manualshive.com logo in svg

Tektronix 7L12, Instruction Manual

Share
Download
Tektronix 7L12 Instruction Manual Download Page 41

Summary of Contents for 7L12

Page 1: ...A yL J 6 Serial Number _ _ _ _ _ _ _ L C Tektronix lnc I T P O Box 500 Beaverton Oregon 97005 J Phone 644 0161 Cables Tektronix 070 1298 01 772 ...

Page 2: ... follows 1 Typed text pages are typically scanned in black and white at 300 dpi 2 Photo pages are typicallyscanned in gray scale mode at 600 dpi 3 Schematic diagram pages are typically scanned in black and white at 600 dpi unless the original manual had colored high lighting as is the case for some 70 s vintage Tektronix manuals If you purchased this manual from us typically through our Ebay name ...

Page 3: ......

Page 4: ...ion Using a Vertical Amplifier Plug In Unit as the Source Using the Cal O u t Signal Reference for Accurate Frequency and Applicatior s Applications SECTION 3 Performance Check Preliminary Preparation Check 10 dB DIV and L I N Mode Calibrations Check the Frequency Readout Accuracy Check Gain Selector Accuracy and Variable Range Check Operation o f the Video Filter Check Sensitivity Check For Spuri...

Page 5: ... SPAN Marker 50 MHz Calibrator Adjust the Calibrator Output Resolution Adjust Bandpass of the 105 MHz lF Amplifier and 300 kHz Filter Adjust the ResolutionGain Leveling Compensation PreliminaryAdjustment of the Gain Slope For the ResolutionAmplifier Adjust the Post ResolutionAmplifier Gain Minimize Intermodulation Products SECTION 5 Circuit Description Block Diagram Description Detailed Circuit De...

Page 6: ... Removing and Installing Freq Span Resolution Knobs Replacing or Repairing the Cam Switches Replacing the Major Circuit Board Assemblies Replacing the 2nd L O Varactor Assembly Replacing the 2 095 GHz Filter Assembly Replacing the 1st YIG Oscillator Assembly Replacing the 2nd Mixer Assembly Includes Calibration Procedure after Replacement Replacing the Phase Detector and 2nd N O Hybrid Assembly Re...

Page 7: ...Fig 1 1 7L12 Spectrum Analyzer ...

Page 8: ...of section 9 lrouble shooting procedures plus general infor mation that may aid in servicing the instruments are also provided Section 7 Electrical Parts List Provides information necessary to order replaceable parts and assemblies Section 8 Diagrams Provides functional block diagram and detailed circuit schematics Pictoral layout drawings which show assembly sub assembly and component loca tions ...

Page 9: ... to 10 dB DIV and less than Ihird order is down 70 dB or more from two 30 dBm 0 5 division from 2 dB DIV to LIN Note This deviation is signals within any frequency span Second order is down a function of the oscilloscope vertical linearity 70 dB or more from two 4 0 dBm signals Calibrator Spurious Signals From Internal Sources 50 MHz 50 01 with an absolute amplitude level of Residual Response 30 d...

Page 10: ...ely 15 Hz to 1 MHz Sensitivities for the trig gered modes are 1 G0 5 division for the P PAUTO mode 2 G0 3 division for the NORM mode 3 G1 5 division for the SINGLE SWEEP mode Sweep automatically recurs at the end of sweep holdoff time in the FREE RUN mode Vertical Output Connector Provides 50 mV 5 video signal per displayed division about the CRT vertical center Source impedance is approximately 1...

Page 11: ...with the functions of the by the SLOPE and LEVEL controls The minimum signal controls and selectors and the overall operation of the an plitude for triggering must equal or exceed 0 3 division 7L12 on the display The LEVEL control selects the signal amplitude level Triggering does not occur when the setting C A U T I O N of the LEVEL control is beyond the sigt al aml litude level A safety latch in...

Page 12: ... top of the 1 cable t o 10 dB DIV mode graticule with reference t o the V A R I A B L E Gain control settings of the RF attenuator and Gain selector In 10 dB Div Gain selector must be i n blue RF attenuator seletor and read sector for readings t o be appli out Switches i n 10 dB steps cable w M A X INPUT readout changes t o 1 L correspond with attenuator set 7 IO r RF lnput connector lnput im ting...

Page 13: ...e increased t o 100 X when TIMEIDIV selector is in SPEC TRUM POSITION Push t o un lock1 Adjusts the ratio of brightness between the clipped baseline and the remaining display Compensates for differences of oscilloscope deflection sensitiv ities Controls the amplitude above the baseline of the clipped subdued portion Position control U s e d when FREQ SPAN I00 kHzlDiv t o switch phase lock on or of...

Page 14: ...ion The amplitude and polarity of this signal is relative to the graticule vertical centerline Source impedance is about 1 kfl The signal can be used to drive an external recorder Display Controls and Selectors BASELINE CLIPPER Controls the vertical amplitude of that portion baseline plus signal of the display that is decreased or subdued in intensity CONTRAST Adjusts the brightness ratio between ...

Page 15: ...is also displayed on CRT s of oscilloscopes with readout feature NOTE A blue tint borders the lOdB DIV display switch and four positions of the Gain selector This is to correlate REFERENCE LEVEL readout to Gain switch settings that are applicable in the 10 dB DI V display mode Readings outside the blue sector are erroneous because the gain is electrically locked out The CRT readout will display th...

Page 16: ... or into the right two compartments of a three plug in A treatise on spectrum analyzer measurements and applications is contained in TEKTRONlX Measurements Concept Booklet Spac trurn Analyzer Measurement Theory and Practice Part No 062 1334 00 7000 Series Oscilloscope Ensure that the 7L12 is securely latched in the compartment so it cannot fall out if the oscilloscope is tipped forward b Connect t...

Page 17: ...IN CAL PHASE LOCK ON Detent GAIN Fully CCW RESOLUTION 3 MHz VARIABLE Pushed I n are coupled together 30 dBm FREQ SPANIDIV 50 MHz CAL OUT Connected to RF IN Connector V I D E O PROCESSOR Switch Out F Fig 2 2 7L12 Spectrum Analyzer in a 7000 Series Oscilloscope illustrating initial settings of front panel controls and selectors Circled 0 pushbuttons denote button depressed or position of selector ...

Page 18: ...ule represents 30 dBm Baselineof the display must be on the bottom graticule line Fig 2 4 Calibrating the LOG and REFERENCE LEVEL of the dis play Double exposure to illustrate the two displays with reference to each other graticule divisions Amplitude change should equal 5 divisions at 2 dB1DIV f If the change is more than 5 divisions e g amplitude decreases from 8 to 2 5 div adjust LOG CAL to fur...

Page 19: ...e bottom graticule line and the 50 MHz signal is centered then adjust the VARIABLE Gain control for a signal amplitude of 6 3 divisions a With the BASELINE CLIPPER set midrange adjust the CONTRAST for the desired ratio between the clipped or subdued portion and the rest of the display Usually the contrast is adjusted so the clipped baseline portion is just visible b Adjust the BASELINE CLIPPER con...

Page 20: ...er levels are often rated in dBm dB with reference to 1 mW regardless of impedance Sensitivity and power levels for 75 fisystems is usually rated in dBmV dB with reference to 1 mV across 75 a Fig 2 6 is a circuit diagram of a suit able matching pad for this purpose The conversion from Fig 2 6 Circuit of a 75 a to 50 a matching pad AC coupled 2 10 dBmV to dBm and dBm 75 R to dBm 50 a through matchi...

Page 21: ... SPAN control To adequately resolve pulsed spectrum information the resolution bandwidth of the analyzer should be on the order of 1 10 the side lobe frequency width or the reciprocal of the pulse width The RESOLUTION selector is usually set after the sweep rate has been adjusted for optimum main lobe detail 3 Gain Desensitization Near 0 Hz If the Gain selector is set for a REFERENCE LEVEL that is...

Page 22: ...ng signal now be used to examine or analyze such characteristics a s modulation pattern pulsed repetition rates etc These three triggering modes are provided 6 Triggering the Display P P AUTO which triggers the display through the peak to peak amplitude range of the signal If the triggering The sweep trigger is switched the signal is absent the sweep isautomatically recycled to FREE RUN mode for s...

Page 23: ...Vertical Amplifier Position control to procedures describe how the analyzer can be swept from manually sweep the 7L12 Spectrum Analyzer these sources 2 Sweeping the Analyzer with a Signal Applied to the Input of the Vertical Amplifier Plug In Unit a Sweeping the Analyzer from an External Voltage that a Calibrate the sweep span of the analyzer in the is applied to the HOR IZ IN jack SPECTRUM positi...

Page 24: ...al to Obtain an Absolute Frequency Measurement 1 Tune the signal to the center graticule line ap proaching this point from the low frequency side of the display Couple the FREQ SPANID IV and RESOLUTION 2 14 selectors together and open up the display to obtain an accurate setting by reducing the FREQ SPANIDIV to 5 MHz and increasing RESOLUTION to 3 MHz Adjust SWP CAL if necessary to calibrate the d...

Page 25: ...eration is 30 dBm with 0 dB RF attenuation or 30dBm with 60 dB of RF attenuation Signals above this level can only be measured if an external attenuator is used Accurate Signal Level Difference Measurements in dB 1 Using the 2 dB D IV display mode position the top of the lowest amplitude signal to a reference line within the graticule area with the VARIABLE Gain or VER T Position controls If displ...

Page 26: ...e top of the signal to the top graticule line with the VERT POS control to establish a reference lncrease the RF attenuator settings in 10 dB steps noting that the signal amplitude decreases 1 k0 1 division between each step It may be easier to observe the change if the VIDEO FILIER is switched in If the VIDEO FILTER is used decrease the sweep speed with the VAR lAB hE TimeIDiv control until the s...

Page 27: ... position Check for a signal amplitude increase of 10 dB k1 0 dB 5 div k0 5 div h lncrease the RF attenuator to 50 dB and reposition the top of the signal to the 5th graticule line Check the accuracy of the next 10 dB step of the Gain selector i lncrease the RF attenuator setting to 60 dB switch the VlDEO FILTER ON and decrease sweep speed with the VARIABLE control to improve the signal symmetry C...

Page 28: ... with the VARIABLE Gain control I A Display without filter 2 Signal amplitude should equal or exceed 2X the noise amplitude S N 2N See Fig 3 2A d Remove the 50 MHz Calibrator signal to the RF INput Return the VARIABLE Gain control to its CAL detent and switch the RF attenuator to 0 dB Adjust Gain selector if necessary so the REFERENCE LEVEL reads 70 dBm e Switch the display mode to 2 dB DIV VIDEO ...

Page 29: ...qual or exceed 90 dBm noise level below the 3rd graticule line from the top I Decrease the FREQ SPANIDIV to 10 kHz and the RESOLUTION bandwidth to 30 kHz Note that the average noise level must be below the 4th graticule line or 100 dBm m Decrease the RESOLUTION bandwidth to 3 kHz Check that the sensitivity equals or exceeds 108 dBm Average noise level is 4 8 or more divisions below the top referen...

Page 30: ...he signal at the 6 dB down point 3 divisions at 2 dB DIV see Fig 3 4A Bandwidth must equal 3 MHz k600 kHz 3 0 k0 6 divisions with a frequency span of 1 MHz D IV e Switch the display mode to 10 dB1DIV and check the display shape factor Fig 3 4B Return the display mode to 2 dB1DIV f Decrease the FREQ SPANIDIV to IMHz and the RESOLUTION bandwidth to 3 MHz Keep the marker signal centered on screen wit...

Page 31: ... amplitude sweep triggering operation sweep TimeIDiv accuracy and external sweep operation It does not include any internal 1 Return the FREQ SpAN DIV to MAX SPAN position adjustment or checks If the instrument fails to meet a and the RESOLUTION bandwidth to 3 MHz specified performance requirement the adjustment procedure for the related circuits will be found under a similar title in the Calibrat...

Page 32: ... 5 V Div Type or Model Recommended TEKTRONIX 7603 7904 with 7A12 or 7A18 vertical amplifier plug in 7503N can be used if a substitute for the 7014 Counter is used Time Mark Generator Marker outputs 1 s to 1 p s TEKl HONlX 2901 with Harmonic Modulator Part No 067 0640 00 Used to Accuracy 0 00 1 check TIMEIDIV and FREQ SPANIDIV accuracies Pulse Generator Digital Counter Signal Generators Pulse perio...

Page 33: ...ncy check Accuracy 50 MHz k0 01 through termination and connect the probe through the termination to the CAL OUT connector on the 7L12 The frequency of the calibrator may be checked by an b Switch the Vector Voltmeter frequency to 50 MHz accurate frequency counter such as TEKTRONIX 7D14 Digital counter plug ln unit with a readout 7000 Series scilloscopeand a 50 MHz vertical plug in unit to amplify...

Page 34: ... by the user or manufacturer to more rigid specifications then the 7L7 2 RF attenuator must be used a Set the front panel controls and selectors as follows RF Attenuator 0 dB Gain CCW Display Mode LOG 2 dB1DIV FREQ SPANIDIV 1 MHz RESOLUTION 3 MHz Center Frequency 200 MHz b Apply a 60 dBm 200 MHz signal from the VHF signal generator to the RF INput Adjust the Gain selector and VARIABLE Gain control...

Page 35: ...isplay mode to 10 dB DIV b Apply two signals separated approximately 2 MHz from the output of two 50 signal sources through 10X attenuators for isolation then through a BNC r connector to the RF lNput of the 7L12 Fig 3 7 illustrates this setup I A Third 3rd order intermodulation products I I B Second 2nd order intermodulation products cross modulation I e Tune the FREQUENCY towards 10 MHz until th...

Page 36: ...sary to adjust the output of the pulse generator to approximately 0 1 V however do not exceed 1 V peak f Depress the VIDEO PROCESSOR pushbutton Note the intensity of the pulsed spectra should increase Return the pushbutton to its off position g Switch PHASE LOCKED mode OFF and tune the 0 Hz response to the left edge of the screen Decrease the FREQ SPANIDIV to 0 and the TIMEIDIV setting to the 10 p...

Page 37: ...gered display f Decrease the signal generator output or the VoltsIDiv setting of the vertical amplifier unit to check the sweep triggering sensitivity The sweep must trigger when the signal amplitude is equal to or less than 0 3 division I he TRIGGER LEVEL control may require readjusting g lncrease the generator frequency to approximately 1 MHz and switch the 7L12 TIMEIDIV to 1 ps h Check The swee...

Page 38: ...o 5 Variable in Call Display Mode to Ch2 and Trig Source to Ch 1 c Tune the 7L12 FREQUENCY towards 0000 until the 0 Hz response is centered on the graticule Switch the TIMEIDIV selector to AMPLIFIER position then adjust the Ch 1 Position control of the vertical amplifier to center the spot at the peak of the 0 Hz response This should be at the same location as the 0 Hz response was in the SPECTRUM...

Page 39: ...l Switch the 7L12 TIME DIV selector to the SPECTRUM position and ensure that the VARIABLE TimeIDiv control is pushed into its CAL detent c Switch the 7L12 Trigger MODE to NORM and the Trigger SOURCE to INT Adjust the 1 HIGGER LEVEL control for a triggered display d Check the accuracy of the I IMEIDIV selections by applying appropriate markers from the time mark gener ator and noting the displaceme...

Page 40: ...d instrument are subjected to a program which evaluates and updates circuits These modifications may require changes in the calibration procedure History information that is applicable to earlier instruments is included either as a deviation within the step s or as a subpart to this step lnteraction Adjustments that interact are noted and reference made to the affected adjustments Equipment Requir...

Page 41: ... the oscilloscope compart ment Remove the holding screw for the rackmounted center section and pull the section out to its latch position Fig 4 11 The slide rails that support the center section have a positive detent when hey are half open A slight pull is required to override this detent DO NOT JERK the section because it may slam against the end stops and bind To replace the center section turn...

Page 42: ...ntrol is off center loosen the Allen set screws and reposition the control h Change the VoltsIDiv vertical amplifier unit to 20 mV and adjust the amplifier Variable VoltsIDiv control for a display amplitude of 1 5 division j Disconnect the Oscilloscope Calibrator signal to the lnput of the vertial amplifier Turn the 7L12 SLOPE control off center to either the or side Check that the READY indicator...

Page 43: ...otating it fully CCW At least 5 markersshould be displayed within the 10 division display with the control fully CCW Return the VARIABLE control to CAL detent h Check the timing accuracy of the remaining TIME1 DIV steps Accuracy should be within 2 over the center 8 divisions of the display Fig 4 2 Triggering and time base adjustmentsand test point i Switch the TIMEIDIV selector to the SPECTRUM pos...

Page 44: ...t adjustment if the baseline shifts 4 Adjust the Gain Compensation and Reference Level a Switch the display mode to 2 dB DIV and position the baseline of the display on the bottom graticule line if necessary b Apply a 10 MHz 10 dBm signal from a calibrated signal source through appropriate adapters BNCfemale to SEALECTRO female SEALECTRO male to male adapter and SEALECTRO female to harmonica conne...

Page 45: ...ig 4 31so the trace is at the reference level or top of the graticule p Decrease the signal level to 40 dBm If necessary position the trace on the bottom graticule line with the VERT POS control q lncrease the Gain selector setting 20dB for a REFERENCE LEVEL readout of 100 dBm r Adjust the 60 dB Gain R663 Fig 4 3 so the trace is at the reference level s Remove the signal from the input to the Func...

Page 46: ... If the amplitude is below 4 V P P it may be due to low output from either the 1st LO or the sampling driver for the reference oscillator g Change the probe to TP1370 Fig 4 4 Replace the connector PI341 of W69 on its respective pins and change the vertical amplifier VoltsIDiv to 10 mV Fig 4 4 Phase lock adjustments and TP 8 h Slowly tune the FREQUENCY one direction then the other noting which dire...

Page 47: ...plifier Unit b Adjust Temp Comp R1778 Fig 4 7 for 13 V DC a t pin 7 of P1315 supply to the 2nd LO c Change the probe from pin 7 of PI315 to TP1754 Fig 4 71 d Preset R1701 R1702 sweep shaper board and R1637 R1598 Fig 4 7 fully CCW Preset R1703 through R1711 on the sweep shaper board fully CW e Apply 10 ns markers modulated by 1ps and 10ps trigger signals in the Harmonic Modulator to the RF INput f ...

Page 48: ... find the optimum setting because of the interaction A t this time it is also a good idea to check the response of the 2 095 MHz filter and mixer assembly to see if they require adjustment Thiscan be done as follows 1 Switch the FREO SPAN DIV to 2 MHz RE SOLUTION to 30 kHz and the Display Mode 2 dB DI V 2 Apply only 10ns markers to the Input and tune one of the markers to the center of the screen ...

Page 49: ...nsure that this portion is linear and calibrated to 100 kHz1Div f Check that the center FlNE control shifts the center frequency 0 1 MHz and 0 1 MHz g Replace the jumper connector PI311 Disconnect and remove the 10X probe and the marker generator signals to the RF INput of the 7L12 Voltage Memory Circuit Preliminary Set the following front panel controls as indicated FREQ SPANIDIV RESOL U TION TIM...

Page 50: ...affect the bandpass of the two assemblies the orientation can be adjusted without changing the coupling if you are careful A 105 MHz detector and a narrowband high gain differential amplifier plug in unit are required as additional test equipment to adjust the coupling These adjustments are only required if either of the two assemblieshave been replaced and are not part of the routine calibration ...

Page 51: ...oximately 1000 MHz Re apply 10 ns markers through the Harmonic Modulator to the RF INput T i Adjust the Freq Span Cal R1416 Fig 4 12 for 1 marker1Div 11 Calibrate MAX SPAN Marker a Switch the FREQ SPANIDIV to MAX position Remove the time marker sisnals to the 7L12 RF lNput so v i 4 12 ocationof the adjustments for frequency span and the 0 Hz response is easily recognized Tune the center marker not...

Page 52: ...level 2 If necessary adjust the 7L12 calibrator output as described in method 1 c Accurate 30 dBm Signal Source Signal substitution method NOTE The power meters that were recommended for the preceeding method can be used to verity the signal source output level 1 Set the FREQ SPANIDIV to 5 MHz and the RESOLUTION to 3 MHz Switch the RF attenuator to 10 dB and the Gain selector fully CCW Push the 2 ...

Page 53: ...resonators to shape the display and the output resonator to keep the response centered 3 Adjust C456 Fig 4 75 for maximum bandwidth and amplitude Bandpass a t the 6 dB down point should equal 3 MHz lo however the specification is within 20 of the resolution bandwidth selected The response flatness can vary a s much as 2 dB Fig 4 16 illustrates this variation with dashed lines The shape should rese...

Page 54: ...y of the signal generator Bandpass a t the 6 dB down point should equal 500 kHz to 600 kHz g Reconnect the plugs for cables W307 and W356 to their respective pins and replace the jumper plug for relay K357 h Switch the RESOLUTION to 30 kHz FREQ SPAN DIV a t 100 kHz Ensure that the signal is still centered on screen and if necessary tune to center with the FINE FREQUENCY controls then switch the RE...

Page 55: ... for maximum amplitude a t 3 kHz and 30 kHz resolution TABLE 4 1 e Change the FREQ SPANIDIV to 1 MHz RESOLU TlON to 3 MHz RF Attenuator to 0 dB and Gain selector fully CCW Position the baseline of the display on the bottom graticule line then adjust the Gain selector and VARIABLE Gain control for a signal reference level of 7 divisions c Switch the RESOLUTION between 30 kHz a t 10 kHz1Div and 3 kH...

Page 56: ...nput to resolutionpre amplifier see Fig 4 20A c Switch the Display Mode to 2 dB DIV and adjust the signal generator output so the low frequency side of the display left edge crosses a reference graticule line 3 divisions from the top d Adjust the High End Slope R417 High End Break Point R411 and the Low End Slope R416 Fig 4 20B for a gradual slope to the display as illustrated in Fig 4 21 NOTE Thi...

Page 57: ...ENCY to the center of the two signals and adjust the output of the generators so the amplitude of both signals is a t least full screen or until sidebands can be observed on the display d Adjust IM Adj C95 Fig 4 22 to minimize the amplitude of the sidebands e Remove the signal generator hookup to the 7L12 RF INput d j u s t for minimum 3rd order inter modulation products C1Zt A T I v i Fig 4 22 Lo...

Page 58: ...re above 2 1 GHz are down at least 70 dB Signals within the 1 8 GHz span are converted to 2 095 GHz IF when they are mixed in a balanced mixer with the swept frequency from the 1st LO The 1st LO local oscillator is tuned and swept over any portion of the frequency range from 2 095 GHz to 3 9 GHz Below frequency spans of 100 kHz1Div the 1st LO is not swept in frequency but is normally phase locked ...

Page 59: ...lly locked in phase to some multiple of a 2 21 MHz reference oscillator The circuits that stabilize the 1st LO for these narrow frequency spans maintain incidental FM at less than 200 Hz P P This permits effective use of resolution bandwidths a s narrow as 300 Hz Phase lock is automatic unless the front panel PHASE LOCK switch is in its OFF position When automatic phase lock is enabled the current...

Page 60: ...sembly tunes the resonant frequency of the chamber Its function and effect on the oscillator are described later The 2 2 GHz low pass filter 2 095 GHz bandpass filter and 2nd mixer assembly are tuned so the bandwidth is approximately 15 MHz Bandpass and center frequency are tuned by series capacitors C15 C16 C17 and the coupling of the mixer The coupling will also affect the mixer efficiency and s...

Page 61: ...in variation being provided in the function IF The resolution section contains three crystal filters for 300 Hz to 30 kHz resolution and a 300 kHz coupled resonator filter The 300 kHz filter consists of six resonant sections and an amplifier Signal path through or around the filters is directed and controlled by relays K300 K357 K353 K356 K354 and K355 These relays are energized as the RESOLUTION ...

Page 62: ...gate for the sweep generator is generated by U1140 The positive gate output is directly coupled to the gate input of the sweep generator A t the same time a negative gate from pin 15 of U1140 is amplified and inverted by 01156 and applied as an unblanking gate to the mainframe CRT During the time the gate is not running pins 15 and 9 gate and lamp drive are high This output is applied through the ...

Page 63: ...il of the YIG oscillator to U1370 U1370 almplifies this error voltage and sets a voltage at one of the inputs to a comparator U15406 The I 5 V is applied through diode CR1560 to the base of 01561 to turn this transistor off and through R1555 to the input of a single shot multivibra tor U1558 Before phase lock mode is set Q1561 conducts the current from the summing transistors that are in series wi...

Page 64: ...unction IF Amplifier The function IF consists of six cascode amplifier cells or blocks in cascade Each cell operates as a linear or logarithmic amplifier to provide the gain characteristics required for the three display modes of the 7L12 The gain of each cell is a function of the emitter resistance of the input transistor In the Log mode a s the signal level increases diodes in the emitter circui...

Page 65: ...2 or 3 of P830 low or closing the front panel 30 kHz switch S90C on turns one section of U840 on to connect C840 in the feedback loop Pin 2 of P830 is pulled low when the front panel RESOLUTION selector is switched to the 30 kHz position and pin 3 of P830 is pulled low when the RESOLUTION is switched to 3 kHz or 300 Hz position The three sections of U830 and one section of U840 are connected to op...

Page 66: ...y level that is set by the Baseline Clipper control Range of the control provides about 50 display clipping The contrast is set by setting the quiescent current or bias of CR898 This determines the degree of contrast between the clipped portion and the unclipped display 50 MHz Calibrator The calibrator is a crystal controlled oscillator The oscillator is a multivibrator with the crystal Y950 in se...

Page 67: ...ned dirt or grease may be removed with a cotton tipped applicator dampened with a solution of mild detergent in water Abrasive cleaners should not be used If the circuit board assemblies need cleaning remove the circuit board by referring to the instructions under Corrective Maintenance in this section After cleaning allow the interior to thoroughly dry before applying power to the instrument Do n...

Page 68: ...cuit Electrode Configura diagram section Refer to h e Electrical Part List Section tion Lead identification for the transistors MOS FET s for a description of all assemblies and components and IC s are shown in Fig 6 3 and 6 4 NOTE Corrections and modifications to the manual and instrument are described on inserts bound into the rear of the manual Check this section for changes and corrections to ...

Page 69: ...djustments of the affected circuit if applicable Before changing the setting of any adjustment note its position so it can be returned to its original setting This will facilitate recalibration after the trouble has been located and repaired 5 Semiconductor failures account for the majority of electronic equipment failures Most semiconductor devices transistors and IC s are socket mounted therefor...

Page 70: ...r Slave Flip Flop U1560 SWP TERMlNATlON 6CURRENT p RETURN GND v J CC SAWTOOTH OUT SN 7400 156 0030 00 Four Input NAND Gate U1110 GND r SUPPRESSOR INPUT MO 18 155 0042 02 Miller Runup and Delay Pickoff U1160 INVERTING INPUT g C OUTPUT NON INVERTING INPUT RAD 2911 156 0132 00 Wide Band Op Amp U1350 U1410 Fig 6 3A IC pin identification ...

Page 71: ...ng measurements across the diode and comparing most easily checked by direct replacement When substitu these with voltages listed on the diagram Forward to back tion is impossible check input and output signal states a s resistance ratios can usually be taken by referring to the described in the circuit description and on the diagram schematic and pulling appropriate transistors and pin Lead confi...

Page 72: ...Plastic Cased Transistors Emitter ector B C E Metal Cased Transistors Power Transistors Integrated Circuits MOS is in its MOS Fig 6 4 Electrode configuration for socket mounted transistors MOSSand IC s ...

Page 73: ... straighten the leads on the back side of the board clip the old component free then when the solder melts gently pull tI ie soldered lead through the hole A desoldering tool should be used to remove the old solder Replacing the Square Pin for the Multi pin Con nectors It is important not to damage or disturb the ferrule when removing the old stub of a broken pin The ferrule is swaged into the cir...

Page 74: ...e Mechanical Parts section 2 Turn the RESOLUTION knob clockwise until the last 3M position marker is centered in the resolution readout window then lift the RESOLUTION knob away from the panel for clearance without removing the RESOLUTION knob skirt Tighten the RESOLUTION knob set screws 4 Unlock the RESOLUTION from the FREQ SPAN selector by pulling out the PULL TO UNLOCK sleeve Rotate each select...

Page 75: ...sary e Replace the VARIABLE potentiometer switch as sembly as follows 1 Removetwo 2 2 56 screws and lockwashers from the mounting plate located a t the rear of the actuator assembly 2 Pull the potentiometer switch assembly including the coupler and shaft clear of the actuator assembly 3 Replacing the Cam Actuator and Potentiometer Switch Assemblies To re assemble these assemblies reverse the above...

Page 76: ...ead to the 105 MHz IF assembly and unplug the external cabling to the board Unscrew and remove the 8 mounting posts that hold the board to the chassis Lift the circuit board assembly off of its chassis REPLACING ASSEMBLIES 5 1 Loosen Set Screw 1 3 2 Back Varactor assembly out of chamber with coupling adjustment 1 7 3 Lift assembly out with tweezers I I r Fig 6 8 Removingthe Varactor assembly screw...

Page 77: ...ixer out of its cavity 2 Loosen and remove screws for low pass filter 3 Loosen connector for W 7 t o Traveling Wave Damper assembly 4 Remwe 2 095 GHz Filter mounting screws and slide assembly out of the unit D o not bend W 7 5 Replace the assembly b y reversing the procedure 6 Calibrate as per description under Replacing the 2nd Mixer Fig 6 9 Replacingthe 2 095 GHz Filter assembly Replacing the 1s...

Page 78: ...at to approximately 110 MHz This filter prevents the output of the 2nd LO 2 2 GHz from developing some DC output level from the crystal detector This DC may drive a DC coupled signal to the vertical amplifier out of the graticule display window If the vertical amplifier is a 7A22 with an adjustable low frequency cutoff of approximately 0 1 Hz no filter is required The 2nd mixer orientation rotatio...

Page 79: ...plifier Switch the oscilloscope Vertical Mode to Right or chop so the amplifier output can be observed Switch the input coupling of the amplifier to DC If the amplifier 1 Crystal detector has selectable bandwidth set the HF point to 1 kHz and the LF point to I Hz NOTE If the amplifier does not have selectable bandwidth use a LP filter between the 705MHz output and the detector If the bandpass filt...

Page 80: ...tor and 2nd LO Hybrid 7 Unplug the harmonica connectors of the cables to the Assernbly reference level readout board Loosen both P22 and P72 then remove W22 8 Disconnect the harmonica to the gain selector switch Loosen and remove the remaining plugs to the hybrid and the display assembly 9 Loosen and disconnect PI P5 then swing the cable Loosen the two mounting screws that go through the W4 the 3 ...

Page 81: ...ld the hybrid Replacement procedure is the reverse of the removal assembly to the siderail then lift the assembly outandto proceduredescribed above When the knobs are the side NOTE Do not unsolder the leadsto the hybrid ensure that they are indexed correctly by rotating the assembly selectors through their range Remember all knobs where positioned fully clockwise prior to removal Torque the 18 Pul...

Page 82: ...MBLY 2 095 GHz MIXER UNIT s i n g l e balanced HYBRID CIRCUIT ASSEMBLY OSCILLATOR ASSEMBLY 2 4 GHz TUNED CAVITY 2 nd LO VARACTOR ASSEMBLY I F MODULE ASSEMBLY 105 MHz 105 MHz I F C i r c u i t Board Assembly SHELL tuned c a v i t y 2 t u n i n g screws cap VIDEO FILTER PROCESSOR C i r c u i t Board Assembly VIDEO FIL I ER PROCESSOR C i r c u i t Board Assembly A l O l 670 1751 00 TRIG SOURCE SWITCH...

Page 83: ... pF Cer 50 V 0 01 pF Cer 150 V 80 20 0 01 yF Cer 150 V 80 20 0 1 pF Cer 50 V 0 1 pF Cer 50 V 0 1 pF Cer 50 V 0 1 uF Cer 50 V 0 01 pF Cer 150 V 80 20 29 pF Cer 500 V 0 1 yF Cer 50 V 0 0 1 pF Cer 150 V 80 20 0 01 uF Cer 150 V 80 20 0 1 pF Cer 50 V 0 01 SF Cer 150 V 80 20 0 01 pF Cer 150 V 80 20 0 1 pF Cer 50 V 0 01 pF Cer 150 V 80 20 39 pF Cer 500 V 0 01 pF Cer 150 V 80 20 0 01 L F Cer 150 V 80 20 0...

Page 84: ...F Cer 150 V 80 20 0 0 1 pF Cer 150 V go 20 0 01 uF Cer 150 V 80 20 0 01 pE Cer 150 V 80 20 0 01 pF Cer 150 V I 80 20 0 01 pF Cer 150 V 80 20 0 01 pk Cer 150 V 80 20 0 0 1 pF Cer 150 V 1 40 20 0 01 pF Cer 150 V 480 20 0 01 pF Cer 150 V 4430 20 0 01 pF Cer 150 V 480 20 0 01 pF Cer 150 V 440 20 0 01 pF Cer 150 V 1 80 20 0 01 pF Cer 150 V 80 20 0 0 1 pF Cer 150 V 80 20 0 01 pF Cer 150 V 80 20 0 01 pF ...

Page 85: ...Cer 500 V 10 0 022 pF Cer 50 V 20 0 022 vF Cer 50 V 20 0 1 pF Cer 100 V 10 0 022 VF Cer 50 V 20 0 1 pF Cer 100 V 10 2 1 pF Cer 500 V 1 0 1 pF Cer 100 V 10 100 pF Cer 350 V 20 0 022 pF Cer 50 V 20 0 1 pF Cer 100 V 10 0 022 pF C e r 50 V 20 0 1 pF Cer 100 V 10 21 pF Cer 500 V 1 0 1 pF Cer 100 V 10 100 pF C e r 350 V 20 0 022 pF Cer 50 V 20X 0 1 pF Cer 100 V 10 0 022 pF Cer 50 V 20 0 1 pF C e r 100 V...

Page 86: ... V 20 0 022 UF Cer 50 V 20 0 1 uF Cer 100 V 10 14 pF Cer 500 V 5 11 pF Cer 500 V 5 1 pF Cer 25 V c80 20 22 pF Cer 500 V 10 1 uF Cer 25 V 80 20 1 WE Cer 25 V 80 20 0 022 pF Cer 50 V 20 0 001 pF Cer 500 V loo 0 1 ILF Cer 25 V 80 20 0 1 uF Cer 100 V 10 120 pF Cer 500 V 10 10 pF Cer 500 V 10 180 pF Mica 100 V 1 56 pF Mica 100 V 1 98 pF Mica 500 V 5 1 pF Cer 25 V 80 20 1 4E Cer 25 V 80 20 10 pE Cer 500...

Page 87: ...LF Cer 150 V 80 20 105 pF Cer 500 V 1 105 pF Cer 500 V 1 0 56 pF Cer 100 V 20 0 56 pF Cer 100 V 20 0 56 uF Cer 100 V 20 105 pF Cer 500 V 1 47 pF Cer 500 V 20 3 pF PIN 50 V 5 22 pF P l a s t i c 100 V 10 2 pF P l a s t i c 100 V 5 0 1 pF Cer 50 V 0 1 pF Cer 50 V 100 pF E l e c t 20 V 20 82 pF Cer 500 V 10 0 001 pF Cer 500 V loo 0 22 pF Elect 15 V 20 6 8 pF Elect 35 V 20 100 pF Cer 200 V 5 510 pF El...

Page 88: ... l i c o n r e p l a c e a b l e by A1108 matched quad S i l i c o n PIN 100 V 25 R a t 100 mA S i l i c o n r e p l a c e a b l e by IN4152 S i l i c o n r e p l a c e a b l e by IN4152 S i l i c o n r e p l a c e a b l e by IN4152 S i l i c o n r e p l a c e a b l e by IN4152 S i l i c o n PIN 100 V 25 R a t 100 m A S i l i c o n PIN 100 V 25 R a t 100 mA S i l i c o n PIN 100 V 25 Q a t 100 m A...

Page 89: ...N4152 S i l i c o n r e p l a c e a b l e by IN4152 S i l i c o n r e p l a c e a b l e by IN4152 S i l i c o n r e p l a c e a b l e by IN4152 S i l i c o n r e p l a c e a b l e by IN4152 S i l i c o n r e p l a c e a b l e by IN4152 S i l i c o n r e p l a c e a b l e by IN4152 S i l i c o n r e p l a c e a b l e by A1108 S i l i c o n r e p l a c e a b l e by A1108 S i l i c o n r e p l a c e ...

Page 90: ...152 Zener s e l e c t e d from 1N935A 0 5 W 9 V 5 Zener r e p l a c e a b l e by 1N821 0 4 W 6 2 V 5 Incandescent 683 5 V 60 m A F i l t e r Low Pass 1 8 GHz F i l t e r Bandpass 10 MHz F i l t e r Bandpass 10 MHz F i l t e r Bandpass 10 MHz Coax mini Coax mini Coax mini Jack TIP Receptacle e l e c t r i c a l female B N C Jack TIP Receptacle e l e c t r i c a l snap on male Receptacle e l e c t r...

Page 91: ...ferrarnic suppressor Core f e r r a m i c s u p p r e s s o r 64 pH Core f e r r a m i c s u p p r e s s o r 64 pH 64 pH Termination coax S i l i c o n PET r e p l a c e a b l e by 3N159 S i l i c o n NPN r e p l a c e a b l e by 2N3415 S i l i c o n NPN r e p l a c e a b l e by 2N3415 S i l i c o n NPN r e p l a c e a b l e by SE3005 S i l i c o n hTN r e p l a c e a b l e by S 3 0 0 5 S i l i c ...

Page 92: ... c o n NPN r e p l a c e a b l e by SE3005 S i l i c o n NPN r e p l a c e a b l e by SE3005 S i l i c o n PNP r e p l a c e a b l e by 2N4122 S i l i c o n NPN s e l e c t e d from PIPS6515 S i l i c o n PNP r e p l a c e a b l e by 2N4258 S i l i c o n PNP r e p l a c e a b l e by 2N4258 BOlOlOO B039999X S i l i c o n FET s e l e c t e d from 284304 o r r e p l a c e a b l e by U1491 BOlOlOO B03...

Page 93: ...c o n NPN r e p l a c e a b l e by 2N3904 o r TE3904 S i l i c o n NPN r e p l a c e a b l e by 2N3904 o r TE3904 S i l i c o n NPN r e p l a c e a b l e by 2N3904 o r TE3904 S i l i c o n NPN r e p l a c e a b l e by 2N3904 o r TE3904 S i l i c o n NPN r e p l a c e a b l e by 2N3904 o r TE3904 S i l i c o n NPN r e p l a c e a b l e by 2N3904 o r TE3904 S i l i c o n NPN r e p l a c e a b l e by...

Page 94: ...Electrical Parts List 7L12 ELECTRICAL PARTS L I S T cont Ckt No RESISTORS R136 R137 R138 R139 R140 R141 R142 R143 R144 R145 Tektronix SerialIModel No Part No Eff Disc Description ...

Page 95: ...r m m o a r l r 3 h l r l o r l 0 0 0 0 0 0 0 0 0 I I I I I I I I I m r l 4 L n m r l m r l m L n r l N N r l r l N r l r l 4 r l m m m m m m m m m m r r l L n r l L n L n 4 r l L n N d 4 N r l d N N r l m m m m m m m m m r l d r l r l 4 d N r l r l N m m m m m m m m m m m r w o d r a r m o v a o r m m m r w o o m m m a r w o o r w o o m 3 r w m m m a a a a a a r r r r m m m m m w m w m m m m m m ...

Page 96: ... 00 R368 315 0121 00 R376 321 0077 00 R377 311 0622 00 22 R 114 W 5 22 R 114 W 5 61 9 R 118 W 1 100 R V a r 120 n 114 w 5 61 9 a 118 W 1 100 R V a r 120 R 114 W 5 61 9 R 118 W 1 100 R V a r 120 R 114 W 5 49 9 R 118 W 1 1 1 kR 114 W 5 255 R 118 W 1 100 W1 114 W 5 100 R 1 4 W 5 200 R V a r 2 4 k R 114 W 5 1 k R 114 W 5 2 k R V a r 1 k R 114 W 5 7 5 k Q 114 W 5 50 k R V a r 2 5 k R V a r 3 k Q 114 W ...

Page 97: ...R477 R478 R479 Tektronix Part No cont 315 0821 00 315 0133 00 315 0102 00 315 0202 00 315 0121 00 315 0511 00 315 0301 00 315 0391 00 315 0621 00 315 0511 00 SeriallModel No Eff Disc Description 10 k 1 4 W 10 15 kR 114 W 5 5 kS2 vkr 1 kR 114 W 5 174 R 118 W 1 174 R 118 W 1 1 MR 114 W 5 100 n w 10 200 R 1 4 W 5 ...

Page 98: ...0148 00 321 0337 00 316 0101 00 315 0201 00 321 0190 00 316 0101 00 315 0620 00 321 0297 00 321 0350 00 321 0184 00 200 R 114 W 5 100 kR 114 W 10 2 kR 114 W 5 510 Q 114 W 5 200 R Var 243 R 118 W 1 31 6 kR 118 W 1 100 R 114 W 10 200 R 114 W 5 931 R 118 W 1 2 m 1 4 W 5 510 R 114 W 5 200 R Var 243 R 118 W 1 31 6 kR 118 W 1 100 0 114 W 10 200 a i 4 w 5 931 R 118 W 1 100 a 114 w 10 62 R 114 W 5 ...

Page 99: ... Disc Description 12 1 kR 118 W 1 43 2 kR 118 W 1 806 R 118 W 1 200 R 114 W 5 31 6 kR 118 W 1 374 R 118 W 1 12 1 kR 118 W 1 2 kR 114 W 5 100 kR 114 W 10 2 M Var 2 kR 114 W 5 510 R 114 W 5 500 0 Var 390 R 114 W 5 31 6 kR 118 W 1 374 R 118 W 1 12 1 kR 1 8W 1 91 R 114 W 5 750 R 114 W 5 loo n 114 w 5 10 kR 118 W 1 1 kR 112 W 5 100 0 114 W 10 1 kR 118 W 1 499 R 118 W 1 200 R 118 W 1 200 R 118 W 1 100 k...

Page 100: ...O O 316 0104 00 B O l O l O O 316 0104 00 B O l O l O O 316 0104 00 XB040000 316 0104 00 B O l O l O O 316 0104 00 B O l O l O O 315 0431 00 315 0134 00 315 0333 00 315 0433 00 315 0470 00 315 0391 00 315 0471 00 XB020000 315 0391 00 315 0431 00 315 0102 00 321 0193 00 321 0195 00 47 R 114 W 5 30 kR 1 4 W 5 30 kR 114 W 5 47 R 114 W 5 820 R 114 W 5 5 1 kR 114 W 5 5 11 kR 118 W 1 1 MQ 114 W 5 1 MR 1...

Page 101: ...321 0240 00 R962 R964 R966 R967 RlOOO R l O O l R1002 R1003 R l O l O R l O l l R1012 Description 4 3 kR 114 W 5 100 R 114 W 5 3 09 kR 118 W 1 10 R 118 W 1 1 kR 1 8 W 1 2 5 kR Var 1 kR 118 W 1 47 5 R 118 W 1 3 09 kR 118 W 1 12 1 kR 118 W 1 1 5 kR 114 W 5 1 2 1 kR 118 W 1 16 2 m i e w 1 3 01 kR 118 W 1 4 75 kR 118 W 1 2 kR 118 W 1 3 9 MR 114 W 5 6 19 kR 118 W 1 4 02 kR 118 W 1 100 kR Var 100 kR 118...

Page 102: ...22 00 Serial Model No Eff Disc 470 R 114 W 5 270 R 114 W 5 10 R 114 W 5 100 R 114 W 5 1 2 kR 1 4 W 5 1 kR 114 W 5 1 MR 114 W 5 100 R 114 W 5 1 kR 114 W 5 8 2 kR 114 W 5 3 6 R 114 W 5 2 2 kR 114 W 5 22 kR 114 W 5 4 99 kn 118 W 1 10 kR 118 W 1 130 R 114 W 5 560 0 114 W 5 50 kR V a r 15 kn 114 W 5 309 n 118 W 1 3 61 kR 118 W 114 35 3 kR 118 W 114 182 kR 118 W 1 10 kR V a r 100 kR 118 W 1 100 kn 118 W...

Page 103: ... I I I N O m a m e a m r o a m v l c u v l v l m m m h l a N m m m N r l r l 0 0 0 0 0 0 0 0 0 0 I I I I I I I I I I v l r l r l r l r l r l r i i d d d N r l N N N N N N N m m m m m m m m m m d d d d r l d d r l r l r l 0 0 0 0 0 0 0 0 0 0 I I I I I I I I I I m o o m r a v l d d m d d r l 3 0 N 3 0 P I N N r O m v l o m m 3 m O d N N d N N N m d 0 0 0 0 0 0 0 0 0 I I I I I I I I I I d v l r n r l...

Page 104: ...56 00 321 0277 00 321 0289 00 321 0029 00 Description 1 6 kR 3 W WW 5 100 R 114 W 5 4 7 kR 114 W 5 27 kR 114 W 5 560 R 3 W WW 5 2 5 kR Var 412 R 118 W 1 7 5 kR 118 W 1 10 kR 118 W l z 19 6 R 118 W 1 1 kR Var 10 kR 118 W 1 5 kR Var 100 kR Var 100 kR 1 4 W 5 1 MR 114 W 5 2 kR 118 W 1 11 5 kR 118 W 1 100 kR 114 W 5 4 7 kR 114 W 5 100 R 1 4 W 5 20 kR 114 W 5 1 kR 114 W 5 1 kR 114 W 5 100 kR 114 W 5 46...

Page 105: ...0289 00 311 0635 00 321 0264 00 321 0318 00 25 R 5 W WW 1 100 R 1 4 W 5 220 R 114 W 5 3 kR 1 4 W 5 2 7 R 1 4 W 5 1 kR 1 4 W 5 1 kR 1 4 W 5 1 kR 1 4 W 5 2 7 R 114 W 5 2 7 0 1 4 W 5 1 5 kR 114 W 5 10 kR 1 8 W 1 68 kR 1 4 W 5 68 kR 1 4 W 5 1 kR 1 4 W 5 680 R 114 W 5 2 7 kfi 1 4 W 5 10 kR 1 8 W 1 1 kR Var 5 49 kR 118 W 1 20 kR 1 8 W 1 4 99 kR 1 8 W 1 3 3 kR 1 4 W 5 680 R 1 4 W 5 100 kR 1 4 W 5 10 kR 1...

Page 106: ...260 00 311 0634 00 321 0260 00 315 0301 00 Description 18 2 kR 1 8 W 1 10 kR V a r 35 7 kR nominal value s e l e c t e d 4 02 kR 118 W 1 11 3 kR 118 W 1 10 kR 118 W 1 4 99 kR 118 W 1 500 R Var 4 99 kR 118 W 1 300 R 114 W 5 12 kR 112 W 5 14 kR 118 W 1 B O l O l O O B039999 150 kR 118 W 1 B040000 1 5 MR 114 W 5 10 R Var 2 74 kR 118 W 1 200 kR Var 200 kR V a r 200 kR Va 200 kR Var 200 kR Var 200 kR V...

Page 107: ... Tektronix Serial Model No Part No Ebb Disc c o n t 321 0338 00 321 0260 00 311 0978 00 321 0188 00 322 0139 00 322 0145 00 321 0402 00 321 0327 00 321 0402 00 321 0356 00 A Description 32 4 kR 118 W 1 4 99 kR 118 W 1 250 R Var 887 R 118 W 1 274 R 114 W 1 316 R 118 W 1 150 kR 118 W 1 24 9 kR 118 W 1 150 kR 118 W 1 49 9 kR 118 W 1 ...

Page 108: ...ro i d Toroid Toroid Toroid Toroid Toroid Toroid Toroid 3 windings t h r e e 4 t u r n windings 2 windings two 4 t u r n windings 2 windings 2 windings 2 windings 2 windings 2 windings 2 windings 2 windings 2 windings Quad o p e r a t i o n a l a m p l i f i e r Dual compl p a i r plus i n v e r t e r replaceable by C114007AE Dual compl p a i r p l u s i n v e r t e r r e p l a c e a b l e by CD40...

Page 109: ...Dual operational amplifier replaceable by N5558V Dual operational amplifier replaceable by N5558V Voltage regulator replaceable by UA723C Quad operational amplirier Dual operational amplifier replaceable by N5558V Single monostable multivlbrator one shot replaceable by SN74121N Dual 15 MHz J K master slave flip flop replaceable by SN7473N Single 10 MHz 1 3 bit binary ripple counter replaceable by ...

Page 110: ...iamond O Refer to waveform number indicated in hexagon I Connection soldered to circuit board Connection made to circuit board with interconnecting pin Blue tint encloses components located on circuit board I h e following prefix letters are used as reference designators to identify components or assemblies on the diagrams Assembly separable or repairable circuit board etc Attenuator fixed or vari...

Page 111: ... at the point indicated and the spectrum display The signal source has a vanable output attenuator Signal level into the RF lNput and other waveform data are indicated with each illustration either as readout or extra data with the waveform 1 Sweep signals frequency span voltages etc are shown using a DC coupled probe Therefore DC levels are indicated as well as signal amplitudes The spectrum anal...

Page 112: ... LEVELING LCOP I ERROR l AMPLIFIER COMPENSATION AMPLIFIER 7 PHASE DETECTOR L J L5V i IS osc 1 I t 1 I S V FLOAT1NG 1 A WWFRSUWUHe q 1 ST LOCAL 1 t I I I I I I I I 1 I AVERAGE LEVEL DEPEND5 ON F I N E C F CONTROL AND DIGITAL VOLTAGE MEMORY INPUTS ...

Page 113: ... H z t 3 M H j XTAL CONTROLLED M H Z JOOHZ 1 I S W E E P MAX SPAN to ZMHI DIV i 1 I I I I VARIABLE DC PHASE LOCK MO FI I I GAIN 1 j 1 I Y I I Kvn I0 M H z I SELECTOR L SWEEP SHAPE4 I I I FILTER I I OFF VERTLCAL VIDEO I AMPLIFIER TRIGGER I _ _ ___ _ _ __ l X G4ERINrS MOPE 3 A20 AND I SOURCE SEI ECCTOR r A All 8 1 1 n v _ SWEEP GATE A 6 6 12 DL BLOCK DIAGRAM ...

Page 114: ... DRIVE A4 LINE TRIGGER A3 A SWEEP A2 UTILITY COMMON A1 SWEEP GATE ROW CH 2 B38a ANALOG DATA CH 2 a B37b sB36 PLUG IN MODEa B35m DVM COMMON B 3 4 0 1 1 1 B33m 3 m B 3 2 b TIMESL 0T PULSE LINES 5 B31m 7 B30 9 1 B29 B28 B27 IPC COMMON 2 6 s Irn B2sm SPARES FOR B24 FUTURE USE B23m a B22Q rn B 2 l a TRIGGER IN HI B 2 0 a 50 POWER B 1 9 8 15 POWERB BIB AUX Z AXlS C O M M 1 7 AUX Y AX IS 8 1 6 1 SINGLE S...

Page 115: ... Phase Lock Mode P I 0 A1300 Phase Lock Circuit Board ...

Page 116: ...yp s4 FILTER I 1 DC I F L O Z I BLOCK POWER SUPPLY AUX OUTPUT I SAMPLINL GATE DRIVER ISV R1300 AVALANCHE 47 V O L T A G E 15V IN PHASEISCK MODE ...

Page 117: ... r AIO A 4 I 2 09s GHz BP 0 eTO J 8 0 I05MHz CIS Cl6 C17 6 P29 6 5 72 NL MICROWAVE ASSEMBLIES 6 ...

Page 118: ...I I 4200 Resolution Circuit Board A80A1 105 MHz Amplifier and 3rd Mixer Circuit Board ...

Page 119: ......

Page 120: ......

Page 121: ...Input 10 dBrn TimeIDiv 5 ms Input 18 dBm TimeIDiv 5 rns ...

Page 122: ...R 8 5 R 8 4 IOS MHz IFAMPL j SRD MlKER 39k llok R S 6 3MHz HELICAL C85 C86 3 iiO RESONATOR 0 0 1 MINIMUM IM ADJUST L82 150hH CR94 CR9 494 51 TUNING MATCHED DIODES I ...

Page 123: ...3 0 MIXER 95MHz LO 6 PRERESOLUTION AMPLIFIER ...

Page 124: ......

Page 125: ...A200 Resolution Circuit Board C211 4 t J o Ik 0 ...

Page 126: ......

Page 127: ... 18 dBm TimeIDiv 5 ms lnput 18 dBm Q lnput 35 dBm T meIDlv 5 ms i rpof 1 Input 30 dBm Input 30 dBm lnput 30 dBm Wide Filter lnput 30 dBm Narrow Filter 0 lnput 30 dBm 30 kHz Filter lnput 30 dBm 30 kHz Filter ...

Page 128: ......

Page 129: ... BANDWIDTH FILTRCS POST RESOLAMPL ...

Page 130: ...changedSN 8040000 ...

Page 131: ...zOUT I A500 Function I F Circuit Board ...

Page 132: ...A800 Function I F Connector Circuit Board I t L Below SN B040000 ...

Page 133: ...Input 30 dBm lnput 30 dBm lnput 30 dBm Gain 8 dB1 Input 30 dBm lnput 30 dBm Input 30 dBm Input 30 dBm ...

Page 134: ...FROM P479 ...

Page 135: ......

Page 136: ...GND ChangedSN 8040000 ...

Page 137: ......

Page 138: ...A800 Function I F Connector Circuit Board t y CR842 wR8380 1 0 PC EQ 15 o A R831 R835 3 2 4 R832 I 1 0 R830 a 3 1 0842 GND R826 t I Below SN B040000 ...

Page 139: ...1 n Input 30 dBm ISV VIDEO FROM 12819 0 I I DSSOB DS3OA I COM t s v I TO P101 0 lO COM ...

Page 140: ...I V I D E FlLTEPS T T I I LIGHTS I S V LIGHTS TO P10 2 9 lO COM L G W T S E E PARTS UST FOR EARLIER VALUES AND SERIAL NUMBER RANGES OF PARTS MARKED WITH BLUE OUTLINE ...

Page 141: ...CONTRAST m VIDEO FILTERS PROL SSO R BASELINE CLIPPER a VERTICAL OUTPUT ...

Page 142: ......

Page 143: ...0 0 0 0 0 0 0 0 0 0 C 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 o o o o o o o R11 A1000 Sweep Circuit Board i ...

Page 144: ......

Page 145: ......

Page 146: ...TR16GlZR 80UUCO SELECTOR ASSEMBLY AlOl SlOlA SlOlC 5V LIGHTS TO KlZOOSl 15V WEEP 8oaW FROM SIOlA P P AUTO Kt130 ENER612e ...

Page 147: ...TR GGLR 5 LCE L UE TRIGGER LSVEL NTER NQ 7 7 e 15V 15V U 06 0 PiO36 3 2 e 15V PK PI01I I ISV v SWEEP TRIGGERING 6 6 12DL ...

Page 148: ...0 0 0 0 0 0 0 g 3 3 0 5 1 L z z z z z z K K K K K K I 0 0 0 0 0 0 0 ...

Page 149: ...A1000 Sweep Circuit Board ...

Page 150: ...ClOlO ClOll ZE ff ...

Page 151: ......

Page 152: ... t S O V N O T USED 7LIZ ...

Page 153: ...sWEEPGENEkATOR 4 HOLWFF b12 DL ...

Page 154: ...A 110 Start Center Selector Circuit Board ...

Page 155: ... l I I I I I I I I I I I I I 1 1 1 1 1 I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I 1 I 1 l 1 1 1 PI10 1 Y I I I I I I I I I I I sov I I I I 1 1 1 1 1 1 1 I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I 1 1 1 1 l 2 4 6 8 1 3 5 7 9 A X SPAN p j MHz s SHOWN IN MAY SPAN POSITION ...

Page 156: ... I I I I 1 1 1 1 1 1 1 1 1 1 1 I I I I I I I I I I I I I I I I 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 l 1 1 1 1 1 1 1 1 1 1 1 1 I I I I I I I I I I I 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 l 1 1 2 4 6 8 1 0 1 3 5 7 9 l 4 I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I 1 5 1 1 1 3 1...

Page 157: ......

Page 158: ... Added SN B030000 A1300 Phase Lock Circuit Board ...

Page 159: ......

Page 160: ...CAL 0 OUT P I 0 A500 Function I F Circuit Board ...

Page 161: ...5 2 0 B CI527 0 1 zI c a C15zz IPF O p F b VOLTAGE SET Rl512 Rl514 31517 R15ZO CR1514 CRISIS 6 8 k 15V U1520 155 0035 F R O M C 1420 c15v R1521 IS LO P O W E R SUPPLY F rf h I FERRlTE BEAD R956 AMPLITUDE 2 5 k 50MHz CALIBRATOR ...

Page 162: ...56 AMPLITUDE 5 k l p u r r un FOR m a VALUES AND IQUL N U UWQEsoFPurr wnn uur N E 1 272 hl L Iz LO POWER SUPPLY CALIBRATOR ARTEK MEDIA Digitally signed by ARTEK MEDIA DN cn ARTEK MEDIA c US o DC Henderson Date 2006 12 15 17 08 57 06 00 ...

Page 163: ... 2 0 R1371 R1373 a PI316 o Strap C1381 U1350 K1400 ...

Page 164: ...A1300 Phase Lock Circuit Board ...

Page 165: ......

Page 166: ...ForY Pin 7 of U1540 open to allow clrcutt to run Pin 7 of U 1540 open ...

Page 167: ...FROM S1006 ll I L L L ...

Page 168: ...MARKER CEN Y IG COIL DRIVER 8 VOLTAGE MEMORY AND PHASE LOCK 1272 DL ...

Page 169: ......

Page 170: ... AddedSN B030000 A1300 Phase Lock Circuit Board ...

Page 171: ......

Page 172: ... DC Coupled FlNE Tuning Centered DC Coupled FlNE Tuning Centered Q ov A1700 Sweep Shaper Circuit Board ...

Page 173: ......

Page 174: ...I 2 7 1 N L SWEEP SHAPER 2 2 GHz OSC TUNING CAVITY ...

Page 175: ......

Page 176: ...M C1147 0 0 0 o o u o 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 R11 A1000 Sweep Circuit Board ...

Page 177: ......

Page 178: ......

Page 179: ...SHOWN IN sPEeFRuW PosITIoN SHOWN IN 3MH2 SITI ION I RESOLUTION FREQUENCY SPAN 4 SWEEP EElrDOlJS ...

Page 180: ...P O A130A1 Display Mode Connector Circuit Board ...

Page 181: ...A l A l Reference Level Readout Circuit Board 8 ...

Page 182: ...r R E F E R E N C E L E V E L d B m I I I REFERENCE LEUEL RGAOOU ...

Page 183: ......

Page 184: ...I _ _J P O A130A2 Dtsplay Mode Res storCircuit Board 6 ...

Page 185: ...PI0 A130A1 Display Mode Connector Circuit Board ...

Page 186: ...II O B D I V 1 T I I I P84 PI32 S83 I 1 IREFERENCE LEVEL tL IF GAIN f ...

Page 187: ...S130B S130C I I I L P820 I 6 1 12NL DISPLAY MODE I AI000 LSwEEP BOAR F SELECTORS ...

Page 188: ...ny change in part number Change information if any is located at the rear of this manual PARTS REPAIR AND REPLACEMENT PROGRAM Assemblies that contain a number of hybrid circuits or substrates in a semisealed module or complex assemblies that require special tools or knowledge to service may be returned to your local TEKTRONIX Field Office for repair or replacement Refer to parts price list or your...

Page 189: ...ple of the indentation systern used in the Description column Assembly and or Component Detail Part of Assembly and or Component mounting hardware for Detail Part Parts of Detail Part mounting hardware for Parts of Detail Part mounting hardware for Assembly and or Component Mounting hardware always appears in the same indentation a s the item it mounts while the detail parts are indented to the ri...

Page 190: ...art No Eff Disc Description 1 2 3 4 5 KNOB gray F R E Q U E N C Y MHz coarse knob includes SETSCREW 5 40 x 0 125 inch HSS SPRING WASHER plastic 0 13 ID x 0 375 inch OD KNOB red VARIABLE CAL gain knob includes SETSCREW 5 40 x 0 125 inch HSS KNOB gray GAIN SELECTOR knob includes SETSCREW 5 40 x 0 125 inch HSS RING knob skirt BUSHING sleeve 0 128 ID x 0 25 OD x 0 20 in lg KNOB charcoal RF ATTENUATOR ...

Page 191: ... a t c h SHIELDING GASKET FRAME r e a d o u t FRAME p u s h b u t t o n CABLE ASSEMBLY e l e c t r i c a l W2 CABLE ASSEMBLY e l e c t r i c a l W3 ATTENUATOR AT3 CABLE ASSEMBLY e l e c t r i c a l W4 CABLE ASSEMBLY e l e c t r i c a l W5 CABLE ASSEMBLY e l e c t r i c a l W22 CABLE ASSEMBLY e l e c t r i c a l Wl CABLE ASSEMBLY e l e c t r i c a l W34 CABLE ASSEMBLY e l e c t r i c a l W6 CABLE A...

Page 192: ...t LAMPHOLDER SWITCH s l i d e S 1 2 0 JACK t i p CIRCUIT BOARD ASSEMBLY START CTK FREQ S e e A l l 0 e l e c t r i c a l l i s t c i r c u i t b o a r d a s s e m b l y i n c l u d e s TERMINAL p i n 0 4 6 i n c h l o n g SOCKET p i n c o n n e c t o r m o u n t i n g h a r d w a r e n o t i n c l u d e d w l c i r c u i t b o a r d a s s e m b l y SCREW 1 72 x 0 2 5 i n c h 82 c s k FHS 1 COUNTER...

Page 193: ...999 1 B040000 1 CIRCUIT BOARD ASSEMBLY VIDEO FILTER PROCESSOR See A90 electrical list circuit board assembly includes TERMINAL pin 0 365 inch long TERMINAL pin 0 365 inch long mounting hardware not included w circuit board assembly SCREW 4 40 x 0 25 inch 100 csk FHS CLIP spring tension SPACER SPACER 1 RESISTOR variable mounting hardware not included w resistor 2 NUT hex 0 25 32 x G 312 inch 1 TERM...

Page 194: ...ont 386 2023 01 B040000 1 SUBPANEL front mounting hardware not included w subpanel 11 0 213 0192 00 8 SCREW thread forming 6 32 x 0 50 inch Fil HS 1 HYBRID CIRCUIT ASSEMBLY A20 mounting hardware not included wlhybrid circuit assembly 1 SCREW 4 40 x 0 25 inch PHs 2 SCREW 2 56 x 0 281 inch 82 csk PHs 1 DIFFERENTIAL ASSEMBLY Al 1 SPRING flat sliding ground 1 OSCILLATOR ASSEMBLY 2 4 GHz A30 mounting h...

Page 195: ...5 inch 1 CIRCUIT BOARD ASSEMBLY DISPLAY MODE A130 mounting hardware not included w circuit board assembly 2 NUT keps 4 40 x 0 25 inch 2 SPACER 4 40 x 0 50 inch long 1 CLAMP cable 0 375 inch diameter mounting hardware not included wlclamp 1 NUT keps 4 40 x 0 25 inch 1 WASHER D shape 0 191 ID x 0 515 inch 1 SUPPORT circuit board mounting hardware not included w support 1 SCREW 4 40 x 0 25 inch PHs 1...

Page 196: ... e a d f o r m i n g 6 32 x 0 5 0 i n c h F i l HS 1 G U I D E c i r c u i t b o a r d p l a s t i c m o u n t i n g h a r d w a r e n o t i n c l u d e d w l g u i d e 4 SCREW 6 32 x 0 2 5 i n c h PHs 4 NUT s l e e v e 6 32 x 0 3 4 4 i n c h 1 G U L D E c i r c u i t b o a r d p l a s t i c m o u n t i n g h a r d w a r e n o t i n c l u d e d w l g u i d e 3 SCREW 6 32 x 0 2 5 i n c h PHs 1 SCRE...

Page 197: ... h e x s t u d 4 4 0 x 0 1 8 8 x 0 5 4 i n c h l o n g CATCH l a t c h c a t c h i n c l u d e s SCREW 4 40 x 0 2 5 i n c h PHs SCREW 4 4 0 x 0 1 2 5 i n c h PHs SPRING l a t c h CATCH l a t c h s a f e t y SPACER s l e e v e 0 2 5 i n c h l o n g RUT k e p s 4 40 x 0 2 5 i n c h WIRING HARNESS P h a s e l o c k WIRING HARNESS P h a s e l o c k w i r i n g h a r n e s s i n c l u d e s CONNECTOR t...

Page 198: ...EMBLY See A1 electrical list differential assembly includes 1 DIAL panel 1 CIRCUIT BOARD ASSEMBLY REFERENCE LEVEL READOUT See AlA1 mounting hardware not included wicircuit board assembly 4 NUT hex 2 56 x 0 188 inch 4 WASHER lock internal 0 092 ID x 0 18 inch OD 4 WASHER flat 0 09 ID x 0 188 inch OD 32 TERMINAL pin 0 365 inch long 1 RESISTOR variable See R82 S82 electrical list mounting hardware no...

Page 199: ... div RESISTOR variable mounting hardware not included w resistor SCREW 2 56 x 0 188 inch PHs WASHER lock internal 0 92 ID x 0 18 inch OD NUT hex 0 25 32 x 0 312 inch WASHER lock internal 0 261 ID x 0 40 inch OD WASHER flat 0 256 ID x 0 438 inch OD PLATE mounting POST 2 56 x 0 156 x 0 812 inch long COUPLING shaft coupling includes SETSCREW 4 40 x 0 094 inch HHS SHAFT extension 7 60 inches long BEAR...

Page 200: ... n c h O D PLATE m o u n t i n g WASHER f l a t 0 2 5 6 I D x 0 4 3 8 i n c h O D BEARING f r o n t w i n s e r t s COUPLING s h a f t c o u p l i n g i n c l u d e s SETSCREW 4 40 x 0 0 9 4 i n c h HSS SHAFT e x t e n s i o n 1 0 1 2 5 i n c h e s l o n g NUT h e x 4 40 x 0 1 8 8 i n c h m o u n t i n g h a r d w a r e n o t i n c l u d e d w l a c t u a t o r a s s y SCREW s e m s 4 40 x 0 3 1 2...

Page 201: ...t i n c l u d e d w c i r c u i t b o a r d a s s e m b l y SCREW 1 7 2 x 0 2 5 i n c h PHs WASHER l o c k i n t e r n a l 0 2 0 I D x 0 3 7 6 i n c h OD 1 SHELL ASSEMBLY t u n e d c a v i t y A80A2 s h e l l a s s e m b l y i n c l u d e s 1 SHELL t u n e d c a v i t y 3 SCREW t u n i n g 0 2 5 4 0 x 0 3 1 2 i n c h l o n g 3 INSERT a n t i r o t a t i o n t u n i n g s c r e w m o u n t i n g h ...

Page 202: ...W I R I N G HARNESS r e s o l u t i o n w i r i n g h a r n e s s i n c l u d e s 2 3 CONNECTOR t e r m i n a l 2 CONNECTOR t e r m i n a l 2 HOLDER t e r m i n a l c o n n e c t o r 1 w i r e b l a c k 3 HOLDER t e r m i n a l c o n n e c t o r 2 w i r e b l a c k 1 HOLDER t e r m i n a l c o n n e c t o r 3 w i r e b l a c k 1 HOLDER t e r m i n a l c o n n e c t o r 4 w i r e b l a c k 1 HOLDER...

Page 203: ...See Figure 2 for subpart ...

Page 204: ...7L12 SPECTRUM ANALYZER ...

Page 205: ...A l A l 7L12SPECTRUM ANALYZER ...

Page 206: ......

Page 207: ...TWORK 75 nto 50 a 11 25 dB loss OPTIONS TO 7000 SERIES OSCILLOSCOPES CRT with P7 phosphor and time domain graticule The external graticule for spectrum analyses part of standard accessories should be used CRT with P7 phosphor and an internal spectrum analyznr graticule designated P7SA This is recommended when the oscilloscope mainframe is to be used exclusively with spectrum analyzer systems l his...

Page 208: ... Part No Q SerialIModel No t Eff Disc y 1 2 3 4 5 Description SHIELD implosion SHIELD implosion FILTER light CRT amber CABLE ASSEMBLY RF male BNC connector both ends ADAPTER connector BNC to M MANUAL instruction not shown 7L12 SPECTRUM ANALYZER ...

Page 209: ...REPACKAGING Fig Q Index Tektronix SerialIModel No t No Part No Eff Disc y 1 2 3 4 5 Description 7L12 SPECTRUM ANALYZER 1 CAR TON ASSEMBLY carton assembly includes 2 END CAP 1 PAD SET 4 piece 1 CARTON ...

Page 210: ...mmediately into printed manuals Hence your manual may contain new change information on following pages A single change may affect several sections Sections of the manual are often printed at different times so some of the information on the change pages may already be in your manual Since the change information sheets are carried in the manual until ALL changes are permanently entered some duplic...

Page 211: ...rK1CAT PARTS 1 IST AND SCHFIMATTC CORRECTION CHANGE TO A 500 670 1756 03 FUNCY ION l P C i r c u i t Board Assembly A 1300 676 1755 03 FHASE LOCK Circui t Board Assembly All VIIX 0 I I T I F S PROCIF_5 30Fi ...

Page 212: ...248 R253 R283 R356 R366 R376 R336 R437 R438 R1163 R l l h 4 It1220 R2591 K1781 TRANSFOMERS T90 r 9 2 SWEEP DlSPKKSION C i r c u i t Boaril Assernbly 7 pF r orriiraalvalue selected 2 2 kfl 1 4 W 5 43 R I 1 4 W 5 43 R 1 4 W 5 88 7 Q 1 8 W 1 88 7 R 1 8 W LZ 88 7 52 118 W 1 51 R 1 4 W 5 240 R 1 4 W 5 1 kJl 1 4 W 5 5 23 kQ 1 8 W 1 9 09 kR 1 8 W 2 30 9 kR 1 8 W 1 35 7 kS2 n o r l r r r a l value s lectc...

Page 213: ... 00 150 pE Cer 500 V L89 108 0182 00 0 3 UH L382 276 0543 00 Core feri rasic suppressor RESISTOKS R81 317 0752 00 R 87 317 0470 00 R2h3 315 0620 00 TRANSFOWEKS T420 120 0793 00 Toroid 2 windings 7 5 kQ nor rinal va 1ue selected 47 Q 1 8 W 5k 62 Q 1 4 W 5 MISCtllbNICAL PARTS LIST CORRECTION Page 9 14 CHANGE TO Fig 2 104 119 0334 01 1 I F MODULE ASSFaWRL Y 185 MHz A80 ...

Page 214: ...D 7212 EFF SN BO70000 up Page 3 o f 3 d SCHEMATIC CORRECTIONS PART IAL RESOLUTION BANDWIDTH FILTERS OUTPUT AMP ...

Page 215: ... the converted signals Figure 3 now shows that reducing the mixer bias current from 1 43 mA to 1 03 mA reduces the intermodulation products by 10 dB while not substantially affecting the de sired conversion efficiency The 7L12 Spectrum Analyzer is combined with se the 7D13 digital multimeter to provide increased 2 0 m F S 4 test set up measurement capability Digital mul timeter information and fre...

Page 216: ...order intermodulation is better than 50 dB down Also note that the 3 kHz signal intersects the zero hertz marker 50 dB below full screen The 7L12 provides well over 40dB of dynamic range even for signals down to 3 kHz well outside its specified frequency range Limitations It is also important to point out limitations in the analyzer s capability below 100 kHz The input not to be confused with on s...

Reviews:

No comments

Brands by name

Popular brands

Load more brands