT Figure 3 4 Unleveled RF Power Output Figure 3 5 Leveled RF Power Output 0 VOC POWER OUTPUT ALC LOOP OSCILLATION Figure 3 6 Oscillations with ALC Gain Too High 3 7 11 6625 2917 148 14 Operation Model 86260A CRYSTAL LEVELING OSCILLOSCOPE SWEEP OSCILLATOR RF PLUG IN POWER METER BLANKING DETECTOR 10 98 COUPLED ATTENUATOR p O pb MAIN LINE THERMI STOR DIRECTIONAL MOUNT COUPLER EQUIPMENT Sweep Oscillator HP 8620A HP 86260A Oscilloscope HP 180A 1801A 1820A Power Meter Crystal Detector HP 8470A Option 012 10 dB Attenuator HP 8491B
72. CTED FROM 2N3704 28480 1854 0071 A1R1 0757 0458 2 R FXD MET FLM 51 1K OHM 1 1 8W 28480 0757 0458 A1R2 0757 0460 3 R FXD MET FLM 61 9K OHM 1 1 8W 28480 0757 0460 A1R3 2100 3154 1 R VAR CERMET 1000 OHM 10 TYPE P 3 4W 28480 2100 3154 A1R4 0757 0442 9 R FXD MET FLM 10 0K OHM 1 1 8W 28480 0757 0442 A1R5 0757 0442 R FXD FLM 10 0K OHM 1 1 8W 28480 0757 0442 A1R6 2100 3056 3 R VAR CERMET 5K OHM 10 TYPE P 3 4W 28480 2100 3056 A1R7 0811 2902 1 R FXD WW 3 4K OHM 1 0 1 8W 28480 0811 2902 1 8 0811 1195 1 R FXD WW 2 15 OHM 1 0 1 8W 28480 0811 1195 A1R9 0698 3454 6 R FXD FLM 215K OHM 1 1 8W 28480 0698 3454 A1R10 0757 0444 1 R FXD MET FLM 12 1K OHM 1 1 8W 28480 0757 0444 A1R11 0811 3146 1 R FXD WW 7 50K OHM 1 1 8W 28480 0811 3146 A1R12 08113209 1 R FXD WW 6 670K OHM 28480 0811 3209 A1R13 0757 0401 3 R FXD MET FLM 100 OHM 1 1 8W 28480 0757 0401 A1R14 0764 0023 1 R FXD FLM 910 OHM 5 2W 28480 0764 0023 A1R15 0811 3213 1 R FXD WW 3 16K OHM 1 28480 0811 3213 A1R16 0757 0180 1 R FXD MET FLM 31 6 OHM 196 1 8W 28480 0757 0180 A1R17 0811 3207 2 R FXD WW 2 5K OM 28480 0811 3207 A1R18 0757 0465 3 R FXD MET FLM 100K OHM 1 1 8W 28480 0757 0465 1 19 0811 3208 1 R FXD WW 2 083K OHM 28480 0811 3208 A1R20 0757 0280 13 R FXD MET FLM 1K OM 1 1 8W 28480 0757 0280 A1R21 0757 0288 1 R FXD MET ELM 9 09K OHM 1 1 8W 28480 0757 0288 A1R22 0698 0083 2 R FXD MET ELM 1 96K OHM 1 1 8W 28480 0698 0083 A1R23 0698 3102 1 R FXD MET ELM 237 OHM 196 1 2W 2848
73. Code A3MP4 4040 0751 2 EXTRACTOR PC BOARD ORANGE 28480 4040 0751 5 4040 0751 EXTRACTOR PC BOARD ORANGE 28480 4040 0751 1 1854 0071 TSTR SI NPN SELECTED FROM 2N3704 28480 1854 0071 A3Q2 1853 0034 1 TSTR SI PNP SELECTED FROM 2 3251 28480 1853 0034 A3Q3 1854 0071 TSTR SI NPN SELECTED FROM 2N3704 28480 1854 0071 4 1854 0053 TSTR SI NPN 80131 2N2218 A3R1 0757 1094 1 R FXD FLM 1 47K OHM 1 1 8W 28450 0757 1094 A3R2 0757 0394 R FXD MET FLM 51 1 OHM 1 1 8W 28480 0757 0394 0698 0083 R FXD FLM 1 96K OHM 1 1 8W 28480 0698 0083 A3R4 0757 0398 1 R FXD MET FLM 75 OHM 1 1 4W 28480 0757 0398 A3R5 0757 0420 1 R FXD MET FLM 750 OHM 1 1 8W 28480 0757 0420 A3R6 0757 0418 1 R FXD MET FLM 619 OHM 1 1 8W 28480 0757 0418 A3R7 0757 0462 1 R FXD MET FLM 75 0K OHM 1 1 8W 28480 0757 0462 A3R8 0757 0317 2 R FXD FLM 1 33K OHM 1 1 8W 28480 0757 0317 A3R9 0757 0317 R FXD FLM 1 33K OHM 1 1 8W 28480 0757 0317 A3R10 0683 1555 1 R FXD COMP 1 5 MEGOHM 5 1 4W 01121 CB 1555 11 0757 0280 R FXD FLM 1K OHM 1 1 8W 284E0 0757 0280 A3112 0698 3159 1 R FXD FLM 26 1K OHM 1 1 8W 28480 0698 3159 A3R13 0698 0082 1 R FXD MET FLM 464 OHM 1 1 8W 28480 0698 0082 A3R14 0698 3450 R FXD MET FLM 42 2K OHM 1 1 8W 28480 0698 3450 A3R15 0157 0394 R FXD FLM 51 1 OHM 1 1 8W 28480 0757 0394 A3R16 0757 0280 R FXD MET FLM 1K OHM 1 1 8W 28480 0757 0280 A3R17 0757 0795 1 R FXD MET FLM 75 OHM 1 1 2W 28480 0757 0795 A
74. Cont d 8620A LINE switch to ON Press 8620A START pushbutton Adjust POWER LEVEL control fully clockwise then counterclockwise until UNLEVELED lamp goes out The power meter should indicate gt 6 0 dBm minus any additional loss due to other equipment used With Option 006 installed power meter should indicate gt 9 dBm 8620A CW pushbutton Adjust oscilloscope trace to bottom of display and note trace position Decrease output power indication on power meter by 1 dB by adjusting POWER LEVEL control and note position of oscilloscope trace The area between two positions noted represents leveling tolerance of 0 7 dB 8620A rear panel RF Blanking OFF switch to RF Blanking Press 8620A START pushbutton Adjust POWER LEVEL control fully clockwise then counterclockwise until UNLEVELED lamp goes out for maximum leveled power position of oscilloscope trace vertically so it is displayed between the upper and lower specification limits noted in Step r The highest and lowest portion of the sweep trace must be within the 1 4 dB peak to peak limit noted ADJUSTMENTS INTERNAL LEVELING SLOPE AND GAIN ADJUSTMENTS OPTION 001 REFERENCE Service Sheet 2 ALC ASSEMBLY DESCRIPTION Adjust SLOPE control A2R17 to provide minimum leveled power variation Adjust GAIN control A2R58 for sufficient ALC gain without oscillation Model 86260A Option 001 5 16 ADJUSTMENTS INTERNAL LEVELING SLOPE AND GAIN ADJUSTMENTS Option 000 Cont d
75. D VARIATION Cont d j Press 8620A CW pushbutton Adjust oscilloscope trace to bottom of display and note trace position Decrease output power indication by 0 2 dB by adjusting POWER LEVEL control Note trace position The area between the two positions noted represents leveling tolerance of 0 1 dB Press 8620A START pushbutton Adjust POWER LEVEL control fully clockwise then counterclockwise until leveled RF condition is met Set 8620A MODE switch to MANUAL Adjust the MANUAL sweep control slowly through the sweep band and note maximum and minimum power meter indications These should be within tolerance limits noted on oscilloscope display If necessary adjust trace position vertically to center it between upper and lower limits Unleveled Power Turn AL C off Adjust POWER LEVEL control for maximum power out Adjust the MANUAL sweep control slowly through the band and note maximum and minimum power meter indications The difference between maximum and minimum power should 8 dB 4 11 SPURIOUS SIGNALS SPECIFICATION Harmonic signals are down greater than 25 dB and non harmonic spurious signals are down greater than 50 dB from the fundamental output level of 7 dBm DESCRIPTION The output RF signal from the Sweep Oscillator is displayed in frequency domain by a Spectrum Analyzer to verify that the spurious signal output is down from the fundamental frequency output by the specified amount 4 10 86260
76. G 86260A POWER LEVEL sis etter Fully clockwise Set 8620A LINE switch to ON press START pushbutton d Note maximum amplitude from zero Vdc on oscilloscope If it is greater than 25 mV maximum peak trace to place the crystal detector in square law output range Display swept power output trace on oscilloscope Figure 4 10 Select several points trace and calculate VMAX VMIN f Convert VMAX VMIN ratio noted in step e into source match SWR using Figure 4 11 The SWR value should be 2 011 4 15 Performance Tests Model 86260A PERFORMANCE TESTS 4 13 EQUIVALENT SOURCE SWR ZERO VOLT REFERENCE 25 mV MAX Figure 4 10 Typical Pattern of a swept SWR Measurement 4 14 EXTERNAL FM SPECIIFIC FM Mode FM NORM PL switch in FM position tc uten Me ee eat Peg Poet ee 20 MHz V FM switch in PL position Sg dE 6 MHz V Maximum Deviation Modulation Frequencies DG 10 200s 75 MH7 DC to 200 KHZ t 5 MNH7 DESCRIPTION The oscillator is modulated with an external signal source through the input range to 200 kHz The resulting FM deviation is displayed on a spectrum analyzer CRT 4 16 86260 Performance Tests PERFORMANCE TESTS VMAX VMIN SOURCE MATCH SWR Figure 4 11 Graph to Convert Oscilloscope Trace to Source Match SWR 4 17
77. GHz 15 150 GHz 17 950 GHz 12 330 GHz 17 930 GHz 4 23 4 24 11 6625 2917 14 amp P 14 Performance Tests Measured Upper Limit Value 12 450 GHz 15 250 GHz 18 050 GHz 12 470 GHz 18 070 GHz 180 kHz change 180 kHz change 6 MHz change 50 kHz 11 6625 2917 148 14 86260 Adjustments SECTION V ADJUSTMENTS 5 1 INTRODUCTION 5 3 EQUIPMENT REQUIRED 5 2 This section provides adjustment procedures for 5 4 Table 7 3 lists the equipment required for the the Model 86260A RF Plug in These procedures should adjustment procedure If the test equipment not be performed as a routing maintenance procedure recommended is not available other equipment may be but should be used 1 after replacement of a part or used if its performance meets the Critical component 2 when performance tests show that the Specifications listed in the table specifications off Tabla 1 1 cannot be met or 3 when instructed to do so in troubleshooting tree in Section VIII 5 5 FACTORY SELECTED COMPONENTS Before attempting any adjustment allow 30 minutes warmup time for the instrument List of Adjustments 5 6 Factory selected components can be recognized by by reference designation schematic name and function an asterisk on the schematic diagram range of is given in and the test setup for the values and HP Part Numbers are listed in the adjustment procedure is shown in Figure 5 1 Replaceable Parts List Refer
78. HP 8470A Option 012 Spectrum Analyzer essent HP 8555 8552 141 OscilloSCcODe cocci rice iret brat eere pibe ce e HP 180 1801 1820 Directional Coupler even didus HP 779D 10 dB 5 2590 eri ere ti HP 8491B Option 010 PROCEDURE a Connect spectrum analyzer as shown in Figure 4 10 b Set controls as follows 8620A BAND 12 4 to 18 0 GHz CW p xm 15 2 GHz START POMC D 12 4 STOP us 18 0 2 D OFF RF BLANKING OFF Rear RF BLANKING 1 KHZ SQ WV OFF Rear Panel OFF 86260A POWER LEVEL rrt Pra nera Maximum Leveled Power o EXT 86260 PERFORMANCE TESTS 4 15 INTERNAL AND EXTERNAL AM Cont d Press CW pushbutton Set spectrum analyzer controls as follows 8555A Frequency 44 44440 4 BANDWIDTH SCAN WIDTH INPUT ATTENUATION TUNING STABILIZER Signal Identifier 8552A SCAN TIME LOG REF LEVEL LOG LINEAR VIDEO FILTER SCAN MODE External AM Sensitivity Checks TM 11 6625 2917 14 amp P 14 Performance Tests e Note signal level of funda
79. ION Change fundamental output level to 10 dBm step b Change 86260A POWER LEVEL control setting to 10 dBm Change Maximum Leveled Power Option 001 specification for entries on pages 1 5 4 6 and 4 23 to 9 dBm step Change power meter indication in fourth line gt 9 dBm Delete Fifth line Change Maximum Leveled Power Option 001 specification for entries on pages 1 5 4 6 and 4 23 to 9 dBm Page 13 1 13 1 Delete entire page 7 9 86260 86260 8 Change A1C14 Number to 0180 0553 and value to 22UF Page 8 13 Figure 8 14 SERVICE SHEET 1 Change 1 14 value to 22UF CHANGES 6 7 Table 6 2 Change A3R4 to HP and Mfr Part Number 0757 0278 R MET FLM 1 78K OHM 1 1 8W Page 8 17 Figure 8 18 Change value of to 1780 ohms CHANGE 10 Page 6 6 Table 6 2 Change 1 to HP and Mfr Part Number 0160 0303 POLYE 0 15 200V Mfr Code 28480 Change 5 to HP and Mfr Part Number 0160 0154 C POLYE 2200 PF 200V Mfr Code 28480 Page 6 7 Table 6 2 Change A3R7 to HP and Mfr Part Number 0757 0464 MET FLM 90 9K OHM 1 1 8W Change A3R14 to HP and Mfr Part Number 0757 0458 MET FLM 51 1K OHM 1 1 8W Change value of A3CI to 0 15 uF Change value of A3C5 to 2200 Pf Change value of A3R7 to 90 9K Change value of 14 to 51 1K 7 10 86260 86260 90012 ALC SWITCH S2
80. Information Table 1 3 Recommended Test Equipment 2 of 2 Instrument Critical Specifications Recommended Model Sweep Oscillator Only Substitute 8620B HP 8620A BNC Tee Connectors BNC jack and plug HP 1250 0781 10 dB Attenuator SWR 1 3 HP 8491B Option 010 Attenuation 10 dB 0 5 dB RF Service Cable Impedance 50 ohms HP 8120 1578 Connectors SMA to SMA RF Connector Adapter SMA Jack to SMA Jack HP 1250 1158 Extender Board Connector 2 x 15 HP 5060 0049 Wrench 5 16 in Box End Open End HP 08555 20097 Extender Cable Connectors 2 x 18 HP 08620 60032 20 cm Air Lines 2 APC 7 Connectors HP 11567A Adapter APC 7 to N Male HP 11525A A Adjustment P Performance Test T Troubleshooting These parts are included in Service Kit 08620 60030 1 9 11 6625 2917 148 14 General Information Model 86260A Extender Cable 08620 60032 RF service cable 8120 1578 Wrench 5 16 slotted box end open end 08555 20097 Adapter type N to SMA 1250 1404 RF connector adapter 2 SMA jack to SMA jack 1250 1158 Cable SMA connectors PIN Modulator bypass 86260 20009 15 contact extender board 5060 0049 Included in Service Kit HP Part Number 08620 60030 Figure 1 4 Service Accessories for the 86260A 1 10 86260 11 6625 2917 148 14 Installation SECTION II INSTALLATION 2 1 INTRODUCTION 2 2 This section provides installation instructions for the Model 86260A RF Plug in and i
81. LAMP DRIVER anms G 02 NV 1854 0071 CR25 FRONT PANEL READ ONLY MEMORY DIODE CRYCR DECODER 107713 14 Figure 9 7 2 ALC Assembly Schematic 9 11 Option 001 Model 86260A A1R3 A2R17 A2TP3 LOW 2 1 A2TP2 SLOPE 1 4 GND 2 4 A2TP6 2 5 252 431 432 2829 OFFSET A1R43 BIAS LIMIT 7 5 2 4 1 6 1 1 2 1 _ AIFI AITPG A1R34 GND H1 GND BIAS LEVEL Figure 9 8 Location of Adjustments and Test Points Top View Option 001 HEAT SINK A4 Figure 9 9 Location of Major Assemblies Left Side view Option 001 9 12 86260 Option 001 Figure 9 10 Location of Major Assemblies Top View Option 001 HEAT SINK HEAT SINK A7 W6 WA Figure 9 11 Location of Major Assemblies Bottom View Option 001 9 13 9 14 86260 Option 004 SECTION OPTION 004 REAR PANEL OUTPUT 10 1 INTRODUCTION 10 2 components used in the HP Model 86260A Option 004 are listed in the standard 86260A Operating and Service Manual This supplement provides illustrations and additional information pertinent to the Option 004 10 3 DESCRIPTION 10 4 Model 86260A Option 004 provides the RF Outp
82. LANEOUS HEAT SINK BIAS GUIDE PC 80ARD BROWN GUIDE PC BOARD RED GUIDE PC BOARD ORANGE BUSHING PANEL OPTION 004 PIN HINGE 4418 PANEL CLIP MOLDED PLASTIC BLK WIREFORM SPRING DRAWER LATCH BRACKET HEAT SINK PLUG NYLON 0 125 DIA HOLE BRACKET ISOLATOR PLUG HOLE HEAT SINK OSCILLATOR PLATE SERIAL SER CPT SPRING GROUND FRAME DRAWER REAR CONNECTOR ASSY OUTPUT PANEL FRONT UPPER PANEL FRONT LOWER FRAME LEFT SIDE DECK MAIN BRACKET BOARD SUPPORT SHIELD TRANSISTOR BRACE DRAWER Mfr Code 28480 28480 28480 28480 28480 28480 28480 28480 00000 28480 00000 28480 28480 28480 28480 28490 28430 28480 28480 28480 28480 28480 28480 Model 86260A Mfr Part Number 86260 00003 0403 0153 0403 0154 0403 0155 86260 20008 1400 0825 1460 1186 86260 00006 OBD 86260 00010 OBD 86260 20004 7120 2359 08621 00006 08621 20002 08640 60103 86260 00001 86260 00002 86260 00004 86260 0 0005 86260 00007 86260 00011 86260 00012 86260 Replaceable Parts fU E Reference HP Part Qty Description Mfr Mfr Part Number Designation Number Code J2MPI 1250 1577 1 Body RF Connector Type N 28480 1250 1577 J2MP2 1250 0915 1 Contact RF Connector Type N 02660 131 149 J2MP3 5040 0306 1 Insulator 28480 5040 0306 J2MP4 08555 20093 1 Center Conductor 28480 08555 20093 J2MP5 08555 20094 1 Body Bulkhead 28480 08555 20094 J2MP6 219
83. N Adjust ALC Leveling Amplifier to provide a zero to 5 mV output DC DIGITAL VOLTMETER OSCILLOSCOPE BNC TEE SWEEP OUTPUT Figure 5 3 Leveling Amplifier Offset Adjustment Setup EQUIPMENT sweep 8620 86260 Digital Voltmeter 3460 rimum 180 1801 1820 11 6625 2917 14 amp P 14 Adjustments Model 86260A ADJUSTMENTS 5 15 LEVELING AMPLIFIER OFFSET ADJUSTMENT Cont d PROCEDURE a Connect digital voltmeter to A2TP5 b Set 8620A controls as follows G 0 1 0 01 SWEEP TIME Fully clockwise BLANKING ORF RF BLANKING C Set 86260A controls as follows LIES ON EE EXT IEG ENS Fully clockwise d Adjust POWER LEVEL fully clockwise and then rotate counterclockwise to point where UNLEVELED lamp just goes off e Reduce ALC GAIN so blanking overshoot disappears If no overshoot appears leave GAIN at maximum f Adjust polarity switch 251 and power meter switch 252 431 432 for a combination that develops highest positive voltage at A2TP5 g Adjust OFFSET A2R20 for a zero to 5 mV A2TP5 5 8 86260 Replaceable Parts SECTION VI REPLACEABLE PARTS 6 1 INT
84. OR RF PLUG IN OSCILLOSCOPE XT ORIZ O per MAIN LINE 10 48 ATTENUATOR 5 DIRECTIONAL DETECTOR COUPLER THERMI STOR T MOUNT BNC TEE 5 Figure 4 6 Power Meter Leveling Test Setup h Set controls as follows 8620A BAND a d a 12 4 to 18 0 GH START DE ce 12 4 polhter 15 2 STOP DOING PERRA 18 0 GH MODE Mec eee eee ieee AUTO TRIGGER eel ita win edere te ee ails INT eet bte ende reete tin eh hed 100 10 1 KHZ SQ WV OFF Rear Panel OFF RF BLANKING OFF Rear OFF 86260A EET ON POWER LEVEL 280 reti dag ec euet dg e eue Tos Fully clockwise NOTE Power meter switch 252 must be set to 432 431 depending on power meter used For power meter leveling sweep rates slower than 10 sec per sweep must be used The rate of leveling is dependent on the comparatively slow response of the thermistor mount to power level changes i Press 8620A LINE switch to ON Press 8620A START pushbutton Set power meter range to obtain a meter indication in upper half of scale Adjust 86260A POWER LEVEL to obtain flat RF power level across the band as indicated on power meter 4 9 Performance Tests Model 86260A PERFORMANCE TESTS 4 10 POWER LEVEL AN
85. OWER LEVEL AND VARIATION SPECIFICATION Maximum leveled power 12 4 to 18 0 GHz gt 7 dBm 5 0 mW Power Variation At Maximum Leveled Power Externally leveled by crystal detector lt 0 1 dB1 excluding crystal detector and directional coupler frequency response Externally leveled by power meter lt 0 1 dB excluding thermistor mount frequency response Sweep time at least 10 seconds Works with 4318 431C and 432A Power Meters Unleveled lt 4 dB1 Example 3 dB variation means 6 peak to peak total variation 4 6 86260 Performance Tests PERFORMANCE TESTS 4 10 POWER LEVEL AND VARIATION Cont d DESCRIPTION Maximum leveled power is checked with crystal detector leveling and power meter leveling The power output specification is stated for the output of the unit with no options installed In each mode the power variations are measured on the oscilloscope trace The trace is calibrated by changing the RF output power by the amount of the specification as noted on the power meter and the corresponding change in trace on the oscilloscope OSCILLOSCOPE SWEEP OSCILLATOR RF PLUG IN POWER METER 2 AXIS MARKER AND BLANKING DETECTOR 10 dB COUPLED ATTENUATOR D MAIN LINE input DIRECTIONAL COUPLER THERMI STOR MOUNT Figure 4 5 Crystal Detector Leveling Test Setup NOTE The following list includes equipment used in Figures 4 5 and 4 6ltest setups
86. Option 001 and Add the Partial Block Diagram Option 001 in Figure 9 4 Add Figure 9 5 ES Replace Figure 8 8 with aures Town Figure 9 8 Replace Figure 8 21 with Figure 9 11 Option 001 A4 YIG TUNED A5 ISOLATOR PIN A6 DIRECTIONAL OSCILLATOR MODULATOR ASSEMBLY COUPLER a gt 15 OLATOR ISOLATOR RF OUTPUT AT DETECTOR FROM XA2 A TO 2 13 Figure 9 4 Partial Block Diagram Option 001 9 9 Model 86260A Option 001 5 SOLATOR PIN A6 DIRECTIONAL MODULATOR ASSEMBLY COUPLER ASSEMBLY MODULATOR Mul lt lt 4 gt gt gt gt a TOS EJ DETECTOR E A2 ALC ASSEMBLY LEVELING 001 AMPLIFIER u2 poco Figure 9 5 A1 YIG Driver Assembly Schematic Option 001 9 10 86260 1 CRYSTAL POLARITY OFFSET MP2 Figure 9 6 A2 ALC Assembly Components Location Option 001 NERA NOTES Option 001 MAINFRAME A2 ALC ASSEMBLY 86260 60021 NOTE 1 70 382608 uin nix Pe DAR 1 REFERENCE DESIGNA 4 PIN 17 V IS CON 7 SUMMING AMPLIFIER CRI EXTERNAL AM REFERENCE R25 22 i TIONS WITHIN this NECTED TO PIN 5 AND E BLANKING gt ASSEMBLY THROUGH 1 MARKER 808 N AMPLIFIER AMPLIFIER
87. Option 010 Directional Coupler Thermistor Mount HP 8478B The HP 779D Directional Coupler is used for this procedure but the directivity at the upper frequencies 12 4 18 GHz is reduced to about 15 dB PROCEDURE Connect equipment as shown in test setup in The ALC Polarity switch is set for negative output crystal detectors at the factory If a positive output detector is used resetting of detector polarity switch is necessary Figure 3 7 External Crystal Detector Leveling 1 of 2 3 8 11 6625 2917 148 14 86260 Operation CRYSTAL LEVELING Set controls as follows 8620A START green 1 STOP red 7 MARKER 15 TIME SECONDS 1 an 0 1 0 01 TIME SECONDS Vernier 13 Fully clockwise 1 KHZ SQ WV OFF Rear Panel RF BLANKING OFF Rear Panel RF BLANKING 86260A POWER LEVEL 10 Fully clockwise ALC GAIN 11 Fully clockwise Press 8620A LINE pushbutton switch 19 to turn instrument on The LINE switch 19 and START STOP pushbuttons 1 7 should be light indicating START STOP sweep mode is selected Adjust ALC GAIN 11 and POWER LEVEL 10 controls fully clockwise for maximum RF power and maximum external preamplifier gain of the conditions shown in Figure 3 4 through 3 6 should be displayed on oscilloscope If trace is unleveled as shown in Figure 3 4 just partially leveled and UNLEVELED light is on turn POWER LEVEL 10 control counterclockwise to red
88. PIN MODULATOR a OO n aT di 38 p EN D 0 0 29 a2 R33 1210 AF N os an 182 43V to ecd 215K 853 2 12 1000 m R45 US 0461 4 847 RF OUT ca 10v 1 1000 15 5 200K 0 11 O 5 FN V LAMP 1 LL RS OFFSET 1864 0071 R48 1 22 wie ae 3 015v ana i 821 ca H o 1000 1000 215 1 A Za saav 1963 0020 R18 2 gt gt D X825 45V u 100 V Dk 422K sv o Wes haav 281 07 178K UNLEVELED 1965 0091 R53 4 oe 5 20 178 CR15 m 123456 101112131415 1 V V Joo fi 000000000000000 O 0 913 R Q3 1 3 UN on 2 SEE NOTE 3 FOR 22uF R51 1854 0071 1 900000000000000 VOLTAGE CONDITIONS 21 5K 1 ABCDEFHJKLMNPRS 1 w mK 9 V 20 4 lt e 4 PORE as teeth lt ie e Ag 62004 A2 ALC BOARD SERIAL PREFIX 1608A Figure 8 16 A2 ALC Assembly Component Locations 8 15 86260 Service SERVICE SHEET 3 A3 FM Assembly Circuit Description GENERAL The A3 FM Assembly contains FM Driver and Lo Freq FM Amplifier circuitry that provide frequency modulated RF output for the 86260A The FM Driver consists of Q 1 2 Q3 and Q4 and the Lo Freq Amplifier consists of U1 External FM signals a
89. R 1KHz lt i SQUARE i WAVE ze _ Figure 8 12 Troubleshooting Block Diagram 8 11 ISOLATOR CONTROL NOTES 1 REFERENCE DESIGNA TIONS WITHIN THIS ASSEMBLY ARE ABBRE VIATED ADD ASSEM NUMBER TO BREVIATION FOR COM PLETE DESCRIPTION 2 UNLESS OTHERWISE IN DICATED RESISTANCE IN OHMS CAPACITANCE PICOFARADS Service SERVICE SHEET 2 A2 ALC Assembly Circuit Description GENERAL The A2 Automatic Leveling Control ALC Assembly contains circuitry to provide leveled RF output power Leveling is accomplished by sampling the RF output power with a crystal detector or a power meter and supplying a proportional dc voltage to the ALC EXT INPUT connector This ALC feedback voltage is amplified by PRE AMPLIFIER U2 and then applied to the ALC Amplifier where it is summed with the reference voltage established by the front panel POWER LEVEL setting To compensate for different feedback levels crystal detector 25mV to 250mV power meter 0 1 0V front panel ALC GAIN control is provided The Modulator Driver emitter follower Q8 and Q9 provide the necessary current to drive the PIN Modulator A front panel indicator UNLEVELED Lamp DS 1 will light when the power level is set to high to maintain leveling Lamp DS1 is driven by Lamp Driver circuitry Q10 and 11 which triggers from the PIN Modulator bias voltage External AM signals are amplified by EXT
90. RODUCTION 6 2 This section contains information for ordering parts lists abbreviations used in the parts list and throughout the manual Table 6 2 lists all replaceable parts in reference designator order is the PART NUMBER NATIONAL STOCK NUMBER CROSS REFERENCE INDEX 6 3 ABBREVIATIONS 6 4 Table 6 1 gives a list of abbreviations used in the parts list schematics and throughout the manual In some cases two forms of the abbreviation are given one is in capital letters and one is partial or no capitals This occurs because in the parts list abbreviations are all capitals However in the schematics and other parts of the manual other abbreviation forms are used with both lower case and upper case letters 6 5 REPLACEABLE PARTS LIST 6 6 Table 6 2lis the list of replaceable parts and is organized as follows a Electrical assemblies and their components in aloha numerical order by reference designation b Chassis mounted parts in alpha numeric order by reference designation c Miscellaneous parts d Illustrated parts breakdown if appropriate The following information given for each part consists of the following a Hewlett Packard part number b The total quantity QTY in the instrument c The description of the part d The typical manufacturer of the part in a five digit code e Manufacturer part number The total quantity for each part is given only once at the first appearanc
91. SA Dep 1 HISA Ft Monrnouth 21 Sig Sec USA Dep 1 Armies 1 Units org under fol TOE USASIGS 10 29 207 2 Svc Colleges 1 29 610 2 Ft Richardson CERCOM Ofc 1 29 134 1 Ft Carson 5 29 136 1 Ft Gillem 10 NG None USAR None For explanation of abbreviations used see AR 310 50 RECOMMENDED CHANGES EQUIPMENT TECHNICAL PUBLICATIONS SOMETHING WRONG wire ms FROM PRINT YOUR UNITS COMPLETE ADDRESS THEN JOT DOWN THE DOPE ABOUT ON THIS FORM CAREFULLY TEAR IT OUT FOLD IT AND DROP IT IN THE MAIL pu NUMBER PUBLICATIONDATE BE EXACT PIN POINT pei IT tS oS 2028 2 PREVIOUS EDITIONS 5 YOUR OUTFIT WANTS TO KNOW ABOUT YOUR SARE OBSOLETE RECOMMENDATION MAKE A CARBON COPY OF THIS AND GIVE TO YOUR HEADQUARTERS IN THIS SPACE TELL WHAT i WRONG ANO WHAT SHOULD BE DONE ABOUT IT m A D CHAS a GD E me ase une ALONG PERFORATED UNE omna amam Cone CHINE femme a SD QUAM D DEPARTMENT OF THE ARMY US ARMY AG PUBLICATIONS CENTER POSTAGE AND FEES PAID 1655 WOODSON ROAD DEPARTMENT OF THE ARMY ST LOUIS MISSOURI 63114 DOD 314 OFFICIAL BUSINESS PENALTY FOR PRIVATE USE 300 PIN 048006 000 KAXL s This manual is provided FREE OF CHARGE from the BoatAnchor Manual Archive as a service to
92. SILICON 100MA IV 07263 FD 2387 A2CR2 1901 0025 DIODE SILICON 100MA IV 07263 FD 2387 A2CR3 1901 0025 DIOOE SILICON IOOMA IV 07263 FD 2387 A2CR4 1901 0376 4 DIODE SILICON 35V 28480 1901 0376 A2CR5 1901 0376 DIODE SILICON 35V 28480 1901 0376 A2CR6 1901 0040 9 DIODE SILICON 30MA 30WV 07263 FDG1088 A2CR7 1901 0535 5 DIODE HYBRID HOT CARRIER 28480 1901 0535 A2CR8 1901 0535 DIODE HYBRID HOT CARRIER 28480 1901 0535 A2CR9 1901 0535 DIODE HYBRID HOT CARRIER 28480 1901 0535 A2CR10 1901 0040 DIODE SILICON 30MA 30WV 07263 FDG1088 A2CR11 1901 0040 DIODE SILICON 30MA 30WV 07263 FDG1088 A2CR12 1901 0040 DIODE SILICON 30MA 30WV 07263 FDG1088 A2CR13 1901 0040 DIODE SILICCN 30MA 30WV 07263 FDG1088 A2CR14 1901 0040 DIODE SILICON 30MA 30WV 07263 FDG1088 A2CR15 1901 0040 DIODE SILICON 30MA 30WV 07263 FDG1088 A2CR16 1901 0535 DIODE HYBRID HOT CARRIER 28480 1901 0535 A2CR17 1901 0376 DIODE SILICON 35V 25480 1901 0376 A2CR18 1901 0376 DIODE SILICON 35V 28480 1901 0376 A2CR19 1901 0535 DIODE HYBRID HOT CARRIER 28480 1901 0535 A2CR20 1901 0040 DIODE SILICON 30MA 30WV 07263 FDG1088 A2CR21 1910 0016 2 DIODE GERMANIUM 100MA 0 85V 60PIV 93332 D2361 A2CR22 1910 0016 DIODE GERMANIUM 100 0 85 60PIV 93332 D2361 A2MP1 4040 0750 2 EXTRACTOR PC BOARD RED 28480 4040 0750 A2MP2 4040 0750 EXTRACTOR PC RED 28480 4040 0750 A2Q1 1855 0081 7 TSTR SI FET 8013 2N5245 A2Q2 1854 0071 TSTR SI NPN SELECTED FROM 2N3704 28480 1854 0071 A2Q3 1855 0081 TSTR SI FET 8013 2N5245 A2Q4 185
93. Step a should be less than 180 kHz C Set line voltage to 127 Vac with adjustable line transformer The frequency change from that noted in Step a should be less than 180 kHz Return line voltage to 115 Vac Frequency Change With Line Voltage Change d Set POWER LEVEL to specified maximum power and note frequency indication on the counter With POWER LEVEL control decrease power by 10 dB as indicated on power meter The frequency change should be less than 6 MHz 4 9 RESIDUAL FM IN 10 KHZ BANDWIDTH SPECIFICATION Residual FM in CW mode measured in a 10 kHz bandwidth 25 kHz peak 86260A FM NORM PL switch in NORM position DESCRIPTION The sweep oscillator RF output signal is displayed on a Spectrum Analyzer The residual FM is observed on a storage display by displaying five superimposed traces 4 4 86260 Performance Tests PERFORMANCE TESTS 4 9 RESIDUAL FM IN 10 KHZ BANDWIDTH SPECTRUM ANALYZER SWEEP OSCILLATOR RF PLUG IN RF INPUT OUTPUT 10 dB ATTENUATOR Figure 4 3 Residual FM Test Setup EQUIPMENT Sweep deese Eae de eae HP 8620A 86260 10 dB 84918 Option 010 Spectrum 8555 8552 141 PROCEDURE a Connect equipment as shown in Set controls as follows 8620A BAND 12 4 to 18 0 GHz eu Mim
94. THIN IIS REFERENCE DESIGNATIONS 22 ASSEMBLY ABBRE VIATED ADO ASSEM CRI 1 lt 44 AN ABBREVIATION FOR ING t A COMPLETE DESCRIP MARKEN 35 1 ai 2 UNLESS OTHERWISE 12 INDICATED RESISTANCE IN OHMS CAPACITANCE IN 1 2 1 BLY NUMBER TO i lt 6 WAVE i i 1 i 1 T 1 1 i PICOFARADS t 1 3 VOLTAGES TAKEN IN R16 17 1 EXTERNAL ALC MODE EXT AM 5 ELT r ALC AMPLIFIER MAXIMUM LEVELED 1 0 07 MIN POWER TOWER Iu t bs 1 8V MAX POWER 1 H 1 GNDHI 1 1 C9 CURRENT f 1 rg 1 i V i EXTERNAL ES REFERENCE V MN i AMPUFIER ALG PREAMPLIFIER 1 lt lt Fm 28 CA7 CRE 1000 1 rasv 1 1 D P 201234 CIRCUIT BOARD Ks x D 224 R24 VIEW TOP VIEW 3160 5 i R3 MODULATOR lt 10K cig DRIVER E Qr 1 3V MIN POWER 7 EXT MTR SWITCH 07V MAX POWER 1 CRYSTAL DETECTOR WV V 1 4 POLARITY 12 10v TAE CIS 13 MIN POWER 246 1854 LI 1 1 EM Si m st 9 2001 1000 2 O am OTV POWER 1000 fS 22 P O ABISOLATOR v2 29 D 10K XA2
95. V 50NA 00 7 28480 1901 0376 A2CR13 1901 0033 DIODE GEN PRP 180V 200NA DO 7 28480 1901 0033 A2CR14 1901 0033 DIODE GEN PRP 180V 200NA DO 7 28480 1901 0033 A2CR15 1901 0033 DIODE GEN PRP 180V 200NA DO 7 28480 1901 0033 A2CR16 1901 0033 DIODE GEN PRP 180V 200NA DO 7 28480 1901 0033 A2CR17 1901 0033 DIODE GEN PRP 180V 200NA DO 7 28480 1901 0033 A2CR18 1901 0040 6 DIODE SWITCHING 30V 50NA 2NS DO 35 28480 1901 0040 A2CR19 1901 0535 5 DIODE SCHOTTKY 28480 1901 0535 A2CR20 1901 0033 DIODE GEN PRP 180V 200NA DO 7 28480 1901 0033 2 21 1901 0535 DIODE SCHOTTKY 29480 1901 0535 A2CR22 1901 0033 DIODE GEN PRP 180V 200NA DO 7 28480 1901 0033 A2CR23 1901 0535 DIODE SCHOTTKY 28480 1901 0535 A2CR24 1901 0033 DIODE GEN PRP 180V 200NA DO 7 28480 1901 0033 A2CR25 1901 0040 DIODE SWITCHING 30V 50NA 2NS DO 35 28480 1901 0040 A2CR26 1901 0040 DIODE SWITCHiNG 30V 50NA 2 5 DO 35 28480 1901 0040 A2CR27 1901 0040 DIODE SWITCHING 30V 50NA 2NS DO 35 28480 1901 0040 A2CR28 1901 0040 DIODE SWITCHING 30V 50NA 2NS DO 35 28480 1901 0040 A2CR29 1901 0040 DIODE SWITCHING 30V 50NA 2NS DO 35 28480 1901 0340 A2CR30 1901 0033 DIODE GEN PRP 180V 200NA DO 7 28480 1901 0033 A2CR31 1901 0033 DIODE GEN PRP 180V 200NA DO 7 28480 1901 0033 A2CR32 1961 0535 DIODE SCHOTTKY 28480 1901 0535 A2CR33 1901 0376 OlOmE GEN PRP 35V 50NA DO 7 28480 1901 037n A2CR34 1901 0535 DIODE SCHOTTKY 28a80 1901 0535 A2CR35 1901 0376 DIODE GEN PRP 35V 50 DO 7 28480 1901 0375 A2CR36 1901 0033 DIODE GEN PRP 180V 2
96. accessible from inside mainframe NOTE If necessary to remove frequency scale exert a pressure OUTWARD away from drum on right hand edge of scale 2 2 TM 11 6625 2917 14 amp P 14 Model 86260A d Insert frequency scale so key 1 2 inch protrusion fits into notch on left hand side of drum Then exert inward pressure on right hand edge of frequency scale to snap it in place e Return front panel to upright position and re engage front panel latch handle 2 18 Stationary Front Panel To install a frequency scale in a mainframe with a stationary front panel proceed as follows a Select correct scale See b Turn off instrument and remove 8620A B top cover With the top cover removed terminals are exposed that have AC voltages capable of causing death Remove the AC line cord from the 8620A B before continuing c Depress BAND lever until desired drum position is accessible from inside mainframe NOTE If necessary to remove frequency scale exert a pressure OUTWARD away from drum on right hand edge of scale d Insert frequency scale so key 1 2 inch protrusion fits into notch on left hand side of drum Then exert inward pressure on right hand edge of frequency scale to snap it in place 2 19 STORAGE AND SHIPMENT 2 20 Environment 2 21 The instrument may be stored or shipped in environments A within the following limits Temperature 40 C to t75 C Up to 9
97. aceable Parts Model 86260A FACTORY SELECTED PART SELECT QTY OF ONE See introd io this section for orderir 9 information Reference HP Part Qty Description Mfr Mfr Part Number Designation Number Code 1 86260 60035 1 BOARD ASSY YIG DRIVER INCLUDES ALL A1CR5 28480 86260 60034 VALUES SEE PARAGRAPH 5 13 1 1 0160 3460 1 0 05 UF 80 20 100DCW 56289 C023E401L503ZS22 CDM A1C2 0160 0127 5 C FXD CER 1 0 UF 20 25VDCW 56289 5C13CS CML A1C3 0160 3450 1 C FXD 5000 PF 10 250VDCW 56289 C067B251H502KS25 CDH 1 4 0180 0228 2 C FXD ELECT 22 UF 10 15VDCW 56289 150D226x9015B2 DYS A1C5 0180 0228 C FXD ELECT 22 UF 10 15DCW 56289 150D226X90115B2 DYS A1C6 0160 2199 3 C FXD CER30 PF 5 500VDCW 28480 0160 2199 A1C7 0160 2204 C FXD CER 100 PF 5 300 VDCW 28480 0160 2204 A1C8 0160 3459 2 C FXD CER 0 02 UF 20 100VDCW 56289 CO023F101H203MS22CDH A1C9 0160 2055 C FXD CER 0 01 UF 80 2096 100VDCW 56289 023 10 1032522 1 10 0180 0374 3 C FXD TANT 10 UF 10 20VDCW 56289 150D106X9020B2 DYS 1 11 0180 2486 C FXD TANT 470 UF 20 30VDCW 28480 0180 2486 1 12 0180 2486 C FXD TANT 470 UF 20 30VDCW 28480 0180 2486 A1C13 0180 0094 1 C FXD ELECT 100 UF 475 1096 25VDCW 56289 30D107G025DD2 DSM A1C14 0180 1746 1 C FXD ELECT 15 UF 10 20VDCW 28480 0180 1746 A1CR1 1901 0025 5 DIODE SILICON 100MA 1V 07263 FD 2387 A1CR2 1902 0041 1 DIODE BREAKDOWN 5 11V 596 04713 5210939 98 A1CR3 1902 3193
98. ads are the same strength and the cathode is designated by a white dot Push 051 into mounting clip until it snaps into place d Install retainer ring around mounting clip Figure 8 7 UNLEVELED Lamp Removal and Replacement Procedure 8 4 86260 Test point symbols Stars numbered or lettered for easy correlation of schematic diagrams procedures and locator illustrations Arrow connecting star to meas urement point signifies no measuring aid provided Star shown electrically con nected to circuit signifies meas uring aid metal post circuit pad etc provided Service Interconnection information Circled letter indicates circuit path continues on another schematic diagram Look for same circled letter on service sheet indicated by adjacent Assembly part number Assembly name Assembly designation Stage name 3 Wire color code Code used MIL STD 681 is the same as the resistor color code First number iden tifies the base color second number the wider stripe and the third number the narrower stripe Example 4 SERIES REGULATOR gt 2550 Circuit board common Conducting connection to chassis or frame Value selected for best operation Value shown is average or most commonly selected value denotes white base yellow wide stripe violet narrow stripe A2 DC REGULATOR ASSY 1
99. agram Option 001 004 in Add Figure 11 3 Page 8 19 Add Figure 9 6 Add Figure 11 4 to Figure 9 7 Replace Figure 8 8 Figure 9 7 Page 8 19 Replace Figure 8 10 Figure 9 8 Add Figure 11 5 Replace Figure 8 11 with Figure 11 6 Replace Figure 8 12 With Figure 11 7 11 3 Model 86260 Option 001 004 4 YIG TUNED A5 ISOLATOR PIN A6 DIRECTIONAL OSCILLATOR MODULATOR ASSEMBLY COUPLER ISOLATOR MODULATOR ISOLATOR Q 1 CONTROL DETECTOR TO XA2 13 Figure 11 2 Partial Block Diagram Option 001 004 5 ISOLATOR PIN A6 DIRECTIONAL MODULATOR ASSEMBLY COUPLER ASSEMBLY MODULATOR aly is al our 7 DETECTOR ASSEMBLY A2 ALC ASSEMBLY 1 001 LEVELING AMPLIFIER y2 Figure 11 3 Al YIG Driver Assembly Schematic Option 001 004 11 4 Model 86260 Option 001 004 P O 5 SOLATOR DIRECTIONAL PIN MODULATOR COUPLER 0955 0061 XA2 Ji x GD e W7 16 INPUT FROM YIG TUNED OSCILLATOR 4 gt 4 01 W7 A3 w5 A2 1 w5 A5 W3 4 Figure 11 5 Location of Major Assemblies Left Side View Option 001 004 11 5 Model 86260 Option 001 004 01 HEATSINK HEAT SINK Figure 11 6 Location of Major Assemblies Top View Option 001 004 HEAT SINK M Figure 11 7 Location of Major Assemblies Bottom View Option 001 00
100. ain Too High External Crystal Detector Leveling 3 8 Power Meter Leveling 3 10 Frequency Range and Accuracy Test Setup 1 42 Frequency Stability Test Setup 4 3 Residual FM Test Setup 4 5 Residual FM Displayed on Spectrum Analyzer Crystal Detector Leveling Test 4 7 Power Meter Leveling 1 49 Spurious Signal Test Setup 4 11 Residual AM Test Setup 4 13 Equivalent Source Match Test Setup 4 14 Typical Pattern of a Swept SWR Graph to Convert Oscilloscope Trace to Source Match SWR 4 17 External Frequency Modulation Test Spectrum Analyzer Display of Frequency Deviation 4 19 Amplitude Modulation Test Setup 4 20 Oscillator Bias Adjustment Setup 5 2 ER e D gt EN A L TM 11 6625 2917 14 amp P 14 Contents Frequency Adjustment Setup 5 6 Leveling Amplifier Offset Adjustment Setup 5 7 RF Output Connector J
101. ames and addresses Page 6 11 Paragraph 6 4 Table 6 2 Table 6 1 Paragraph 6 6 Change Table 6 3 to Table 6 2 Page 6 4 Table 6 21 Change A1Q4 and A1Q5 to HP and Mfr Part Number 1853 0451 TRANSISTOR PNP 2N3799 Change AICR6 to HP and Mfr Part Number 1901 0743 DIODE PWR RECT 1N4004 400V IA DO41 RECOMMENDED REPLACEMENT 6 5 6 21 Change 208 to HP Mfr Number 1853 0451 TRANSISTOR PNP 233799 RECOMMENDED REPLACEMENT 6 6 Table 6 21 Change A3CR2 to HP and Mfr Part Number 1901 0743 DIODE PWR RECT 1N4004 400V 1A DO 41 6 7 Table 6 2 Change J2 to HP and Mfr Part Number 86290 60005 7 4 86260 86260 90012 ERRATA Cont d Change J2MPI to HP and Part Number 1250 1577 Mfr Code 28480 Page 6 10 Change item 29 PANEL SUB to HP and Mfr Part Number 86260 00037 Page 8 13 Figure 8 14 Change Q4 and Q5 to Part Number 1853 0451 Add connection from junction of resistors R9 and R15 to UI pin 2 Page 8 15 Figure 8 16 Change Q8 to Part Number 1853 0451 Page 9 ll Table 9 1 Change A2Q4 and A2Q5 to HP and Mfr Part Number 1853 0451 TRANSISTOR PNP 2N3799 able 9 1 Change A2R26 entry to 0757 0199 RESISTOR 21 5K 1 125W TC 0 100 42546 C4 1 8 TO 2152 F Change Q8 and Q17 HP Part Numbers to 1855 0081 Add arrows pointing in on gates of all FETs Add switch contact detail and wiring diagram shown in Figure aot this Manual Cha
102. ate 18 000 GHz 70 MHz 4 8 FREQUENCY STABILITY SPECIFICATION Frequency Stability With 10 7c change in line voltage 180 kHz With 10 dB power level change from specified maximum power 6 MHz DESCRIPTION Frequency is measured for change due to line voltage and power level changes SWEEP OSCILLATOR RF PLUG IN ADJUSTABLE AC LINE TRAN SFORMER FREQUENCY COUNTER MAIN LINE OUTPUT DIRECTIONAL COUPLER POWER METER coupLeo QJ THERAM STOR 10 dB MOUNT ATTENUATOR pP Figure 4 2 Frequency Stability Test Setup 4 3 Performance Tests Model 86260A PERFORMANCE TESTS 4 8 FREQUENCY STABILITY Cont d EQUIPMENT Sweep Oscillator co ctii ethnic cte teh o die bates HP 8620A RE RIGQAIN ners 86260 Frequency 5340 ARE i Ta A EE 432 Thermistor 8478 Directional Coupler iac eet le HP 779D Adjustable AC Line Transformer 2 4 General Radio MT3A T1O0 dB AttenuUaltor icis eter ee Rea cita HP 8491B Option 010 Frequency Change With Line Voltage Change a Record frequency indication on counter at 115 Vac b Set line voltage to 103 Vac with adjustable line transformer The frequency change from that noted in
103. ational Electrotechnical Commission Safety Class instrument This instrument has been designed and tested according to IEC Publication 348 Safety Requirements for Electronic Measuring Apparatus and has been supplied in safe condition 1 11 Service 1 12 Although the instrument has been designed in accordance with international safety standards the information cautions and warnings in this manual must be followed to ensure safe operation and to keep the instrument safe Service and adjustments should be performed only by qualified service personnel 1 13 Adjustment or repair of the opened instrument with the ac power connected should be avoided as much as possible and when inevitable should be General Information performed only by a skilled person who knows the hazard involved 1 14 Capacitors inside the instrument may still be charged even though the instrument has been disconnected from its source of supply 1 15 Whenever it is likely that the protection has been impaired make the instrument inoperative and secure against it any unintended operation Any protective grounding conductor inside or outside the instrument or disconnection of the protective earth terminal is likely to make this instrument dangerous Intentional interruption of the earth ground is prohibited Servicing this instrument often requires that you work with the instrument s protective covers removed and with ac power connec
104. b the original packing material is not available at least protect the unit with protective plastic or paper wrapping Place the unit in a carton or box with makeshift protective packing material around it c Store the equipment indoors protected from elements Maintain the equipment at moderate temperatures and humidity Sed para 2 19 0 6 Destruction of Army Electronics Materiel Destruction of Army electronics materiel to prevent enemy use shall be in accordance with TM 750 244 2 11 6625 2917 14 amp P 14 General Information Model 86260A HP 86260A RF Plug in Scale for 8620A 86260 00008 Scale for 8620B 86260 00009 NOTE See ACCESSORIES SUPPLIED in Section I for part number information Figure 1 1 Model 86260A RF Plug in and Accessories Supplied 1 0 86260 11 6625 2917 148 14 General Information SECTION GENERAL INFORMATION 1 1 INTRODUCTION 1 2 This operating and Service manual contains information required to install operate test adjust and service the Hewlett Packard Model 86260A RF Plug in shows the instrument and accessories supplied This section covers instrument identification description options accessories specifications and other basic information 1 3 This manual is divided into 1 3 sections which provide information as follows SECTION Ij GENERAL INFORMATION contains the instrument description and specifications as well as the acces
105. cified parameters e Align To adjust specified variable elements of an item to bring about optimum or desired performance Calibrate To determine and cause corrections to be made or to be adjusted on instruments or test measuring and diagnostic equipments used in precision measurement Consists of comparisons of two instruments one of which is a certified standard of known accuracy to detect and adjust any discrepancy in the accuracy of the instrument being compared g Install The act of emplacing seating or fixing into position an item part module component or assembly in a manner to allow the proper functioning of the equipment or system Replace The act of substituting a serviceable like type part subassembly or module component assembly for an unserviceable counterpart i Repair application of maintenance services inspect test service adjust align calibrate replace or other maintenance actions welding grinding riveting straightening facing remachining or resurfacing to restore serviceability to an item by correcting specific damage fault malfunction or failure in a part subassembly module component or assembly end item or system j Overhaul That maintenance effort service action necessary to restore an item to a completely serviceable operational condition D 1 prescribed by maintenance standards in appropriate technical publicatio
106. d Set test oscillator frequency to 200 kHz and adjust its AMPLITUDE control clockwise until frequency deviation is 5 MHz 4 18 11 6625 2917 148 14 86260 Performance Tests PERFORMANCE TESTS 4 14 EXTERNAL FM Cont d CENTER FREQUENCY DEVIATIO DEVIATION Figure 4 13 Spectrum Analyzer Display of Frequency Deviation 4 15 INTERNAL AND EXTERNAL AM SPECIFICATION INTERNAL AM 1 kHz squarewave ON OFF ratio gt 25 dB below maximum leveled power EXTERNAL AM Sensitivity A 10 V input reduces the RF output signal 25 dB below maximum leveled power DESCRIPTION Attenuation is checked by applying 10 Vdc and observing the corresponding decrease in RF power out 25 dB below maximum leveled power ON OFF ratio is checked by applying the internal 1 kHz squarewave and observing the display 4 19 11 6625 2917 148 14 Performance Tests Model 86260A PERFORMANCE TESTS 4 15 INTERNAL AND EXTERNAL AM Cont d DC POWER SUPPLY OSCILLATOR RF PLUG IN EXT AM 10 VOLT REAR PANEL ooh OUTPUT OSCILLOSCOPE 77 0 a CRYSTAL 10 dB DETECTOR CRYSTAL DETECTOR DONUM eee EQUIPMENT Sweep 8620 86260 DC Power 721 Crystal Detector 2
107. dback voltage from the power meter to be applied to the ALC Preamplifier In this mode R9 R10 and are used to provide a good match to the power meter output ALC PREAMPLIFIER The ALC Preamplifier U2 utilizes hot carrier diodes CR7 CR8 and CRS 0 3V junction drop in a step function feedback configuration to gain shape the ALC signal Op amp 02 operates in either an inverting or non inverting mode depending upon the setting of the Crystal Detector Polarity switch S1 and the Power Meter switch S2 These switches maintain a negative U2 output for either a positive or negative ALC feedback voltage The gain is controlled by U2 output voltage If the output voltage is less than 0 3 the voltage gain is 63 When the output voltage is between 0 3Vdc and 0 6Vdc hot carrier diode CR7 conducts placing R23 in parallel with feedback resistor R19 resulting in a gain of 15 2 f the output voltage exceeds 0 6Vdc CR8 conducts and if the voltage exceeds 0 9Vdc CR9 conducts This action will place resistors R24 and R25 respectively in parallel with feedback resistor R 9 Stage gain with all diodes conducting is 1 4 ALC AMPLIFIER The reference voltage AM signals and the preamplified feedback voltage are summed at the inverting input of the ALC Amplifier U 1 Clamp diodes CR16 CR17 and CR18 prevent U1 from saturating in the positive direction and diode CR19 prevents saturation in the negative direction Transisto
108. dure The BIAS LEVEL sets the oscillator bias voltage VBIAS VBIAS is critical value which determines the optimum 5 12 For the location of the adjustments refer to Figure operation of the oscillator or the point at 5 11 ADJUSTMENTS LOCATION ADJUSTMENTS 5 13 OSCILLATOR BIAS LEVEL AND BIAS LIMIT ADJUSTMENT REFERENCE Service Sheet i YIG DRIVER ASSEMBLY DESCRIPTION Sets bias voltage V BAS for the YIG tuned oscillator A4 and firing point of protective circuit for the oscillator The required VBIAS is stamped on the oscillator and the firing point is set 0 5 volts more negative than VBI AS NOTE Before beginning these adjustments note the oscillator VBIAS indicated on the oscillator nameplate 0C DIGITAL VOLTMETER SWEEP OSCILLATOR RF PLUG IN Figure 5 1 Oscillator Bias Adjustment Setup 5 2 oot 11 6625 2917 148 14 Model 86260 Adjustments ADJUSTMENTS 5 13 OSCILLATOR BIAS LEVEL AND BIAS LIMIT ADJUSTMENT Cont d EQUIPMENT SWEEP 8620 86260 Digital Voltmeter 3460 The following adjustments factory adjustments for each oscillator The adjustments are made only when 1 an oscillator is replaced 2 the Regulated Bias Supply on is repaired or 3 the bias voltage is out of tolerance with that stamped on the oscillator a Turn off 8620A and remove
109. e 5 9 vi 8 1 Troubleshooting 9 1 Replaceable Number National Stock Number Cross Reference Index 11 6625 2917 148 14 SECTION 0 INTRODUCTION 0 1 Scope This manual describes the Hewlett Packard Model 86260A RF Plug in which is identified throughout this manual as the Model 86260A RF Plug in This manual includes technical data installation operation and maintenance instructions Section VI includes a cross reference between the Hewlett Packard part numbers and the equivalent NATO National Stock Number NSN Appendix A contains list of technical manuals and other publications that pertain to the Model 86260A and to equipments that support it contains the Maintenance Allocation Chart MAC which defines the levels and scope of maintenance functions for the equipment in the Army system 0 2 Indexes of Publications a DA Pam 310 4 Refer to the latest issue of DA Pam 310 4 to determine if there are any new editions changes or additional publications pertaining to the equipment b DA Pam 310 7 Refer to DA Pam 310 7 to deter mine if there are any modification work orders MWO s pertaining to the equipment 0 3 Maintenance Forms Records and Reports a Heports of Maintenance and Unsatisfactory Equipment Department of the Army forms and procedures used for equipment ma
110. e function at the indicated category of maintenance If the number or complexity of the tasks within the listed maintenance function vary at different maintenance categories appropriate work time figures will be shown for each category The number of taskhours specified by the work time figure represents the average time required to restore an item assembly subassembly component module end item or system to a serviceable condition under typical field operating conditions This time includes preparation time troubleshooting time and quality assurance quality control time in addition to the time required to perform the specific tasks identified for the maintenance functions authorized the maintenance allocation chart Subcolumns of column 4 are as follows C Operator Crew O Organizational F Direct Support H General Support D Depot e Column 5 Tools and Equipment Column 5 specifies by code those common tool sets not individual tools and special tools test and support equipment required to perform the designated function Column 6 Remarks Not applicable D 4 Tool and Test Equipment Requirements a Tool or Test Equipment Reference Code The numbers in this column coincide with the numbers used in the tools and equipment column of the MAC The numbers indicate the applicable tool or test equipment for the maintenance functions TM 11 6625 2917 14 amp P 14 b Maintenance Category The codes in this
111. e of the part number in the list 6 7 DELETED Replaceable Parts assembly attenuator isolator termination fan motor battery capacitor coupler diode diode thyristor varactor directional coupler delay line annunciator signaling device audible or visual lamp LED ampere alternating accessory adjustment analog to digital audio frequency automatic control automatic gain control aluminum automatic level amplifier automatic phase beat frequency oscillator binder head breakdown bandpass ceramic channel centimeter cabinet mount only coaxial miscellaneous electrical part hardware circulator electrical connector stationary portion mechanical part ABBREVIATIONS composition complete connector cadmium plate cathode ray tube complementary transistor logic continuous wave clockwise centimeter decibel referred direct current degree temperature interval or differ degree Fahrenheit degree Kelvin deposited carbon detector parts list DIFF AMPL differential amplifier division double pole digital voltmeter emitter electrical connector movable portion plug transistor SCR triode thyristor resistor thermistor switch transformer terminal board thermocouple test point electronic data processing electrolytic encapsulated external flip flop flat head fillister head frequency modula
112. ent System 5 Procedures for Destruction of Electronics Materiel to Prevent Enemy Use Electronics Command A 1 A 2 Blank 11 6625 2917 14 amp 14 APPENDIX 0 MAINTENANCE ALLOCATION Section INTRODUCTION D 1 General This appendix provides a summary of the maintenance operations for the Hewlett Packard Model 86260A RF Plug in It authorizes categories of maintenance for specific maintenance functions on repairable items and components and the tools and equipment required to perform each function This appendix may be used as an aid in planning maintenance operations D 2 Maintenance Function Maintenance functions will be limited to and defined as follows Inspect To determine the serviceability of an item by comparing its physical mechanical and or electrical characteristics with established standards through examination b Test To verify serviceability and to detect incipient failure by measuring the mechanical or electrical characteristics of an item and comparing those characteristics with prescribed standards C Service Operations required periodically to keep an item in proper operating condition i e to clean decontaminate to preserve to drain to paint or to replenish fuel lubricants hydraulic fluids compressed air supplies d Adjust maintain within prescribed limits by bringing into proper or exact position or by setting the operating characteristics to the spe
113. er ON Low RF Power and or CW Frequency changes after cycling RF ON OFF SWITCH Possible Cause 252 Power Meter switch not set to match power meter Incorrect Power meter RECORDER Output Should be 1 V Full scale Defective A2 ALC Assembly Rear panel FM NORM PL switch not in NORM position AIK1CWEilter relay not engaged Defective A1 YIG Driver Assy Noisy Al YIG Driver Assembly DEFECTIVE A1 YIG Driver Assy Defective Al YIG Driver Assembly Defective Reference Resistor R3 chassis mounted Defective A4 YIG Oscillator Assembly CW frequency set below 12 4 GHz Defective 1 YIG Oscillator Check Point 86260A Rear Panel 581 86260 Service Model 86260A 8820A P O A4 YIG TUNED P O A5 ISOLATOR MAINFRAME YIG DRIVER ASSEMBLY 86260 80010 NOTE 1 OSCILLATOR PIN MODULATOR od ae Lu Es OSCILLAT a OVERVOLTAGE REGULATED BIAS SUPPLY 7 PROTECTION OVERVOLTAGE CURRENT f PROTECTION ISOLATOR 5 s 2 RF Xo 86260 UR P d ti cake PI 43 OUTPUT i 2 UNREG 95 1 1 1 CIRCUIT BOARD A1U1 2 3 1 TOP VIEW TOP VIEW 1 8 5 FREQ GND 1 4 FREQ IET REF C 1 1 NOTES
114. follows 8620A BAND 12 4 to 18 0 GHz START pointers iicet oett edna havent 12 4 GHz Bey eas daddys 15 2 GHz STOP Me 18 0 2 MANUAL neanss sane AE a E E E E Ria INT TIMES 0 1 0 01 1 KHZ SQ WV OFF Rear Panel OFF RF BLANKING OFF Rear 22 RF BLANKING 86260A nr ON POWER LEVEL Ee Ree esr eei pete piae Fully clockwise Press 8620A LINE switch to ON position Press 8620 CW pushbutton Allow equipment to warm up for 30 minutes 4 2 86260 Performance Tests PERFORMANCE TESTS 4 7 FREQUENCY RANGE AND ACCURACY Cont d NOTE Always approach frequency settings from low frequency end d Adjust CW pointer to high frequency end then to low frequency end repeat several times Set CW pointer to 12 4 GHz Frequency counter should indicate 12 400 mHz 50 MHz Set 8620A CW pointer to 15 2 GHz Frequency counter should indicate 15 200 GHz 50 MHz f Set 8620A CW pointer to 18 0 GHz Frequency counter should indicate 18 000 GHz 50 MHz g Press 8620A START pushbutton Set MANUAL control fully counterclockwise Frequency counter should indicate 12 400 GHz 70 MHz h Set MANUAL control fully clockwise Frequency counter should indic
115. ge information the supplement may contain information for correcting errors in the manual 1 21 DESCRIPTION 1 22 The HP Model 86260A RF Plug in is designed as a plug in for the Model 8620A or 8620B Sweep Oscillator mainframe The instrument consists of a fundamental oscillator in the 12 4 to 18 0 GHz range and associated drive circuitry for tuning The instrument may be remotely programmed through an 8620A rear panel connector 1 23 The RF output of the instrument is controlled by the front panel POWER LEVEL control Power can be leveled externally across the bad using a conventional power sampling and feedback technique The automatic level control ALC switch selects the mode of leveling either external EXT power meter MTR or OFF The front panel ALC EXT INPUT and ALC GAIN are provided to use with an external leveling loop When the UNLEVELED light is on it indicates that the RF power is not level across the band BNC connectors on the rear panel allow for external FM signal inputs and a frequency reference voltage output 86260 1 24 5 1 25 Options for the Model 86260A RF Plug in as follows Option 001 Internal Leveling Option 004 Rear Panel RF Output Option 005 APC 7 RF Output Connector Option 006 High Power Output These options may be combined in any configuration 1 26 OPTION 001 1 27 The 86260A Option 001 adds internal leveling capability to the standard 86260A
116. h to OFF Adjust RNIS voltmeter range switch to obtain an on scale indication The difference between this indication and the one noted in step c should be a minimum of 41 dB see NOTE below 4 13 Performance Tests Model 86260A PERFORMANCE TESTS 4 12 RESIDUAL AM Cont d NOTE A 4 dB decrease in the RMS voltmeter indication corresponds to a 50 dB reduction in signal level A correction factor of 9 dB is added because of the RMS voltmeter response to a squarewave and the square law response of the crystal detector 4 13 EQUIVALENT SOURCE SWR SPECIFICATION SWR 2 0 Impedance 50 Ohms nominal DESCRIPTION The RF OUTPU TT signal is measured using a directional coupler crystal detector and oscilloscope This incident signal from the Plug in contains 1 the initial signal from the oscillator and 2 the reflected signal Toe reflected signal is developed as follows The original oscillator signal travels down the 20 cm air lines sees the open end and is reflected back to the source If the reflected signal going into the RF OUTPUT connector sees a perfect 50 ohm source match no signal is reflected back out of the source However the greater the mismatch the greater the reflected signal This reflected signal adds and subtracts in and out of phase with the incident oscillator signal end is displayed on the oscilloscope SWEEP OSCILLATOR RF PLUG IN SWEEP OUT SF OUTPUT DIRECTIONAL OSCILLOS COPE COUPLER o
117. hown in If loop gain is too high oscillations may occur as shown in To remove oscillations reduce gain by turn ALC GAIN control 11 counterclockwise Figure 3 8 Power Meter Leveling Operation 2 of 2 3 11 3 12 86260 Performance Tests SECTION IV PERFORMANCE TESTS 4 1 INTRODUCTION 4 2 The performance tests check that the instrument meets the specifications listed in These tests may be used for incoming inspection after repair of the instrument after performing the alignment procedure or for periodic evaluation If only a simple check of the instrument operation is needed the operator s check in Section may be used If a test measurement is slightly out of tolerance go to Section perform the appropriate adjustment procedures If a function fails to operate go to Section VIII for troubleshooting information 4 3 EQUIPMENT REQUIRED 4 4 complete list of equipment required for the performance tests is given in Table 13 the recommended equipment in the list is not available a substitute may be used if it meets or exceeds the critical specifications listed in the table 4 5 TEST RECORD 4 6 is a test record form that is provided to record results from the performance tests The table is keyed to the paragraph numbers and test titles in the procedures NOTE In the following procedure 8620A mainframe is specified However an 8620B may be used but the control na
118. ing an external phase lock signal applied to the FM connector The phase lock function provides a means of obtaining a very stable CE frequency by transferring the frequency stability of the reference oscillator to the source If the CW frequency starts to drift the phase difference between the CW frequency and the reference frequency reference oscillator is detected and a dc voltage is a correction signal which restores the CW frequency to its previous point Stability of this CW frequency is determined by the stability of the reference oscillator 3 2 TM 11 6625 2917 14 amp P 14 Model 86260A 3 20 Frequency Reference 3 21 voltage which is an analog of frequency is available for referencing or phase locking external equipment to the plug in The dc voltage is 12 0 to 18 0 V 1V GHz corresponding to the frequency range 3 22 FM NORM PL Switch 3 23 The FM NORM PL Switch is located on the rear panel of the instrument The switch is used in NORM Position for normal operation in PL position for phase locking and in FM position for high modulation frequencies 3 24 OPERATOR S MAINTENANCE 3 25 There is no operator maintenance required on the 86260A RF Plug in If there is a loss of power to the Plug in it may be necessary to replace a defective fuse in the 8620A or 8620B mainframe See mainframe Operating and Service Manual for fuse replacement 3 26 Replacement of the UNLEVELED lamp is shown in section VIII
119. intenance will be those prescribed by TM 38 750 The Army Maintenance Management System b of Item and Packaging Discrepancies Fill out and forward SF Form 364 Report of Discrepancy ROD as prescribed in AR 735 11 2 DLAR 4140 55 NAVMATINST 4355 73 AFR 400 54 MCO 4430 3E c Discrepancy in Shipment Report DISREP SF 361 Fill out and forward Discrepancy in Shipment Report DISREP SF 361 as prescribed in AR 55 38 NAVSUPINST 4610 33B AFR 75 18 MCO P4610 19C and DLAR 4500 15 0 4 Reporting Equipment Improvement Recommendations EIR If your Model 86260A needs improvement let us know Send us an EIR You the user are the only one who can tell us what you don t like about your equipment Let us know why you don t like the design Tell us why a procedure is hard to perform Put it on an SF 368 Quality Deficiency Report Mail it to Commander US Army Communications Electronics Materiel Readiness Command ATTN DRSEL ME MQ Fort Monmouth NJ 07703 We ll send you a reply 0 5 Administrative Storage The Model 86260A can be stored in stockrooms warehouses or other protected facilities The equipment should be protected from excessive humidity sand dust and chemical contaminants Before putting the Model 86260A into administrative storage make the following preparations Complete the performance tests adjustments and services indicated in and VII and assure that unit is completely operable
120. iver adjustment Encloses front panel designation Encloses rear panel designation Circuit assembly borderline Other assembly borderline Heavy line with arrows indicates path and direction of main signal Heavy dashed line with arrows indicates path and direction of main feedback Wiper moves toward CW with clockwise rotation of control as viewed from shaft or knob Encloses wire color code Code used MIL STD 681 is the same as the resistor color code First number identifies the base color second number the wider stripe and the third number identifies the narrower stripe e g 947 denotes white base yellow wide stripe violet narrow stripe Number Service Sheet number for off page connection Letter off page connection Light emitting diode LED Breakdown diode PIN diode Field effect transistor FET with N type base Figure 8 9 Schematic Diagram Notes 1 of 2 8 6 86260 3 4 om V Service SCHEMATIC DIAGRAM NOTES Cont d Field effect transistor FET with P type base Operational amplifier integrated circuit Test point location Number denotes test point number Assembly ground Signal ground Chassis ground Earth ground Common connection on same page For symbols not shown refer to USA Standard Y32 2 1967 Graphic Symbols for Electrical and Electronic Diagrams Logic Symbols used conform to MIL STD 806B Military Standard 806B Graphic Symbols f
121. l 2 OFF RF BLANKING OFF Rear Panel OFF 86260A pM ON ALG ITE OFF POWER sire eot maire terio ribi ter Fully clockwise Figure 8 10 Schematic Measurement Conditions 8 8 86260 Service TROUBLESHOOTING TEST SETUP DC DIGITAL VOLTMETER OSCILLOSCOPE RF PLUG IN POWER METER SWEEP OUTPUT RECORDER RF OUTPUT 10 dB ATTENUATOR 4 THERMI STOR MOUNT 10 48 ATTENUATOR EQUIPMENT REQUIRED Sweep OsScillatOr 5 er met E M hd en ea deed HP 8620A PRE PUG ii doe co tie etr er mec eS RE nds eO e Da re HP 86260A ocu ME HP 432A Thermistor MOUNT ero eed e eri epp HP 8478B DC Digital Voltmeter s tne enn ven olea a HP 3460B Frequency HP 5340A i iin de Eee Ec nip Educ HP 180 1801 1820 DirectionaliGoupler gt ie ie rete eR ede en etes HP 779D 10 Attenuator 2 HP 8491B Option 010 Figure 8 11 Troubleshooting Test Setup 8 9 86260 Service FUNCTIONAL DESCRIPTION OF THE 86260A RF PLUG IN GENERAL 86260A is an RF Plug in utilizing a YIG tuned oscillator controlled by the 86260A B Sweep Oscillator mainframe Combined they can
122. l to instruments ontaining improvements made after the printing of the manual To use this supplement Make all ERRATA corrections Make all appropriate serial number related changes indicated in the tables below Number Number 1530A 1725A 1 thru 8 1544A 2 1843A 1 thru 9 2 Serial Prefix or Make Manual Changes Serial Prefix or Make Manual Changes 1607A00496 thru 2 3 1607 025 1846 I thru 10 1607A00526 thru 1 thru 4 1607A prefix 1633A I thru 5 1647A 1 thru 6 1705A 1 thru 7 NEW ITEM he following Service Notes are available from your local HP Sales and Service Office SERVICE NOTE SERIAL NUMBER DESCRIPTION 86260A 1 1339A00385 Modification Required for 8410B AND BELOW Compatibility ERRATA Page 1 5 Table 1 1 Frequency Accuracy Change the second line to read CW Mode 3 50 MHZ7 Page 1 5 Table 1 1 Frequency Stability Change third line to read 10 dB Power Level Change from specified maximum power 6 MHz NOTE Manual change supplements are revised as often as necessary to keep manuals as current and accurate as possible Hewlett Packard recommends that you periodically request the latest edition of this supplement Free copies are available from all HP offices When requesting copies quote the manual identification information from your supplement or the model number and print date from the title page of the manual 07
123. lied 1 3 Equipment Required 5 1 Equipment Required But Not Supplied 1 3 Factory Selected Components Equipment Available Related Adjustment 5 2 1 42 Adjustments Location 5 2 1 44 Recommended Test Equipment 1 3 Oscillator Bias Level and Bias Limit Adjustment 5 2 INSTALLATION enn 2 1 5 14 Frequency Adjustment L 5 5 2 1 Introduction 2 1 Leveling Amplifier Offset 2 83 Initial Inspection Adjustment sss 5 7 Preparationforu se e nnec deren ceci 2 6 Power 4 E Co 2 8 Interconnections 2 1 REPLACEABLE 1 6 1 2 10 Mating Connectors 2 1 6 1 4 6 1 Operating Environment 2 2 Abbreviations 6 1 Frequency Scale Installation Replaceable Parts List 6 1 2 17 Swing down Front Panel 2 2 6 7 4 2 2 18 Stationary Front
124. ltage drop across parallel resistors A1R27 and A1R28 forward biases A1Q4 The increased conduction of A14 shunts current from the base of A1Q1 thus allowing less current to A1Q6 With less base current to A1Q1 the conduction of A1Q1 decreases making the output voltage decrease Maximum current available from the supply is approximately 1 2 amperes with the voltage approaching zero volts depending upon load conditions Voltage foldback OVERVOLTAGE PROTECTION To prevent damage to the YIG tuned oscillator the regulated bias supply has two methods of overvoltage protection If the bias voltage exceeds 13 3V A1CR4 draws excessive supply current activating the current limiting circuit to reduce the supply voltage and possibly blowing fuse Fl The second method operates as follows The output bias voltage is held below a specific maximum voltage by breakdown diode A1CR5 breakdown value depends upon bias gt voltage requirement of the oscillator If the bias voltage increases beyond the specified level A1CR5 will conduct biasing on A1Q5 which will cause silicon control rectifier SCR A1Q3 to gate on and blow fuse F1 FREQUENCY REFERENCE AMPLIFIER The frequency reference amplifier consists of A1U2 A1Q7 and associated components The tuning voltage from the 8620A mainframe is applied to the non inverting input of A1U2 at pin 3 The low output impedance of A 1Q7 isolates the external equipment from the 8620A mainframe and oscillator ci
125. m PUT 20 CM AIR LINES 2 MAIN LINE L X14E OPEN gt 7 TON COUPLED MALE ADAPTER EXT HOR Z INPUT CRYSTAL DETECTOR Figure 4 9 Equivalent Source Match Test Setup 4 14 86260 Performance Tests PERFORMANCE TESTS 4 13 EQUIVALENT SOURCE SWR Cont d EQUIPMENT Sweep OsoplllatOr utere a n trie HP 8620A Plug In ie ect esr inhi ia ERR Le HP 86260A OSCIIIOSCODE 180 1801 1820 Crystal Detector eere ento HP 423A Directional HP 779D 20 Air Lines 2 iei riti kei RR bine ped HP 11567A APC 7 to Male 2 HP 11525A PROCEDURE a Connect equipment as shown in Figure 4 9 b Set controls as follows 8620A tit rea ieri uiii 12 4 to 18 0 GHz START NT 12 4 STOP rE uui eet SS M UM 18 0 GH MARKER TRIG GER eee INT 1 5 nennen nnns 0 1 0 01 TIME SECONDS Fully Clockwise 1 KHZ SQ WV OFF Rear OFF RF BLANKING OFF Rear RF BANKIN
126. mental frequency displayed on spectrum analyzer This is the reference level for the test Set the 8620 rear panel 1 KHZ SQ WV OFF switch to OFF Position Adjust external power supply 10 0 output The power output as observed on OFF spectrum analyzer should decrease by gt 25 dB below the reference g Disconnect external power supply from 8620A EXT AM connector ONIOFF Ratio h Connect oscilloscope and crystal as shown Figure 4 14 i Set controls as follows 8620A SWEEP MODE teta ide AUTO SWEEP TIME caen eheu 1 01 SEC SWEEP TIME Fully clockwise 1 KHZ S WV OFF Rear Panel 1 KHZ SQ WV RF BLANKING OFF Rear 2 RF BLANKING 86260A POWER LEVEL daa Maximum Leveled Power Hc EXT 11 6625 2917 148 14 Performance Tests Model 86260A PERFORMANCE TESTS 4 15 INTERNAL AND EXTERNAL AM j Press 8620A START pushbutton Observe oscilloscope trace The blanking line should be coincident with OFF portion of the RF signal This shows that the squarewave ON OFF ratio and blanking ON OFF ratio are the same Disconnect crystal detector and oscilloscope and connect spectrum analyzer Set 8620A MODE switch to AUTO set TRIGGER switch to EXT and set RF BLANKING OFF switch rear panel to OFF Set reference level
127. mes will be different than those called out in the procedure These procedures assume that the mainframe is fully calibrated to its specifications PERFORMANCE TESTS 4 7 FREQUENCY RANGE AND ACCURACY Allow 30 minutes warmup time SPECIFICATION Frequency range 12 4 to 18 0 GHz Frequency Accuracy At 25 C FM switch in PL or FM 50 MHz CW mode Approach desired Frequency from low frequency end of band 70 MHz Sweep Modes Sweep Time gt 0 1 sec DESCRIPTION The CW mode is checked at three frequencies across the band to determine if the RF signal is within frequency tolerance Start Stop manual sweep is then selected and the frequency at each end point is checked Performance Tests Model 86260A PERFORMANCE TESTS 4 7 FREQUENCY RANGE AND ACCURACY Cont d SWEEP OSCILLATOR RF PLUG IN FREQUENCY COUNTER INPUT 10 98 ATTENUATOR Figure 4 1 NOTE It may be necessary to calibrate the 86260A in the 8620 mainframe in which it will be used Refer to the adjustment section paragraph 5 14 EQUIPMENT Sweep HP 8620A EE HP 86260A Frequency HP 5340A 10 dB 84918 Option 010 PROCEDURE a Connect equipment as shown in Connect frequency counter through a 10 dB attenuator to RF OUTPU T connector b Set controls as
128. n I volt This is the firing point of the oscillator protective circuit NOTE Firing Point Voltage VBIAS 0 5V 0 01V Move RF ON OFF switch to OFF position NOTE Once the protective circuits are tripped the power supply must be shut down before the supply will reset To RESET the bias voltage turn the RF ON OFF switch to OFF then ON Adjust BIAS LIMIT one turn clockwise switch RF ON and adjust BIAS LIMIT counterclockwise until firing point again occurs Reset bias voltage and repeat step k to ensure that BIAS LIMIT adjustment is set to correct firing point voltage Adjust BIAS LEVEL counterclockwise 1 2 turn and reset bias voltage Adjust BIAS LEVEL to VBIASon RF heatsink nameplate 0 01V Turn off 8620A mainframe reconnect P1 and insert A1F1 Turn on 8620A and check bias voltage to ensure that bias level is correct Readjust if necessary 5 14 FREQUENCY ADJUSTMENT REFERENCE Service Sheet YIG DRIVER ASSEMBLY DESCRIPTION Adjusts for CW frequency accuracy to obtain correlation with tuning voltage form 8620A mainframe NOTE Initial adjustments may be made in MANUAL mode but final adjustments and measurements must be made in CW Always approach frequency settings from low frequency end 5 5 11 6625 2917 148 14 Adjustments Model 86260A ADJUSTMENTS 5 14 FREQUENCY ADJUSTMENT Cont d DC DIGITAL VOLTMETER SWEEP OSCILLATOR OUTPUT INPUT ATTENUATOR EQUIPMENT Sweep Osc
129. n YIG Pin Modulator Biased On Should be 0 4V with clockwise POWER LE VEL setting Defective Modulator Defective A4 YIG Oscillator Assy Defective A1 YIG Driver Assy RF power measuring equipment capable of measuring up to 18 0 GHz Incorrect Modulator Bias Should be 0 4 with clockwise POWER LEVEL setting Frequency Accuracy out of Spec Misadjusted A1 YIG Driver Assembly Defective Al YIG Driver Assy Defective A3 FM Assembly Front Panel POWER LEVEL Control Inoperative External ALC Inoperative Incorrect PIN Modulator Bias Should be 0 4V with clockwise POWER LEVEL setting 0 9 V with counter clockwise POWER LEVEL setting Incorrect voltage change from control Should be 1 6V with clockwise POWER LEVEL setting 0 0V with counter clockwise POWER LE VEL setting A2S1 Crystal Detector Polarity switch not set to match feedback detector DC feedback voltage not correct Should be 25 mV to 250 mV Defective A2 ALC Assembly Check Point 551 4 3 552 AS wire 882 551 551 Paragraph 4 7 551 583 552 A5 wire SS2 2 4 Table 8 1 Troubleshooting Hints 2 of 2 Symptom Power Meter MTR Leveling Inoperative Residual FM CW Mode Excessive Frequency Drift NOTE Frequency stability should be measured after mini mum 30 minute warm up period at the same freq uency with RF pow
130. n with Option 001 installed components and assemblies used with the Option 001 are contained in this section In addition it describes the manual changes necessary to document the addition of Option 001 The Option 001 is compatible with all 86260A options 9 3 DESCRIPTION 9 4 The Model 86260A Option 001 incorporates a detector and directional coupler to provide internal leveling capability A four position ALC Switch S2 is mounted on a new lower front panel 9 5 MANUAL CHANGES 9 6 The following changes are required to modify and expand the Model 86260A Operating and Service Manual to include the HP Model 86260A Option 001 Page 1 5 1 1 Power Level and Power Variation Change Power Level to Maximum Leveled Power Option 001 gt 6 0 dBm 4 mW Add under Power Variation the following specification Internally Leveled lt 0 7 dB Replace Figure 3 1 with Figure 9 1 Change SPECIFICATION to Maximum Leveled Power Option 001 gt 6 0 dBm 4 mW Add Power Variation at Maximum Leveled Power Internally Leveled Option 001 lt 0 7 dB Paragraph 4 10 Add after step n the Performance Test for Internal Leveling 86260A Option 001 steps o through t in this Section 4 23 Table 4 1 4 10 Add the following after step n q Internally leveled maximum output power Lower Limit 6 dBm t Internally leveled variation Upper Limit 1 4 dB p p Add the following A2R17 SLOPE Adjusts
131. nal crystal detector leveling mode use the test setup and procedures in Figure 3 7 3 12 External Power Meter Leveling 3 13 Power leveling can be accomplished with a power meter connected to a directional coupler The coupler samples the RF energy and applies it to the power meter A dc voltage from a rear panel jack on the power meter is applied to the EXT INPUT connector on the 86260A front panel The circuitry senses the changing dc level and causes the RF output to change thus keeping the RF output at a constant level A power meter switch on the A2 ALC Board selects either 431 or 432 3 14 External AM 3 15 At approximately 6 dB below maximum power out the RF output CW signal can be amplitude modulated from 0 to 10096 using an external modulating signal applied to the 8620A EXT Operation AM connector External amplitude modulation is possible in all operating modes A negative 10 volts reduces the RF output power by at least 30 dB 3 16 External FM 3 17 The RF output signal can be frequency modulated using an external modulating signal applied to the FM connector The external FM function provides a means of obtaining an output frequency that varies under the control of an external modulation signal A positive going voltage causes output frequency to decrease while a negative going voltage causes output frequency to increase 3 18 Phase Lock Operation 3 19 The RF output CW signal may be phased locked us
132. nges Make corrections to A2 ALC Assembly schematic as shown in Figure 3 of this Manual Changes Add the words NOTE 4 above S2 on schematic and add below note 3 the following 4 INT is connected only for Option 001 There is no connection to 46wire in Standard instrument Change Q4 and Q5 to Part Number 1853 0451 Change reference designator of diode shown just below CR37 from CR28 to CR38 7 5 86260 90012 86260 1 Page 9 7 9 1 Add A2CR39 HP Part Number 1901 0033 Page 9 11 Figure 9 71 Add CR39 as shown in partial schematic Figure 9 7 1 FRONT PANEL CHANGE 1 CHANGE 2 NOTE This change deletes the standard A2 ALC Assembly including the replaceable parts list component locations and schematic The Option 001 A2 ALC Assembly schematic and parts list in Sect TX will be used for both the standard 86260A and 86260A Option 001 6 5 Table 6 2 Delete A2 ALC Assembly HP Part Number 86260 6001 1 and all A2 parts Add the NOTE See the A2 Replaceable Parts in Table 9 1 Page 9 7 of Section IX Page 6 7 Table 6 2 Change S2 to HP Part Number 3100 2659 SWITCH LEVER ALC Change HP Part Number 86260 60001 to 86260 60026 CABLE ASSY MAIN Change 51 HP Part Number to 3100 3085 7 6 86260 86260 90012 CHANGE 2 Cont d Replace A2 ALC Assembly with Figure 1 of this change sheet 0 7 at Max RF out A2 ALC ASSEMBLY 86260
133. not intended to serve as wiring diagrams 8 3 ASSEMBLY SERVICE SHEETS 8 4 The schematics are arranged by service sheets The service sheet numbers appear in the lower right hand corner of the schematics large number above assembly number Included in the service sheet is the schematic as well as the accompanying circuit theory component parts location photo simplified block diagrams and schematic level troubleshooting 8 5 PRINCIPLES OF OPERATION 8 6 Circuit Description 8 7 Detailed circuit description for each individual schematic diagram is placed on the facing left hand foldout page This places material needed for printed circuit level diagnosis in one location and allows easy correlation between function and specific circuitry 8 8 YIG Tuned Oscillator 8 9 The YIG yttrium iron garnet oscillator is an electrically tunable resonant structure made from a single yttrium iron garnet crystal and formed into a highly polished sphere Because yttrium iron garnet is a ferrite magnetic material it is made up of a high density of randomly oriented magnetic dipoles Each dipole consists of a minute current loop formed by a spinning electron Because of the random orientations there is no net magnetic effect external to the YIG sphere 8 1 8 1 8 11 support oscillations a second magnetic field produced by an RF signal is applied perpendicular to the net magnetization vector This causes the net magnetization vec
134. ns Overhaul is normally the highest degree of maintenance performed by the Army Overhaul does not normally return an item to like new condition k Hebuild Consists of those services actions necessary for the restoration of unserviceable equipment to a like new condition in accordance with original manufacturing standards Rebuild is the highest degree of materiel maintenance applied to Army equipment The rebuild operation includes the act of returning to zero those age measurements hours miles etc considered classifying Army equipments components D 3 Column Entries a Column 1 Group Number Column 1 lists group numbers the purpose of which is to identify components assemblies subassemblies and modules with the next higher assembly b Column 2 Component Assembly Column 2 contains the noun names of components assemblies subassemblies and modules for which maintenance is authorized c Column 3 Maintenance Functions Column 3 lists the functions to be performed on the item listed in column 2 When items are listed without maintenance functions it is solely for purpose of having the group numbers in the MAC and RPSTL coincide d Column 4 Maintenance Category Column 4 specifies by the listing of a work time figure in the appropriate subcolumn s the lowest level of maintenance authorized to perform the function listed in column 3 This figure represents the active time required to perform that maintenanc
135. nt of RF to the RF output connector External AM signals are applied to the EXT AM Amplifier on the A2 ALC board and the internal AM signals 1 KHZ Square Wave Markers Blanking are fed to the Summing Amplifier on the A2 ALC board The outputs of the AM Amplifier Reference Amplifier and the Summing Amplifier are summed and fed to the ALC Amplifier then to the Modulator Driver which provides the PIN Modulator bias voltage 8 10 3820 MAINFRAME TUNING 16 VOLTAGE 1 1 10 0V FRE 18 0GHz 1 0 66V 102469 Loewe ein 0 10 98 0 M CS INVERTER REGULATED BIAS SUPPLY LO FREQUENCY 7 01 55 FILTER ner 1 2 ALC ASSEMBLY 86260 60011 4 VIG TUNED OSCILLATOR NOXIUM PM TUNING BIAS AB PIN ISOLATOR MODULATOR LEVELING INPUT SW POLARITY ALC EMITTER AMPLIFIER 7 FOLLOWER 2 APT ids 1 O 431 V 4 H i FROM ALC 1 6 Vde AT OUT sw R 0 0 AT OUT 8620 AM AMPLIFIER SNLEVELED MAINFRAME EZ POWER 121 69 v E EE ESE T 1 i i 1 1 H 1 BLANKING lt 3 i Xi VUNS 1 MARKE
136. ode The new oscillator is in the range of 7 15V to 7 77V using a 6 81V zener diode Replace the 8 25V diode with the 6 81V diode Refer to Table HP Part Number 5 Install new zener diode and continue VBIAS adjustment procedure NOTE In the following procedure an 8620A mainframe is used however an 8620B may be used but the controls will be different that those called out in the procedure Set 8620A controls as follows Disconnect P1 located by XA3 Temporarily remove board for easy access to P1 Remove fuse AIFI located under A1TP5 f Turn BIAS LEVEL A1R34 fully counterclockwise and BIAS LIMIT A1R43 fully clockwise NOTE The BIAS LEVEL and BIAS LIMIT adjustments are 17 turn potentiometers g Connect DVM to 86260A A1TP7 and ground lead to A1TP6 The BIAS LEVEL and BIAS LIMIT controls must be adjusted in the exact order and to the exact voltage levels indicated in the procedure or damage to the YIG tuned oscillator may result h Turn on 8620 i Adjust BIAS LEVEL to VBIAS noted on oscillator nameplate plus 0 5V 0 01IV Example If the required bias voltage is 8 5V then BIAS LEVEL is adjusted to 9 OV 8 5V 0 5V 9V 5 4 11 6625 2917 148 14 86260 Adjustments ADJUSTMENTS 5 13 OSCILLATOR BIAS LEVEL AND BIAS LIMIT ADJUSTMENT Cont d j Adjust BIAS LIMIT counterclockwise until bias voltage suddenly drops to less tha
137. of signal on spectrum analyzer Set RF BLANKING OFF to RF BLANKING Power level difference should be gt 25 dB ON OFF ratio Adjust START control through frequency band and note minimum and maximum power points Check ON OFF ratio at these points by setting 8620A RF BLANKING OFF switch to RF BLANKING and OFF Power level at all frequency points across band should have an RF ON OFF ratio of gt 25 dB 4 22 86260 Table 4 1 Performance Test Record Hewlett Packard Model 86260A RF PLUG IN Serial No Test Description FREQUENCY RANGE AND ACCURACY d CW pointer to 12 4 GHz e CW pointer to 15 2 GHz f CW pointer to 18 0 GHz g START STOP MANUAL control ccw h START STOP MANUAL control cw FREQUENCY STABILITY b Line Voltage at 103 c Line Voltage at 127 VAC d 10 dB Power Level Change RESIDUAL FM IN 10 KHZ BANDWIDTH i Peak to peak Residual FM POWER LEVEL AND VARIATION c Crystal leveled maximum output power f Crystal detector leveling variation j Power meter leveling variation n Power variation unleveled SPURIOUS SIGNALS d Below fundamental at 7 dBm power output Harmonic Non Harmonic RESIDUAL AM d Below maximum output power EQUIVALENT SOURCE SWR f SWR EXTERNAL FM c Modulation frequency of 200 Hz d Modulation frequency of 200 kHz INTERNAL AND EXTERNAL AM f Attenuation with 10 Vdc input ON OFF ratio with internal kHz applied Tested By Date Lower Limit 12 350
138. oillatOr iiec eic HP 8620A CEP 86260 Digital 3460 Frequency 5340 10 dB 84918 Option 010 PROCEDURE a Press 8620A START pushbutton to select START STOP sweep mode Turn MANUAL sweep control through its range several times b Set 8620A MANUAL control fully counterclockwise Adjust LOW frequency limit A1R3 for frequency counter indication of 12 400 GHz 70 MHz Set 8620 MANUAL control fully clockwise Adjust HI frequency limit AIR6 for frequency counter indication of 18 000 GHz 70 MHz d Press 8620A CW pushbutton Set CW pointer so voltages at A1TP4 will correspond to DVM voltages listed in able 5 3 If readout on frequency counter is out of tolerance adjust A1R3 and IR6 as necessary to obtain all points within tolerance 5 6 86260 Adjustments ADJUSTMENTS 5 14 FREQUENCY ADJUSTMENT Cont d Table 5 3 Frequency Tracking Adjustment Set CW for DVM Indication Frequency Counter Compromise Adjustment at 86260A A1TP2 Vdc Indications GHz 0 667 0 005 12 400 0 025 A1R3 2 500 0 005 13 500 0 025 5 000 0 005 15 000 0 025 7 500 0 005 16 500 0 025 10 000 0 005 18 000 0 025 5 15 LEVELING AMPLIFIER OFFSET ADJUSTMENT REFERENCE Service Sheet 2 ALC ASSEMBLY DESCRIPTIO
139. on 001 004 11 5 Location of Adjustments 11 5 Location of Major Assemblies Test Points Option 001 9 12 Left Side View Option 001 00 11 5 Location of Major Assemblies Location of MAJOR Assemblies Left Side View Option 001 9 12 Top View Option 001 004 11 6 Location of Major Assemblies 11 7 Location of Major Assemblies Top View Option 001 Bottom View Option 001 004 11 6 Location of major Assemblies 12 APC 7 RF Output Connector Bottom View Option 001 Exploded View Option 005 Page Table Page Specifications for 86260Alnstalled in 8620A1 5 5 3 Frequency Tracking Adjustment Supplemental Performance Characteristics 6 1 Reference Designations for 86260A Installed in 86204 1 6 and Abbreviations 6 2 Recommended Test Equipment 6 2 Replaceable Model 86260A Mating Connectors Parts Cross Reference Performance Test Record 7 1 Manual Changes by Serial Number List Selection of AICR5 Breakdown Diod
140. or Logic Diagrams Figure 8 9 Schematic Diagram Notes 2 of 2 86260 Service SCHEMATIC MEASUREMENT CONDITIONS Voltages noted within circuits are measured with respect to chassis ground and have a 10 tolerance Conditions for waveforms and dc voltages on schematics are as follows a Waveforms taken in START STOP sweep mode START pushbutton pressed b DC Voltages measured in CW mode CW pushbutton pressed Other 8620A 86260A control setting the same as noted below DC DIGITAL VOLTMETER OSCILLOSCOPE SWEEP OUTPUT Test Setup for Waveforms and Voltages Shown on Schematics EQUIPMENT REQUIRED Sweep Oscillator iie Mee ei i ate HP 8620A Pl g zih aiina e du aa a E HP 86260A OscillOSCOpe med aan ieee diate HP 180A 1801A 1820A DG Digital Voltmeter ian nie ion ede Petite bes HP 3460B Set controls as follows 8620A START pointer asa oae deo De a dere exe aee eee ce ade ene 12 4 GHz CW pointen cnet entries tell eed ae Vey eerta eod uus eap 15 2 GHz STOP PONTET 18 0 GHz MARKER pod uz EE ON ETE AUTO 5 M SS Um MEL 0 1 0 01 SWEEP TIME Vernier Fully clockwise 1 KHz SQ WV OFF Rear Pane
141. provide a single frequency or swept RF signal with frequency modulation amplitude modulation and leveled output capability TUNING The mainframe generates a voltage tuning ramp corresponding to the start to stop swept frequency range or a constant DC level corresponding to a point on the ramp for a single frequency The tuning voltage is applied to the Al YIG DRIVER Assembly where it is inverted and amplified to drive the main tuning coil of the YIG tuned oscillator FREQUENCY MODULATION The external FM signal is processed in the A3 FM Assembly High deviation FM limited to low modulation frequencies is accomplished by applying the signal to the A1 YIG Driver Assembly and summing it with the tuning voltage to drive the main tuning coil of the YIG tuned oscillator Large deviations are possible due to the wide tuning range of the main tuning coil The large inductance of the main tuning coil offers a high reactance at high frequencies limiting the response of the main tuning coil to low frequencies Low deviation FM capable of high modulation frequencies is achieved by driving the low inductance FM coil This coil has much less tuning control than the main tuning coil but will respond to high modulation frequencies The high pass filter on FM Assembly A3 keeps high modulation frequencies limited to the FM Coil AMPLITUDE MODULATION Amplitude modulation is accomplished by varying the insertion loss of A5 PIN Modulator which varies the amou
142. r ke Manual Change 1339A00356 thru A 1339A00390 1339A00223 and 1217A00211 and 1217400212 1217400217 thru 1217A00220 and 1339A00231 thru 1217A00230 1339A00355 7 5 MANUAL CHANGE INSTRUCTIONS CHANGE A Page 6 5 Table 6 3 Change A1C7 to HP Part Number 0160 2257 CER 10 PF 5 500 WVDC 28480 0160 2257 Page 8 1 Figure 8 13 SERVICE SHEET 1 Change A1C7 to 10 CHANGE B Page 6 6 Table 6 3 Add A2C6 HP Part Number 0180 1743 FXD ELECTROLYTIC 0 1 UF 10 35VDCW 7 1 Manual Changes Model 86260A CHANGE Cont d 8 15 Figure 8 15 SERVICE SHEET 2 Add A2C6 as shown partial schematic Figure 7 11 LEVELING AMPLIFIER cro 425 1000 R24 3160 R23 TOK R19 31 6K CRYSTAL DETECTOR 10V UE t POLARITY R12 da Q 6 POWER L B 1 215K 520 R20 432 3005 2 9 431 5V R16 R17 R21 1000 1000 215K 2 C8 uk R18 100 Figure 7 1 Partial Schematic of A2 ALC Assembly CHANGE B CHANGE C Page 6 5 Table 6 3 Change A1C6 to HP Part Number 0160 2257 CER 5 500VDCW 28480 0160 2257 Page 8 13 Figure 8 13 SERVICE SHEET 1 Change A1C6 to 10 7 2 MANUAL CHANGES MANUAL IDENTIFICATION Model Number 86260A Date Printed August 1975 Part Number 86260 90012 his supplement contains important information for correcting manual errors and for adapting the manua
143. rcuits The reference voltage 8 12 Service is applied to the rear panel FREQ REF connector J5 The output voltage is proportional to frequency 1V GHz RELAY DRIVER In CW or Manual sweep relay driver A1Q1 energizes A1K1 placing a capacitance A1C11 A1C12 across the YIG tuning coil to reduce residual FM INVERTER Integrated circuit 101 is an operational amplifier that amplifies and inverts the 0 to 10 volt tuning voltage ramp developed in the 8620A mainframe and low frequency FM signals from the FM assembly From A1U1 the inverted ramp and the frequency modulation from the FM assembly A3 are applied to A1Q2 HI FREQ A1R6 and LO FRE1 8 A1R3 adjustments at the input to A1U1 set the ramp limits Capacitor A1C4 connected across the input to A1U1 filters the tuning voltage which reduces the residual FM in CW and Manual sweep operations COIL DRIVER The output of the inverter A1U1 is applied to a darlington pair amplifier comprising A1Q2 and chassis mounted transistor Q2 Q2 is in series with the YIG tuning coil and controls the current through the coil Any large negative going spikes are shunted around the coil by coil protection circuit CR6 CR7 FUNCTIONAL DESCRIPTION TROUBLESHOOTING HINTS TROUBLESHOOTING BLOCK DIAGRAM SERVICE SHEET 1 1 YIG Driver Assembly Circuit Description GENERAL The A1 YIG Driver Assembly contains a Regulated Bias Supply that provides constant voltage current limited bias for the
144. re applied to the FM Assembly through rear panel BNC connector J4 FM sensitivity is selected by the 86260A rear panel FM NORM PL switch 20 MHz V in the FM or NORM positions and 6 MHz V in the PL position The A3 FM Assembly also contains a Hi Pass Filter HI PASS FILTER Hi Pass Filter consisting of C1 C2 R4 and R5 prevent signals below 200 Hz from reaching the FM Driver circuitry These low frequency signals are passed to the Lo FM Freq Amplifier FM DRIVER The three transistor FM Driver circuit provides sufficient gain to drive the FM coil of the YIG Oscillator The sensitivity of the FM coil is 100 2 LO FREQ FM AMPLIFIER The Lo Freq FM Amplifier is a single op amp U 1 in a fixed gain configuration that provides signal inversion and less than unity gain 8 16 86260 Figure 8 17 FM Assembly Components Location FM ASSEMBLY 85260 60012 NOTE 1 86260 REAR PANEL CR2 em K h 1 aw TK eret R2 TF HI PASS 4 77 FILTER FM DRIVER Service Service NOTES 1 REFERENCE DESIGNATIONS WITHIN THIS ASSEMBLY ARE ABBREVIATED ADD ASSEMBLY NUMBERS ABBREVIATION FOR COMPLETE DESCRIPTION 2 UNLESS OTHERWISE INDICATED RESISTANCE IN OHMS CAPACITANCE IN PICOFARADS P O OF Ag YIG TUNED OSCILLATOR REFERENCE DESIGNATIONS
145. requency modulation FM or phase lock PL modes of operation FREQ REF connecior J5 Provides 12 0 to 18 0 volt ramp signal from the Plug in The signal is used as a dc analog of frequency FM Connector J4 Input connector for frequency modulation signal or phase locking error signal Figure 3 2 Rear Panel Connectors and Controls 3 4 11 6625 2917 148 14 86260 Operation OPERATOR S CHECK N x OSCILLOSCOPE SWEEP OSCILLATOR RF PLUG IN 2 ARIS OUTPUT 10 48 s ATTENUATOR vers SWEEP QUT OUTPUT DETECTOR EQUIPMENT Sweep Oscillator 24 HP 8620 86260 OSCIHOSCODE Pisin bs HP 180A 1801 A 1820A Crystal Detect r cauc angaa os gmdate tgs HP 8470A Option 012 10 dB 84918 Option 010 Figure 3 3 Check 1 of 2 3 5 11 6625 2917 148 14 Operation Model 86260A OPERATOR S CHECK PROCEDURE Set controls as follows 8620A 12 4 to 18 0 GHz START green 1 Left hand end frequency STOP red 7 Right hand end frequency CW white 4 Center of scale MARKER 15 TRIGGER 16 MANUAL SWEEP control 18 Fully counterclockwise TIME SECONDS 14 0 01 Fully counterclockwise TIME SE
146. rs Q1 Q2 and are turned on respectively with the front panel ALC switch in the OFF EXT and MTR positions to provide proper U1 gain shaping for each input With the ALC switch in the OFF position the voltage at TP2 should be variable from 0 7Vdc to 1 3Vdc by rotating the front panel POWER LEVEL control from clockwise maximum RF power output to counterclockwise minimum RF power output MODULATOR DRIVER The Moduator Driver Q8 and 09 are emitter followers that supply current to drive the PIN modulator The complementary emitter base junctions provide no dc offset voltage between TP1 and TP2 Transistor FET Q7 acts as a variable resistor to shunt a portion of Q8 base current to ground controlling the gain of the ALC circuit When the control is set counterclockwise FET Q7 is at a maximum conduction and the ALC gain is minimum With the ALC switch in the OFF position 10Vdc is applied to CR15 turning it on and turning Q7 off This will cause the front panel ALC GAIN control to be inoperative A1 YIG Driver Assembly Components Location A1 YIG Driver Assembly Schematic SERVICE SHEET 1 86260 Figure 8 13 1 YIG Driver Assembly Components Location Model 86260A CURRENT LIMITING The current limiting circuit consists of A1Q4 A1R27 and A1R28 and will allow several hundred milliamps of current to flow with no reduction in output voltage When excessive current is being drawn the vo
147. signal from 8620A f Observe RF signal and adjust SLOPE control A2R17 for optimum level RF output at 12 4 GHz Internal Leveling Gain Adjustment 9 0 2 VOLTS DIV sensitivity on oscilloscope h Connect oscilloscope to A2TP5 i GAIN potentiometer A2R58 fully clockwise Oscillations should appear on trace See Figure 3 6 GAIN counterclockwise until oscillations just disappear k Rotate POWER LEVEL control through its full range As the POWER LEVEL control is rotated oscillations may occur oscillations occur continue to adjust GAIN counterclockwise to just remove all oscillations over entire range of POWER LEVEL control 6 5 Table 6 2 Change A2 to HP Part Number 86260 60021 Change A2 Replaceable Parts List to read as Table 9 1 Model 86260A Option 001 Table 9 1 Replaceable Parts Reference HP Part Qty Description Mfr Mfr Part Number Designation Number Code A2 86260 60021 1 ALC ASSEMBLY 28480 86260 60021 A2C1 0160 3451 1 CAPACITOR FXD 01UF 80 20 100WVDC CER 28480 0160 3451 A2C2 0143 0198 2 CAPACITOR FXD 200PF 5 300WVDC MICA 72136 DM15F201J0300WVICP A2C3 0160 2255 2 CAPACITOR FXD 8 2 25PF 500WVDC 28480 0160 2255 A2C4 0160 0174 2 CAPACITOR FXD 47UF 80 20 25WVDC CER 28480 0160 0174 A2C5 0140 0198 CAPACITOR FXD 200PF 5 300WVDC MICA 72136 DM15F201J0300WVICP A2C6 0160 2255 CAPACITOR FXD 8 2 25 500WVDC CER 28480 0160 2255 A2C7 0160 0127 4 CAPACITOR FXD 1UF 20 25WVD
148. sory and recommended test equipment list b SECTION INSTALLATION contains information relative to receiving inspection preparation for use mounting packing and shipping c SECTION OPERATION contains operating instructions for the instrument d SECTION IV PERFORMANCE TESTS contains information required to verify that instrument performance 15 accordance with published specifications e ADJUSTMENTS contains information required to properly adjust and align the instrument after repair f SECTION VI REPLACEABLE PARTS contains information required to order all parts and assemblies or effect exchange of assemblies 9 SECTION MANUAL CHANGES normally contains backdating information to make this manual compatible with earlier equipment configurations h SECTION VIII SERVICE contains descriptions of the circuits schematic diagrams parts location diagrams and troubleshooting procedures to aid the user in maintaining the instrument i SECTIONS IX through OPTIONS 1 1 1 6 SPECIFICATIONS 1 7 Instrument specifications are listed in Table 1 1 These specifications are the performance standards or limits against which the instrument is tested lists supplemental characteristics Supple mental characteristics are not specifications but are typical characteristics included as additional information for the user 1 8 SAFETY CONSIDERATIONS 1 9 General 1 10 This is Intern
149. talled addition it describes the manual changes necessary to document the addition of Option 006 13 3 DESCRIPTION 13 4 The Model 86260A Option 006 incorporates a YIG Tuned Oscillator YTO that is capable of a higher output power Using this YTO increases the 86260A output power to 10 dBm 13 5 MANUAL CHANGES 13 6 The following changes and additions provide information to show the differences in the RF Plug in with Option 006 installed Table 1 1 POWER OUTPUT Change Power Level to Maximum Leveled Power Option 006 510 dBm 10 mW 4 6 Paragraph 4 10 Change SPECIFICATION to Maximum Leveled Power Option 006 12 4 to 18 0 GHz gt 10 dBm 10 mW Page 4 8 Paragraph 4 10 Step c Change the last sentence of step c to read For Option 006 power meter should indicate gt 10 dBm Page 4 23 Table 4 1 Paragraph 4 10 Change step c to read dc Crystal leveled maximum output power Option 006 Lower Limit 10 dBm 6 7 Table 6 2 Change A4 to HP Part Number 86260 60033 YIG TUNED OSCILLATOR ASSY Option 006 13 1 13 2 310 4 310 7 38 750 750 244 2 11 6625 2917 14 amp 14 REFERENCES Index of Technical Publications Technical Manuals Technical Bulletins Supply Manuals Types 7 8 and 9 Supply Bulletins and Lubrication Orders US Army Equipment Index of Modification Work Orders The Army Maintenance Managem
150. tector Leveled External 4 lt 0 1 dB Power Meter Leveled External 5 lt 0 1 dB SPECIFICATIONS Spurious Signals Below fundamental at 7 dBm power output Harmonics gt 25 dB Nonharmonics gt 50 dB Residual AM AM noise 100 kHz bandwidth below funda mental at maximum power output Residual AM gt 50 dB Source SWR Unleveled lt 2 0 Output Impedance of 86260A RF OUTPUT con nector 50 ohms nominal MODULATION External FM FM NORM PL switch in FM position Sensitivity 20 MHz V6 FM NORM PL switch in PL position Sensitivity 6 MHz V Maximum Deviation for Modulation Frequencies DC to 200 Hz 75 MHz 200 Hz to 200 kHz 5 MHz Internal AM Below maximum leveled power 1 kHz squarewave ON OFF Ratio gt 25 dB External AM 2 At 3 dB below maximum power output Sensitivity to 10V input gt 25 dB All specifications are at 0 to 55 degrees C except where noted and at RF output jack Allow 30 minutes warmup time See also the Supplemental Characteristics Table 1 2 Approach desired frequency from low frequency end of band Excluding coupler and detector variation Use HP Model 431B 431 and 432A power meters Sweep durations gt 10 seconds A positive input voltage decreases frequency It may be necessary to calibrate the 862650 in the 620 mainframe in which it will be used Refer to the adjustment section paragraph 5 14 General Information TM 11 6625 2917
151. ted Be very careful the energy at many points in the instrument may if contacted eause personal injury CAUTION BEFORE SWITCHING THIS INSTRUNIENT ON ensure that all devices connected to the instrument are connected to the protective earth ground 1 16 INSTRUMENTS COVERED BY MANUAL 1 17 Attached to the instrument is a serial number plate Figure 1 2 The serial number is in two parts The first four digits and the letter are the serial number prefix the last five digits are the suffix The prefix is the same for all identical instruments it changes only when a change is made to the instrument suffix however is assigned sequentially and is different for each instrument contents of this manual apply to instruments with the serial number prefix ea listed under SERIAL NUMBERS on the title page 1 18 An instrument manufactured after the printing of this manual may have a serial number prefix that is not listed on the page This unlisted serial prefix indicates the instrument is different from those de scribed in this manual The manual for this newer instrument is accompanied by a Manual Changes supplement This supplement contains change information that explains how to adapt the manual to the newer instrument TM 11 6625 2917 14 amp P 14 Model 8620A Figure 1 2 Serial Number Plate SERIAL NUMBER PREFIX NTE 1239400285 SUFFIX HEWLETT PACKARD MADE IN USA 1 19 In addition to chan
152. ternally Leveled lt 0 7 dB Page 3 3 Figure 3 11 Replacd Figure 3 1 with Page 3 4 Figure 3 21 Replace Figure 3 2 With Figure 10 2 Sections Change all connections to the front panel RF OUTPUT connector in test setups to the rear panel RF OUT connector Change SPECIFICATION to Maximum Leveled Power Option 001 gt 46 0 dBm 4 mW Add Power Variation at Maximum Leveled Power Internally Leveled Option 001 0 7 dB g 0 Paragraph 4 10 Add after step n the Performance Test for Internal Leveling 86260A Option 001 steps o through t in Section IX Add the following after step n q Internally leveled maximum output power Lower Limit 6 dBm t Internally leveled variation Upper Limit 1 4 dB p p 86260 Option 001 004 1 2 3 4 FRONT PANEL FEATURES 2 9 POWER LEVEL 3 8 ALC RF ON OFF switch S1 Turns RF power on 5 ALC GAIN control R2 Adjusts output of ALC and off Resets oscillator bias voltage when amplifier when using external leveling turned to off then on again 6 ALC switch S2 Selects INT internal EXT UNLEVELED light DS1 Lights when not in an external or MTR power meter power leveling automatic leveling mode or when in a leveling modes In OFF position RF is not leveled mode and RF output is not level across the band NOTE With Option 004 installed the RF POWER LEVEL control R1 Adjusts RF power OUTPUT
153. the supply The next check that can be made if it is known that the transistor is not operating in a saturated condition is to check for a voltage drop between emitter and collector Obviously these serve only as quick checks and will help in getting started with the problem When an operational amplifier is suspected of being bad and since the inputs should not draw current a test can be made by inserting some resistance in series with the input and checking for a voltage drop across the resistor If there is a voltage drop the operational amplifier should be replaced 8 19 RECOMMENDED TEST EQUIPMENT 8 20 Test equipment and accessories required to maintain the Model 86260A are listed in If the equipment listed is not available equipment that meets the minimum specifications shown may be substituted 8 21 REPA1R 8 22 Service Accessories 8 23 Service accessories HP Part No 08620 60030 is available as an aid in maintaining the Model 86260A and the 8620A mainframe These accessories described ir Paragraph 1 41 and shown in Figure 1 3 8 24 Cleaning Switches 8 25 cleaning agent to be used the switches is isopropyl alcohol HP Part No 8600 0755 Spray the solvent into the switch and slide or rotate the switch back and forth Repeat this procedure several times continue to slide or rotate the switch back and forth until the solvent is evaporated 8 26 YIG Tuned Oscillator Installation 8 27 When installing a
154. tion germanium gigahertz high frequency mercury Hewlett Packard high pass filter hour used in frequency MINminimum INCDincandescent include s insulation All abbreviations in the parts list will be in upper case 6 2 Model 86260A integrated circuit microcircuit electron tube voltage regulator breakdown diode cable transmission path wire crystal unit piezo electric or quartz tuned cavity tuned circuit internal kilogram kilohertz kilovolt inductance capacitance light emitting low frequency linear lock washer low local oscillator logarithmic taper used in parts list logrithm ic low pass filter low voltage distance milliampere maximum meg 106 used metal film metallic oxide medium frequency microfarad used In parts list manufacturer milligram megahertz millihenry minute time miniature millimeter Replaceable Parts modulator momentary metal oxide semiconductor millisecond mounting meter indicating device millivolt millivolt ac millivolt millivolt peak millivolt peak to peak millivolt rms milliwatt multiplex mylar microampere microfarad microhenry micromho microsecond microvolt microvolt ac microvolt dc peak HVp p microvolt peak to peak rms microwatt nanoampere no connection normally closed
155. tor to precess or rotate about the axis that is parallel to HO See 8 12 The rate of precession or rotation is at the frequency of the RF field The unique characteristic of the YIG sphere is that it has a natural or inherent ferrimagnetic resonant frequency determined by the magnetic field The angle of precession will only be large at the resonant frequency At all other excitation frequencies of resonance this angle will be very small That is it will not support oscillations at other than its ferrimagnetic resonant frequency See Figure 8 4 Figure 8 1 YIG Sphere Field Figure 8 2 YIG Sphere Magnetic Field Figure 8 3 Net Magnetization Vector Figure 8 4 Magnetization Vector with RF Field Applied Service 8 13 second unique characteristic of the is that this natural resonant frequency is a linear function of the strength of the dc magnetic field Thus the resonant frequency of the YIG sphere is tunable by varying the dc current through the electromagnet that produces Ho See 8 14 The small YIG sphere is positioned directly between the poles of an electromagnet The current through the electromagnet is varied by the tuning voltage or sweep ramp The high frequency transistor oscillator is coupled to the YIG sphere by a single loop of flat wire See Figure 8 6 Figure 8 5 Increased DC Magnetic Field Figure 8 6 Coupling RF and
156. ts accessories 2 3 INITIAL INSPECTION 2 4 Inspect the shipping container for damage If the shipping container or cushioning material is damaged it should be kept until the contents of the shipment have been checked for completeness and the instrument has been checked mechanically and electrically The contents of the shipment should be shown in Figure 1 1 and procedures for checking electrical performance are given in Section IV 2 5 PREPARATION FOR USE 2 6 Power Source 2 7 When the Model 86260A RF Plug in is properly installed it obtains all necessary power through the rear connector from the HP Model 8620A or 8620B Sweep Oscillator mainframe 2 8 Interconnections 2 9 For the Model 86260A HF Plug in to operate it must be plugged into an 8620A or 8620B main frame Connection is made by pushing the RF Plug in into the mainframe so that the plug in interface connector P1 mates with the mainframe connector J6 2 10 Mating Connectors 2 11 The mating connectors used in the HP Model 86260A RF Plug in are shown in Table 2 1 This table identifies each connector and gives the HP Part Number and a part number of an alternate source Table 2 1 Model 86260A Mating Connectors Industry HP Part Alternate Connector Identification Number Source RF OUTPUT J2 Type N FM Input J4 BNC ALC EXT INPUT J3 FREQ REF J5 Micro Ribbon 36 Contact Rack and Panel Plug Interface P2 1250 0118 1250 0118
157. typical performance characteristics for information to the user 1 7 General Information Sweep Oscillator Spectrum Analyzer Oscilloscope Frequency Counter Frequency Meter Test Oscillator DC Digital Voltmeter Power Meter and Ther miitor Mount RMS Voltmeter Directional Coupler Crystal Detector DC Power Supply Adjustable AC Line Transformer TM 11 6625 2917 14 amp P 14 Model 86260A Table 1 3 Recommended Test Equipment 1 of 2 Instrument Critical Specifications Recommended Model Only Substitute 86208 Frequency Range 12 4 to 40 GHz Vertical bandwidth 20 MHz minimum Vertical Sensitivity 5 mV Div Horizontal Sweep Rate uS Div maximum Range 12 4 to 18 0 GHz Range 12 4 to 18 0 GHz Frequency 10 Hz to 2 MHz Output 3 16V into 600 1 Range 50V to 50V Accuracy 0 05 Frequency 12 4 to 18 0 GHz Rage 10 dBm to 20 dBm Scale RMS volts Accuracy 5 Frequency Range 10 Hz to 2 MHz Coupling 20 dB Frequency Range 12 4 to 18 0 GHz Frequency 12 4 to 18 0 GHz SWR lt 1 7 Connector Type N Range 0 to 10 Vdc Current 0 Amp Output 100 to 150 Vac Power 150 watts HP 8620A HP 8555A 8552B 141 180 1801 1820 5340 P532A 651 3460 432 8478 3400 7790 8470 012 721 General Radio 11 6625 2917 148 14 86260 General
158. uce power output until trace is level across band as shown in If external preamplifier gain is too high oscillations may occur as shown in Figure 3 6 To remove oscillations reduce external preamplifier gain by turning ALC GAIN 11 control counterclockwise Figure 3 7 External Crystal Detector Leveling 2 of 2 3 9 11 6625 2917 148 14 Operation Model 86260A POWER METER LEVELING OPERATION SWEEP OSCILLATOR RF PLUG IN POWER METER OSCILLOSCOPE Sweep Oscillator HP 8620A RF Plug in HP 86260A Oscilloscope Power Meter Thermistor Mount 10 dB Attenuator PROCEDURE 1 Connect equipment as shown test setup above Set controls as follows 8620A START green 1 STOP red 7 MARKER 15 TRIGGER 16 TIME SECONDS 14 1 KHZ SQ WV OFF Rear Panel RF BLANKING OFF Rear Panel Figure 3 8 Power Meter Leveling Operation 1 of 2 3 10 86260 Operation POWER METER LEVELING OPERATION 86260A Press 8620A LINE pushbutton switch 19 to turn instrument on The LINE switch 19 and START STOP pushbuttons 1 7 should light indicating START STOP sweep mode is selected Adjust power meter range to obtain upscale indication near top 1 3 of meter deflection range One of the conditions shown in Figure 3 4 through 3 6 should be displayed on oscilloscope If trace is unleveled as shown in Figure 3 4 turn POWER LEVEL control 10 counterclockwise to reduce power output until trace is level across band as s
159. ug in is amplitude modulated with a squarewave from the 8620A This modulated signal is used to establish reference on the Model 3400A RMS Voltmeter that is 9 dB below the actual carrier signal The 9 dIB reduction occurs because of the voltmeter response to a squarewave and the square law response of the crystal detector The modulation is then removed and the magnitude of the Residual AM component is measured with respect to the established reference 4 12 86260 Performance Tests PERFORMANCE TESTS 4 12 RESIDUAL AM Cont d SWEEP RMS VOLTMETER OSCILLATOR RF SECTION RF OUTPUT 10 dB CRYSTAL ATTENUATOR DETECTOR 2 FT CABLE EQUIPMENT SWEEP 8620 86260 10 dB 84918 Option 010 RMS dti 3400 Crystal Detector eene HP 8470A Option 012 2 foot BNC Cable HP 11086A PROCEDURE a Connect equipment as shown in b Set controls as follows 8620A BANDE deii RI ep EIUS 12 4 to 18 0 GHz mullo 15 2 GHz 1 KHZ SQ WV OFF Rear Panel 1 KHZ SQ WV RF BLANKING OFF Rear Panel RF BLANKING 86260A POWER LEVEL 2 iere Fully clockwise C Set 8620A LINE switch to ON press CW pushbutton Set RMS voltmeter to a range that gives an on scale indication Note meter indication d Set 8620A rear panel KHZ SQ WV OFF switc
160. ut connector mounted on the rear panel Type N for all instruments except Option 001 004 The differences in the front and rear panels with Option 004 installed are shown in and 10 2 10 5 OPTION 004 MANUAL CHANGES 10 6 The following changes and additions provide information to show the differences in the RF Plug in with Option 004 installed Page 3 3j Figure 3 11 Replace Figure 3 1 with Figure 10 1 Delete description for item 7 and add NOTE 1 as follows With Option 004 installed the RF OUTPUT connector J6 is on the rear panel Replace Figure 3 2 with Figure 10 2 Sections II Change all connections to the front panel RF OUTPUT connector test setups to the rear panel RF OUT connector 6 7 Table 6 2 Delete W1 Page 6 8l Table 6 2 Delete HP Part Number 86260 00002 Panel Front Lower 8 11 Figure 8 12 8 14 Figure 8 14 Change W1 to W2 and W14J1 to J6 Change RF OUTPUT to RF OUT 8 17 Figure 8 16 Add Figure 10 319 Figure 8 16 Page 8 17 Add Figure 10 4 10 1 86260 Option 004 FRONT PANEL FEATURES 8g tees 2 POWER LEVEL Figure 10 1 Front Panel Controls Connector and Indicator Option 004 10 2 86260 Option 004 SINK REAR PANEL FEATURES FREQ RE Figure 10 2 Rear Panel Connectors and Controls Option 004 10 3

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