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HP 11793A User's Manual

1. Mechanical Options Instruments with Serial Prefix 2407A have System II cabinet parts and hardware that are English thread Instruments with Serial Prefix 2520A and higher have System II cabinet parts and hardware that are METRIC thread When ordering Option 907 908 or 909 for instruments with serial number prefix 2407A English thread use the HP part number in parenthesis Option 907 Front Handle Kit Ease of handling is increased with front panel handles To retrofit a standard instrument order HP part number 5061 9688 5061 0088 Option 908 Rack Flange Kit All necessary hardware and installation instructions are included to enable mounting of the Microwave Converter in a rack with 482 mm standard 19 in spacing To retrofit a standard instrument order HP part number 5061 9674 5061 0074 which has standard 4 45 cm 1 75 in hole spacing Option 909 Rack Flange and Front Handle Combination Kit This kit is not simply front handle kit and rack flange kit packaged together The combination is made up of unique parts which include both functions To retrofit a standard instrument order HP part number 5061 9675 5061 0075 which has 4 45 cm 1 75 in hole spacing and is a standard flange Microwave Converter Model 11793A Option 907 Option 908 Option 909 Front Handle Kit Rack Flange Kit Rack Flange and Front Handie Combination Kit Figure 2 Rack Mounting Options Accessories Supplied The accessories suppli
2. OUT PATH 2 RF INPUT SWITCH LO AMPLIFIER IN PATH 43 AF INPUT OPTIONS 004 AND 011 ONLY 15 IRF INPUT 1 gt lt OPTION 02 ONLY 800 MHz U2 1548 ATi 368 FL1 LOW ATTENUATOR MIXER PASS FILTER AME LITTER RF yp LO C83 OPTIONAL LO AMPLIFIER AND SWITCH 91 LO C32 AMPLIFIER SWITCH LEFT SIDE W4 LO INPUT amp A OPTION 001 ONL Y RIGHT SIDE 44 wia NOTE 4 LO INPUT 5 X OPTION O44 ONLY Ut HF LO AMPLIFIER da 18 26 BHz NOTE 3 p w ILO INPUT i OPTION 021 ONLY Figure 12 Je IF gt R OPTIONS 001 1 AND 044 ONLY J7 __ E dE gt lt OPTION 024 ONLY NOTE 4 552 INPUT SIGNAL DOWN CONVERTER Schematic Diagram for Options 001 011 and 021 41 NOTES 84 a4 TOP BOTTOM VIEW VIEW CATHODE GATE GND CATHODE ANODE VA3 O 3 CASE VR4 3 59 1 J8 TOP BOTTOM FREG W43 VIEW VIEW OFFSET INPUT 1 SWITCH CONTROL ASSEMBLY 11793 6 5 CRB C7 ponu CA7 P B s s rp h w ww du n3 wo I 26V FULL WAVE RECTIFIER 4 Ee e et ey U UE SERIAL PREFIX 2407 LEVEL COMPARATOR DECODER SWITCH D
3. At Agilent Technologies we are working diligently to make this transition as smooth as possible for you However as a result of this transition the products and related documentation contained in this shipment may be labeled with either the Hewlett Packard name and logo the Agilent Technologies name and logo or a combination of both Information in this package may refer to Hewlett Packard HP but applies to your Agilent Technologies product Hewlett Packard and Agilent branded products with the same model number are interchangeable Whatever logo you see the information products and services come from the same reliable source If you have questions about Agilent Technologies products and services please visit our website at http www agilent com Sincerely Rebranding Team HP 11793A MICROWAVE CONVERTER SERIAL NUMBERS This manual applies directly to instruments with serial numbers prefixed 2520A With changes described in Paragraph 31 this manal also applies to instruments with serial numbers pre fixed 2407A For additional important information about serial numbers see INSTRUMENTS COVERED BY THIS MANUAL Paragraph 4 First Edition HEWLETT PACKARD COMPANY 1985 EAST 24001 MISSION AVENUE TAF C 34 SPOKANE WASHINGTON U S A 99220 Operating and Service Manual Part No 11793 90011 Microfiche Operating and Service Manual Part No 11793 90012 Printed MAY 1985 HEWLETT PACKARD 1 Regula
4. 0515 0445 11793 60002 0515 0446 9100 4014 0515 1137 2190 0584 3050 0891 7120 4559 Indicates factory selected value W Replaceable Parts Reference Designation U1 92 U3 1 We u4 us UB Uu ug Wg 10 11 W12 W13 14 15 16 17 18 419 20 421 22 See introduction to this section for ordering information 18 HP Part Number 0355 0218 0520 0130 0955 0237 0520 0133 2190 0045 2850 0132 0955 0217 0515 0580 2190 0584 3050 0891 11783 20002 11793 20003 11793 20004 11793 20101 11783 20103 11793 20102 11793 60013 11793 60013 11793 20104 11793 50011 0515 1084 0535 0004 2180 0584 11793 60012 11793 60007 0535 0004 2190 0584 11793 60010 1250 0952 1250 0958 1250 0960 1250 0964 1400 0025 2190 0102 2950 0035 11793 20106 11793 20107 11793 20108 11793 20109 11793 20110 11783 20111 11793 60009 11793 60006 8120 1838 n O cn O p O gt 4 m CO C 3 6 O CO Cn O tO e re FPR BREE Table 7 Replaceable Parts Description AMPLIFIER MICROWAVE FREQ RANGE 18GHZ TO OPTIONS 001 011 AND 021 ONLY SCREW MACH 2 56 375 IN LG PRN HD POZ7I AMPLIFIER RF MOD SMA SCREW MACH 2 56 5 IN LG PRN HD POZI URSHER LK HLCL NO 2 088 IN ID NUT HEX DBL CHRM 7 16 28 THD 094 IN THK MIXER MICROWAVE FREQ RANGE LO 2 0GHZ SCREW MACH X 0 5 6MM LG PRN HD WASHER LK HLCL 3 0 MM 3 1 MM
5. Address DALLAS PHOENTX TINLEY PARK RALEIGH BRADFORD GREENWOOD SANTA CLARA PALO ALTO SOMERVILLE NORTH ADAMS BROADVIEW Zip Code 19 Microwave Converter Model 11793A MP6 MP4 NOTE MP21 AND MP22 ARE HOLE PLUGS Figure 6 Cabinet Parts 29 Microwave Converter Mode 11793A W1 Standard W19 Option 010 U3 Under MP18 MP18 25 ATI cO e m A m cN u C 25 Figure 7 Illustrated Parts Breakdown for Standard and Option 010 W17 Option 020 J1 F1 Microwave Converter Option 001 only W4 Option 001 only W6 U1 MP18 U3 4 2 J4 Option 011 only W14 Option 011 only Under J6 Option 021 only W18 Option 021 only W5 W9 MP17 18 MP25 farm MP14 MP15 Gasket Al MP20 W13 e Ti F1 SSRN Figure 8 Illustrated Parts Breakdown for Options 001 and 011 22 5 t f H H z z T ANNE ANNA NN VAM lt Model 11793A 52 W8 W11 J11 W7 U2 MP13 FL1 MP16 Model 11793A Microwave Converter 30 Ordering Information To order a part listed in the replaceable parts table include the Hewlett Packard part number with the check digit and the quantity required Address your order to the nearest Hewlett Packard office The check digit will ensure accurate and timely processing of your order To order a part that 1s
6. OPERATING AND SERVICE MANUAL HP 11793A MIGROWAVE GONVERTER September 1990 7 EW LE TT 11793 90011 LA PACKARD CERTIFICATION Hewlett Packard Company certifies that this product met its published specifications at the time of shipment from the factory Hewlett Packard further certifies that its calibration measurements are traceable to the United States National Bureau of Standards to the extent allowed by the Bureau s calibration facility and to the calibration facilities of other International Standards Organization members WARRANTY This Hewlett Packard instrument product is warranted against defects in material and workmanship for a period of one year from date of shipment During the warranty period Hewlett Packard Company will at its option either repair or replace products which prove to be defective For warranty service or repair this product must be returned to a service facility designated by HP Buyer shall prepay shipping charges to HP and HP shall pay shipping charges to return the product to Buyer However Buyer shall pay all shipping charges duties and taxes for products returned to HP from another country HP warrants that its software and firmware designated by HP for use with an instrument will execute its programming instructions when properly installed on that instrument HP does not warrant that the operation of the instrument or software or firmware will be uninterrupted or error free
7. Connect W7 to U3 and FL1 Connect W8 to U2 and 52 port 4 Secure module cover to base Snug the screws down finger tight then tighten the screws working from the center out Connect W12 to A 1J1 42 RF Module Assembly Procedure for Option 001 011 amp 021 Instruments 34 l 2 For Spira Shield RF gasket replacement refer to step 1 under Paragraph 41 above Wrap and solder the control wires to the 51 and S2 terminals as follows blue to 51 terminal 1 yellow to 51 terminal 2 white red to 51 terminal green to S2 terminal 1 brown to S2 terminal 2 orange white red to S2 terminal C With the cable slots of MP14 RF module facing towards the assembler mount S1 label up and the ports pointing to the center of the module in the right side of the module base mount S2 in the left side of the module base Secure the switches with the four long Torxhead screws Connect AT to S2 port 1 Connect U3 to the mixer bracket ensuring that the mixer side port which connects to the IF output faces opposite to the bracket mounting holes Connect U3 to AT1 but do not tighten Model 11793A Microwave Converter 13 14 16 17 18 19 20 21 22 23 24 NOTE Mixer construction varies with manufacturer and thus i assembled within the RF Module differently For example a Norsal mixer has a stiffener bar placed between the mixer mounting bracket and the base mounting castings An RHG mixer
8. Egypt unpolarized in many nations 125V 8120 1378 8120 1398 8120 1754 8120 1378 8120 1521 8120 1676 8120 2104 8120 0698 8120 1957 8120 2956 Gray 79 Gray 8120 4211 South Africa India 8120 1860 Part number shown for plug is industry identifier for plug only Number shown for cable is HP Part Number for complete cable including plug E Earth Ground L Line Straight NEMA5 15P 80 Black United States 90 80 Black Canada Mexico Straight NEMA5 15P 36 Black Japan 100V or Straight NEMA5 15P 80 Jade Gray 200V Philippines 90 80 Jade Gray Taiwan Straight NEMA5 15P 36 Jade Gray Straight SEV1011 79 Gray 1959 24507 Type 12 United States Canada Straight NEMA6 15P Straight DHCK107 90 Straight IEC83 B1 Straight CEE22 VI Systems Cabinet Use N Neutral Microwave Converter Model 11793A 14 Operating Environment The operating environment should be within the following limitations Temperature 09 to 55 Humidiiy IER lt 95 relative at 40 Altitude o iocos 4570 meters 15 000 feet 15 Bench Operation The instrument cabinet has plastic feet which are shaped to insure self alignment when stacked in a system configuration 16 Rack Mounting Rack mounting information 15 provided with the rack mounting Kits If the kits were not ordered with the instrume
9. GHz 8 dBm to 13 dBm 29180 Without Option 001 011 021 7 dBm to 13 dBm 18 to 26 5 Without Option 001 011 or 021 0 dBm to 5 dBm 18 to 26 5 With Option 001 011 or 021 Table 2 Supplemental Characteristics RF Input Connector Precision 3 5 mm male LO Input Connector Precision 3 5 mm male IF Output Connector Type N female Rear Panel Control Connector BNC female Dimensions Height 88 mm 3 5 in Width 425 mm 16 7 in Depth 528 mm 20 8 in HP System Module Size Height 88 mm 3 5 in Width 1 Modular Width Depth 508 mm 20 in Microwave Converter Mode 11793A 3 Safety Considerations This product is a Safety Class I instrument that is one provided with a prctective earth terminal The Microwave Converter and all related documentation must be reviewed before operation for complete familiarization with safety markings and instructions Refer to the Safety Considerations page found at the beginning of this manual for a summary of the safety information Safety information pertinent to the task at hand that is installation operation performance testing or service is found throughout this manual 4 Instruments Covered by This Manual This instrument has a two part serial number The first four digits and the letter comprise the serial number prefix The prefix 1s the same for all identical instruments it changes only when a change is made to the instrument The last five digits form a s
10. Snug the screws down finger tight then tighten the screws working from the center out Connect W 12 to A1J1 35 MICROWAVE SIGNAL DOWN CONVERSION y c 7 2 01 DIRECT PATH i L INPUT OUTPUT 348 AF LOW P di CONTROL ASSEMBLY dB PASS AMP x DOWN DOWN CONVERT ATTENUATOR MIXER FILTER DECODEA SWITCH I LEVEL COMPARATOR DRIVER l pa E 52 I Y INPUT 8 eae 51 I iss 0 26V FULL WAVE LO AMP RECTIFIER i POWER 26 0 j TRANSFDAMER UNREGULATED 024 ONLY 1 ig HII diis L 5V m LO AMP OUT i 2 c BD 1 Figure 10 MICROWAVE CONVERTER Simplified Block Diagram 37 38 FROM 1 SWITCH CONTROL 3 4 NOTES ALL CIRCUITRY EXGEPT W12 IS IN R F I SHIELDED MDDULE 49 AND J10 ARE PART OF Wi2 AND W10 RESPECTIVELY AND CANNOT BE ORDERED SEPARATELY OPTION PLACEMENT OF CONNECTORS FRONT PANEL REAR PANEL LO INPUT PLACEMENT OF ALL i RIGHT CONNECTIONS T E SEE FIGURE 7 FOR HELP IN LOCATION AND IDENTIFICATIQN 1 TQ SWITCHES 4 2 mi SIGNAL DIRECT PATH SIGNAL VERT PAT DOWN CONVER H 42V T S ED AMPLIFIER 4 NG 6 NC NC 82 W3 AF INPUT gt lt
11. 1s damaged the shipping materials should be kept until the contents of the shipment have been checked for completeness and the instrument has been checked mechanically and electrically If there 1s mechanical damage or if the instrument does not pass the performance tests notify the nearest Hewlett Packard office Keep the damaged shipping materials if any for inspection by the carrier and a Hewlett Packard representative Microwave Converter 11793A 10 Power Requirements The Microwave Converter requires power source of 115 230 Vac 10 20 48 to 66 Hz Power consumption is 20 VA maximum CAUTION Before the instrument is plugged in it must be set to the voltage of the power source or damage to the instrument may result 11 Line Voltage Selection A line voltage switch enables selection of either 115V or 230V line voltage 15 indicated on this rear panel switch Slide the switch to the proper line voltage for operation BEFORE CONNECTING THIS INSTRUMENT the protective earth terminal of the instrument must be connected to the protective conductor of the Mains power cord The Mains plug shall only be inserted in a socket outlet provided with a protective earth contact The protective action must not be negated by the use of an extension cord power cable without a protective conductor grounding Grounding one conductor of a two conductor outlet is not sufficient protection 12 Power Cables This
12. 2 4101 0515 0655 4 SCREW MACH M3 X 0 5 8MM LG 00000 ORDER 8Y DESCRIPTION 1854 0477 7 TRANSISTOR NPN 2N2222A SI TO 18 500 04713 2N2222A 1854 0477 7 TRANSISTOR NPN 2N2222A SI 70 18 PD 500MU 04713 2322228 1854 0477 7 TRANSISTOR NPN 2322224 SI TO 18 PD 500MU 04713 2N2222A 1854 0477 7 TRANSISTOR NPN 2N2222A SI TO 18 500 04713 2 222268 0757 0821 8 RESISTOR 1 21 1 5 F TC 0 100 28480 0757 0821 0698 3442 9 RESISTOR 237 1 125 F TC 0 100 24546 C4 1 8 T0 237R F 0698 3442 8 RESISTOR 237 1 125 F TC 0 100 24546 C4 1 8 T0 237R F 0598 3442 9 RESISTOR 237 1 125U F TC 0 100 24546 C4 1 8 T0 237R F 2100 0568 1 RESISTOR TRMR 100 10 C TOP ADJ 1 TRN 28480 2100 0568 0698 3150 6 RESISTOR 2 37K 1 125U F TC 0 100 24546 C4 1 8 T0 2371 F 0757 0984 4 RESISTOR 10 1 5U F TC 0 100 28480 0757 0984 0698 3150 6 RESISTOR 2 37K 1 125U F TC 0 100 24546 C4 1 8 T0 2371 F 0757 0438 3 RESISTOR 5 11K 1 125W F TC 0 100 24546 C4 1 8 T0 5111 F 0638 3150 6 RESISTOR 2 37K 1 1254 F 0 100 24545 4 1 8 70 2371 0757 0444 1 RESISTOR 12 1K 1 125W F TC 0 100 24546 C4 1 8 T0 1212 F 0698 3150 6 RESISTOR 2 37K 1 125 F TC 0 100 24545 4 1 8 0 2371 0698 3150 6 RESISTOR 2 37K 1 185U F 0 100 24545 4 1 8 0 2371 0598 3150 2 RESISTOR 2 37K 1X 125U F TC 0 100 24546 C4 1 8 T0 2371 F 0698 3150 5 RESISTOR 2 37K 1 125U
13. ID WASHER FL MTLC 3 0 MM 3 3 MM ID LO INPUT CABLE SEMI RIGID Ji TO U3 STANDARD ONLY IF OUTPUT CABLE SEMI RIGIO 72 TO 52 4 AND OPTIONS 001 010 AND 011 NL Y RF INPUT CABLE SEMI RIGID 73 TO 52 aia AND OPTIONS 001 010 AND 011 NLY LO INPUT CABLE SEMI RIGIO Ji TO Si LEFT SIOE OPTION 001 ONLY LO AMPLIFIER OUTPUT CABLE SEMI RIGID Ui TO Si OPTIONS 003 011 AND 021 ONLY MIXER INPUT CABLE SEMI RIGID 51 TO U3 OPTIONS 001 011 AND 021 ONLY MIXER OUTPUT CABLE ASSEMBLY FLEX CORX 912 U3 TO FL1 IF AMPLIFIER OUTPUT CABLE ASSEMBLY FLEX CORX 912 92 TO 52 LO AMPLIFIER INPUT CABLE SEMI RIGID 51 TO 01 OPTIONS 001 011 AND 021 ONLY MODULE HARNESS ASSEMBLY STANDARD AND OPTIONS 010 AND 020 ONLY SCREW MACH M3 X 0 5 L2MM LG NUT HEX DBL CHAM M3 X 0 5 2 4MM THK URSHER LK HLCL 3 0 MM 3 1 MM ID MODULE HRRNESS RSSEMBLY OPTIONS 001 011 AND 021 ONLY MODULE CABLE FLAT 8121 TO J9 NUT HEX DBL CHAM M3 X 0 5 2 4MM THK WASHER LK HLCL 3 0 MM 3 1 MM ID CABLE ASSEMBLY COAX J8 TO R1 CONTRCT RF CONN BNC TNC FEM CTR BUSHING RF CONN BNC TNC FOR INTL SLEEVE RF CONN SER BNC TNC NUT RF CONN BNC TNC CLRMP NUT FOR CLRMP CRBLE 5 DIA 5 UD NYL WASHER LK INTL T 15 32 IN 472 IN ID NUT HEX DBL CHRM 15 32 32 THD LO INPUT CABLE SEMI RIGID 24 TO S1 RIGHT SIDE OPTION 011 ONLY RF INPUT CRBLE SEMI RIGID 75 TO 51 OPTIONS 020 RND 021 ONLY IF OUTPUT CABLE SEMI RIGID 27 TO 52 OPTIONS 020 AND 021 ON
14. LIMITATION OF WARRANTY The foregoing warranty shall not apply to defects resulting from improper or inadequate maintenance by Buyer Buyer supplied software or interfacing unauthorized modification or misuse operation outside of the environmental specifications for the product or improper site preparation or maintenance NO OTHER WARRANTY IS EXPRESSED OR IMPLIED HP SPECIFICALLY DISCLAIMS THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE EXCLUSIVE REMEDIES THE REMEDIES PROVIDED HEREIN ARE BUYER S SOLE AND EXCLUSIVE REMEDIES HP SHALL NOT BE LIABLE FOR ANY DIRECT INDIRECT SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES WHETHER BASED ON CONTRACT TORT OR ANY OTHER LEGAL THEORY ASSISTANCE Product maintenance agreements and other customer assistance agreements are available for Hewlett Packard products For any assistance contact your nearest Hewlett Packard Sales and Service Office Addresses are provided at the back of this manual Agilent Technologies Inc www agilent com 24001 E Mission Liberty Lake WA 99019 Agilent Technologies 7 Innovating the HP Way June 8 2000 Dear Customer As of November 1 1999 four of Hewlett Packard s businesses test and measurement semiconductor products health care solutions and chemical analysis became a new company Agilent Technologies Now many of your Hewlett Packard products and services are in the care of Agilent Technologies
15. an on off switch or front panel power indicator light Power is supplied to the instrument as soon as the power cord is plugged in to the line voltage source Microwave Converter Model 11793A HP 8902A MEASURING RECEIVER FREQUENCY OFFSET TTL OUTPUT SENSOR anus ancooa NPUT o FREQUENCY OFFSET MODE INPUT IF OUTPUT EXTERNAL 11793A MICROWAVE MICROWAVE LO o DOWN CONVERTER MICROWAVE 117924 SIGNAL SENSOR SOURCE Ri MODULE Figure 3 Microwave Converter Interconnections and Typical Test Setup 21 Panel Features Front panel features consist of the LO input RF input and the IF output connectors For Options 020 and 021 the connectors are located on the rear panel See Figure 4 Front Panel Features for the standard locations of front panel connectors Rear panel features are the Line Voltage Select Switch Fuse Power Cord and the Frequency Offset input connectors See Figure 5 Rear Panel Features 22 Operator Checks Operator s checks consist of insuring that a fuse of proper value is installed that the power cord 1s plugged in that the signal control lines are connected and that both the measuring instrument and the external LO are connected and turned on 23 Operator Maintenance The only maintenance needed by the Microwave Converter is replacement of the primary power fuse To replace the fuse insert a standard screwdriver into the fuseholder and push in ag
16. and cables Table 10 Performance Parameters Device Performance Parameters to Check AT1 Attenuation 2 5 to 3 5 dB at 18 GHz 3 dB 2 0 to 4 0 dB at 26 5 GHz Attenuator SWR lt 1 25 1 at 26 5 GHz FL1 3 dB Corner 900 to 1100 MHz Low Pass Passband Insertion Loss 0 25 dB at 800 MHz Filter 1 2 Insertion Loss lt 1 5 dB at 26 5 GHz Switch SWR lt 2 0 1 at 26 5 GHz 01 Frequency Range 18 26 5 GHz LO Gain gt 11 dB Amplifier SWR lt 2 5 1 U2 Frequency Range 10 to 700 MHz IF Gain 14 dB Amplifier SWR lt 1 8 1 LO Frequency Range 2 to 26 5 GHz RF Frequency Range 1 3 to 26 5 GHz LO Power gt 8 dBm Conversion Loss lt 10 dB SWR lt 4 1 Control Devices Service Sheet 3 Set a power supply to 0 Vdc and connect 1 to the FREQ OFFSET INPUT connector Set the supply to 0 3 and 5 Vdc respectively and compare the logic levels of the logic devices with those listed in Table 9 When specifically checking the drive transistors Q2 Q3 Q4 or Q5 note the following The switch solenoids automatically disconnect after completion of switching Therefore it is difficult to distinguish between a drive transistor that is on but not drawing current or one that is off and not drawing current The collector voltages will differ by only a few mV If any of the transistors are known to be working compare the on and off voltages of the suspected transistor against those of a known good one Power Supplies Servic
17. dissipated in the cabinet If the total power dissipated in the cabinet is greater than 800 watts then forced convection must be used Product Markings CE the CE mark is a registered trademark of the European Community A CE mark accompanied by a year indicated the year the design was proven CSA the CSA mark is a registered trademark of the Canadian Standards Association 4 Chapter 1 Model li Safety Considerations SAFETY CONSIDERATIONS GENERAL This product and related documentation must be reviewed before operation for familiarization with safety markings and instructions This product is a Safety Class I instrument pro vided with a protective earth terminal BEFORE APPLYING POWER Verify that the product is set to match the available line voltage and the correct fuse is installed SAFETY EARTH GROUND An uninterruptible safety earth ground must be provided from the main power source to the prod uct input wiring terminals power cord or supplied power cord set SAFETY SYMBOLS Instruction manual symbol the product will be marked with this symbol when it is necessary for the user to refer to the instruction manual refer to Table of Contents 5 Indicates hazardous voltages l Indicates earth ground terminal The WARNING sign denotes hazard It calls attention to a procedure practice or the like which if not cor rectly performed or adhered to could result in per sonal
18. instrument is provided with a three wire power cable When connected to an appropriate ac power receptacle this cable grounds the instrument cabinet The type of power cable plug shipped with the instrument depends on the country of destination See Table 5 for part numbers of the available power cables and Mains plugs 13 Mating Connectors All coaxial connectors except the RF Input used with the Microwave Converter are provided on the three accessory cables supplied with the instrument listed under Paragraph 6 Accessories Supplied The RF Input connector should be of the APC 3 5 mm female 50 ohm type Refer to Table 2 Supplemental Characteristics for the correct type and location for mating each connector Use the correct torque wrench when installing sub miniature connectors Tighten 3 5 mm connectors to 0 7 Nm 6 3 inlb Tighten Type N connectors to 0 7 6 3 inb Model 11793A Microwave Converter Table 2 2 Power Cables Available Cable Cable Plug Cable For Use CE RUNE dma n Country 90 Mint Gray United Kingdom Mint Gray Cyprus Nigeria Rhodesia 8120 1351 8120 1703 0 Straight BS1363A 909 4 250V e L N oo 250V 250V 8120 1689 8120 1692 8120 1369 8120 0696 Straight NZSS198 ASC112 90 79 Gray Austrailia 87 Gray New Zealand Straight CEE7 Y11 90 79 Mint Gray East and West 79 Mint Gray Europe Saudi Arabia
19. left and slide into the main chassis through the front frame the two notches indicate the bottom edge and should be down When the coax cables are within two inches of the front frame edge carefully connect the semi rigid coax cables to their respective front panel connectors using a 5 16 inch open end wrench For Option 020 and 021 instruments main deck reassembly 1s just the opposite of disassembly Be careful that you do not bend the coax cables Possible attenuation or interference of the RF signal may result Carefully slide the main deck assembly into the instrument chassis until the front panel 1s within the front frame and the mounting holes are aligned Attach the front panel with the six Torxhead screws 3 top 3 bottom Attach the main deck assembly to the side struts using the six screws three screws to a side Turn the instrument over With the three Al assembly mounting stand offs on the main deck MP13 adjacent to the assembler mount the Al assembly to the main deck assembly The three large holes in the Al assembly must align with the three mounting stand offs and the heat sink holes must align with the deck mounting holes Firmly seat the Al assembly on the mounting stand offs and lock the stand offs by turning the screw heads a 1 4 turn clockwise Fasten the transistor heat sink to the deck with two screws Connect W 12 to AlJl Mount transformer to the mounting bracket using the four long transformer screws Mount
20. port 3 Repeat step 6 for W3 RF Input at S2 port 2 Unscrew the two Torxhead screws that secure the MP18 mixer mounting bracket to the 14 module base NOTE Remember the order in which the stiffener bar and mixer bracket are assembled The stiffener bar and mixer bracket assembly order is different between each brand of mixer used Disconnect U3 Mixer from AT1 Attenuator U3 Mixer and bracket can then be disassembled Disconnect ATI from 52 31 Microwave Converter Mode 11793 12 Remove 52 from MP14 module base by removing the two corner screws 13 Unsolder the three control wires 1 2 5 from 52 14 Remove the Spira Shield RF EMI gasket situated in the module base lip only if damaged or replacement of MP14 module base 40 RF Module Disassembly Procedure for Option 001 011 amp 021 Instruments NOTE When referring to switch ports port 1 is the far left SMA connector port 2 is the second SMA connector etc when holding the switch label up with the SMA connectors facing you 1 Disconnect W12 gray ribbon cable at 1 2 Remove MP16 module cover by removing the 10 cover screws 3 Disconnect cables W7 and W8 using 5 16 open end wrench W7 from U3 mixer and FLI Filter W8 from U2 IF Amp and 52 Switch port 4 4 Unsolder the orange and white orange wires 3 93 from U2 Unsolder the gray and white orange wires 8 93 from U1 S Remove U2 and FL1 from MP16 by removing the two scr
21. 03 5061 9447 5060 9847 5040 7201 11793 00001 0380 1705 0515 0381 2190 0586 11793 20005 0515 0381 2190 0586 8160 0472 11793 00002 0515 0381 2190 0586 11793 00014 0515 0680 11793 00007 0515 0373 0520 0130 2190 0045 2190 0584 3050 0098 3050 0891 3050 0893 11793 00017 11793 00005 0515 0381 2190 0586 6960 0623 6960 0009 11783 20007 11793 60002 0515 0446 11793 60002 0515 0446 8100 4014 0515 1137 2190 0584 3050 0891 7120 4559 O JJ w C9 Cp O 93 N Dn O IO G gt f 69 O 00 4 ANJOUN gte un k PF Table 7 Replaceable Parts Description REAR FRAME SCREW MACH M3 X 0 5 6MM LG PAN HD THREADED INSERT NUT M3X0 5 059 IN LG TOP TRIM STRIP SIDE TRIM 3 1 2 COVER TOP COVER SIDE REAR PANEL ASSEMBLY TOP COVER SIDE COVER REAR PANEL FRONT DRESS PANEL EXCEPT OPTIONS 010 AND 011 FRONT DRESS PANEL OPTIONS 010 AND 011 ONLY FRONT SUB PANEL COVER BOTTOM BOTTOM COVER FOOT FULL 1 2 OD MAIN DECK STANDOFF 1 4 TURN 6 35 MM LG 10 16 MM SCREW MACH M4 X 0 7 10MM LG PAN HD URSHER LK HLCL 4 0 MM 4 1 MM ID MIXER HOUSING HD SCREW MACH M4 X 0 7 10MM LG PRN HD URSHER LK HLCL 4 0 MM 4 1 MM ID RFI STRIP ORDER QTY 2 FT RF COVER SCREW MACH M4 X 0 7 i0MM LG PRN HO URSHER LK HLCL 4 0 MM 4 1 MM IO AMPLIFIER BRACKET OPTIONS 001 011 AND 020 ONLY SCREW MACH M3 X 0 5 6MM LG PRN HO MIXER BRRCKET SCREW MACH
22. 051 gives an indication that the supply is nominally operational 24 Model 11793 Microwave Converter 34 Troubleshooting Primary power is present within instrument when line voltage power cord is connected to the instrument Maintenance described herein is performed with power supplied to the instrument and with protective covers removed Such maintenance should be performed only by service trained personnel who are aware of the hazards involved CAUTION Use the correct torque wrench when installing sub miniature connectors Do not exceed the following torque settings for this instrument 1 5 Nm for the 3 mm T 10 screws 2 0 Nm for the 4 mm T15 screws 0 7 6 3 inb for SMA connectors 0 7 6 3 inb for Type N connectors General Troubleshooting information is broken down into three categories RF devices control devices and power supplies Either a compatible measuring instrument or a power supply connected to the FREQ OFFSET INPUT can be used to control the RF switches If a power supply is used set it to 0 3 or 5 Vdc as dictated by Table 9 25 Microwave Converter Model 11793 RF Devices Service Sheets 1 and 2 Because of the diversity of test equipment and techniques available for troubleshooting the high frequency devices no specific procedures are given Check the performance parameters of the RF devices against the following table Table 10 Also check connectors
23. 6 IN 439 IN ID NUT HEX DBL CHRM 7 16 28 THO 094 IN THK CONNECTOR ASSEMBLY RF INPUT STANDARD AND OPTION 010 ONLY WASHER LK INTL T 3 8 IN 377 IN ID NUT HEX DBL CHRM 3 8 32 THD 094 IN THK CONNECTOR ASSEMBLY LO INPUT RIGHT SIDE OPTION 010 ONLY WASHER LK INTL T 3 8 IN 377 IN ID NUT HEX DBL CHRM 3 8 32 THD 084 IN THK CONNECTOR ASSEMBLY RF INPUT REAR PANEL OPTION 020 ONLY URSHER LK INTL T 3 8 IN 377 IN ID NUT HEX DBL CHRM 3 8 32 THO 094 IN THK CONNECTOR ASSEMBLY LO INPUT REAR PANEL OPTION 020 ONLY WASHER LK INTL T 3 8 IN 377 IN ID NUT HEX DBL CHRM 3 8 32 THD 094 IN THK CONNECTOR RSSEMBLY TYPE N IF OUTPUT RERR PANEL OPTION 020 RND 021 ONLY CONNECTOR RF RPC N FEM UNMTD 50 OHM 08555 20083 08555 20084 2180 0104 2950 0132 08673 60040 2190 0016 2950 0043 08673 60040 2190 0016 2950 0043 08673 60040 2190 0016 2950 0043 08673 60040 2190 0016 2950 0043 11793 60008 1250 0914 MIMO MMMM WO MT WRAP FPR 1250 0915 CONN SER APC N FEMALE 131 149 5040 0306 INSULATOR 5040 0306 08671 2027 INSULATOR 08671 2027 08555 20093 08555 20094 2190 0104 ORDER BY DESCRIPTION 1250 0870 CONTACT JACK BODY BULKHEAD WASHER LK INTL T 7 16 IN 439 IN ID NUT HEX DBL CHRM 7 18 28 THO 094 IN THK CONNECTOR RF BNC FEM SGL HOLE RR 50 OH
24. F OUTPUT connector or to the Down Convert Path The Down Convert Path has a 3 dB RF Attenuator to improve input SWR a Mixer the down converter an IF Low pass Filter to remove the sum component of the mixing process while passing the difference component and a 15 dB IF Amplifier to restore signal loss through the Down Convert Path Usually the LO frequency selected is higher than the frequency of the input signal The measuring instrument assumes this The difference frequency the IF is filtered by the IF Low Pass Filter which has a 3 dB corner of 800 MHz The IF should be kept between the range of 10 and 700 MHz If the instrument has the optional LO Amplifier installed the measuring instrument automatically switches in the amplifier whenever an LO frequency greater than 18 GHz 15 selected 29 Microwave Converter Model 11793 Service Sheets 1 and 2 Input Signal Down Converter A single input on the rear panel the FREQ OFFSET INPUT has three logic states which control both the switching of the RF two paths and the insertion of the optional LO Amplifier The Level Comparator senses the three states and drives the appropriate switches Service Sheets 1 and 2 are the schematic diagrams of the RF circuitry of the Microwave Converter Service Sheet 1 SS1 documents the standard Microwave Converter without the LO Amplifier option and Service Sheet 2 SS2 documents the Microwave Converter with the LO Amplifier The
25. F TC 0 100 24546 C4 1 8 T0 2371 F 0698 3150 6 RESISTOR 2 37K 1X 125W 0 100 24546 C4 1 8 T0 2371 F 0698 3150 6 RESISTOR 2 37K 1X 125U F TC 0 100 24546 C4 1 8 T0 2371 F 0698 3150 RESISTOR 2 37K 1 125U F TC 0 100 24546 4 1 8 70 20371 1826 0191 3 1 IC COMPARATOR GP DUAL 70 100 PKG 27014 LM319H 1820 1417 6 1 GATE TTL LS NAND QUAD 2 INP 01295 SN74LS26N 1820 1197 8 1 GATE TTL LS QUAD 2 INP 01295 SN74LSO00N 1902 3323 1 1 DIODE ZNR 42 2V 5 00 35 PD 4U TC 08 28480 1902 3323 1902 0960 6 1 DIODE ZNR 12V 5 00 35 PD 4W TC 077 28480 1402 0960 1825 0423 4 1 V RGLTR 70 3 27014 LM317K 0340 0875 9 1 INSULRTOR XSTR THRM CNOCT 28480 0340 0875 0515 0555 4 4 SCREW MACH M3 X 0 5 8MM LG PAN HD 00000 ORDER BY DESCRIPTION 0535 0004 9 2 NUT HEX DBL CHAM M3 X 0 5 2 4MM THK 00000 ORDER BY DESCRIPTION 2130 0584 9 2 URSHER LK HLCL 3 0 MM 3 1 MM ID 28480 2190 0584 11793 00015 4 i HERT SINK 28480 11793 00015 1826 0367 5 1 78 05 V RGLTR 70 339 04713 78 05 See introduction to this section for ordering information Indicates factory selected value 15 Replaceable Parts Model 11793A Table 7 Replaceable Parts Mfr HP Part C Qty Description Code Number D Reference Designation Mfr Part Number 11793 60003 3 DB ATTENUATOR 11793 60003 2110 0063 FUSE 75A 250V NTD 1 25X 25 UL 2110 0083 2110 0565 FUSEHOLOER E
26. LY LO INPUT CABLE SEMI RIGIO 26 TO U3 OPTION 020 ONLY LO INPUT CABLE SEMI RIGID 26 TO Si OPTION 021 ONLY LO INPUT CRBLE SEMI RIGID J4 TO U3 RIGHT SIDE 010 ONLY LO INPUT CABLE FLEX 35MM MALE ACCESSORY IF OUTPUT CABLE FLEX 5M MALE ACCESSORY CABLE ASSY COAX 50 OHM 12 IN LG JGK ACCESSORY Model 11793A Mfr Part Number 0955 0218 ORDER BY DESCRIPTION 0955 0237 ORDER BY DESCRIPTION 2190 0045 ORDER BY DESCRIPTION 0955 0217 0515 0680 2190 0584 3050 0891 11793 20002 11793 20003 11793 20004 11793 20101 11793 20103 11793 20102 11793 60013 11793 60013 11793 20104 11793 60011 0515 1084 ORDER BY DESCRIPTION 2190 0584 11793 60012 11793 60007 ORDER BY DESCRIPTION 2190 0584 11793 60010 232 2 CS 105 3 1250 0960 N126 1400 0025 2190 0102 ORDER BY DESCRIPTION 11793 20106 11793 20107 11793 20108 11793 20109 11793 20110 11793 20111 11793 60009 11793 60006 8120 1838 Indicates factory selected value Model 11793A Microwave Converter Table 8 Code List of Manufacturers Manufacturer Name ANY SATISFACTORY SUPPLIER TEXAS INSTR INC SEMICDND CMPNT DIV MOTOROLA SEMICONDUCTOR PRODUCTS PANDUIT CORP CORNING GLASS WKS COMPONENT DIV CORNING GLASS WORKS BRADFORD SPECIALTY CONNECTOR CO INC NATIONAL SEMICONDUCTOR CORP HEWLETT PACKARD CO CORPORATE HQ RCA CORP SOLID STATE DIV SPRAGUE ELECTRIC CO AMPHENOL SALES DIV OF BUNKER RAMO
27. M FREQUENCY OFFSET INPUT PART OF W12 NOT SEPARATELY REPLACEABLE PART OF U10 Uii SEPARATELY REPLACEABLE 08555 20093 08555 20094 2190 0104 2950 0132 1250 0870 O m Un cn O 00 uo 63 uo w C O C cp C O 09 4 62 to tO n3 WOH o 8 9 10 25204 AND ABOVE MPI 021 5801 FRAME FRONT 5021 5801 0515 1227 SCREW MACH M3 X 0 5 BMM LG 90 DEG FLH HD ORDER BY DESCRIPTION MP2 021 5832 SIDE STRUT 5021 5832 0515 1331 SCREW MACH M4 X 0 7 6MM LG FLRTHD OROER BY DESCRIPTION 2407A ONLY 1 5020 8801 FRONT FRAME 5020 8801 0515 1227 SCREU MRCH M3 X 0 5 6MM LG 90 DEG FLH HO 0515 1227 MP2 5020 8832 SIDE STRUT 5020 8832 2510 0192 SCREW MACH 8 32 25 IN LG 100 DEG ORDER BY DESCRIPTION See introduction to this section for ordering information Indicates factory selected value 16 Model 11793A Reference Designation 2407A ONLY MP3 MP4 MP5 25204 AND ABOVE 6 MP MP8 24074 ONLY MP6 MP8 MPG MP10 2520 AND ABOVE MP11 2407A ONLY MP12 MP13 See introduction to this section for ordering information HP Part Number 5020 8802 0515 0680 0590 1203 5040 7202 5001 0438 5061 9435 5051 9452 11793 20008 5060 9835 5060 9852 11793 00004 11793 00005 11793 00012 11793 000
28. M3 X 0 5 10MM LG PAN HD SCREW MACH 2 58 375 IN LG PRN HD POZI URSHER LK HLCL NO 2 088 IN ID URSHER LK HLCL 3 0 MM 3 1 MM ID URSHER FL MTLC NO 2 094 IN ID URSHER FL MTLC 3 0 3 3 MM IO URSHER FL MTLC 4 0 MM 4 4 MM IO STIFFENER BRR TRANSFORMER BRACKET SCREW MACH M4 X 0 7 10MM LG PAN HD WASHER LK HLCL 4 0 MM 4 1 MM ID PLUG HOLE DOME HD FOR 312 D HOLE STL PLUG HOLE FL HD FOR 438 D HOLE BRS NOT ASSIGNED NOT ASSIGNED GROMMET SEMI RIGID CABLE SWITCH OPTIONS 001 011 AND 021 NL SCREW MACH 3 X 0 5 22MM LG PRN HD COAXIAL SWITCH EXCEPT OPTIONS 001 011 021 SCREW MACH 3 X 0 5 22MM LG PAN HD TRANSFORMER PUR 115 230V SCREW MACH M3 X 0 5 50MM LG PAN HD WASHER LK HLCL 3 0 MM 3 1 MM ID URSHER FL MTLC 3 0 MM 3 3 MM ID LABEL WARNING 5 1 IN LG MYLAR Replaceable Parts Mfr Part Number 5020 8802 0515 0680 0590 1203 5040 7202 5001 0438 5061 9435 5061 9452 11793 20009 5060 9835 5060 9852 11783 00004 11793 00005 11793 00012 11793 00003 5061 9447 5060 9847 5040 7201 11793 00001 0380 1705 ORDER DESCRIPTION 2190 0586 11793 20005 ORDER BY DESCRIPTION 2190 0586 8160 0472 11733 00002 ORDER BY DESCRIPTION 2190 0586 11793 00014 0515 0680 11793 00007 ORDER BY DESCRIPTION ORDER BY DESCRIPTION 2190 0045 2190 0584 3050 0098 3050 0891 3050 0893 11793 00017 11793 00006 ORDER BY DESCRIPTION 2180 0586 6960 0023 8960 0009 11793 20007 11793 60002
29. MSTELVEEN The Netherlands Tel 20 437771 SOUTH EAST EUROPE Hewlett Packard S A 7 Rue du Bois du Lan CH 1217 MEYRIN 2 Switzerland Tel 022 83 12 12 Telex 27835 hpse Cable HEWPACKSA Geneve OTHER EUROPE Hewlett Packard S A P O Box 150 Rte du Nant D Avril CH 1217 MEYRIN 2 Switzerland Tel 022 83 8111 Telex 22486 hpsa Cable HEWPACKSA Geneve EASTERN USA Hewlett Packard Co 4 Choke Cherry Road ROCKVILLE MD 20850 Tel 301 258 2000 MIDWESTERN USA Hewiett Packard Co 5201 Tollview Drive ROLLING MEADOWS IL 60008 Tel 312 255 9800 SOUTHERN USA Hewlett Packard Co 2000 South Park Place P O Box 105005 ATLANTA GA 30348 Tel 404 955 1500 WESTERN USA Hewlett Packard Co 3939 Lankershim Blvd P O Box 3919 LOS ANGELES CA 91604 Tel 213 506 3700 OTHER INTERNATIONAL AREAS Hewlett Packard Co Intercontinental Headquarters 3495 Deer Creek Road PALO ALTO CA 94304 Tel 415 857 1501 Telex 034 8300 Cable HEWPACK
30. RD CONNECTION FUSE HOLDER AND 75A FUSE 11 Microwave Converter Model 11793A 24 Performance Tests Description Performance testing consists of a general functional check to verify the instrument down converts and switches RF paths properly Since the Microwave Converter is designed to operate with specific HP instrumentation no substitution is recommended Equipment Measuring Instrument HP 8901B or HP 8902A Sensor Module HP 11792A Microwave LO Source See Table 4 Microwave Signal Source HP 8673B up to 26 GHz w Amplifier HP 8673 Option 008 up to 26 GHz w o Amplifier HP 8672A Option 008 up to 18 GHz w o Amplifier Signal Source HP 8642B HP 8660C 86602B HP 8662 HP 8663A Procedure 12 l Connect the equipment as shown in Figure 3 Set the two microwave sources to CW Set the microwave signal source to 0 dBm NOTE Check that the measuring instruments RF Power calibration factors match the sensor module The measuring instrument must be in frequency offset mode in order to enter the RF Power calibration factors into the Frequency Offset mode RF Power Cal Factor Table 2 Set the microwave LO source frequency and level as listed in Table 6 Performance Tests Instrument Settings For each setting perform the following steps a Set the frequency of the microwave signal source as listed b On the measur
31. RIVER 12V REGULATOR 5V REGULATOR VR4 VIN TO RF SWITCHES A 2 3 SIGNAL DIRECT PATH Wie LO OUT PATH w SIGNAL DOWN CONVERT PATH LO AMPLIFIER IN PATH GNO 26V TO SWITCHES s wr aras 12V AMPLIFIERS 253 Figure 14 1 SWITCH CONTROL ASSEMBLY Schematic Diagram 43 44 REGIONAL SALES AND SERVICE OFFICES NORTH CENTRAL AFRICA Hewlett Packard S A 7 Rue du Bois du Lan CH 1217 MEYRIN 2 Switzerland Tel 022 83 12 12 Telex 27835 hpse Cable HEWPACKSA Geneve ASIA Hewlett Packard Asia Ltd 6th Floor Sun Hung Kai Centre 30 Harbour Rd G P O Box 795 HONG KONG Tel 5 832 3211 After Jan 1 1984 47th Floor China Resources Bidg 26 Harbour Rd Wanchai HONG KONG Telex 66678 HEWPA HX Cable HEWPACK HONG KONG CANADA Hewlett Packard Canada Ltd 6877 Goreway Drive MISSISSAUGA Ontario L4V 1M8 Tel 416 678 9430 Telex 610 492 4246 MEDITERRANEAN AND MIDDLE EAST Hewlett Packard S A Mediterranean and Middle East Operations Atrina Centre 32 Kifissias Ave Paradissos Amarousion ATHENS Greece Tel 682 88 11 Telex 21 6588 HPAT GR Cable HEWPACKSA Athens EASTERN EUROPE Hewlett Packard Ges m b h Lieblgasse 1 P O Box 72 A 1222 VIENNA Austria Tel 222 2365110 Telex 1 3 4425 Hewlett Packard S A Uilenstede 475 P O Box 999 NL 1180 AZ A
32. Replace the top cover by placing the cover onto the upper frame of instrument then slide cover toward front of instrument Tighten screw in middle of rear edge of cover while applying a slight upward pressure on the leading edge to keep the edge from jamming on front frame Guide cover into slot in the top of the front frame Turn instrument over and repeat for the bottom cover 39 RF Module Disassembly Procedure for Std Option 010 amp 020 Instruments 10 Ln NOTE When referring to switch ports port 1 is the far left SMA connector port 2 is the second SMA connector etc when holding the switch label up with the SMA connectors facing you Disconnect W 12 gray ribbon cable at 111 Remove module cover MP16 by removing the ten cover screws Disconnect cables W7 and W8 using 5 16 open end wrench W7 from U3 Mixer and FL 1 Filter W8 from U2 IF Amp and S2 Switch port 4 Unsolder orange wire from U2 Remove U2 and FL1 from MP16 by removing the two screws securing U2 then loosening the filter clamp screw and sliding the assembly out Disconnect the LO input semi rigid coax cable W1 in Standard instruments W19 Option 010 instruments or W17 in Option 020 instruments at U3 being careful not to bend crimp or kink the cable The radio frequency interference RFI shielding grommet can be removed by slipping the grommet off of the cable via the cable access slit Repeat step 6 for W2 Output at 52
33. STD AND OPTION 040 ONLY NOTE 3 95 W15 RF INPUT 19 46 OPTION 020 ONL Y LEFT SIDE 43 Wi co INPUT STD ONLY i I NOTE 3 RIGHT SIDE 44 wig Lo input gt lt OPTION 010 ONLY ue 17 S2 RF 1 348 INPUT SIGNAL DOWN CONVERTER INPUT SWITCH MIXER ATTENUATOR RF jp s que gt bed LD 800 MHz FL1 LOW PASS FILTER U2 IF 15dB AMPLIFIER D W2 2 IF tr STD AND OPTION NOTE 3 W16 040 ONLY J7 gu gt l output OPTION 020 ONLY Figure 11 INPUT SIGNAL DOWN CONVERTER Sche matic Diagram for Standard Option 010 and Option 020 39 40 FROM 1 SWITCH CONTROL NOTES ALL CIRCUITRY EXCEPT W12 15 ENCASED IN A R F I SHIELDING MODULE J9 AND J10 ARE PART OF W12 AND W11 RESPECTIVELY AND CANNOT BE ORDERED SEPARATELY INPUT VOLTAGE TO LO AMPLIFIER CANNOT EXCEED 5 6 6V OF 12 Vdc SUPPLY OPTION PLACEMENT DF CONNECTORS FRONT PANEL REAR PANEL LO INPUT PLACEMENT LEFT RIGHT OF ALL SIDE SIDE CONNECTIONS LO STD OPT OPT OUT 910 020 LO OPT OPT OPT IN 004 011 021 SEE FIGURE B FOR HELP IN COMPONENT LOCATION AND IDENTIFICATION INPUT SIGNAL DOWN CONVERTER Wii 26 SWITCHES l SIGNAL DIRECT PATH SIGNAL DOWN CONVERT PATH 12 TO AMPLIFIERS T
34. XTR POST 12A 250 V 2110 0565 2110 0565 FUSEHOLDER 198 MAX FOR UL 2110 0555 2110 0569 FUSEHOLDER COMPONENT NUT THRERD M12 7 2110 0558 2190 0068 WASHER LK INTL T 1 2 IN 505 IN ID 2190 0068 9135 0229 1400 0025 FILTER LOW PASS DC TO 800 2 M F SMA CLRMP CRBLE 5 DIR 5 UD NYL 9135 0229 1400 0025 0515 0381 SCREW MACH M4 X 0 7 10MM LG PRN HD ORDER BY DESCRIPTION 0535 0006 NUT HEX 1 M4 X 0 7 3 2MM THK ORDER 8Y DESCRIPTION 2190 0585 URSHER LK HLCL 4 0 MM 4 1 MM ID 2190 0585 3050 0885 WASHER FL MTLC 4 0 MM 4 4 MM ID 3050 0893 08673 60040 2190 0016 ORDER BY DESCRIPTION 11793 60008 CONNECTOR ASSEMBLY LO INPUT LEFT SIDE STANDARD ONLY WASHER LK INTL T 3 8 IN 377 IN ID NUT HEX OBL CHAM 3 8 32 THD 094 IN THK CONNECTOR ASSEMBLY TYPE N IF OUTPUT STANDARD AND OPTION 010 ONLY 08673 60040 2190 0016 2950 0043 11793 60008 1250 0914 CONNECTOR RF APC N FEM UNMTD 50 OHM 1250 0914 1950 0915 CONTRCT RF CONN SER RPC N FEMALE 131 148 5040 0306 INSULRTOR 5040 0306 08671 2027 INSULATOR 08671 2027 08555 20093 08555 20094 2190 0104 ORDER BY DESCRIPTION 08673 60040 2190 0016 ORDER BY DESCRIPTION 08673 60040 2190 0016 OROER BY DESCRIPTION 08673 60040 2190 0016 ORDER BY DESCRIPTION 08673 60040 2190 0016 ORDER BY DESCRIPTION 11793 60008 1250 0914 CONTACT JACK BODY BULKHEAD WASHER LK INTL T 7 1
35. ainer double wall carton made of 2 4 MPa 350 psi test material 1s adequate Model 11793A Microwave Converter c Use enough shock absorbing material a 7 5 to 10 0 cm 3 to 4 in layer around all sides of the instrument to provide a firm cushion and to prevent movement the container Protect the front panel with cardboard d Sealthe shipping container securely Mark the shipping container FRAGILE to ensure careful handling 19 Operation Before the Microwave Converter is plugged in all protective earth terminals extension cords auto transformers and devices connected to it should be connected to a protective earth grounding socket Any interruption of the protective earth grounding will cause a potential shock hazard that could result in personal injury Before the Microwave Converter is plugged in it must be set to the same line voltage as the power source or damage to the instrument may result The HP 11793A Microwave Converter is designed to be operated remotely by the measuring instrument in its frequency offset mode Operation of the Microwave Converter is therefore under control of the measuring instrument 20 Operating Instructions To operate the Microwave Converter plug in the power cord and connect the signal and control cables as indicated in Figure 3 Microwave Converter Interconnections and Test Set up Refer to Table 1 LO Requirements for LO power requirements This instrument does not have
36. ainst the spring Turn counterclockwise while pushing with a slight pressure until the fuseholder is released Remove and replace the fuse with a new fuse of identical value 10 Model 11793A LO INPUT The LO input 3 5 mm connector couples an external oscillator signal source to the instrument RF INPUT is a rear panel input for the RF signal instead of the standard front panel connection for option 020 021 instruments ARNING e s CAUTIONS he At Yan t ARS ymo gt ET 3 2 LO INPUT is input for the LO signal instead of the standard front panel connection for the option 020 021 instruments Figure 4 Front Panel Features IF OUTPUT is a rear panel out put for the IF signal instead of the standard front panel connec tion for the option 020 021 instruments Figure 5 Rear Panel Features Microwave Converter IF OUTPUT The IF output Type N connector couples the IF output signal into measuring in strument RF input RF INPUT The RF input 3 5mm connector couples the microwave input signal into the instrument The maximum allowable input power is 30 dBm 1watt the input impedance is 50 ohms nominal FREQ OFFSET INPUT enables the measuring instrument to con trol the switching circuitry LINE VOLTAGE SELECTION SWITCH 115 or 230 Vac LINE VOLTAGE POWER CO
37. and other option models as shown in Figures 7 and 8 In Option 020 and 021 models the RF module is in the rear of the instrument and the transformer is mounted in the front left corner The following procedures allow the removal of the Microwave Converter components from within the instrument chassis 1 Remove the top and bottom covers by loosening the screw in the middle of each cover rear edge These are captive screws and will cause the cover to push away from the front frame Slide each cover toward rear of the instrument to disengage then lift up and away from the instrument 2 Remove the side covers the same manner as that of the top and bottom covers 3 Remove the plastic trim from the top of the front frame by inserting a screwdriver into the rear slots and gently prying up the strip 4 Disconnect 18 on the rear panel by removing the 9 16 inch retaining nut and lock washer 5 Instruments with serial number prefix 2520A have MP8 back panel riveted to MP3 rear frame To remove the rear frame unscrew the four corner screws that connect MP2 side struts to Pull off the two wires 05 and 0 black green and black on the LINE VOLTAGE switch both wires are of the quick disconnect type For instruments with serial number prefix 2407A remove MP8 back panel from MP3 rear frame by unscrewing eight screws Pull off the two wires 05 and 0 black green and black on the LINE VOLTAGE switch both wires are of the q
38. de of the module base Connect to port 1 of 52 Connect U3 to the mixer bracket ensuring that the mixer side port which connects to the IF output faces opposite to the bracket mounting holes Connect to AT but do not tighten NOTE Mixer construction varies with manufacturer and thus is assembled within the RF Module differently For example a Norsal mixer has a stiffener bar placed between the mixer mounting bracket and the base mounting castings An RHG mixer has a stiffener bar placed above the mixer mounting bracket 33 Microwave Converter Model 11793A 10 11 1 2 13 1 4 15 16 17 1 8 19 Attach the mixer assembly to the module base but not tighten the screws Tighten the connection to AT1 then tighten the Mixer assembly screws Connect W1 in Standard instruments W19 Option 010 instruments or W17 in Option 020 instruments to the right port of the mixer cable slots in module should be facing assembler Ensure that the radio frequency interference RFI shielding grommet cradles the cable in the slot with the cable access slit facing to the side Connect W2 to 52 port 3 Ensure that the RFI Grommet 1s In place as above in step 9 Repeat step 10 for W3 to S2 port 2 Attach U2 to the module cover the orange wire to the U2 amplifier terminal Place filter clamp around FL1 and attach loosely to the cover Connect FL1 to U2 Tighten FL1 clamp
39. e Sheet 3 Check the points indicated in the schematic diagram for dc level and ac ripple Note that the 5V Regulator 1s dependent on the 12V Regulator 26 Model 11793A Microwave Converter Equipment Refer to Table 4 Recommended Test Equipment 35 Repair Cleanliness Do not handle the A1 Switch Control Assembly board more than necessary If dirt or moisture from the hands comes in contact with the circuit side of the Al board the circuits may become inoperative Do not use solder flux remover on the circuit board 36 Cleaning the Control Line Switch Contacts These instructions pertain to switches 51 in instruments with the LO amplifier option and or 52 standard and LO amplifier option configuration located within the RF module See Figure 9 Switch Contact Location TERMINAL 1 SPRING CONTACT TERMINAL SPRING CONTACT TERMINAL 2 Ml SPRING CONTACT CONTACT SWITCH CONTACT Figure 9 Switch Contact Location 1 Remove the switch from the RF module Refer to Paragraphs 39 or 40 RF Module disassembly procedures Remove the two screws on the switch cover and remove the cover 3 Saturate the edge of a sheet of durable paper with alcohol 27 Microwave Converter Model 11793A 4 Insert the paper under one of the contacts and while pressing gently on the contact slide the paper through Do not allow the alcohol to run inside the switch assembly Do not allow the paper to shred Do this s
40. e numbers 27 Replaceable Parts List Table 7 Replaceable Parts is organized as follows a Electrical assemblies and their components in alphanumeric order by reference designation b Chassis mounted parts and mechanical parts in alphanumeric order by reference designation The following information is provided for each part a The Hewlett Packard part number b Part number check digit CD c The total quantity Qty is provided on the first entry of the part number d The description of the part e Atypical manufacturer of the part in a five digit code f The manufacturer s number for the part 13 Microwave Converter Model 11793A 28 Parts List Updating Manual Changes Supplement Production changes to the instrument made after the publication date of this manual are denoted by a change in the serial number prefix Changes to the parts list are recorded by serial prefix on a Manual Changes supplement Also errors in the manual are noted the Errata portion of the Manual Changes supplement 29 Illustrated Parts Breakdowns The components that compose the Microwave Converter are illustrated in the component locator diagrams in Figure 13 and in the illustrated parts breakdown photographs of Figures 7 and 8 14 Model 11793A Replaceable Parts Table 7 Replaceable Parts Reference HP Part e RE Mfr Designati
41. ed with the Microwave Converter are shown in Figure 1 8 The line power cable may be supplied in several plug configurations depending on the destination of the original shipment Refer to the Paragraph 12 Power Cables in this manual Fuses with a 0 75A rating for both 115 and 230 Vac HP part number 2110 0063 are supplied The control cable HP part number 8120 1838 is a 30 cm 12 in flexible cable with male BNC 50 ohm connectors on each end It connects to the frequency offset mode output of the measuring instrument The LO cable HP part number 11793 60009 is a 36 cm 14 5 in flexible cable with 3 5 mm female end connectors The LO cable includes a 3 5 mm male to Type N male adapter The cable connects to the output of the LO source Options 001 011 and 021 delete tne adapter The IF cable HP part number 11793 60006 is a 25 cm 10 in flexible cable with Type N male 50 ohm end connectors The cable connects to the RF input of the measuring instrument Model 11793A Microwave Converter 7 Recommended Test Equipment Table 4 lists the test equipment recommended to check adjust and troubleshoot the Microwave Converter The Minimum Specifications column describes the essential requirements for each piece of test equipment If substitute equipment is used it must meet or exceed the minimum specifications Table 4 Recommended Test Equipment To Operate and Test the Microwave Converter Instrument Type Minimum Specificati
42. equential suffix which is unique to each instrument The contents of this manual apply directly to instruments having the serial prefix listed under Serial Numbers on the title page An instrument manufactured after the printing of this manual may have a serial prefix that 15 not listed on the title page This unlisted serial prefix indicates that the manual for this instrument is supplied with a Manual Changes supplement that documents the differences In addition to change information the supplement may contain information for correcting errors in the manual To keep this manual as current and accurate as possible Hewlett Packard recommends that you periodically request the latest Manual Changes supplement The supplement 1s identified with the manual print date and part number that appear on the title page Complimentary copies of the supplement are available on request from your nearest Hewlett Packard office For information concerning a serial prefix not listed on the title page or in the Manual Changes supplement contact your nearest Hewlett Packard office 5 Description The HP Model 11793A Microwave Converter down converts microwave input signals in the range from 1 3 to 26 5 GHz For frequencies below 1 3 GHz signals are routed directly to the input of the measuring instrument Instruments suitable for lower frequency measuring are the HP 8901B Modulation Analyzer or the HP 8902A Measuring Receiver For input signals above 1 3 GHz
43. everal times and repeat for the other switch contact 5 Saturate the edge of another sheet of paper with a freon type degreaser and repeat step 4 6 Remove any shreds of paper that may have lodged in the contacts 7 Reinstall the switch cover Note the orientation of the feedthrough terminals on the cover with respect to the switch contacts 8 Replace the switch according to Paragraphs 41 or 42 RF Module assembly procedures 37 Instrument Disassembly Procedure The 11793A Microwave Converter uses metric connecting hardware in the form of 3 mm T10 and 4 mm T15 Torxhead screws except for two small English thread Pozidriv screws mounting U1 to MP17 Use the Torxhead size T10 and T15 bits that are provided to disassemble and re assemble the instrument The recommended torque wrench for use with the Torxhead bits may be ordered as HP part number 8730 0012 The major component blocks of the 11793A Microwave Converter are 14 RF Signal Processing Module Al A1 Switch Control Assembly and Power Transformer RF module and the Al assembly are mounted on MP13 the Main Deck The power transformer is mounted on MP2 the instrument chassis left side strut See Figures 6 7 and 8 to locate and identify parts and assemblies Note that Option 020 and 021 instruments differ from the standard and other option models in that the main deck and transformer locations inside the instrument are reversed when compared to the standard
44. ews securing U2 then loosen the filter clamp screw and slide the assembly out 6 Disconnect W9 from 51 port 1 and U1 7 Disconnect the LO input semi rigid coax cable W4 in Option 001 W14 in Option 011 or W18 in Option 021 from 51 port 2 being careful not to bend crimp or kink the cable The radio frequency interference RFI shielding grommet can be removed by slipping the grommet off of the cable via the cable access slit 8 Disconnect W6 from 51 port 3 and U3 9 Disconnect W 5 from S1 port 4 and U1 power terminal side 10 Unscrew the two Torxhead screws that secure the U1MP17 Amplifier mounting bracket to MP14 module base The U1 amplifier and bracket can then be removed 11 Unscrew the two Torxhead screws that secure the MP18 mixer mounting bracket to MP14 module base NOTE Remember the order in which the stiffener bar and mixer bracket are assembled The stiffener bar and mixer bracket assembly order is different between each brand of mixer used 12 Disconnect U3 from the Attenuator AT 1 U3 Mixer and bracket can then be disassembled 32 Model 11793A Microwave Converter 13 Disconnect W2 from S2 port 3 being careful not to bend crimp or kink the cable 14 Disconnect W3 from 52 port 2 being careful not to bend crimp or kink the cable 15 Disconnect AT1 from S2 port 16 Remove switches 51 and 52 from MP14 module base by removing the two screws that secure each switch 17 Unsolder the c
45. has a stiffener bar piaced above the mixer mounting bracket Attach the mixer assembly to the module base but do not tighten the screws Tighten the connection to AT1 then tighten the mixer assembly screws Assemble U1 HF LO Amplifier and the UIMP17 Mounting Bracket Ensure that the U1 power terminal labels are up and that the terminals face towards switch 52 Attach and secure Ul Amplifier assembly to MP14 module base Connect W3 to S2 port 2 cable slots in module should be facing assembler Insure that the radio frequency interference RFI shielding grommet cradles the cable in the slot with the cable access slit facing to the side Connect W2 to S2 port 3 Ensure that the RFI Grommet is in place as described step 11 Connect W 5 to the left port of Ul Amplifier and to 51 port 4 Connect W6 to the right port of U3 mixer and to S 1 port 3 Connect the LO input semi rigid coax cable W4 in Option 001 instruments W14 in Option 011 instruments or W18 in Option 021 instruments to S1 port 2 Insure that the RF grommet is in place as described in steps 11 Connect W9 to the right port of U1 and to S1 port 1 Attach U2 to MP16 module cover Solder both the orange and white orange wires 3 93 to the U2 amplifier terminal Place filter clamp around FL 1 and attach loosely to the cover Connect FL to U2 Tighten 1 clamp Connect W 7 to U3 and FL l Connect W 8 to U2 and S2 port 4 Secure module cover to base
46. ing instrument key in 27 3 SPCL Key in the frequency of the microwave LO source in MHz then press the MHz key c On the measuring instrument measure RF frequency and RF Power in that order The measuring instrument s display should read as indicated in table 6 The listed frequency is a nominal value 3 Set the RF signal source to 1270 MHz and level 10 dBm 4 On the measuring instrument key in 27 3 SPCL and enter 0 MHz This leaves the measuring instrument in frequency offset mode with 0 MHz offset Measure RF Frequency and RF Power in that order Model 11793A Microwave Converter Table 6 Performance Test Instrument Settings Measuring Instrument Display Frequency MHz Level P Frequency MHz Level dBm Frequency MHz LO Source Signal Source 25 9637 25 963 Use this level only if the LO amplifier is installed Option 001 011 or 021 Use this level only if the LO amplifier is not installed Option 001 011 or 021 Omit this step if maximum system frequency is 18 GHz 25 Adjustments The only adjustment necessary is setting the 12V power supply Connect a dc voltmeter to the case of VR3 See Service Sheet 3 Adjust AIR 5 on the Al Switch Control Assembly until the voltage is between 11 9 and 12 1 Vdc 26 Replaceable Parts Table 7 lists all replaceable parts in alphanumeric order by reference designator Table 8 contains the names and addresses that correspond to the manufacturer s cod
47. injury Do not proceed beyond a WARNING sign until the indicated conditions are fully under stood and met The CAUTION sign denotes a hazard It calls attention to an operating procedure practice or the like which if not correctly performed or adhered to could result in damage to or destruction of part or all of the product Do not proceed beyond a CAUTION sign until the indicated conditions are fully understood and met Interrupting the protective grounding conductor inside or outside the instrument or disconnecting the protective earth terminal will cause a potential shock hazard that could result in personal injury Grounding one conductor of a two conductor outlet is not sufficient protection Whenever it ts likely that the protection has been impaired the instrument must be made inopera tive and be secured against any unintended operation If this instrument is to be energized via an auto transformer for voltage reduction make sure the common terminal is connected to the earth termi nal of the power source Servicing instructions are for use by service trained personnel only To avoid dangerous electric shock do not perform any servicing unless qualified to do so Adjustments described in the manual are per formed with power supplied to the instrument while protective covers are removed Energy avail able at many points may if contacted result in per sonal injury Capacitors inside the instrument ma
48. l of parts is likely to expose dangerous voltages Disconnect the product from all voltage sources while it is being opened The power cord is connected to internal capacitors that my remain live for 5 seconds after disconnecting the plug from its power supply For Continued protection against fire hazard replace the line fuse s only with 250 V fuse s or the same current rating and type for example normal blow or time delay Do not use repaired fuses or short circuited fuseholders Always use the three prong ac power cord supplied with this product Failure to ensure adequate earth grounding by not using this cord may cause product damage This product is designed for use in Installation Category and Pollution Degree 2 per 1010 and 664 respectively FOR INDOOR USE ONLY This product has autoranging line voltage input be sure the supply voltage is within the specified range Chapter 1 Regulatory Information Updated March 1999 To prevent electrical shock disconnect instrument from mains line before cleaning Use dry cloth or one slightly dampened with water to clean the external case parts Do not attempt to clean internally Ventilation Requirements When installing the product in a cabinet the convection into and out of the product must not be restricted The ambient temperature outside the cabinet must be less than the maximum operating temperature of the product by 4 C for every 100 watts
49. not listed the replaceable parts table include the instrument model number instrument serial number description and function of the part and the quantity of parts required Address the order to the nearest Hewlett Packard office 31 Manual Changes These paragraphs contain manual change instructions for backdating this manual for HP Model 11793A Microwave Converters with the serial number prefix 24074A Instruments with Serial Prefix 2407 have System II cabinet parts and hardware that are English thread Instruments with Serial Prefix 2520A and higher have System II cabinet parts and hardware that are METRIC thread In Table 7 Replaceable Parts both English and Metric thread part numbers are listed for the System H cabinet parts These correct part numbers are referenced under the instrument s serial number prefix Instruments with the serial number prefix 2407 have MP3 rear frame MP8 rear panel and associated english thread hardware that are screwed together These parts have been changed to a riveted one piece assembly that is referenced to MP8 To replace MP8 you must order the Rear Panel Assembly 11793 20009 and the metric screws for the side struts and rear feet 32 SERVICE 33 Principles of Operation Simplified Block Diagram A simplified block diagram of the Microwave Converter is shown in Figure 10 The signal at the RF INPUT connector is routed through an input switch either to the Direct Path and out the I
50. nt as options they may be ordered through the nearest Hewlett Packard office Refer to Paragraph 6 under Mechanical Options for kit information See Figure 2 Rack Mounting Options 17 Storage and Shipment The instrument should be stored in a clean dry environment The following environmental limitations apply to both storage and shipment Temperature Standard 55 C to 75 C Temperature Options 001 011 and 021 25 C to 75 C Hu midit ARI ce toan ie obi Ed 9 5 relative ATUS usu uyllur tpe di 15 300 meters 50 000 feet 18 Packaging Original Packaging Containers and materials identical to those used in factory packaging are available through Hewlett Packard offices If the instrument is being returned to Hewlett Packard for servicing attach a tag indicating the type of service required return address model number and full serial number Also mark the container FRAGILE to ensure careful handling In any correspondence refer to the instrument by model number and full serial number Other Packaging The following general instructions should be used for repackaging the instrument with commercially available materials a Wrap the instrument in heavy paper or plastic If shipping to a Hewlett Packard office or service center attach a tag indicating the type of service required return address model number and full serial number b Use a strong shipping cont
51. oduct Do not proceed beyond an CAUTION note until the indicated conditions are fully understood and met 2 Chapter 1 Regulatory Information Updated March 1999 Safety Considerations for this Instrument WARNING This product is a Safety Class I instrument provided with a protective earthing ground incorporated in the power cord The mains plug shall only be inserted in a socket outlet provided with a protective earth contact Any interruption of the protective conductor inside or outside of the product is likely to make the product dangerous Intentional interruption is prohibited Whenever it is likely that the protection has been impaired the instrument must be made inoperative and be secured against any unintended operation If this instrument is to be energized via an auto transformer for voltage reduction make sure the common terminal is connected to the earth terminal of the power source If this product is not used as specified the protection provided by the equipment could be impaired This product must be used in a normal condition in which all means for protection are intact only No operator serviceable parts in this product Refer servicing to qualified personnel To prevent electrical shock do not remove covers Servicing instructions are for use by qualified personnel only To avoid electrical shock do not perform any servicing unless you are qualified to do so The opening of covers or remova
52. on Number D Qty Description Code Mfr Part Number 11793 60001 4 SWITCH CONTROL ASSEMBLY 28480 11793 60001 0180 0197 8 2 20 10 20VOC TA 56289 1500225 9020 2 0180 2302 1 CAPACITOR FXD 200UF 75 10 50VDC AL 56289 39D207G050F36 0SB 1400 0249 0 CABLE TIE 062 625 DIR 091 UD NYL 06383 PLT1M 8 0180 1794 3 CAPACITOR FXD 22UF 10 35VDC 56289 1500226X3035R2 0160 5098 2 CAPACITOR FXD 22UF 10 50VDC CER 16299 CACO5X7R2247050A 0160 5098 6 CAPACITOR FXD 22UF 10 5 CER 16299 5 7 2247050 0160 5098 6 CAPACITOR FXD 22UF 10 50VDC CER 16299 CACOSX7R2247050A 0160 4832 4 CAPACITOR FXO 01UF 10 100VDC CER 28480 0160 4832 0160 5555 0 CAPACITOR FXO 33UF 5 100VDC 28480 0160 5555 1901 0028 5 DIODE PUR RECT 400v 750 00 29 28480 1901 0028 1901 0028 5 DIODE PuR RECT 400v 7500 DO 29 28480 1901 0028 1901 9050 3 DIODE SUITCHING 80V 200MA 2NS 00 35 28480 1901 0050 1901 0050 3 DIODE SWITCHING 80 200 2NS 00 35 28480 1901 0050 1901 0050 3 DIODE SuITCHING 80V 2008 2NS 00 35 28480 1401 0050 1901 0050 3 DIODE SUITCHING 80V 200MA 2NS 00 35 28480 1901 0050 1901 0050 3 DIODE SWITCHING 80V 200MA 2NS 00 35 28480 1901 0050 1901 0050 3 DIODE SUITCHING 80V 200MA 2 5 00 35 28480 1901 0050 1901 0050 3 DIODE SWITCHING 80V 200MA 2NS 00 35 28480 1901 0050 1990 0717 6 LED LAMP LUM INT 800UCD IF 30MA MAX 28480 HLMP 1501 1251 5717 0 CONNECTOR 10 PIN M POST TYPE 28480 1251 5717 1884 0273 4 THYRISTOR SCR 2N4101 TO 66 31585
53. on Suggested Model Contains specific circuitry to contro the HP 11793A HP 8901B or HP 8902A Sensor Module Must have a frequency range of 26 5 GHz and be compatible HP 11792A with the measuring instrument Microwave LO Source See LO Amplitude Range in Table 1 LO Requirements Note HP 8673B that the required output power depends on the LO amplifier option in the HP 11793A Microwave Signal Frequency Range 2 to 26 5 GHz HP 8673B Source Output Level 1 to 1 dBm No substitution recommended the LO amplifier option is not in the HP 11793A use the 8673B Option 008 To Troubleshoot the Microwave Converter Instrument Type Minimum Specification Multimeter DC Volts Range 100V DC Volts Accuracy 2 AC Volts Range 100V AC Volts Accuracy 10 at 50 Hz Power Supply Range 0 to 5V Output 10 mA RF Test Equipment Troubleshooting of the microwave components of the Microwave Converter requires measurements to 26 5 GHz of gain or insertion loss SWR power conversion loss and frequency Instruments which are required to perform these tasks include signal genera tors and sweepers network analyzers spectrum analyzers and power meters with ac companying couplers pads line stretchers etc Select the appropriate equipment and use standard test procedures to make these measurements 8 INSTALLATION 9 Initial inspection Inspect the shipping container for damage If the shipping container or cushioning material
54. ontrol wires on each switch 6 4 amp 92 on S1 5 1 amp 2 on S2 18 Remove the Spira Shield RF gasket situated in the module base lip only if damaged or necessary for MP14 module base replacement 41 RF Module Assembly Procedure for Std Option 010 amp 020 Instruments 1 Spira Shield RF gasket replacement Spira Shield is inserted into a groove in the module base MP14 Within the groove at spaced intervals are a series of rectangular protrusions called bosses Insertion and seaming should begin and finish at a boss a Use finger protection such as a rubber finger protector when working with the Spira Shield b Start at a boss on a straight section of the groove Push the shielding into the groove using a protected finger Guide and twist the shielding to the next boss with the other hand c At the next boss twist the shielding into a tight curl guide it through the groove then allow the shielding to expand to hold itself in place d When an opening in the outer wall of the module is encountered the shielding should be cut diagonally Begin the threading procedure on the other side of the opening e Twist the shielding tighter when rounding corners Solder the three control wires to the S2 terminals as follows green to 1 brown to 2 and red to C With the cable slots of the module facing towards the assembler mount S2 label up and the ports pointing to the center of the module in the left hand si
55. operation of the RF components is discussed in the principles of operation for the Simplified Block Diagram above Note that the RF switches S1 and 2 shown in the schematic automatically interrupt the current flowing into the energized solenoid once the plunger switches the RF contacts The plungers latch via permanent magnets Service Sheet 3 1 Switch Control Assembly The Level Comparator U1A and U1B and Decoder U3B U3C decode a three level input through the rear panel FREQ OFFSET INPUT connector into binary levels that control the RF switches see 551 and 552 The AND gates 172 are simply open collector inverters which drive the transistors Q2 Q3 Q4 05 to switch on and energize the solenoids of the RF switches Table 9 summarizes the decoding Table 9 Decoding of the Offset Frequency Input Level at FREQ OFFSET INPUT Direct Down Convert Down Convert The power supplies used are The unregulated 26V supplies drive current to the RF switch solenoids and is the input to the 12V Regulator The regulated 12V is the only adjustable supply It is the current input to the 5V Regulator as well as the reference from which both the Level Comparator references are derived and the RF Amplifiers are powered e The regulated 5V supplies current to most logic devices Either the 26 or 12V supply can trigger the Over Voltage Protection should the respective voltage exceed 42 or 12V LED
56. the bracket to the left side strut at the third and eighth holes counting forward from the rear frame with four screws Make sure that the transformer secondary wires 4 5 6 face the corner of the A1 Switch Control Assembly Replace rear frame assembly to the side struts by connecting with four screws at the frame corners On instruments with serial number prefix 2407A mount the rear panel to the rear frame using eight screws Ensure that the panel is aligned so that the electrical hardware is in the same corner as the transformer Connect the black green primary wire 05 on the transformer to the bottom right LINE VOLTAGE lug underneath the white brown gray wire 918 Connect the black primary wire 0 to the upper right LINE VOLTAGE luz Solder the colored secondary wires from the transformer to their respective solder pads on the A Assembly yellow to 4 green to 5 and blue to 6 Solder the black wire to the GND pad Reconnect J8 on W13 to the rear panel in the FREQ OFFSET INPUT opening using the 9 16 inch lock washer and nut 11793A Microwave Converter 13 14 Replace the side panels by centering each panel in the track formed by the side strut edges Slide the panel from the rear forward until the captive screw on the rear edge of the panel is in contact with the rear frame The screw should be in position to be tightened into the frame The panel will move forward into place as the screw is tightened
57. the Microwave Converter routes the signal through an internal mixer which mixes the input signal with an external local oscillator The difference frequency that is the intermediate frequency or IF is filtered amplified and then appears at the IF OUTPUT connector The IF should be between 10 and 700 MHz The Microwave Converter requires a 8 dBm leveled output from the LO For LOs with insufficient power above 18 GHz an optional internal amplifier 18 GHz to 26 5 GHz is available The measuring instrument controls switching of the RF path and of the LO amplifier via a rear panel connection on the Microwave Converter Model 11793A Microwave Converter 6 Options and Accessories Electrical Options The options are summarized in Table 3 The following list describes each option Option 001 Adds an 18 to 26 5 GHz LO amplifier to the standard instrument Option 010 Moves the LO INPUT to the right side of the front panel Option 011 Moves the LO INPUT to the right side of the front panel and adds the 18 to 26 5 GHz LO amplifier Option 020 Moves all front panel connectors to the rear panel Option 021 Moves all front panel connectors to the rear panel and adds the 18 to 26 5 GHz LO amplifier Table 3 HP 11793A Option Guide Rear Panel Placement for Front Panel Placement 10 of LO Input Amplifier Left Side Right Side All Connectors Not Installed Option 010 Option 020 Installed Option 001 Option 011 Option 021
58. tory Information Updated March 1999 Regulatory Information Updated March 1999 Safety Considerations GENERAL This product and related documentation must be reviewed for familiarization with safety markings and instructions before operation This product has been designed and tested in accordance with Publication 1010 safety Requirements for Electronic Measuring Apparatus and has been supplied in a safe condition This instruction documentation contains information and warnings which must be followed by the user to ensure safe operation and to maintain the product in a safe condition SAFETY EARTH GROUND A uninterruptible safety earth ground must be provided from the main power source to the product input wiring terminals power cord or supplied power cord set SAFETY SYMBOLS Indicates instrument damage can occur if indicated operating limits are exceeded Indicates hazardous voltages L Indicates earth ground terminal WARNING A WARNING note denotes a hazard It calls attention to a procedure practice or the like which if not correctly performed or adhered to could result in personal injury Do not proceed beyond a WARNING sign until the indicated conditions are fully understood and met CAUTION A CAUTION note denotes a hazard It calls attention to an operation procedure practice or the like which if not correctly performed or adhered to could result in damage to or destruction of part or all of the pr
59. trument chassis To remove the main deck on Options 020 and 021 disconnect the input cable connectors at the back panel Remove the main deck screws then lift one side of the Main deck up until it clears the side strut To remove MP14 RF module from MP13 main deck remove the four screws that hold the module to the main deck Instrument Assembly Procedure Note that Option 020 and 021 instruments differ from the standard and other option models in that the main deck and transformer locations inside the instrument are reversed when compared to the standard and other option models as shown in Figures 7 and 8 In Option 020 and 021 models the RF module is in the rear of the instrument and the transformer is mounted in the front left corner Use the correct torque wrench when installing sub miniature connectors Do not exceed the following torque settings for this instrument 1 5 Nm for the 3 mm T 10 screws 2 0 Nm for the 4 mm T 15 screws 22 Microwave Converter 11793A 10 11 12 30 Place the RF Module upside down with the semi rigid coax cables pointing to the left Position the main deck over the module with the four holes in the deck aligning with the four screw holes in the module base The A1 assembly mounting stand offs on MP13 main deck should be upside down and on the opposite side of MP13 from the assembler Attach with four screws Take the main deck assembly coax cables facing to the
60. uick disconnect type 28 11793A Microwave Converter 10 38 Turn the instrument around so that the front of the instrument faces to the operator s left Desolder the 6 5 4 and 0 blue green yellow and black wires from the 1 assembly To remove Ti power transformer and its mounting bracket unscrew the four screws located on MP20 mounting bracket Separate transformer and the mounting bracket by removing the four long screws passing through the transformer case To remove the Al assembly disconnect W12 gray ribbon cable at AlJ1 board connector unscrew the two screws at the VR3 heat sink and turn the three board mounting stand offs a 1 4 turn counterclockwise To remove MP13 main deck and MP14 RF module remove the six Torxhead screws located on the top and bottom of 1 front frame Remove the six screws connecting 2 side struts to MP13 main deck While supporting MP9 10 front and sub panel in one hand carefully slide MP13 main deck forward through the front frame opening just enough to reach the Inside cable connections CAUTION Be careful that you do not bend the coax cables Possible attenuation or interference of the RF signal may result a When inside connections can be reached use a 5 16 open end wrench to disconnect the semi rigid coaxial cables from the front panel connectors b Carefully set aside the front panel and slide the main deck assembly out of the ins
61. y still be charged even if the instrument has been discon nected from its source of supply For continued protection against fire hazard re place the line fuse s only with 250V fuse s of the same current rating and type for example normal blow time delay etc Do not use repaired fuses or short circuited fuseholders Microwave Converter Model 11793A M MODEL 11793A IF INPUT CABLE HP Part Number 11793 60006 FREQUENCY CONTROL CABLE HP Part Number 8120 1838 LO INPUT CABLE HP Part Number 11793 60009 LINE POWER CABLE Figure 1 HP Model 11793A Microwave Converter with Accessory Cables Model 11793A Microwave Converter 1 GENERAL INFORMATION This Operating and Service Manual contains information about initial inspection operation performance tests adjustments troubleshooting and repair of the HP Model 11793A Microwave Converter 2 Specifications The HP 11793 Microwave Converter does not have hard specifications against which the instrument can be tested for performance standards or limits Instead the Local Oscillator LO Requirements are listed in Table 1 These requirements are the performance standards or limits against which the instrument can be tested The supplemental characteristics listed in Table 2 are not warranted requirements but are typical characteristics included as additional information for the user Table 1 LO Requirements LO Amplitude Range Frequency

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