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Tektronix 1L20 Instruction Manual
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Tektronix 1L20 Instruction Manual

Tektronix 1L20 Instruction Manual

Spectrum analyzer
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INSTRUCTION
0
I V
I A
I N
J
L
J
A
. I —
Serial Numher
TYPE
1120
SPECTRUM ANALYZER
,
Tektronix
Inc.
S.W. M illik a n W a y •
P. O. Box 500 •
Beaverton, O regon
9 700 5
•
Phone 644-0161
•
Cables: T ektronix
0 7 0 -0 5 1 9 -0 0
366

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Summary of Contents for Tektronix 1L20

  • Page 1 INSTRUCTION . I — Serial Numher TYPE 1120 SPECTRUM ANALYZER Tektronix Inc. S.W. M illik a n W a y • P. O. Box 500 • Beaverton, O regon 9 700 5 • Phone 644-0161 • Cables: T ektronix 0 7 0 -0 5 1 9 -0 0...
  • Page 2 W A RR A NTY All Tektronix instruments are warranted against defective materials and workman­ ship for one year. Tektronix transformers, manufactured in our own plant, are war­ ranted for the life of the instrument. Any questions with respect to the w ar­...
  • Page 3 CONTENTS Section 1 Characteristics Section 2 Operating Instructions Section 3 Circuit Description Section 4 Maintenance Section 5 Performance Check Section 6 Calibration Parts Ordering Information Abbreviations and Symbols Electrical Parts List Section 7 Mechanical Parts List Information Mechanical Parts List Section 8 Section 9 Diagrams...
  • Page 4 Fig. 1-1. Type 1L20 Spectrum Analyzer. Type 1L20...
  • Page 5 SECTION 1 CHARACTERISTICS from the oscilloscope. The Type 1L20 can also be used in The Type 1L20 Spectrum Analyzer described in this manual is designed for use in Tektronix oscilloscopes for the panor­ an external Plug-In Unit Power Supply such at the Tektronix...
  • Page 6 Characteristics— Type 1L20 C haracteristic Performance Requirement S upplem ental In fo rm a tio n Resolution Range 1 kHz to 100 kHz; uncalibrated Can be cross-coupled with DISPER­ SION control or switched separately IF CENTER FREQ Range Coarse Control...

  • Page 7: Operating Instructions

    4200 MHz to the appropriate RF INPUT connector and Controls and Connectors switch the RF INPUT switch to the appropriate position A front panel view of the Type 1L20 Spectrum Analyzer (BAND 1 -10-275 MHz; BANDS 2-5— 275-4200 MHz). If the is shown in Fig.
  • Page 8 (away from tin g . The two parts will be recoupled again wherever the front-panel) turning the RESOLUTION switch. they are set to the same setting. Fig. 2-1. Fuhction of Type 1L20 front-panel controls and connectors. 2 - 2...
  • Page 9 Reflections caused by mismatches between the signal source one oscilloscope to another, the front-panel IF CENTER FREQ and the Type 1L20 RF INPUT sometimes cause “ dips” in the CAL and DISP CAL adjustments must be recalibrated to com­ signal display on the CRT. When good conversion flatness pensate for differences in sawtooth amplitude and CRT sensi­...
  • Page 10 If not, the observed signal is an image frequency Square Law and the RF CENTER FREQ dial must be set 400 MHz (twice the IF of the Type 1L20) above its present reading to observe The output of this circuit is approximately proportional the true signal.
  • Page 11 Operating Instructions— Type 1L20 If the signal did not move when the RF CENTER FREQ control was changed, you are watching an IF feedthrough signal. MIXER PEAKING Control Operation The front-panel MIXER PEAKING control has been pro­ vided to improve the over-all sensitivity of the Spectrum Analyzer on Bands 2-5.
  • Page 12 Sweep Latch Up On some Type 1L20 Spectrum Analyzers, the frequency sweep might latch up occasionally, as indicated by a sudden Fig. 2-5. Phase-Lock display showing large and small beat signals.
  • Page 13 Operating Instructions— Type 1L20 Usually, the resolution of the Spectrum Analyzer w ill be control is changed. This will be especially evident when using .2 M Hz/CM .5M H z/C M setting. Since near optimum at a given setting of the DISPERSION con­...
  • Page 14 SION switch is set to a lower position.) 2. Set the sweep rate of the oscilloscope and the RESOLU­ TION control of the Type 1L20 for the best defined signal peaks. Fig. 2-8 . Spectrum for a square RF pulse.
  • Page 15 Operating Instructions— Type 1L20 The equivalent pulse width of the modulation signal screen is equivalent to one pulse. (It might be helpful if the can now be determined by measuring the frequency width RESOLUTION control is uncoupled and reset for better resolu­...
  • Page 16 NOTES...
  • Page 17 LOCK CHECK switch is held in while the Local Oscillator is being tuned by the RF CENTER FREQ control, beat fre­ Figure 3-1 is a block diagram of the Type 1L20 Spectrum quencies w ill apear on the CRT as the LO frequency appro­...
  • Page 18 (*> ®...
  • Page 19 Circuit Description— Type 1L20 thus correcting for any tendency o f the LO to drift in stage common emitter IF amplifier tuned for a wide-band frequency. The DC level of the corrective signal can be set response centered around 200 MHz.
  • Page 20 Circuit Description— Type 1L20 proper mixing action in the Wide-Band Mixer Amplifier Q140. This has been accomplished by the feedback loop through D361, Q280, and Q290. The amplitude of the swept-fre- quency signal is detected by D361. This voltage amplitude is compared to the fixed DC voltage at the IF Center Freq Range control R290.
  • Page 21 Circuit Description— Type 1L20 lightly loaded, the frequency response of the circuit w ill be much broader than the response of the crystal alone, giving a wide bandpass (low resolution) display. When the RESOLU­ TION control SW550 is turned counterclockwise (toward...
  • Page 22 Circuit Description— Type 1L20 In the LIN position of the switch, the R606-R607 voltage divider attenuates the input signal by approximately 3 to 1 so that a signal giving a full-screen display in LIN position will continue to give a full-screen display when the switch is moved to one of the other positions.
  • Page 23 The necessary materials and instructions for proper Type 1L20. The early part of the section deals with general lubrication of Tektronix instruments are contained in a com­ maintenance. This is followed by general information on ponent lubrication kit which may be ordered from Tektronix.
  • Page 24 Wiring Color-Code TABLE 4-1 All insulated wire used in the Type 1L20 is color-coded C om ponent N um bering according to the EIA standard color-code to facilitate cir­ cuit tracing. The widest color stripe identifies the first color C om ponent of the code.
  • Page 25 Maintenance— Type 1L20 Removing and Remounting the IF Chassis Removing the Phase-Lock Assembly 1. Loosen the front set-screw on the DISPERSION RANGE 1. Turn off the power. switch shaft with a .05 inch Allen wrench and slide the shaft 2. Unplug all the leads connected to the phase-lock out through the front panel.
  • Page 26 M aintenance— Type 1L20 4. Remount the phase-lock assembly on the main chassis. in Step 4, and the cables. See Fig. 4-3 and Table 4-3 for Guide the handle of the INT 1 MHz REF FREQ switch into the correct hook-up.
  • Page 27 Part Number 251-0514-00. nections fo r the d iffe re n t transistor and socket The step-by-step technique is as follows: com binations used in the Type 1L20. If a defective transistor is being replaced, the new transistor 1.
  • Page 28 Maintenance— Type 1L20 Check Associated Equipment. Before proceeding with unit if one is available. If faulty operation is still noted with troubleshooting of the Analyzer, check that the equipment a different plug-in unit, the trouble can be assumed to be in used with it is operating correctly.
  • Page 29 Maintenance— Type 1L20 Check Instrumentation Calibration. Check the calibra­ scope within X 1 0 probe. Accuracy of the voltmeter should tion of the instrument, or the affected circuit if the trouble be within 3% on all ranges. Be sure that the test probes are exists in one circuit.
  • Page 30 Check Individual Components. The following procedures NOTE describe methods of checking individual components in the The shielded chassis of the Type 1L20 make it very Type 1L20. difficult to reach much of the socket wiring for waveform and voltage checking. In many cases, it is easier to take these measurements from the top Transistors.
  • Page 31 Maintenance— Type 1L20 Resistors. Resistors can be checked with an ohmmeter. Capacitors. Leaky or shorted capacitors can best be detected Normally, resistors do not need to be replaced unless the by checking resistance with an ohmmeter on the highest measured value varies widely from the specified value.
  • Page 32 Maintenance— Type 1L20 Fig. 4^6. Phase Lock and Recorder Detector Circuit Boards. 4 -1 0 ®...
  • Page 33 SECTION 5 PERFORMANCE CHECK 8. Small Screwdriver, 3 / 32 inch blade, Tektronix Part No. Introduction 003-0192-00. This Performance Check Procedure is offered to provide 9. Flexible Cable Plug-In Extension, Tektronix Part No. a systematic method of checking the performance o f the 012-0038-00.
  • Page 34 Performance Check— Type 1L20 IF ATTEN ALL OFF b. Insert the Spectrum Analyzer into the oscilloscope, fasten the securing latch, and turn on the power. Allow IF CENTER FREQ Midrange (000) 10-20 minutes for warm-up. FINE IF CENTER FREQ Midrange c.
  • Page 35 Position the trace to the bottom line of the graticule. IF ATTEN ALL OFF IF CENTER FREQ Midrange (000) FINE IF CENTER FREQ Midrange DISPERSION RANGE M Hz/CM DISPERSION- COUPLED RESOLUTION VERTICAL DISPLAY PHASE LOCK I NT 1 MHz REF FREQ Check the Band 1 frequency calibration every 10 MHz by applying the appropriate —70 dBm signals from the UHF Signal Generator to the BAND 1 RF INPUT connector.
  • Page 36 Performance Check— Type 1120 Position the trace to the display is exactly 6 centimeters high. The generator Atten­ bottom line of the uator control should read —69 dBm ± 0.1 dBm. graticule e. Switch the 1 dB IF ATTEN switch to OFF. IF ATTEN ALL OFF f.
  • Page 37 Midrange (000) IF CENTER FREQ Display Flatness Check M H z/C M DISPERSION RANGE Preset the Spectrum Analyzer controls as follows: DISPERSION- Position the trace to the COUPLED RESOLUTION bottom line of the O ff (Down) VIDEO FILTER graticule VERTICAL DISPLAY IF CENTER FREQ Midrange (000) RF INPUT...
  • Page 38 Performance Check— Type 1L20 TABLE 5-3 M o d u la tio n CRT D isplay in Maximum Error Notes DISPERSION/CM Signal D ivisio n s/M a rke r 10 MHz .1 [xS (10 MHz) ± At IF CENTER FREQ con­...
  • Page 39 Performance Check— Type 1L20 g. Adjust the G AIN control of the Analyzer for 6 centi­ G A IN Full clockwise meters of signal deflection. VERTICAL DISPLAY VIDEO h. Add 26 dB of IF ATTEN. (Set the 20 dB; 4 dB, and 2 dB c.
  • Page 40 Performance Check— Type 1L20 Turn the INT 1 MHz REF FREQ to OFF. The display g. Set the oscilloscope sweep rate to 20 ms/cm. must not show more than 0.8 centimeters of frequency modu­ display must not show more than 1 minor division of frequ­...
  • Page 41 (Tektronix Part No. 012-0031-00) able but not absolutely necessary); timing accuracy, ± and a BNC to binding post adapter (Tektronix Part No. 103- 0.001 %. Recommended equipment— Tektronix Type 184 Time- 0033-00) may also be used.
  • Page 42 Calibration— Type 1L20 (4B) (4 0 (4D) (4E) Fig. 6-1 . Recommended equipment for calibrating the Type 1L20.
  • Page 43 Calibration — Type 1L20 (13) (14) (15) Fig. 6-2 . Recommended Calibration tools and equipment. 6 -3...
  • Page 44 Calibration— Type 1L20 Apply 1 volt p-p 5 MHz signal to EXT FREQ IN and Type 1L20, Serial N o --------------------------------- adjust R831 (Avalanche Volts adjust) midway between Calibration Date_________________________ avalanche and free-run. (Minimum jitter.) Calibrator_____ _____ ______ --------------- Check for voltage swing from <...
  • Page 45 Calibration— Type 1L20 □ 16. Check IF Attenuator Accuracy.......Page 6-18. nal can feed through the mixer and appear on the CRT without mixing with the Local Oscillator, Check each IF ATTEN switch for zbO.l dB/dB accur­ since it is already at the center frequency of the acy.
  • Page 46 Calibration— Type 1L20 Fig. 6 -3 . Setup for adjusting Dispersion accuracy (Step 2 1 . IF CENTER FREQ CAL 2. Adjust Dispersion Accuracy Centered (Screwdriver Adjustment) a. Connect the equipment as shown in Fig. 6-3. DISPERSION RANGE M H z/C M...
  • Page 47 Calibration— Type 1L20 First Ninth c. Depress the MARKER SELECTOR switches for lOdlS (100 MHz) and .1 juS (10 MHz). d. Adjust the Spectrum Analyzer G A IN control for a dis­ play about 5 centimeters in amplitude. e. Adjust C358 (see Fig. 6-4) for 1 marker/centimeter over the middle eight centimeters of the display.
  • Page 48 Calibration— Type 1L20 Fig. 6-6 . Setup for adjusting Resolution (Step 4 ) . Fully Clockwise 3. Check Dispersion Linearity RESOLUTION O ff (Down) VIDEO FILTER a. Set up the equipment as directed in Steps 2a through VERTICAL DISPLAY BANDS 2-5 RF INPUT b.
  • Page 49 Calibration— Type 1L20 Fig. 6 -1 0 . Typical spectrum display for adjusting R543 (Step 4 ) . j. There is considerable interaction between the above steps, so return the RESOLUTION control to the clockwise Fig. 6-8 . Typical test oscilloscope display for adjusting C504 and position and repeat Steps e through j until the displays are C508 (Step 4 ) .
  • Page 50 Calibration— Type 1L20 Fig. 6 -1 2 . Setup for adjusting Swept Frequency Oscillator Center Frequency (Step 5 ) and checking range of IF CENTER FREQ Controls (Step 6 ) . f. Change the DISPERSION RANGE to kHz/CM. Adjust Center Frequency of Swept Frequency Oscillator g.
  • Page 51 Calibration— Type 1L20 c. Adjust the G A IN control so that the 10 MHz markers are visible. d. The second harmonic o f the 100 MHz signal should be centered on the graticule; if it is off-center, readjust R253 and R204 as directed in Step 5.
  • Page 52 Calibration— Type 1L20 Fig. 6 -1 4 . Setup for checking RF CENTER FREQ Calibration and Phase Lock (Step 8 ) . check for phase-lock zero beats about every 1 MHz. Check Check RF CENTER FREQ Calibration and for a phase-locked display a t 10 MHz, 100 MHz, and 270 Phase Lock Display MHz.
  • Page 53 Calibration— Type 1L20 Fig. 6 -1 5 . Setup for adjusting IF Amplifier Response (Step 9 ) . Adjust Narrow-Band IF Amplifier Peaking O a. Connect the equipment as shown in Fig. 6-15. b. Preset the front panel controls of the Analyzer as...
  • Page 54 Calibration— Type 1L20 Fig. 6 -1 7 . Setup for adjusting Wide-Band Amplifier (Step 10) and checking the Low Pass and Band Pass Filters (Step 1 1 ). h. Disconnect the sweep generator signal and apply a 10. Adjust Wide-Band Am plifier Circuit —40 dBm 74 MHz signal in its place.
  • Page 55 Calibration— Type 1L20 NOTE If steps c and d in d ica te th a t the Lowpass or Band­ pass Filters need readjustm ent, the A n a ly z e r should be returned to T ektronix fo r checking, since c a lib ra ­...
  • Page 56 Calibration— Type 1L20 BANDS Spectrum 2 -5 Analyzer RF INPUT Fig. 6 -2 0 . Setup for Steps 13 through 16. g. Check the setting of the RF Atten dial of the generator. 13. Check Sensitivity and RF Frequency Range It should read —90 dBm or less.
  • Page 57 Calibration— Type 1L20 Fig. 6 -2 1 . Typical display for Sensitivity check (Step 1 3 ). Fig. 6 -2 2 . Location of Log Cal Adjustment R666 (Step 1 4 ). When the 100 kHz RESOLUTION display meets the sensitivity requirements given in Table 6-2, the 1 kHz RESOLU­...
  • Page 58 Calibration— Type 1L20 Apply a —50 dBm 350 MHz signal from the signal DISPERSION- COUPLED RESOLUTION generator to the BANDS 2r5 RF INPUT connector and change the RF INPUTS switch to BANDS 2-5. VIDEO FILTER O ff (Down) Set the RF CENTER FREQ dial to 350 MHz.
  • Page 59 Calibration— Type 1L20 TEST OSCILLOSCOPE Fig. 6 -2 3 . Setup for checking TO RECORDER Output (Step 1 7 ). c. Switch on the VIDEO FILTER and check for an attenu­ 17. Check TO RECORDER Output ated display resembling a sawtooth (see Fig. 6-24).
  • Page 60 Calibration— Type 1L20 Fig. 6 -2 5 . Setup for checking VIDEO INPUT. d. Monitor the signal amplitude with a DC coupled test 19. Check Frequency Response of VIDEO INPUT oscilloscope for constant amplitude, and decrease the output Circuit frequency of the generator.
  • Page 61 Calibration— Type 1L20 Fig. 6 -2 6 . Setup for checking Incidental Frequency Modulation. h. Move the IF feedthrough signal off the screen with the 20. Check Incidental Frequency Modulation IF CENTER FREQ control and center the tunable signal on the CRT with the RF CENTER FREQ control.
  • Page 62 The procedures w hich fo llo w are NOT p a rt o f the to the Band 1 (front) oscillator. routine c a lib ra tio n o f the Type 1L20, and should b. Set the tape to read exactly 635.
  • Page 63 2 (rear) Local Oscilator (see Fig. 6-27). 13. Set the frequency meter to indicate 375.5 MHz. Tune 4. Set the Type 1L20 FINE FREQ control for + 7 .0 volts at the oscillator to 375.5 MHz. The dial tape must read between the varactor bias terminal.
  • Page 64 1 (front) Local Oscillator (see Fig. 6-27). hole (see Fig. 6-30); be sure power is OFF before inserting the screwdriver. 4. Set the Type 1L20 FINE FREQ control for 7.0 volts at the varactor bias terminals. 14. If the tape reads above 270, more inductance is needed;...
  • Page 65 ABBREVIATIONS A N D SYMBOLS lambda— wavelength amperes A or amp less than AC or ac alternating current < low frequency audio frequency length or long alpha— common-base current amplification factor low voltage amplitude modulation approximately equal to mega or 106 milli or 1 0'3 beta—...
  • Page 66 If a part you have ordered has been replaced with a new or improved part, your local Tektronix, Inc. Field Office or representative w ill contact you concerning any change in part number.
  • Page 67 SECTION 7 ELECTRICAL PARTS LIST Values are fixed unless marked Variable. Tektronix Ckt. No._____________Part No.______________________Description________________________________________ S /N Range Capacitors Tolerance ± 2 0 % unless otherwise indicated. 283-0067-00 0.0001 fiF 200 V Cl 4 281-0105-00 0.8-8.5 pF Cl 6 281-0105-00 0.8-8.5 pF...
  • Page 68 Electrical Parts List— Type 1L20 Capacitors ( C o n t ) Tektronix Ckt. N o. Part No. Description S /N Range Cl 39 283-0039-00 0.001 ju F 500 V 283-0103-00 Cl 40 180 pF 500 V Cl 43 281 -0635-00...
  • Page 69 Electrical Parts List— Type 1L20 Capacitors ( C o n f ) Tektronix Ckt. No. Part No.______________________Description________________________________________ S /N Range 283-0039-00 0.001 ( 500 V C413 C416 283-0001-00 0.005 [xF 500 V 281-0599-00 1 pF ± 0 .2 5 pF...
  • Page 70 Electrical Parts List— Type 1L20 Capacitors ( C o n t ) Tektronix Ckt. N o. Part No. Description S /N Range C656 283-0001 -00 0.005 [xF 500 V C658 283-0083-00 0.0047 /x.F 500 V 281-0629-00 C660 33 pF 600 V...
  • Page 71 Electrical Parts List— Type 1L20 Diodes (C o n f) Tektronix Ckt. No._____________Part No.______________________Description________________________________________ S /N Range 152-0188-00 Germanium 1N64 D603 152-0188-00 Germanium 1N64 D604 152-0186-00 Germanium I N I 98 D657 Germanium I N I 98 152-0186-00 D660 152-0186-00...
  • Page 72 Electrical Parts List— Type 1L20 Connectors ( C o n f ) Tektronix Description Ckt. N o. Part N o. S /N Range J379 131-0372-00 Coaxial 131-0372-00 Coaxial J401 131-0372-00 Coaxial J470 131-0372-00 Coaxial J501 136-0094-00 Socket w /hardw are...
  • Page 73 Electrical Parts List— Type 1L20 Inductors (Con't) Tektronix Ckt. No._____________Part No.______________________ Description S /N Range L3142 L320 *108-0215-00 1 .1 /xH 276-0507-00 Core, Ferramic Suppressor L325 L333 *108-0215-00 1.1 /xH *108-0215-00 1.1 fiH L343 L348 *108-0304-00 45 nH *108-0372-00 27 nH...
  • Page 74 Electrical Parts List— Type 1L20 Transistors ( C o n f ) Tektronix Ckt. N o. Part No. Description 151-0173-00 Silicon 2N3478 Q340 Silicon 2N3478 Q350 151-0173-00 151-0181-00 Silicon 40242 (RCA) Q420 151-0181-00 Silicon 40242 (RCA) Q430 151-0175-00 Silicon 2N3662...
  • Page 75 Electrical Parts List— Type 1L20 Resistors ( C o n t ) Tektronix Ckt. No. Part No.______________________Description________________________________________ S /N Range 315-0620-00 R158 62 0 R159 315-0241-00 240 0 ' A W R160 315-0620-00 62 0 ' A W R163 315-0680-00...
  • Page 76 Electrical Parts List— Type 1L20 Resistors ( C o n t ) Tektronix Ckt. No. Part No. Description S /N Range R252 311-0310-00 5 kO R253 311-0329-00 50 kO R254 Prec 323-0440-00 374 kO y4 w R255 316-0101-00 100 O...
  • Page 77 Electrical Parts List— Type 1L20 Resistors ( C o n t ) Tektronix Part No. Description Ckt. No. S /N Range R414 315-0512-00 5.1 kO y4 w R416 y4 w 315-0102-00 R426 315-0102-00 1 kO y4 w R436 315-0102-00 1 kO...
  • Page 78 Electrical Parts List— Type 1L20 Resistors ( C o n t ) Tektronix Ckt. N o. Part No. Description S /N Range R654 316-0471 -00 47012 y4 w R656 316-0332-00 3.3 k!2 y4 w R657 316-0332-00 3.3 k!2 68012 R658...
  • Page 79 Electrical Parts List— Type 1L20 Resistors ( C o n f ) T e ktro n ix Ckt. No._____________Part N o.______________________Description S /N Range Prec R864 321-0402-00 150 kO y . w R865 321-0277-00 7.5 k!2 Prec y . w...
  • Page 80 Electrical Parts List— Type 1L20 Transformers (Confj Tektronix Ckt. N o. Part No. Description S /N Range *120-0340-00 Toroid, 5 turns b ifila r T330 *120-0340-00 Toroid, 5 turns b ifilar T331 *120-0340-00 Toroid, 5 turns b ifilar T343 *120-0340-00...
  • Page 81 Mounting hardware must be purchased separately, unless otherwise specified. PARTS ORDERING INFORMATION Replacement parts are available from or through your local Tektronix, Inc. Field Office or representative. 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 improvements developed in our engineering department.
  • Page 82 Mechanical Parts List — Type 1L20 INDEX OF MECHANICAL PARTS LIST ILLUSTRATIONS FIG. 1 FRONT FIG. 2 REAR & CHASSIS FIG. 3 IF CHASSIS FIG. 4 LOW PASS FILTER & PHASE LOCK ASSEMBLY FIG. 5 ACCESSORIES...
  • Page 83 SECTION 8 MECHANICAL PARTS LIST FIG. 1 FRONT Fig. & T ektronix Index S e ria l/M o d e l N o. Description Part N o. E ff Disc 1 2 3 4 5________________________________ 333-0924-00 PANEL, front 366-0153-00 KNOB, charcoal— POS knob includes: 213-0004-00 SCREW, set, 6-32 x 3 / u inch, HSS...
  • Page 84 Mechanical Parts List — Type 1L20 FIG. 1 FRONT ( C o n t ) Fig. & Index T ektronix S e ria l/M o d e l Description Disc Part N o. 1 2 3 4 5 1-14 331-0168-00 DIAL, w /o brake—...
  • Page 85 Mechanical Parts List — Type 1L20 FIG. 1 FRONT ( C o n f ) Fig. & Index T ektronix S e ria l/M o d e l N o. Description Disc N o. Part No. 1 2 3 4 5...
  • Page 86 Mechanical Parts List — Type 1L20 FIG. 1 FRONT ( C o n t ) Fig. & Index S e ria l/M o d e l N o. Part N o. Description Disc T ektronix 1 2 3 4 5...
  • Page 87 Mechanical Parts List — Type 1L20 FIG. 2 REAR & CHASSIS Fig. & Index Tektronix S e ria l/M o d e l N o. Description Part No. Disc 1 2 3 4 5 386-1025-00 PLATE, rear 131-0017-00 CONNECTOR, 16 contact, male...
  • Page 88 Mechanical Parts List — Type 1L20 FIG. 2 REAR & CHASSIS ( C o n f ) Fig. & Index T e ktro nix S e ria l/M o d e l N o. Description Part N o._________ Eff_____________ Disc______ y...
  • Page 89 Mechanical Parts List — Type 1L20 FIG. 2 REAR & CHASSIS (Co Fig. & Index T ektronix S e ria l/M o d e l N o. D escription N o. Part N o. Disc 1 2 3 4 5...
  • Page 90 Mechanical Paris List — Type 1L20 FIG. 3 IF CHASSIS ig. & ndex Tektronix S e ria l/M o d e l Description Part N o. Disc 1 2 3 4 5 610-0175-00 ASSEMBLY, IF CHASSIS assembly includes: 610-0173-00 ASSEMBLY, IF ATTENUATOR...
  • Page 91 Mechanical Parts List — Type 1L20 FIG. 3 IF CHASSIS ( C o n t ) Fig. & Index T ektronix S e ria l/M o d e l No. Description N o. Part N o. E ff Disc 1 2 3 4 5...
  • Page 92 Mechanical Parts List — Type 1L20 FIG. 4 LOW PASS FILTER & PHASE LOCK ASSEMBLY & Fig. Index S e ria l/M o d e l No. T ektronix Description Part N o. Disc 1 2 3 4 5 644-0014-00...
  • Page 93 Mechanical Parts List — Type 1L20 FIG. 4 LOW PASS FILTER & PHASE LOCK ASSEMBLY (Cont) Fig. & Index T ektron ix S e ria l/M o d e l N o. Description N o. Part N o._________ E ff...
  • Page 95 O U T TO 150 - 1 3 0 M H z B M JD P N S S F IL T E R < S > LOCK CHECK S W IT C H < t > < ® 1165 T Y P E IU2LO SPECTRUM...
  • Page 96 <7> VARIABLE RESOLUTION CIRCUITS IS ) OUTPUT A M P L IFIE R £ 11 6 5 T Y P E I L Z O / I L 3 0 S P E C T R U M . A N A L Y Z E R S Y S T E M B L O C K D I A G R A M...
  • Page 97 < $> N0I133S 3H...
  • Page 98 £ U €>S TYPE- IL/LO SPECTRUM ANALYZER P H A S E L O C K C IR C U IT <2,...
  • Page 99 □ oo ' > i 1ST AMPLIFIER < 2.HD AMPLIFIER MIXER > ' T 5 M H z W I5 Q IF SIG.NAL TO J151 < > SW EPT -FR EQ . Vvtuu WEOO S IG N A L FROM 03fo3 <$>...
  • Page 101 AT TE W S W 1 5 9 5 W lfe 9 S W IT 4 | - ------1 & 1 - --- I - ------ [ “ ]-------1 ---- 1 I F S IG N A L w . s o W 3 0 0 0 4 0 \ <$>...
  • Page 102 N B I F A M P L 70 MHz OSC < (6 >...
  • Page 103 — I ■ z o 1166 VARIABLE RESOLUTION TYPE. I L Z 0 / I L 3 0 S P E C T R U M AN A LY ZE R CIRC UITS <T>...
  • Page 104 5 M H z A M P L IF IE R - D E T E C T O R S TYPE. I L Z O / I L 3 0 S P E C T R U M A N A LY ZE R O U TPU T AMPLIFIER <^>...
  • Page 105 TYPE 1L20 SPECTRUM ANALYZER...
  • Page 106 FIG. 2 REAR & CHASSIS TYPE 1L20 SPECTRUM ANALYZER...
  • Page 107 FIG. 3 IF CHASSIS TYPE 1 L20 SPECTRUM ANALYZER...
  • Page 108 FIG. 4 LOW PASS FILTER & PHASE LOCK ASSEMBLY...
  • Page 109 FIG. 5 STANDARD ACCESSORIES Fig. & Index Tektronix S e ria l/M o d e l No. Description N o. Part N o. Disc 1 2 3 4 5 PLUG, red 134-0052-00 CORD, patch, BNC to banana, red, 012-0091-00 134-0076-00...
  • Page 110 OPTIONAL ACCESSORIES TYPE 1L20 SPECTRUM ANALYZER...
  • Page 111 MANUAL CHANGE INFORMATION A t T ektronix, we c o n tin u a lly strive to keep up w ith latest electronic developm ents by add ing circuit and com ponent improvements to our instruments as soon as they are developed and tested. Sometimes, due to p rin tin g shipping...
  • Page 112 TYPE 1L20 TYPE 1L30 PARTS LIST CORRECTION CHANGE TO: 0 181-00 /3 6 6...
  • Page 113 TYPE 1I20/1L30 PARTS LIST CORRECTION CHANGE TO: 114-0208-00 90-150 uH 1 /8 R260 321-0423-00 249 kft R26l 321-0423-00 249 kft 1/8 W 0510-00 1/4 W 51 f t R373 315-0510-00 1/4 W R376 51 « 0101-00 1/4 W ML0979/466...
  • Page 114 T y p e 1 L 2 0 S p e c t r u m A n a l y z e r P a g e T E X T C O R R E C T I O N S e c t i o n C h a r a c t e r i s t i c s P a g e...
  • Page 115 T y p e 1 L 2 0 S p e c t r u m A n a l y z e r P a g e P i­ p a g e 5 - 8 . A d d t h e f o l l o w i n g s t e p :...
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