P6201 900 MHz FET Probe Instruction Manual
Contents
1. ball N 4 1 HEN ESTE MI EE 2 1 100 kHz 1 MHz 100 MHz 1000 MHz gt CW FREQUENCY Maximum non destruct input voltage Maximum usable input voltage Fig 1 3 P6201 Probe and probe with attenuator typical voltage derating with frequency 1 3 Section 2 6201 Probe OPERATING INSTRUCTIONS General The P6201 Probe is an active probe designed to use with instruments having either a 50 ohm or a 1 megohm input impedance The probe is terminated into an internal switchable 50 ohm termination when it is used with instruments that have a 1 megohm input impedance The P6201 can be powered from the Probe Power output of a 7000 Series indicator 475 and 485 Oscilloscopes or from a Type 1101 Accessory Power Supply Probe attenuation is 1X within 3 when terminated into 50 ohm Additional attenuation is provided by two 10X and 100X accessory attenuators that plug onto the probe head These provide attenuation up to 100X 1X probe and 100X attenuator The attenuators cannot be stacked They are matched or compensated to the probe head but not to each other When the probe is properly terminated into 50 ohms its frequency response is DC to 900 MHz equivalent to risetime of 389 ps or less The probe includ2. DI 47PF 5 50V CAPRFXD CERAMIC MLC 100PF 10 100V NPO 0 08X0 05 CAPFXD CER DI 100PF 2 100V CABFXD CER DI 4 7PF 0 25PF 100V DI 4 7PF 5 50V CAPFXD CER DI 470PF 10 100V CABFXD CERAMIC MLC 470PF 296 25V NPO 0 08X0 05 CABFXD CER DI 470PF 10 100V CAPFXD CERAMIC MLC 470PF 2 25V NPO 0 08X0 05 DI 470PF 10 100V CAPFXD CERAMIC MLC 470PF 2 25V NPO 0 08X0 05 CAPFXD CER DI 1PF 0 25 50V CABFXD CER DI 2 5PF 0 25PF 100V CABVAR PLASTIC 1 5 6 0PF 25V CAPFXD ELCTLT 1UF 20 35V TANTALUM CAPFXD ELCTLT 1UF20 35V CAPFXD ELCTLT 1UF20 35V TANTALUM CAPFXD ELCTLT 1UF20 35V CAPFXD PLASTIC 0 22UF 10 100V CAPFXD CER DI 0 0022UF 20 50V CAP VAR CER DI 5 25PF 100V CAP VAR CER DI 7 45PF 100WVDC SUBMIN CER DISC TOP ADJ CABVAR CER DI 7 45 PF 100V CABVAR CER DI 7 45PF 100V CABFXD CER DI 82PF 8 2PF500V Mfr Code 80009 80009 80009 80009 80009 04222 04222 04222 04222 54583 51642 04222 04222 04222 04222 04222 29454 04222 29454 04222 29454 54583 04222 51406 24546 24165 24546 24165 84411 04222 59660 59660 59660 51406 52763 Mfr Part No 6702210XX 6702211XX 6702212XX 6702296XX 6702297XX 08051A2R5CATBE 08051A2R5CATBE 10051A4R7CATBA 08055A4R7DATMC C2012C0G1H010C S150 050 N750 4 08051A101KA2075 08051A101GA1BC 10051A4R7CATBA 08055A4R7DATMC 10051A471KATMC 250R
3. 27 211 0183 00 1 SCREW CAP 4 40 X 0 5 SCH STL CD PL HEX 50394 ORDER BY DESC REC 28 204 0533 01 1 BODY PROBE OUTER 80009 204053301 29 131 1271 00 1 CONTACT ELEC READOUT 80009 131127100 RING BRS CU SN ZN PL P6201 Probe Fig amp Index Tektronix Serial No Mfr No Part No Effective Dscont Qty 12345 Name amp Description Code Mfr Part No 30 342 0151 00 1 INSUL RDOUT CON DELRIN 80009 342015100 31 204 0532 01 1 BODY PROBE INNER W INSUL 80009 204053201 32 206 0200 00 1 TIPPROBE P6201 80009 206020000 33 015 0222 00 1 TIPPROBE IC TEST 80009 015022200 34 1 CKT BOARD ASSY PROBE SEE A1 REPL 35 131 0778 00 1 CONN PLUG ELEC LEMO 2 MALE 2 FEMALE TK1312 FFA OS 304 CLAC 36 1 SWITCH SLIDE SEE 55200 REPL 37 214 2250 00 1 INSULATOR PLATE SLIDE SWITCH FISH PAPER OJ9P9 214 2250 00 398 1 BOARD ASSY L F OUTPUT AMP SEE A5 REPL 39 386 2270 00 1 SUPPORT CKT BD TOP 80009 386227000 210 1256 00 B080337 3 WASHER FLAT 0 04 ID X 0 157 OD X 0 02 TEFLON 80009 210125600 40 366 0494 04 1 KNOB GY 0 127 ID X 0 5 OD X 0 531 H 80009 366049404 213 0153 00 1 SETSCREW 5 40 X 0 125 STL TKO392 ORDER BY DESCP 41 210 0583 00 1 NUT PLAIN HEX 0 25 32 X 0 312 BRS CD 73743 2 20319 402 42 386 2265 00 1 PANEL FRONT OUTPUT AMPLIFIER 9 9 386 2265 00 43 386 2267 00 010100 073445 1 SUPPORT CKT BD REAR 80009 386226700 386 2267 02 B073446 1 SUPPORT CKT BD
4. R310 R325 R330 R330 R335 R340 R345 R350 R355 R365 R365 R365 R368 R370 R375 Part No 321 0388 00 315 0104 00 311 0634 00 311 1263 00 321 0452 00 315 0474 00 311 1271 00 321 0151 00 321 0978 01 317 0514 00 321 0293 03 321 0381 03 308 0714 00 325 0121 00 308 0715 00 321 0223 00 315 0182 00 317 0300 00 317 0102 00 317 0911 00 321 0193 00 322 0126 00 317 0300 00 311 1260 00 317 0270 00 321 0080 00 322 0126 00 315 0102 00 317 0151 00 325 0051 00 317 0220 00 321 5004 00 317 0102 00 311 0978 00 317 0201 00 Serial Effective Dscont 010100 046190 RES FXD FILM 107K OHM 1 0 125W TC TO B046191 010100 046191 010100 046191 010100 046191 076840 010100 030000 076840 010100 076840 010100 046191 076840 010100 046190 046191 046190 029999 076839 029999 046190 076839 050863 amp Description RES FXD FILM 100K OHM 5 0 25W RES VAR NONWW TRMR 500 OHM 0 5W RES VAR NONWW 1K OHM 10 0 50W RES FXD FILM 499K OHM 1 0 125W TC TO RES FXD FILM 470K OHM 5 0 25W RES VAR NONWW TRMR 50K OHM 0 5W RES FXD FILM 365 OHM 1 0 125W TC TO RES FXD FILM 11 02K OHM 0 1 0 125W T T2 RES FXD CMPSN 510K OHM 5 0 125W RES FXD FILM 11 0K OHM 0 25 0 125W TC T2 RES FXD METAL FILM 90 5K OHM 0 25 0 125W TC 50 PPM RES FXD WW 46 4 OHM 1 1W RES FXD FILM 90K OHM 0 5 0 05W
5. 0435 ORDER BY DESC 8 131 1135 00 1 CONTACT ELEC CKT CONN CU GLD 80009 131113500 PL 9 342 0134 00 1 INSULATOR BSHG 0 086 ID X 0 275 OD X 0 8 L 80009 342013400 10 131 1257 00 1 CONTACT ELEC BNC CTR COND BRASS SIL PL 80009 131125700 11 358 0072 00 1 INSULATOR BSHG 0 192 ID X 0 192 OD X 0 323 80009 358007200 12 204 0472 00 1 CONN BODY RCPT BNC LOCKING 24931 OC156 1 13 131 1049 00 1 CONTACT ELEC CONN READOUT CU BE SIL PL TK1326 ORDER BY DESC 14 342 0076 00 2 INSULATOR CONN NYLON 80009 342007600 15 205 0142 00 1 SHELL ELEC CONN BNC LOCKING 80009 205014200 16 204 0473 01 1 CONN BODY RCPT BNC COMP BOX 24931 ORDER BY DESC 17 386 2264 01 1 PANEL REAR OUTPUT AMPLIFIER 80009 386226401 18 210 0021 00 3 WASHER LOCK 0 476 ID INTL 0 018 THK STL OKBO1 ORDER BY DESC 19 358 0454 00 1 BSHG MACH THD 0 437 28 X 0 218 ID BRS 80009 358045400 CU SN ZN PL 0 366 L 20 386 2266 00 2 SUPPORT CKT BD FRONT 80009 386226600 21 131 0787 00 5 PIN PCB PRESSFIT MALE STR 22526 47359 001 0 025 SQ 0 448 X 0 137 TAIL 0 600 L PHOS BRZ 50 GOLD 22 211 0181 00 SCREW MACHINE 2 56 X 0 375 PNH BRS 80009 211018100 23 136 0263 04 5 SOCKET PIN TERM U W 0 025 SQ PINS 00779 85864 2 24 1 SWITCH SLIDE SEE 55250 REPL 25 380 0286 01 1 HSG HALF AMPL LEFT ALUMINUM 80009 380028601 26 175 1276 00 1 ASSY SPELEC 3 26 AWG 54 0 L 80009 175127600
6. 50 0 bnc 5X attenuator Tektronix Part No 011 0060 02 12 Precision 50 2 bnc feed through ter Tektronix Part No 011 0129 00 mination Tektronix Part No 011 0049 01 Tektronix Part No 012 0482 00 13 50 9 bnc feed through termination 14 Precision 50 Q bnc cable 2 required 15 P6201 Probe Tip to bnc Adapter Tektronix Part No 013 0145 00 16 Low capacitance screwdriver Tektronix Part No 003 0675 00 Requires a TEKTRONIX TM 500 or TM 5000 Series Power Module mainframe 5 1 Calibration P6201 Probe TEST EQUIPMENT REQUIRED General The test equipment listed in Table 5 1 or its equivalent is required for complete calibration of the P6201 Specifications given are the minimum necessary for accurate calibration All test equipment is assumed to be correctly calibrated and operating within the given specifications If equipment is substituted it must meet or exceed the specifications of the recom mended equipment PROCEDURE General This procedure uses the equipment listed in Table 5 1 If equipment is substituted contro settings or test equipment setup may need to be altered to meet the requirements of the test equipment used Any needed maintenance should be performed before proceeding with the calibration Troubles which become apparent during the procedure should be corrected immediately Best overall performance will be provided if each adjustment is made to the exact setting even if the CHECK is wi
7. Item 11 and the P6201 Probe Tip to bnc Adapter Item 15 to the high amplitude square wave generator c Connect the probe tip to the adapter d Set the oscilloscope VOLTS DIV to 2 V e Set the P6201 INPUT COUPLING to AC DC OFF SET to OFF and 50 0 TERM to INT f Carefully adjust the generator for a 6 division display 5 5 Calibration P6201 Probe Peak to peak signal compression percentage Peak to peak signal amplitude Fig 5 6 Signal compression measurement g CHECK compression for 5 or less Refer to Fig 5 6 h Return the generator amplitude to minimum i Disconnect the generator 8 Check and Adjust High Frequency Compensa tion a Connect the equipment as shown in Fig 5 2 b Set the P6201 50 0 TERM switch to EXT c Set the sampling oscilloscope VOLTS DIV to 50 mV and TIME DIV to 1 ns d CHECK waveform aberrations must be 5 3 or a total of 7 or less peak to peak in the first 5 ns of the waveform following the step transition and 3 395 or a total of 596 or less peak to peak after the first 5 ns of the waveform ADJUST See Table 5 2 and Fig 5 1 for adjust ments Adjust for optimum transient response and risetime For P6201 s below serial number B076840 If probe com ponents are replaced R185 may have to be changed a lower value will raise the front corner of the square wave and a higher value will lower it R185 is located on the Probe Circuit
8. Part No 670 2210 XX 670 2211 670 2212 XX 670 2296 XX 670 2297 XX 283 0310 00 283 0310 00 283 0311 00 283 5028 00 283 0320 00 283 0332 00 283 0314 00 283 5099 00 283 0311 00 283 5028 00 283 0315 00 283 5138 00 283 0315 00 283 5138 00 283 0315 00 283 5138 00 283 0320 00 283 0310 00 281 0285 00 290 0308 00 290 0267 00 290 0308 00 290 0267 00 285 0919 00 283 0176 00 281 0123 00 281 0158 00 281 0158 01 281 0252 00 281 0528 00 Effective Dscont 010100 010100 060000 076840 010100 082466 010100 082466 010100 082466 010100 082466 010100 082466 010100 010100 076840 010100 046191 010100 079000 010100 046191 060000 081970 039999 059999 076839 082465 082465 082465 082465 082465 082465 076839 046190 078999 046190 059999 081769 amp Description CIRCUIT BD ASSY PROBE CIRCUIT BD ASSY ATTENUATOR CIRCUIT BD ASSY 100X ATTEN CIRCUIT BD ASSY HI FREQ OUTPUT AMPLIFIER CIRCUIT BD ASSY LOW FREQ OUTPUT AMPLIFIER CABFXD CER DI 2 5PF 0 25PF 100V NONREPLACEABLE SUBPART OF 670 2211 XX CABFXD CER DI 2 5PF 0 25PF 100V CABFXD CER DI 4 7PF 0 25PF 100V DI 4 7PF 5 50V CABFXD CER DI 1PF 0 25 50V NONREPLACEABLE SUBPART OF 670 2212 XX
9. Scope h 6201 risetime is 0 39 ns or less 10 Check and Adjust 10X and 100X Attenuator Compensation a Connect the P6201 and equipment as shown in Fig 5 3 with the P6201 10X or 100X attenuator on the probe tip b Set the P6201 50 9 TERM switch to INT c Set the oscilloscope VOLTS DIV to 10mV and TIME DIV to 10 us d Set the square wave generator for a 100 kHz 5 divi sion display For a square leading corner on the wave form Calibration P6201 Probe Attenuator compensation adjustment C2 10 C22 100X Fig 5 7 Location of attenuator compensation adjustment f ADJUST C2 10X or C22 100X Attenuator Com pensation for a square leading corner on the display See Fig 5 7 for adjustment location This completes the calibration procedure Disconnect all test equipment and replace the output amplifier housing halves covers 5 7 P6201 Probe Replaceable Electrical Parts Parts Ordering Information Replacement parts are available from or through your local Tektronix Inc Field Office or representa tive When ordering parts include the following informa tion in your order part number instrument type or number serial number and modification number if applicable If a part you have ordered has been replaced with a new or improved part your local Tektronix Inc Field Office or representative will contact you concerning any change in part
10. Zip Code 32997 BOURNS INC 1200 COLUMBIA AVE RIVERSIDE CA 92507 2114 TRIMPOT DIV 51406 MURATA ERIE NORTH AMERICA INC 2200 LAKE PARK DR SMYRNA GA 30080 HEADQUARTERS AND GEORGIA OPERATIONS 51642 CENTRE ENGINEERING INC 2820 E COLLEGE AVE STATE COLLEGE PA 16801 7515 52262 MICROPLEX INC 2126 S LYON ST SANTA ANA CA 92705 5304 52763 STETCO INC 3344 SCHIERHORN FRANKLIN PARK IL 60131 54583 TDK ELECTRONICS CORP 12 HARBOR PARK DR PORT WASHINGTON NY 11550 56845 DALE ELECTRONICS INC 2300 RIVERSIDE BLVD NORFOLK NE 68701 2242 PO BOX 74 59660 TUSONIX INC 7741 N BUSINESS PARK DR TUCSON AZ 85740 7144 PO BOX 37144 64537 KDI ELECTRONICS INC 31 FARINELLA DR EAST HANOVER NJ 07936 SUBSIDIARY OF KDI CORP 73138 BECKMAN INDUSTRIAL CORP 4141 PALM ST FULLERTON CA 92635 BECKMAN ELECTRONIC TECHNOLOGIES SUB OF EMERSON ELECTRIC 79727 C W INDUSTRIES 130 JAMES WAY SOUTHAMPTON PA 18966 3818 80009 TEKTRONIX INC 14150 SW KARL BRAUN DR BEAVERTON OR 97077 0001 PO BOX 500 80031 MEPCO ELECTRA INC 22 COLUMBIA RD MORRISTOWN 07960 84411 AMERICAN SHIZUKI CORP 301 WEST O ST OGALLALA NE 69153 1844 OGALLALA OPERATIONS 91637 DALE ELECTRONICS INC 2064 12TH AVE COLUMBUS 68601 3632 609 P6201 Probe Component Tektronix Number 1 2 4 5 C1 C2 C3 C3 C3 C21 C22 C23 C100 C100 C120 C120 C130 C130 C140 C140 C150 C150 C155 C160 C160 C170 C170 C180 C180 C200 C210 C220 C220 C220 C220 C230
11. 1 shows the location of these controls The BNC output connector is an integral part of the offset housing The locking type BNC connector couples scale factor readout information from the 10X and 100 attenuators to instruments having the readout capability 7 Probe Body 4 N Finger Guard Outer Probe Body PROBE 50 2 TERM INT For High Impedance 1 Inputs or EXT For 50 ohm Inputs DC Offset Voltage Vartable Fully Clockwise Maximum Voltage DC OFFSET Polarity Selector INPUT COUPLING OUTPUT AMPLIFIER INPUT POWER CONNECTOR Fig 2 1 Probe connectors and controls 2 1 Operating Instructions P6201 Probe The offset range of the DC OFFSET VARIABLE control is at least 5 6 volts The DC OFFSET polarity and is selected by the OFF switch Adding either of the two attenuators 10X and 100X increases the offset range by the attenuation factor of the attenuator up to a maximum usable voltage of 200 volts for 100X 62 V for 10X The INPUT COUPLING switch selects whether the input signal is AC or DC coupled into the probe The output of the P6201 Probe must always be terminated into 50 ohms This is accomplished by connec ting an internal 50 ohm termination 50 2 TERM switch set to INT into the probe output circuit when the probe is connected to an oscilloscope having a 1 megohm input impeda
12. 3 Setup for testing with real time oscilloscope 5 3 Calibration P6201 Probe 3 Check and Adjust High Frequency Gain and Cross Over Phase a Connect the P6201 and equipment as shown in Fig 5 3 b Set the oscilloscope TIME DIV to 2ms and VOLTS DIV to 50 mV Set the fast rise generator Item 3 to 10 kHz and adjust the amplitude for a 5 division display c ADJUST R370 High Frequency Gain and C220 Cross Over Phase for optimum flatness on the top of the waveform Refer to Figs 5 4 and 5 5 d Disconnect the fast rise generator and termination from the P6201 tip and adapter NOTE High Frequency Gain and Cross Over Phase adjust ments interact with High Frequency Compensation adjustments If any adjustments are made parts 3 or 8 of this procedure the other part should be per formed This should be continued until no further justments are made 4 Check Gain a Connect a precision bnc cable 14 from the am plitude calibrator Item 5 to the oscilloscope with a 50 0 termination Item 13 at the oscilloscope b Set the oscilloscope VOLTS DIV to 50 mV and the amplitude calibrator for a 5 division display a PG506 dial reading of 500 mV produces 250 mV into 50 ohms resulting in a 5 division display at 50 mV div Adjust the amplitude calibrator or the oscilloscope VOLTS DIV VARIABLE if necessary to obtain a display that Is exactly 5 divisions in amplitude d Disconnect the cable an
13. 365 0022 10 4154 R270 C220 510k 7 150 R290 90 9k FROM GND FROM C180 gt 7V FROM 170 gt 10V C240 22 R298 R293 46 4 76 MOUNTING SCREWS gt 15V milti gt 15V P6201 6 12 670 2297 01 AS DC LF AMPLIFIER DC LF AMPLIFIERS PARTIAL CASE as lt gt P6201 Probe 1 8 5 LI 238 1 8k TO 50 ohm OSCILLOSCOPE FROM P205 205 STRIP LINE 5 9 375 4 7 R398 R368 8375 50 SEL SEL R399 150 C330 C320 EXT 470 47 M 1 213 27 50 1 R397 100 FROM P201 2201 7 0350 ue FLATNESS R393 100 FROM 5 149 DC LF AMPLIFIER R395 C360 Cass amp 2 7k 0 1 25 1 1 5pF L393 L310 H305 10V 0 5uH 3T 30 FROM 202 2202 R345 R340 200 305 150 1 5pF 66 5 FROM P203 J203 C350 1uF FROM P204 Il 10V FROM J1 3 lt gt MOUNTING SCREWS 670 2296 03 6201 AMPLIFIER 4 4 AMPLIFIER PARTIAL CASE 2222 2222 2222 2222 2220 22 22 20 2000 P6201 Probe P6201 Probe Replaceable Mechanical Parts Parts Ordering Information Replacement parts are available from or through your local Tektronix Inc service center or represen tative Changes to Tektronix instruments are sometimes made to accommodate improved components as they become available and to give you the benefit of the latest circuit impro
14. 4 Use of Probe Accessories The standard accessories supplied with the P6201 Probe facilitate connecting the probe into a test circuit Use as follows Retractable Hook Tip Slip on over probe tip Pull back at flange while holding probe body to expose the hook tip 12 inch Ground Lead Screw one threaded end into side of probe body The minigator clip may be screwed onto the other end Insulating Sleeve The small plastic tube may be slid over the probe tip to insulate the ground surface just behind the tip when probing in compact circuitry Ground Electrical Contact and Ground Contact Insulator The spring is slid over the probe tip for making short signal ground connections The insulating sleeve is then slipped over the spring to reduce the possibility of shorts Probe fip to Test Point Jack Adapter The adapter is slipped on over probe tip to provide a smaller probe tip diameter The adapter adds approximately 1 pF to the input capacitance of the probe Section 3 P6201 Probe CIRCUIT DESCRIPTION The P6201 Probe system uses a DC re insertion amplifier technique to obtain low drift and broad band performance The input signal is simultaneously coupled in parallel paths to the AC Amplifier and the DC amp Low frequency Amplifier See Fig 3 1 Outputs from these stages are combined in the Output Amplifier DC amp Low frequency Amplifier The input signal is coupled through R130 and the INPUT COUPLING switch
15. Inc and therefore are not available from other sources Order all special parts directly from your TEKTRONIX Field Office or representative Include the following information The instrument type and serial number a complete description of the part as described in the Parts List and if it is an electrical component give the circuit number Circuit Boards Wired circuit boards for the P6201 Probe and Output Amplifier can be ordered from Tektronix Inc Refer to the Parts List for information on how to order The following procedures describe the removal or replacement of these circuit boards Probe Circuit Board Replacement Remove the outer probe body and probe tip see Fig 4 1 Unsolder all wires including the one connected to the readout contact ring Slide the readout contact ring onto the probe cable to position it out of the way Use special care when unsoldering the coaxial connections so as not to melt the dielectric Using a de soldering tool such as size 3 solder wick material and a 50 watt soldering iron remove as much solder as possible from the three circuit board solder connections to the inner probe body To separate the circuit board from the inner probe body slide a thin knife blade between the circuit board and the inner probe body Be careful not to twist the circuit board as it is being separated from the inner probe body To install the circuit board insert the front of the circuit board into the nose of the
16. TC TO RES FXD WW 78 OHM 1 RES FXD FILM 2 05K OHM 1 0 125W TC TO RES FXD FILM 1 8K OHM 5 0 25W SELECTABLE IN RANGE OF 15 OHM TO 30 OHM 5 0 125W FOR BEST RESPONSE IN COMBINATION WITH Q300 Q320 AND U200 RES FXD CMPSN 30 OHM 5 0 125W RES FXD CMPSN 1K OHM 5 0125W RES FXD CMPSN 910 OHM 5 0 125W RES FXD FILM 1K OHM 1 0 125W TC TO RES FXD FILM 200 OHM 1 0 25W TC TO RES FXD CMPSN 30 OHM 5 0 125W RES VAR NONWW TRMR 250 OHM 0 5W RES FXD CMPSN 27 OHM 5 0 125W RES FXD FILM 66 5 OHM 1 0 125W TC TO RES FXD FILM 200 OHM 1 0 25W TC TO RES FXD FILM 1K OHM 5 0 25W RES FXD CMPSN 150 OHM 5 0 125W RES FXD FILM 18 2 OHM 1 0 5W TC TO AXIAL LEADS RES FXD CMPSN 22 OHM 5 0 125W RES FXD METAL FILM 22 1 OHM 1 0 125W 100 PPM RES FXD CMPSN 1K OHM 5 0125W RES VAR NONWW TRMR 250 OHM 0 5W RES FXD CMPSN 200 OHM 5 0 125W NOMINAL VALUE SELECTED Mfr Code 91637 TK1727 32997 32997 91637 TK1727 32997 91637 19701 01121 19701 19701 91637 64537 91637 91637 TK1727 TK1727 TK1727 TK1727 91637 91637 TK1727 32997 TK1727 91637 91637 TK1727 01121 19701 TK1727 91637 TK1727 73138 TK1727 P6201 Probe Mfr Part No CMF55116G10702F SFR25 2322 181 3329 158 501 3329 158 102 CMF55116G49902F SFR25 2322 181 3329 158 503 CMF55116G365ROF 5033RD11K02D BB5145 11 00 5033RC90K90C RS1A B46R40F 50 90 K OHM RS 1A 90 78ROOF CMF55
17. divided and arranged by assemblies in numerical sequence e g assembly Ai with its subassemblies and parts precedes assembly A2 with its subassemblies and parts Chassis mounted parts have no assembly number prefix and are located at the end of the electrical parts list Tektronix Part No column 2 of the parts list Indicates part number to be used when ordering replacement part from Tektronix P6201 Probe Serial No columns 3 amp 4 of the parts list Column three 3 indicates the serial number at which the part was first used Column four 4 indi cates the serial number at which the part was re moved No serial number entered indicates part is good for all serial numbers Name amp Description column five of the parts list In the parts list an item name is separated from the description by a colon Because of space limita tions an item name may sometimes appear as incomplete For further item name identification the U S Federal Catalog handbook H6 1 can be utilized where possible Mfr Code column 6 of the parts list Indicates the code number of the actual manufactur er of the part Code to name and address cross reference can be found immediately after this page Mfr Part No column 7 of the parts list Indicates actual manufacturer s part number CROSS INDEX MFR CODE NUMBER TO MANUFACTURER Mfr Code Manufacturer Address City State Zip Code TK1727 PHILIPS NED
18. inner probe body then align the rear of the circuit board with the step near the rear of the inner probe body see Fig 4 2 The remainder of the installation is a reversal of the removal procedure Readout contact ring positioned out of way step for circuit board alignment Probe tip removed Fig 4 2 Probe circuit board replacement Maintenance P6201 Probe Output Amplifier Circuit Board Replacement Remove the two housing halves of the cover see Fig 4 1 Unsolder all wires including the center conductor of the coaxial cable Use a de soldering tool such as size 3 solder wick material to clear the wire holes for later re insertion of the wires Remove the screws washers and nuts and remove the circuit boards To install the circuit board reverse the removal procedure Attenuator Circuit Board Replacement Unscrew the attenuator insulator and attenuator tip see Fig 4 1 Using a pair of long nose pliers extract the circuit To install the circuit board reverse the removal procedure Be careful to position the compensation adjust ment opposite the hole in the outer attenuator body Probe Cable Replacement Remove the outer probe body and the two housing halves of the output amplifier cover see Fig 4 1 Unsolder all wires including the coaxial wire on both ends of the probe cable It is not necessary to unsolder the input power cable wires inside the output amplifier Unsolder and remove the input power co
19. poor connections damaged parts and bent leads The remedy for most defects is obvious however if heat damaged components are noticed it is an indication that other trouble is present in the circuit and measures should be taken to check this out When inspecting the circuit boards a good magnifying glass or low power eye glass approximately 4X will aid in conducting a thorough visual check Transistor and Integrated Circuit Checks Periodic checks of transistors FET s and IC s are not recommended The best measure of semiconductor perfor mance is operation in the circuit This is checked during the recalibration of the probe Any substandard components will usually be detected at this time Recalibration To ensure accuracy the probe should be checked about every 1000 hours of operation or every six months if used occasionally The calibration procedure will usually indicate potential problems so that corrective measures can be taken before the probe fails to function properly 4 2 TROUBLESHOOTING The following describes a few aids that may assist in locating any trouble After the defective component has been located refer to Corrective Maintenance procedure for removal and replacement instructions Before looking for trouble in the probe check to ensure that the oscilloscope or associated equipment is operating properly Diagram The circuit diagram of the P6201 Probe is given at the rear of the manual Circuit n
20. probe head and not each other Attenuator compensation is possible with an insulating screwdriver through the hole in the side of the attenuator outer body First Time Operation 1 Connect the P6201 to the input connector of the test oscilloscope NOTE Push the probe tightly against the instrument panel while tightening the BNC connector shell to assure good contact of the readout tab to the oscilloscope plug in readout ring 2 Set the 50 TERM DC OFFSET polarity and INPUT COUPLING switches to their correct or destred positions Operating Instructions P6201 Probe 3 Connect the probe power connector to the power receptacle on the back panel of the oscilloscope or the 1101 Accessory Power Supply 4 Set the oscilloscope Volts Div to 10 mV Switch the oscilloscope Input Coupling to GND center the oscillo scope sweep with the centering controls then switch the oscilloscope amplifier Input Coupling to DC 5 Connect the probe to the signal source see Signal Connectors and note the oscilloscope display 6 Adjust the DC Offset controls through their range with the polarity switch in either position and note their effects on the display See Using DC Offset Use of DC Offset The probe offset capability allows the input signal to be positioned to the center of the dynamic window or operating range of the probe amplifier This assures optimum probe transient response To prepare the probe for this operation switc
21. to U200 an operational amplifier When AC coupling is selected C200 blocks the DC signal path C220 5 25 pF variable bootstraps the input capac itance at pin 2 of U200 This serves to stabilize the crossover of the DC amp Low frequency system to the AC system The VARIABLE control R200 and the position selected on the DC OFFSET switch determine the offset voltage applied to the input pin 2 of U200 R200 is adjusted to bring pin 2 to zero volts with up to 55 6 V at Fig 3 1 P6201 Probe Block Diagram the input side of R130 The Output Zero adjustment R250 provides a DC balance between pins 2 and 3 Ground signals are coupled through R290 to pin 3 of U200 which serves to cancel ground difference signals between the probe body and the output box Overall low frequency gain is set by a 10X division of the input signal through R130 and R265 and the X10 gain set resistors R280 and R295 for the low frequency closed loop gain The output signal from U200 is coupled via terminal A and R397 to the base of AC amp High frequency Amplifier System AC signal components are coupled to the gate of O100 FET through R100 R120 and C100 100 is connected as a source follower providing high input resistance and low noise performance at the probe input O120 and O130 are emitter follower stages which provide high frequency current gain and impedance isolation between input and output The output signal from t
22. 065 00 311 1413 00 311 2247 00 321 0263 00 315 0512 00 Serial No Effective Dscont 8514 B010100 B081605 010100 081605 010100 083950 010100 060000 010100 076840 076840 082466 084163 010100 076840 082466 010100 073446 010100 046191 081604 081604 083949 059999 076839 082465 082465 084162 076839 082465 073445 046190 amp Description TRANSISTOR NPN SI MACRO T TRANSISTOR SIG BIPOLAR NPN 45V 50MA 40MHZ AMPLIFIER RES FXD FILM 900K OHM 0 5 0 125W TC TO RES FXD CMPSN 50 OHM 10 0 075WPELLET W PARALLEL LEADS RES FXD FILM 49 9 OHM 1 0 062W RES FXD CMPSN 68 OHM 5 0 125W NONREPLACEABLE SUBPART OF 204 0557 00 RES FXD FILM 990K OHM 0 5 0 125W TC TO RES FXD CMPSN 50 OHM 10 0 075WPELLET W PARALLEL LEADS RES FXD FILM 49 9 OHM 1 0 062W RES FXD FILM 11 1K OHM 1 0 05W TC TO RES FXD CMPSN 43 OHM 5 0 125W RES FXD FILM 43 2 OHM 1 TC 100PPM RES FXD CMPSN 22 OHM 5 0 125W NONREPLACEABLE SUBPART OF 204 0558 00 RES FXD CMPSN 50 OHM 10 0 075WPELLET W PARALLEL LEADS RES FXD FILM 27 OHM 1 0 075WTC 150PPM DEGC RES FXD FILM 90K OHM 0 5 0 05W TC TO RES FXD CMPSN 10M OHM 5 0 125W RES FXD CMPSN 2K OHM 5 0 125W RES VAR NONWW TRMR 1K OHM 25 RES FXD METAL FILM 825 OHM 1 0 125W TC 100 RES FXD FILM 1 3K OHM 1 0 125W1206 PKG SMD RES FXD CMPSN 1K OHM 5 0125W RES FXD CMPSN 5
23. 0X Noise Tangential DC Stability Drift with Temperature Change Probe Only Probe and Amplifier Output Impedance 50 TERM Switch Set to INT Output Load Required 50 Q TERM Switch Set to EXT Signal Delay Probe Tip to Amplifier Output Maximum Non De struct Input Voltage AC or DC Coupled 1X 10X and 100X LF Response 3 db AC Coupled 0 6 V 1 2 peak to peak maxi mum with 5 6 V DC offset 6 12 peak to peak maxi mum with 56 V DC offset 60 V 120 V peak to peak maxi mum with 200 V DC offset Not to exceed 200 V DC peak AC uV or less at output 150 RMS Less than 50 uV C at output Less than 300 C at output 25 Q for use with 1 inputs 50 92 within 1 Q 211 2 ns Differential delay be tween two probes 0 1 ns or less 50 V derated with frequency See voltage versus frequency curve 200 V DC peak CAT derated with frequency See voltage versus frequency curve 10 Hz or lower 10X attenuator extends LF response to 1 Hz With 100X attenuator LF response is 10 Hz 1 1 Characteristics P6201 Probe ELECTRICAL CHARACTERISTICS cont PHYSICAL CHARACTERISTICS cont Power Requirements 15 V at 105 mA and 15 V at 4 head 4 780 110 mA Total power 3 2 W inches 12 14 cm Attenuator Head Diameter 0 690 inch 1 75 PHYSICAL CHARACTERISTICS Dimensions maximum outside d
24. 10 OHM 5 0 125W RES FXD CMPSN 160 OHM 5 0 125W RES FXD CMPSN 300 OHM 5 0 125W SELECTABLE IN RANGE OF 90 OHM TO 3K OHM 5 0 25W FOR BEST RESPONSE IN COMBINATION WITH CABLE ASSEMBLY AND 1 BD RES FXD CMPSN 50 OHM 10 0 075WPELLET W PARALLEL LEADS RES FXD FILM 46 4 OHM 0 5 0 05W TC 2 150PMM RES FXD FILM 45 3 OHM 196 0 125W1206 PKG SMD RES VAR NONWW PNL 5K OHM 0 75W RES VAR NONWW PNL 5K OHM 20 0 5W RES FXD FILM 5 36K 196 0 125 10 RES FXD FILM 5 1K OHM 5 0 25W Mfr Code 25403 04713 19701 23223 56845 TK1727 19701 23223 56845 64537 TK1727 56845 TK1727 23223 52262 64537 01121 TK1727 51406 91637 56845 TK1727 TK1727 TK1727 TK1727 23223 14298 56845 80009 12697 91637 TK1727 Mfr Part No BFR91 02 MPS6520 5033RD900KOD 50A10L CRCW0805 49R9FT SFR16 2322 180 5033RD990KOD 50A10L CRCW0805 49R9FT PMESO 11 1 K1 SFR16 2322 180 CRCW080543R2FT SFR16 2322 180 50A10L MCRA270FYZ 50 90 OHM BB1065 SFR16 2322 180 RVG4LO6A 102VM CRCW12068250FT CRCW1206 132FT SFR16 2322 180 SFR16 2322 180 SFR16 2322 180 SFR16 2322 180 50A10L RE 1 8 46 4 OHM CRCW1206 45R3FT 311141300 CM 43464 CMF55116G53600F SFR25 2322 181 Component Tektronix Number R220 R220 R230 R230 R240 R240 R250 R260 R265 R270 R280 R290 R293 R295 R298 R300 R300 8305 R305 R310 R310
25. 11 214 0971 00 2 INSULATOR WSHR 0 047 ID 0 203 OD X 0 0025 80009 214097100 12 344 0102 01 6 CLIBELECTRICAL PROBE GROUND CU 80009 344010201 13 342 0150 00 INSULATOR BSHG 0 3 ID X 0 36 OD X 0 3 L PC 80009 342015000 Figure 6 2 Attenuator Head Exploded View P6201 Probe Fig amp Index Tektronix Serial No Mfr No Part No Effective Dscont Qty 12345 Name amp Description Code Mfr Part No 6 3 1 6201 STANDARD ACCESSORIES 2 013 0135 00 1 TIPPROBE RETRACTABLE HOOK 80009 013013500 3 010 0376 00 1 ATTEN HD PROBE P6201 10X 80009 010037600 4 010 0377 00 1 ATTEN HD PROBE P6201 100X 80009 010037700 5 206 0200 00 3 TIPPROBE P6201 80009 206020000 6 131 1302 00 1 CONTACT ELEC GROUNDING SST 04811 ORDER BY DESC gt 175 0848 02 1 LEAD ELECTRICAL STRD 18 12 25 80009 175084802 8 103 0164 00 1 ADPTR PROBE TIP TEST POINT 80009 103016400 9 344 0046 01 1 CLIPELECTRICAL ALLIGATOR 1 56 LSTL BRT 80009 344004601 DIPPED 10 166 0557 00 1 COVER GROUND 0 381 ID X 0 43 OD X 0 3851 80009 166055700 11 342 0180 00 1 COVER GRD CONT ABS 80009 342018000 12 016 0156 02 1 CASE CRYG PROBE 80009 016015602 070 1306 04 1 MANUAL TECH INSTRUCTION 80009 070130604 352 0351 00 1 HOLDER PROBE BLACK ABS 80009 352035100 OPTIONAL ACCESSORIES 017 0094 00 1 TERMN PROBE 50 OHM 1W 80009 017009400 PERSE TER 0 TEE 010 058 205 Figure 6 3 P6201 Standard and Optional Accessori
26. 116G20500F SFR25 2322 181 SFR16 2322 180 SFR16 2322 180 SFR16 2322 180 CMF55116G10000F CMF6042G200ROF SFR16 2322 180 3329 158 251 SFR16 2322 180 CMF55116G66R50F CMF6042G200ROF SFR25 2322 181 1515 OR RC05G 5023RD18R20F SFR16 2322 180 CRCW120622R1FT SFR16 2322 180 82PR250 37C SFR16 2322 180 P6201 Probe Component Tektronix Number R375 R375 R380 R390 R393 8395 R397 R398 R399 RT360 S200 5250 5300 U200 Part No Serial No Effective Dscont Name amp Description 317 0121 00 050864 8084162 RES FXD CMPSN 120 OHM 5 0 125W 317 0151 00 B084163 322 0119 00 322 0119 00 311 0622 01 317 0272 00 317 0101 00 325 0053 00 317 0151 00 307 0343 00 260 0984 00 260 0960 01 260 0960 01 156 0223 00 SELECTABLE FROM RANGE OF 130 200 OHM RES FXD CMPSN 150 OHM 5 0 125W RES FXD FILM 169 OHM 196 0 25W TC TO RES FXD FILM 169 OHM 196 0 25W TC TO RES VAR NONWW TRMR 100 OHM 0 5W RES FXD CMPSN 2 7K OHM 5 0 125W RES FXD CMPSN 100 OHM 5 0 125W RES FXD FILM 50 OHM 1 0 05W TC TO AXIAL LEADS RES FXD CMPSN 150 OHM 5 0 125W RES THERMAL 200 OHM 1096 SWITCH SLIDE DPTT 0 5A 125V SWITCH SLIDE FORM Z 0 5A 120VDC BLACK BTTN SWITCH SLIDE FORM Z 0 5A 120VDC BLACK BTTN IC LINEAR BIPOLAR OP AMP LOW INPUT BIAS CURRENT UNCOMPENSATED Mfr Code TK1727 01121 91637 91637 32997 01121 TK1727 91637 01121 91
27. 15N471JV4P 10051A471KATMC 250R15N471JV4P 10051A471KATMC 250R15N471JV4P C2012C0G1H010C 08051A2R5CATBE DVS3A6A HV105A 20 9011 173D105X0035V HV105A 20 9011 173D105X0035V TEK35 22 10 10 SR155C222MAA 518 000A5 25 518 006 G 7 45 518 006G7 45 TZO3P450FR169 ADVISE Component Tektronix Number C240 C295 C300 C302 C305 C310 C315 C320 C325 C325 C330 C350 C355 C358 C360 C365 C375 C375 CR200 CR210 L300 L310 L393 Q100 Q100 Q100 Q120 Q120 Q120 Q130 Q130 Q130 Q300 Q300 Q300 Q300 Q320 Q320 Q320 Part No 290 0134 00 283 0139 00 290 0247 00 283 0320 00 283 0220 00 283 0252 00 281 0218 00 283 0315 00 281 0196 00 281 0219 00 283 0325 00 283 0177 00 283 0310 00 281 0218 00 283 0111 00 283 0209 00 283 0311 00 283 5028 00 152 0246 00 152 0246 00 108 0737 00 108 0737 00 108 0170 01 151 1023 00 151 1023 01 151 5025 00 151 0362 01 151 0362 00 151 5055 00 151 0362 01 151 0362 00 151 5055 00 151 0416 00 151 0475 00 151 0475 01 151 0475 00 151 0416 00 151 0475 00 151 0475 01 Serial Effective Dscont B076840 B076840 010100 060647 010100 010100 076840 010100 010100 053095 079000 010100 8514 082466 010100 8514 082466 010100 B030000 BO60000 8514 010100 B030000 B060000 B060646 B029999 B076839 B02
28. 50 Fig 5 1 to return the oscilloscope trace to the graticule center k Connect the DMM leads between the base of Q300 Fig 5 1 and ground CHECK DMM for a reading of 3 3 V 25 m ADJUST Bias Adj R230 Fig 5 1 for a reading of 3 3 V n Disconnect the DMM and temporarily reinstall the two housing halves on the output amplifier Allow the P6201 to warm up for 20 minutes or more with the housing halves in place GR TO BNC ADAPTER TIP TO GR 50 OHM TERMINATION ADAPTER 6201 6201 Fig 5 2 Setup for testing with sampling oscilloscope Calibration P6201 Probe Remove the P6201 housing halves and repeat steps h i and j 2 Check and Adjust Termination Glitch a Connect the P6201 and equipment as shown in Fig 5 2 b Set the P6201 50 0 TERM switch to EXT c Set the sampling oscilloscope VOLTS DIV to 20 and TIME DIV to 5 ns d Locate a glitch approximately 20 ns from the positive step of the waveform This glitch represents the probe s cable length x 2 e ADJUST C160 Serial number B076840 and up only for minimum glitch It may be necessary to increase the sensitivity of the oscilloscope to see the effect of C160 f Disconnect the probe tip and adapter and screw the outer probe body back onto the probe board 7512 7880 5 2 S 53 6201 P6201 pROBE TO BNC ADAPTER gt O S TO PROBE POWER TERMINATION Fig 5
29. 60 04222 80031 59660 04222 04222 04222 59660 04222 51642 04222 04222 27014 27014 OJRO3 OJRO3 OJRO3 80009 04713 04713 80009 04713 04713 80009 04713 04713 80009 25403 80009 25403 80009 25403 80009 P6201 Probe Mfr Part No 150D226X0015B2 SR15A151KAT D5R6EASK1 C2012C0G1H010C SR205C103MAA 08055C102KAT9A 513 011 1 5 10051 471 2805 01038 513 011 5 35 10051A470KATBA SR303E105ZAA 08051A2R5CATBE 513 011 1 5 SR215C104MAA UC35 050 Z5U 10 10051A4R7CATBA 08055A4R7DATMC FDH5227 03 FDH5227 03 108 0737 00 108 0737 00 108 0170 01 151102300 SMCM485 MMBF4416 151 0362 01 SMT1105 MMBR536LT 1 151 0362 01 SMT1105 MMBR536LT 1 151041600 BFR91 02 151 0475 01 BFR91 02 151041600 BFR91 02 151 0475 01 P6201 Probe Component Tektronix Number Q320 Q350 R1 R2 R2 R3 R4 R21 R22 R22 R23 R24 R24 R25 R26 R120 R120 R130 R140 R150 R150 R150 R150 R150 R160 R170 R180 R185 R190 R190 R190 R200 R200 R210 R210 Part No 151 0475 00 151 0341 00 321 0807 01 307 0240 00 325 5043 00 317 0680 00 321 0790 01 307 0240 00 325 5043 00 325 0036 00 317 0430 00 321 5233 00 317 0220 00 307 0240 00 307 0514 00 325 0121 00 317 0106 00 317 0202 00 311 2342 00 321 5017 00 325 5066 00 317 0102 00 317 0511 00 317 0161 00 317 0301 00 307 0240 00 325 0045 00 325 5
30. 637 79727 04426 04426 27014 Mfr Part No SFR16 2322 180 BB1515 OR RC05G CMF6042G169ROF CMF6042G169ROF 3329H K28 101 BB2725 SFR16 2322 180 CMF50 F50ROOF 1515 OR RC05G C140 G 128 S 0012 23 021 043 23 021 043 LM308H SW250 5 LOW FREQUENCY BACK PROBE FET BACK See Parts List for serial number ranges P6201 Probe P6201 Probe HIGH FREQUENCY OUTPUT FRONT HIGH FREQUENCY OUTPUT BACK X10 ATTEN FRONT X10 ATTEN BACK 100 ATTEN BACK See Parts List for serial number ranges 1 R160 C160 LJ LJ ri i C100 Q100 1 5 6 0 p T ap C140 A 0130 ATTENUATOR C120 470 R140 x 10M ik 0150 R170 FET BIAS 1 160 A150 10V 825 10 o __ oO E R1 900k 3 lt PROBE 59 2 4 AMPLIFIER PROBE TIP 670 2211 02 10X ATTENUATOR 670 2212 00 ATTENUATOR P6201 ATTENUATORS amp AC AMPLIFIERS P6201 Probe P6201 Probe OFFSET VARIABLE 5200 OFFSET Oka j logs OFF 2 4 ot R200 6 NG Sk 5 127 100k aa 2 3 isv INPUT COUPLING C200 022 5 5250 210 V7 1 f U200 TO J205 TO J201 TO A4 DC HF AMPLIFIER P202 TO J202 2203 6 TO 4203 P204 TO J204 H 1 22 on 201 P 8250 1 470k 11k 4 50k 2 OUTPUT 26 C230 ZERO 1 R260 C210 82
31. 89 ILLINOIS TOOL WORKS INC ST CHARLES ROAD ELGIN IL 60120 SHAKEPROOF DIV 80009 TEKTRONIX INC 14150 SW KARL BRAUN DR BEAVERTON OR 97077 0001 PO BOX 500 P6201 Probe ge Nu Ae O 22 2257 sy Yv HO FS Cy dili 52 Figure 6 1 P6201 Exploded View P6201 Probe Fig amp Index Tektronix Serial No Mfr No Part No Effective Dscont Qty 12345 Name amp Description Code Mfr Part No 6 1 1 380 0287 01 1 HSG HALF AMPL RIGHT ALUMINUM 80009 380028701 c MEN See 1 SWITCH SLIDE SEE A4S300 REPL 3 386 2400 00 8 010100 B087713 2 SPACER PLATE 0 3 0 5 0 5 DELRIN 80009 386240000 210 0910 00 87714 2 WASHER FLAT 0 19 OD X 0 281 OD X 0 046 80009 210091000 TEFLON 4 131 1134 00 2 CONTACT ELEC CKT BD SHLD CU NI PL 80009 131113400 5 220 0627 00 5 NUT PLAIN HEX 2 56 X 0 156 HEX BRS 73743 10002 56 101 6 210 0053 00 10100 46190 10 WASHER LOCK 42 SPLIT 0 02 THK STL TKO392 ORDER BY DESC 210 0001 00 46191 10 WASHER LOCK 2 INTL 0 013 THK STL 78189 1202 00 00 0541 210 1008 00 10100 046190 10 WASHER FLAT 0 09 ID X 0 188 OD X 0 02 BRS 12327 ORDER BY DESC 7 211 0001 00 8 SCREW MACHINE 2 56 0 25 PNH STL 0435 ORDER BY DESC 7 211 0022 00 8 010100 B046190 2 SCREW MACHINE 2 56 X 0 188 5 0435 ORDER BY DESC 211 0001 00 46191 2 SCREW MACHINE 2 56 X 0 25 PNH STL
32. 9999 053094 078999 8513 082465 8513 082465 029999 059999 8513 029999 059999 8513 amp Description CAPFXD ELCTLT 22UF 20 15V CAPFXD CERAMIC MLC 150PF 10 50V COG 0 138 CAPFXD ELCTLT 5 6UF 10 6V CAPFXD CER DI 1PF 0 25 50V CAPFXD CER DI 0 01UF 20 50V CABFXD CER DI 0 001UF 10 50V CABVAR CER DI 1 5PF 2 2 5 100V DI 470PF 10 100V CABVAR CER DI 10 38PF 250V CABVAR CER DI 5 35PF 2 2 5 100V CAPFXD CER DI 47PF 10 100V CABFXD CER DI 1UF 80 20 25V CABFXD CER DI 2 5PF 0 25PF 100V TEST SELECTABLE CABVAR CER DI 1 5PF 2 2 5 100V CAPFXD CER DI 0 1UF 20 50V CAPFXD CER DI 1UF 20 50V CABFXD CER DI 4 7PF 0 25PF 100V DI 4 7PF 5 50V SEMICOND DVC DI SW SI 40V 200MA DO 7 SEMICOND DVC DI SW SI 40V 200MA DO 7 COIL RF FIXED 40NH COIL RF FIXED 40NH COIL RF FIXED 360NH TRANSISTOR SIG JFET N CH TRANSISTOR FE SI N CHANNEL TRANSISTOR SIG JFET N CH 6V 15MA 4 5MS AMPLIFIER TRANSISTOR PNPSI U 43 TRANSISTOR PNPSI U 43 TRANSISTOR SIG BIPOLAR PNP 10V 30MA 5 5GHZ AMPLIFIER TRANSISTOR PNPSI U 43 TRANSISTOR PNPSI U 43 TRANSISTOR SIG BIPOLAR PNP 10V 30MA 5 5GHZ AMPLIFIER TRANSISTOR NPN SI TRANSISTOR NPN SI MACRO T TRANSISTOR SCREENED TRANSISTOR NPN SI MACRO T TRANSISTOR NPN SI TRANSISTOR NPN SI MACRO T TRANSISTOR SCREENED Mfr Code 24165 04222 12954 54583 04222 04222 596
33. ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES EC Declaration of Conformity Tektronix Holland N V Marktweg 73A 9444 AB Heerenveen The Netherlands declare under sole responsibility that the P6201 meets the intent of Low Voltage Directive 73 23 ECC for Product Safety Compliance was demonstrated to the following specifications as listed in the Official Journal of the European Communities EN 61010 1 Safety requirements for electrical equipment for measurement control and laboratory use EN 61010 2 031 1994 Particular requirements for hand held probe assemblies for electrical measurement and test Contacting Tektronix Phone 1 800 833 9200 Address Tektronix Inc Department or name if known 14200 SW Karl Braun Drive P O Box 500 Beaverton OR 97077 USA Web site www tektronix com Sales support 1 800 833 9200 select option 1 Service support 1 800 833 9200 select option 2 Technical support Email techsupport tektronix com 1 800 833 9200 select option 3 6 00 a m 5 00 p m Pacific time This phone number is toll free in North America After office hours please leave a voice mail message Outside North America contact a Tektronix sales office or distributor see the Tektronix web site for a list of offices Section 1 P6201 Probe CHARACTERISTICS The P6201 is an active FET probe providing unity gain and DC to 900 MHz bandwidth The low input capacitance of the probe permits coupling of
34. Board Refer to Section 4 Maintenance for access instructions 5 6 Table 5 2 Adjustment Use of Adjustment C358 Primarily affects the front corner and the first 1 5 ns of the waveform C315 Adjusted for minimum effect unless other wise necessary to reduce aberrations C325 Affects the first 3 ns of the waveform also has some effect on the front corner ampli tude R330 Transfers energy between the 1st and 2nd 250 ps of the waveform Set fully ccw make the other adjustments and then use R330 to minimize aberrations R393 Affects the flatness on the top of the wave form after the first 3 ns NOTE High Frequency Compensation adjustments interact with High Frequency Gain and Cross Over Phase justments If any adjustments are made in parts 3 or 8 of this procedure the other part should be performed This should be continued until no further adjustments are made 9 Calculate Probe Risetime a Perform parts a b and c of step 8 b Measure the system risetime sampling test oscillo scope plus probe c Disconnect the P6201 and the P6201 Probe Tip to GR 50 0 Termination Adapter d Connect a GR to bnc female adapter Item 9 to the fast rise pulser e Connect a precision 50 Q bnc cable Item 14 from the adapter to the sampling oscilloscope f Measure the sampling oscilloscope risetime g Using the following formula calculate the P6201 risetime Ta 0 Probe System
35. Description Attaching parts always appear at the same indenta tion as the item it mounts while the detail parts are indented to the right Indented items are part of and included with the next higher indentation Attaching parts must be purchased separately unless other wise specified Abbreviations Abbreviations conform to American National Stan dards Institute ANSI standard Y1 1 P6201 Probe CROSS INDEX MFR CODE NUMBER TO MANUFACTURER Mfr Code Manufacturer Address City State Zip Code 392 NORTHWEST FASTENER SALES INC 7923 SW CIRRUS DRIVE BEAVERTON OR 97005 6448 0435 LEWIS SCREW 4300 S RACINE AVE CHICAGO IL 60609 3320 TK1312 LEMO USA INC 335 TESCONI CIR SANTA ROSA CA 95406 PO BOX 11006 TK1326 NORTHWEST FOURSLIDE INC 18224 SW 100TH CT TUALATIN OR 97062 0J9P9 GEROME MFG CO INC PO BOX 737 NEWBERG OR 97132 OKBO1 STAUFFER SUPPLY 810 SE SHERMAN PORTLAND OR 97214 00779 AMP INC 2800 FULLING MILL HARRISBURG PA 17105 PO BOX 3608 04811 PRECISION COIL SPRING CO 10107 ROSE ST EL MONTE CA 91734 PO BOX 5450 12327 FREEWAY CORP 9301 ALLEN DR CLEVELAND 44125 4632 22526 DU PONT E DE NEMOURS AND INC 515 FISHING CREEK RD NEW CUMBERLAND PA 17070 3007 DU PONT ELECTRONICS DEPT 24931 SPECIALTY CONNECTOR CO INC 2100 EARLYWOOD DR FRANKLIN IN 46131 PO BOX 547 50394 SPS TECHNOLOGIES INC HIGHLAND AVE JENKINTOWN PA 19046 UNBRAKO DIV 73743 FISCHER SPECIAL MFG CO 111 INDUSTRIAL RD COLD SPRING KY 41076 9749 781
36. ERLAND BV POSTBUS 90050 5600 PB EINDHOVEN THE AFD ELONCO NETHERLANDS ZMAN MAGNETICS INC 7633 S 180th KENT WA 98032 01121 ALLEN BRADLEY CO 1201 S 2ND ST MILWAUKEE WI 53204 2410 04222 AVX CERAMICS 19TH AVE SOUTH MYRTLE BEACH SC 29577 DIV OF AVX CORP P O BOX 867 04426 ITW SWITCHES 6615 W IRVING PARK RD CHICAGO IL 60634 2410 DIV OF ILLINOIS TOOL WORKS INC 04713 MOTOROLA INC 5005 E MCDOWELL RD PHOENIX AZ 85008 4229 SEMICONDUCTOR PRODUCTS SECTOR 12697 CLAROSTAT MFG CO INC LOWER WASHINGTON ST DOVER NH 03820 12954 MICROSEMI CORP SCOTTSDALE 8700 E THOMAS RD SCOTTSDALE AZ 85252 P O BOX 1390 14298 INSILCO CORP PAMLICO BLDG SUITE 209 RESEARCH TRIAGLE PARK NC 27709 ACIC DIV 3306 EAST CHAPEL HILL NELSON HWY 19701 PHILIPS COMPONENTS DISCRETE PO BOX 760 MINERAL WELLS TX 76067 0760 PRODUCTS DIV RESISTIVE PRODUCTS FACILITY AIRPORT ROAD 23223 CTS CORP 1201 CUMBERLAND AVE WEST LAFAYETTE IN 47902 MICROELECTRONICS DIV 24165 SPRAGUE ELECTRIC CO 267 LOWELL ROAD HUDSON NH 03051 24546 BRADFORD ELECTRONICS 550 HIGH ST BRADFORD 16701 3737 25403 PHILIPS COMPONENTS DISCRETE GEORGE WASHINGTON HWY SMITHFIELD RI 02917 PRODUCTS DIV DISCRETE SEMICONDUCTOR GROUP 27014 NATIONAL SEMICONDUCTOR CORP 2900 SEMICONDUCTOR DR SANTA CLARA CA 95051 0606 29454 JOHANSON DIELECTRICS INC 2210 SCREENLAND DR BURBANK CA 91505 1137 PO BOX 6465 P6201 Probe CROSS INDEX MFR CODE NUMBER TO MANUFACTURER Mfr Code Manufacturer Address City State
37. Instruction Manual Tektronix P6201 900 MHz FET Probe 070 1306 04 Warning The servicing instructions are for use by qualified personnel only To avoid personal injury do not perform any servicing unless you are qualified to do so Refer to all safety summaries prior to performing service www tektronix com Copyright Tektronix Inc rights reserved Tektronix products are covered by U S and foreign patents issued and pending Information in this publication supercedes that in all previously published material Specifications and price change privileges reserved Tektronix Inc Box 500 Beaverton OR 97077 TEKTRONIX and TEK are registered trademarks of Tektronix Inc WARRANTY Tektronix warrants that this product will be free from defects in materials and workmanship for a period of one 1 year from the date of shipment If any such product proves defective during this warranty period Tektronix at its option either will repair the defective product without charge for parts and labor or will provide a replacement in exchange for the defective product In order to obtain service under this warranty Customer must notify Tektronix of the defect before the expiration of the warranty period and make suitable arrangements for the performance of service Customer shall be responsible for packaging and shipping the defective product to the service center designated by Tektronix with shipping charges prepaid Tektro
38. REAR 80009 386226702 44 131 1003 00 1 JACK PCB PELTOLA FEMALE 80009 131100300 STR 0 141 1 0 0 277 H X 0 094 TAIL GOLD 0 295 PCB GRD SHELL 45 210 0223 00 2 TERMINAL LUG 0 26 ID LOCKING BRZ TIN PL OKBO1 210 0223 00 46 1 RESISTOR VAR SEE R200 REPL 47 1 ASSY HF OUTPUT AMPL SEE A4 REPL P6201 Probe Fig amp Index Tektronix Serial No Mfr No Part No Effective Dscont Qty 12345 Name amp Description Code Mfr Part No 6 2 010 0376 00 1 ATTEN HD PROBE 10X 80009 010037600 010 0377 00 1 ATTEN HD PROBE 100X 80009 010037700 1 015 0222 00 1 TIBPROBE IC TEST 80009 015022200 206 0200 00 1 80009 206020000 204 0557 00 1 BODY ATTENUATOR 10X 80009 204055700 204 0558 00 1 BODY ATTENUATOR 100X 80009 204055800 4 1 BOARD ASSY ATTEN 10X SEE 2 REPL 1 CKT BOARD ASSY ATTEN 100X SEE REPL 5 136 0252 00 1 TERM PCB FEMALE STR ACCOM 00779 2 330808 7 0 013 0 020 DIA PIN TIN TIN SLEEVE CLOSED 0 142 L 0 038 DIA 6 131 0845 00 1 CONTACT ELEC CTR PROBE CU SIL PL 80009 131084500 7 384 0680 01 1 PIN STR HEADED 0 41 OD X 0 16 L BRS 80009 384068001 8 210 1045 00 1 WASHER FLAT 0 045 ID X 0 1 OD X 0 01 BRS 80009 210104500 9 210 1047 00 1 WASHER SPR TNSN Y SHAPE NI BE 80009 210104700 10 388 0930 00 1 CIRCUIT BOARD CAPACITOR ROTOR 80009 388093000
39. The power handling capability of the probe and attenu ators is dependent on the series resistor inside the probe or attenuator body The input voltage limitation depends on the input amplifier capabilities and the signal duty factor The P6201 Probe is designed to withstand up to 50 V DC peak AC at low frequencies The 10X and 100X attenuators are designed to withstand up to 200 V DC peak AC at low frequencies Voltage in excess of this may damage the probe or attenuator In Section 1 is a Maximum Voltage Derating Curve Fig 1 4 for the P6201 Probe and attenuators The voltage must be reduced to offset the increased power dissipation if a signal with a duty factor of one is to be measured Pulse peak voltages in excess of the curve can be measured if the average power of the signal is estimated The following equation may be used to estimate the maximum input voltage for a periodic signal such as a pulsed waveform Voltage from the derating curve DC E ax V Duty Factor Components Pulse duration Pulse Period ti where duty factor Attenuators The P6201 Probe accessories include two attenuators The attenuators extend the input signal amplitude range of the probe in multiples of 10X and 100X when they are attached to the probe head To attach an attenuator to the probe head push on the desired attenuator over the probe tip Only one attenuator can be used at a time with the probe The attenuators are compensated to the
40. d termination e Connect the same 50 2 termination to the amplitude calibrator To this connect the P6201 Probe Tip to bnc Adapter Item 15 and the probe tip f Connect the P6201 output amplifier to the oscillo scope Make certain that the 50 2 TERM switch is set to INT 9 CHECK for a 5 division display 3 0 15 divi sions 5 Check AC DC and 50 2 Termination Switches a Center the waveform on the oscilloscope with both the P6201 and the oscilloscope coupling switches set to DC b Set the P6201 INPUT COUPLING switch to AC CHECK that the waveform position drops approxi mately 2 1 2 divisions Fig 5 4 Correct and incorrect examples of high frequency gain adjustment Fig 5 5 Correct and incorrect cross over phase adjustment d Set the P6201 INPUT COUPLING switch to DC e Adjust the amplitude calibrator or the oscilloscope VOLTS DIV VARIABLE if necessary to obtain a display that is exactly 5 divisions in amplitude f install a precision 50 0 termination Item 12 between the P6201 output amplifier and the oscilloscope input connector g Set the P6201 50 0 TERM switch to EXT h CHECK for 5 division display 2 0 1 sions i Remove the precision 50 0 termination and reset the 50 0 TERM switch to INT j Disconnect the generator termination adapter assem bly 6 Check OFFSET Range a Set the 7A13 VOLTS DIV to 5 V input coupling to GND and POSITION to posit
41. e offset housing and output connector box This will prevent acci dental destruction of the solid state devices on the circuit boards Probe Body Access to the circuit board inside the probe is accom plished by unscrewing the outer probe body while holding the inner probe body See Fig 4 1 The outer probe body should only be removed to adjust or troubleshoot the circuitry The cover protects the circuitry from dust and shields the amplifier from stray electromagnetic fields Output Amplifier The Output Amplifier housing cover consists of two housing halves with each half being held in place by two screws on each end Remove either housing half by removing the two screws in each end of the housing half then pulling the housing half straight out If the housing half wil not pull straight out easily loosen the rear panel center two screws Attenuators Remove the attenuator from the probe Access to the interior circuit board is now obtained by unscrewing the attenuator insulator inside the outer attenuator body Probe Tip Replacement Using a pair of pliers unscrew the damaged tip and screw the new tip in see Fig 4 1 Turn probe tip counterclock wise to remove Turn outer probe body clock wise as viewed from tip to remove A Probe Body and T ip Remove two screws each end and if need be loosen two center screws to remove housing half B Output Amplifier Turn attenuator tip counterclockwise as vie
42. es
43. es a locking type BNC connector which provides scale factor readout information to instruments having the readout capability The 10X and 100X attenu ator heads couple scale factor readout information to the instrument via the output connector Probe Handling The P6201 Probe has been designed to be as rugged as possible consistent with good high frequency response and miniature size However as with all precision devices the probe and cable should be handled carefully to avoid damage Special care should be taken that the cable is not crushed or pulled very hard The removable probe tip should also be treated with special care Use caution when in serting the probe tip into attenuators or other jacks to make sure that the tip is aligned with the receptacle Avoid drop ping the probe head Some of the most sensitive circuitry of the probe is in the probe body When not in use protect the probe tip from damage with the IC test tip adapter Spare probe tips are provided Power Source The probe power connector is designed to connect to the probe power receptacle on the 7000 Series indicator 475 and 485 Oscilloscopes or the 1101 Accessory Power Supply The probe requires 15 DC at approximately 105 mA and 15V DC at approximately 110 mA to operate See circuit diagram for pin identification Probe Connector and Controls The P6201 Probe contains an offset adjustment offset polarity input coupling and termination switches Fig 2
44. h the Input Coupling of the oscilloscope amplifier unit to GND position or disconnect the probe connector from the oscilloscope input Center the trace in the graticule area with the oscilloscope Position controls Reconnect the probe to the oscilloscope input and switch the Input Coupling to DC position Do not change the oscilloscope Position control setting but use the P6201 Probe Offset controls to center the signal on the CRT graticule area This assures that the observed signal is centered within the probe dynamic window NOTE Set DC OFFSET switch to OFF when using AC INPUT COUPLING Probe Connections to the Signal Source The input resistance of the probe is 100 k 2 with zero offset voltage The static input resistance decreases to approximately 90 when offset is adjusted for 0 V DC output with a DC voltage present at the input 11 1 uA volt of offset is drawn from the source by the probe Adding an attenuator to the probe reduces this offset loading so the input resistance remains near 1 megohm as DC offset is added The AC or dynamic loading of the probe is not affected by DC Offset however it does depend on frequency Figs 1 2 and 1 3 illustrate the shunt input resistance and capacitive loading of the probe and attenuators as a function of frequency Refer to these Measurement Concept booklet on Probe Measure ments Part Number 062 1120 00 is a recommended treatise 2 3 Operating Instruction
45. he AC Amplifier stage is coupled from the emitter of Q130 through R185 R190 and C300 to the base of Q300 Output Amplifier The Output Amplifier includes Q300 Q320 and 0350 Signals from the DC amp Low frequency Amplifier and the AC Amplifier are combined in this stage to form the output signal A forced cross over is achieved by means of feedback from the collector of Q320 through R350 to pin 3 of U200 R370 sets the high frequency gain of the Output Amplifier to match the gain of the DC amp Low frequency Amplifier C315 C325 and C358 are high frequency peaking and compensation adjustments R355 and RT360 form a gain vs temperature compensation network The parallel 50 Q strip line transformer at the output of O300 and Q320 increases the cutoff frequency of the output stage by inverting the output of Q300 thus adding to the output of Q320 in the cutoff frequency range only R398 provides the necessary 50 52 load when using the probe with other than 5092 systems such as 1 oscilloscope inputs The output amplifier must have the proper load impedance in order to maintain constant gain over the bandpass of the probe 3 1 Section 4 P6201 Probe MAINTENANCE Introduction This section of the manual contains maintenance infor mation for use in preventive and corrective maintenance Cover Removal CAUTION Disconnect the probe power before removing the probe head barrel the covers for th
46. high frequency signals to an oscilloscope input with minimum loading on the circuit under test Plug on attenuator heads provide higher input resistance reduced input capacitance and attenuation of the signal Effective DC offset range is also increased when using an attenuator head The P6201 15 designed primarily for use with TEKTRONIX 7000 Series 475 or 485 Oscilloscopes but may be used with 50 ohm sampling instruments and conventional oscilloscopes with 1 MQ input resistance The internal 50 ohm termination may be switched in or out to adapt the probe output to either 1 megohm or 50 ohm inputs The probe includes a locking type BNC connector which provides scale factor readout information to instruments having the readout capability The 10X and 100X attenuator heads also couple readout information to the instrument via the output connector The P6201 may be powered from the probe power output of the 7500 7700 and 7900 Series Mainframes the 475 and 485 Oscilloscopes or by the 1101 Accessory Power Supply ELECTRICAL CHARACTERISTICS Bandwidth DC to 900 MHz Risetime Probe Only 0 39 ns or less Probe Attenuation 1X within 396 10X within 496 with attenuator 100X within 496 with attenuator Input Impedance Probe Only 100 within 1 shunted by 3 0 pF within 10 See R X curves Attenuator Heads 1 within 1 shunted by 1 5 pF See X Curves Input Dynamic Range 1X 10X 10
47. iameter Probe Cable Length 72 0 inches 182 88 cm nominal Length 2 27 inches 5 77 cm Probe Power Cable 51 0 inches 129 54 cm nominal Weight Includes 24 5 ounces 694 58 grams Length including Lemo Connector Standard Accessories Amplifier Box Length including connector and Dimensions knob 4 485 inches 11 39 cm maximum Width 1 180 inches 3 0 cm Height 1 62 inches 4 11 cm ENVIRONMENTAL CHARACTERISTICS Probe Body Diameter 0 58 inch 1 47 cm Dimensions maximum outside diameter The probe wil operate within specifications over the following ranges Temperature 0 C to 50 C Altitude to Length 3 430 inches 8 71 cm 6 560 feet 2 000 m UN C THNef T 6 8 1 0 FREQUENCY IN GHz 4 FREQUENCY IN GHz Fig 1 1 P6201 Probe alone Input X and R as a function of frequency Fig 1 2 P6201 Probe with 10X or 100X attenuator Input X and as function of frequency 12 Characteristics P6201 Probe RREH EE aA J vocrace dd LLU POWER LIMITED PROBE 100X ATTEN VOLTAGE MAY GO TO DASHED LINE SEE OPERATING m x INSTRUCTIONS RT PROBE 10X ATTEN 1 111111 ru UT EE 25 6
48. ion the trace on the center graticule line b Connect the DMM Item 7 to the 7A13 Vc OUT Set the 7A13 COMPARISON VOLTAGE to and adjust for a DMM readout of 5 6 V c Remove the DMM and connect the P6201 tip to the Vc OUT connector d Set the 7A13 input coupling to DC e Set the P6201 DC OFFSET to and rotate the OFF SET VARIABLE ccw f CHECK that the trace is at least 1 7 divisions above graticule center g Rotate the OFFSET VARIABLE cw h CHECK that the trace moves down to graticule cen ter or lower Calibration P6201 Probe i Set the OFFSET VARIABLE ccw j Set both the 7A13 COMPARISON VOLTAGE and the P6201 DC OFFSET to CHECK the trace is at least 1 7 divisions below graticule center Rotate the OFFSET VARIABLE cw m CHECK that the trace moves up to graticule center or higher n Set the OFFSET VARIABLE ccw DC OFFSET to OFF and the 7A13 COMPARISON VOLTAGE to 0 V Re move the probe tip from the 7A13 7 Check Compression and Expansion The PG506 High Amplitude Square Wave Generator is capable of delivering enough signal amplitude to se riously damage the P6201 due to high frequencies that are contained in square waves Follow this proce dure carefully For more information refer to Fig 1 3 for voltage derating vs frequency curves a Set the square wave generator Item 4 amplitude to minimum and frequency to 10 kHz b Connect a bnc 5X attenuator
49. nce When the probe 15 connected to an instrument having a 50 ohm input impedance the 50 62 TERM switch is set to EXT internal 50 ohm termination disconnected from probe output circuit Attenuation 6 2V 62 V 200 V 5 6 V O O gt 62 V 7 Dynamic Range The dynamic signal range for the P6201 Probe and the probe with attenuators is illustrated in Fig 2 2 The dynamic range or maximum input signal capability for the probe alone properly terminated is and 0 6 V peak 1 2 V peak to peak This 0 6 V signal can be offset and 5 6 V so the maximum dynamic window with DC offset is and 6 2 V AC If signals with amplitudes greater than this are to be measured use the appropriate attenuator to reduce the signal voltage and DC offset down to the probe input limitation If the full dynamic range of the probe is used 600 mV a signal compression amount of up to 4 may occur However by reducing the input signal to 400 mV the signal compression drops to 1 or less Voltage limits Offset voltage range Signal amplitude limit within the offset and signal voltage range DC peak AC voltage range 1 Signal amplitude limit within the DC offset range 2 Offset range 3 Limits for the combined signal and offset Fig 2 2 Dynamic and offset limitations for the P6201 Probe and the probe with attenuators Maximum Voltage and Power Limitations
50. nix shall pay for the return of the product to Customer if the shipment is to a location within the country in which the Tektronix service center is located Customer shall be responsible for paying all shipping charges duties taxes and any other charges for products returned to any other locations This warranty shall not apply to any defect failure or damage caused by improper use or improper or inadequate maintenance and care Tektronix shall not be obligated to furnish service under this warranty a to repair damage resulting from attempts by personnel other than Tektronix representatives to install repair or service the product b to repair damage resulting from improper use or connection to incompatible equipment or c to service a product that has been modified or integrated with other products when the effect of such modification or integration increases the time or difficulty of servicing the product THIS WARRANTY IS GIVEN BY TEKTRONIX WITH RESPECT TO THIS PRODUCT IN LIEU OF ANY OTHER WARRANTIES EXPRESSED OR IMPLIED TEKTRONIX AND ITS VENDORS DISCLAIM ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE TEKTRONIX RESPONSIBILITY TO REPAIR OR REPLACE DEFECTIVE PRODUCTS IS THE SOLE AND EXCLUSIVE REMEDY PROVIDED TO THE CUSTOMER FOR BREACH OF THIS WARRANTY TEKTRONIX AND ITS VENDORS WILL NOT BE LIABLE FOR ANY INDIRECT SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES IRRESPECTIVE OF WHETHER TEKTRONIX OR THE VENDOR HAS
51. nnector Unscrew right hand thread the probe cable from the inner probe body and slip the outer probe body off the probe cable Remove the 4 40 hex cap screw from the output amplifier then slip the cable nipple holder input power cable nipple off of the input power cable and at the same time remove the probe cable and its attached ferrule holder from the output amplifier Slide cable nipple holder and input power cable nipple over input power cable to remove Remove 4 40 hex cap screw Fig 4 3 Probe cable replacement 4 3 Maintenance P6201 Probe Soldering Suggestions 1 Use a pencil type soldering iron with a power rating of 15 watts for circuit board component replacement and a 50 watt soldering iron for probe circuit board removal 2 Apply heat for minimum time to the junction between the component and the circuit board to melt the solder 3 Heat sink the lead of the component with a pair of long nose pliers 4 Use electronic grade 60 40 tin lead solder 5 After the new component has been installed clip off any excess lead extending beyond the circuit board and clean off any residual flux with a flux removing solvent 8 QUAS FOR 0320 Below serial number B079000 CUT THIS LEAD gt Be careful that the solvent does not remove any printing from the circuit board Transistor and Integrated Circuit Replacement Transistors and integrated circuits should n
52. number Change information if any is located at the rear of this manual List of Assemblies A list of assemblies can be found at the beginning of the electrical parts list The assemblies are listed in numerical order When the complete component number of a part is known this list will identify the assembly in which the part is located Cross Index Mfr Code Number to Manufacturer The Mfg Code Number to Manufacturer Cross Index for the electrical parts list is located immediately after this page The cross index provides codes names and addresses of manufacturers of components listed in the electrical parts list Abbreviations Abbreviations conform to American National Stan dard Y1 1 Example a component number A23R1234 A23 R1234 Assembly number 27 42 Circuit number Read Resistor 1234 of Assembly 23 Example b component number A23A2R1234 A23 A2 R1234 Circuit Assembly number S basseinbly number number Read Resistor 1234 of Subassembly 2 of Assembly 23 Component Number column 1 of the parts list The circuit components number appears on the diagrams and circuit board illustrations Each dia gram and circuit board illustration is clearly marked with the assembly number Assembly numbers are also marked on the mechanical exploded views located in the mechanical parts list The component number is obtained by adding the assembly number prefix to the circuit number The electrical parts list is
53. ot be re placed unless actually defective If removed during routine maintenance return them to their original sockets Un necessary replacement of transistors or IC s may affect the calibration of this instrument When transistors or IC s are replaced it will be necessary to completely recalibrate the P6201 Replacement transistors or IC s should be of the origi nal type or a direct replacement Fig 4 4 shows the lead configuration of the transistors and IC s used in this instru ment If a transistor is replaced by a transistor made by a different manufacturer than the original check the manufacturer s basing diagram for correct basing Q120 amp Q130 DOT Bor P 0300 amp 3207 CUT THIS LEAD 44 FOR Q300 N CLIPPED ANGLE 5 Serial numbers B079000 and Leads used as shown source and drain are reversed from vendor s designation The lettering on the top of the transistor serves as an orientation code for the respective emitter to be cut Fig 4 4 Lead configurations of the transistors and integrated circuits used in the P6201 Probe 4 4 Section 5 P6201 Probe CALIBRATION Complete calibration is given in this section The probe can be returned to original performance by completion of this procedure Limits tolerances and waveforms in this procedure are given as calibration guides and are not instrument specifications introduction To ensure accuracy the probe
54. s P6201 Probe graphs when probe loading is a concern When possible the probe should be connected to a low impedance point in the circuit to minimize this circuit loading Signal connections should be made directly to the tip of the probe or its attenuators Establish a good ground connection as directly as possible between the probe ground and the signal source ground Long ground leads can induce ground loops between the probe amplifier and the signal source generating considerable signal distortion Use one of the supplied clips or connectors to ground the probe to an outside terminal If the ground plane is adjacent to the signal source the ground electrical contact tip PN 131 1302 00 is suggested as a grounding method If the low frequency signal source has a coaxial connector a probe tip to test point jack adapter PN 103 0164 00 and a probe tip adapter PN 013 0084 01 for probe tip to BNC or 017 0076 00 for probe tip to GR connector may be used to connect the probe tip to the signal source If the high frequency signal is a 50 ohm source and has a coaxial connector then probe tip adapter PN 017 0094 00 for probe tip to GR connector may be used to connect the probe tip to the signal source This coaxial environment improves performance and reduces interface problems with the signal source It is good practice to always keep the ground lead as short as possible and to use a ground lead even for low frequency measurements 2
55. should be checked and recalibrated about every 1 000 hours of operation or every six months if used infrequently Table 5 1 TEST EQUIPMENT REQUIRED 1 Real Time Oscilloscope with Bandwidth dc to at least 100 MHz TEKTRONIX 7704A Oscilloscope with Differential Comparator Amplifier Minimum deflection factor 7A13 vertical and 7B80 horizontal 10 mV division or less Plug ins Input impedance 1 MQ 2 Sampling Test Oscilloscope Bandwidth dc to at least 1 GHz TEKTRONIX 7512 Time Domain Re Minimum deflection factor flectometer with S 1 or S 2 and S 53 1 mV division or less Sampling Heads used in conjunction Input impedance 50 ohms with the 7704A Oscilloscope 3 Fast Rise Generator Frequency 10 kHz Risetime 1 ns or less Frequency 10 kHz and 100 kHz Output amplitude adjustable to 1 2 V 9 Amplitude Calibrator Amplitude 250 mV into 50 ohms Waveform positive going square wave 6 Fast Rise Pulser Output amplitude 200 mV TEKTRONIX 284 Pulse Generator Risetime 70 ps Pulse width gt 1 us 4 Square Wave Generator TEKTRONIX PG 506 2 7 DMM 8 Probe Power Supply TEKTRONIX 1101A Accessory Power Supply not needed if a TEKTRONIX DM 501A DM 502A TEKTRONIX Oscilloscope equipped with Probe Power is used 9 GR to bnc female adapter Tektronix Part No 017 0063 00 2 required 10 P6201 Probe Tip to GR 50 9 Termination Adapter Tektronix Part No 017 0094 00 11
56. thin aliowable limits 1 Check and Adjust FET Bias Output Zero and Output Bias a Remove the screws holding the two housing halves onto the output amplifier and remove the two housing halves covers Refer to Section 4 Maintenance b Unscrew the outer probe body from the probe tip to gain access to the probe circuit board Refer to Section 4 c Connect the probe s power cable to the oscilloscope probe power connector or to the 1101A Accessory Power Supply Item 8 DC OFFSET C220 OFF e R230 INPUT COUPLING Q300 BIAS Low Frequency Circuit Board d Connect the DMM Item 7 leads between the source of Q100 Fig 5 1 and ground e ADJUST R150A Serial number B076840 through 8078999 adjust for 0 025 V to 0 050 V Serial number B076839 and below and number B079000 and above require no adjustment f Disconnect the DMM and connect the P6201 to the 1 M9 vertical input of a real time oscilloscope Item 1 Set the P6201 50 0 TERM to INT DC OFFSET polar ity to OFF and INPUT COUPLING to DC H F GAIN High Frequency Circuit Board Fig 5 1 Circuit board adjustment and test point locations 5 2 h Set the oscilloscope vertical input coupling switch to GND and VOLTS DIV for maximum sensitivity Set the os cilloscope time base for a free running trace Position the trace to graticule center i Set the oscilloscope input coupling switch to DC j ADJUST Output Zero R2
57. umbers and electrical values of the components are shown on the diagram Portions of the circuitry mounted on the circuit boards are within the outline for that board Circuit Board Illustrations of the electrical components in the P6201 Probe are mounted on the circuit boards illustrations of which are given at the rear of the manual Check Voltages NOTE The mounting screws and nuts holding the two circuit boards to the output amplifier box provide the ground return for the boards If the screws and nuts are loosened or removed a ground return for each circuit board to the output amplifier box must be provided Use a high resistance 20 000 ohms volt or higher meter for voltage measurements CORRECTIVE MAINTENANCE Replacement Parts Replacements for all electrical and mechanical parts used in the P6201 Probe can be obtained through your local TEKTRONIX Field Office or representative Some of the standard electronic components may be obtained more quickly by purchasing them locally Before ordering or purchasing any replacement parts refer to the Parts List in this manual for the required characteristics and correct description In addition to the standard electronic components many special parts and components are used in the P6201 Probe These parts are manufactured by or for Tektronix Inc and are selected to meet specific requirements Most of the mechanical parts used in the Probe are manufactured by Tektronix
58. vements Therefore when ordering parts it is important to include the following information in your order m Part number m Instrument type or model number m Instrument serial number m Instrument modification number if applicable If a part you order has been replaced with a different or improved part your local Tektronix service center or representative will contact you concerning any change in the part number Using the Replaceable Parts List The tabular information in the Replaceable Parts List is arranged for quick retrieval Understanding the structure and features of the list will help you find the all the information you need for ordering replacement parts Item Names In the Replaceable Parts List an Item Name is sepa rated from the description by a colon Because of space limitations an Item Name may sometimes appear as incomplete For further Item Name identifi cation U S Federal Cataloging Handbook H6 1 can be used where possible Indentation System This parts list is indented to show the relationship between items The following example is of the indentation system used in the Description column 1 2 3 4 5 Assembly and or Component Attaching parts for Assembly and or Component END ATTACHING PARTS Detail Part of Assembly and or Component Attaching parts for Detail Part END ATTACHING PARTS Parts of Detail Part Attaching parts for Parts of Detail Part END ATTACHING PARTS Name amp
59. wed from tip to remove Remove attenuator insulator by turning insulator counterclockwise Fig 4 1 Probe body output amplifier and attenuator interior access methods and probe tip replacement 4 1 Maintenance P6201 Probe PREVENTIVE MAINTENANCE Preventive maintenance consists of recalibration tf needed visual inspection from damaged components and cleaning The schedule for the preventive maintenance depends on the environment in which the probe 15 operated and the amount of use With average conditions laboratory situation a preventive maintenance program should be con ducted about every 1 000 hours of probe operation or every six months if the probe is used only occasionally Cleaning Normally the circuit boards in the interior of the probe output amplifier or attenuators will not require cleaning unless a cover has been left off for an extended period Use low pressure air to blow away accumulated dust then a cotton tipped applicator dampened with a solution of mild detergent soap and water may be used for additional cleaning After cleaning allow ample time for drying before applying power QT o us UTION Avoid the use of chemical cleaning agents which might damage the plastics used in this instrument Avoid chemicals which contain benzene toluene xylene acetone or similar solvents Visual Inspection After cleaning circuit boards should be carefully checked for such defects as
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