Tektronix 1L40 Instruction Manual Download Page 50 | Manualshive

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Maintenance— Type 1L40

Component Replacement

The physical size and shape of the replaced component

may affect the performance of the circuit; therefore, it is
best to duplicate the original component as closely as pos

sible.  Parts  orientation  and  lead  dress  should  also  duplicate
those  of  the  original  part.  Many  of  the  components  are
oriented  to  reduce  or  control  circuit  capacitance  and  induc
tance.  After  repair,  the  circuits  of  the  instrument  may  need

recalibration.

Removing and Replacing Switches

Single wafers on the DISPERSION-COUPLED RESOLUTION

switches  are  not  normally  replaced.  If  any  of  these  wafers
are  defective,  the  entire  switch  should  be  replaced.  Refer  to
the  Electrical  Parts  List  to  find  the  unwired  or  wired  switch

part numbers.

CAUTION

W hen disconnecting o r connecting leads to a
w a fe r-ty p e sw itch, do not let solder flo w around

4 -1 0

Fig. 4 -1 0 . Semiconductor base pin and socket arrangements.

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Summary of Contents for 1L40

Page 1: ...IV IA IN I U A L Serial N um hef TYPE 1L40 Le h i SPECTRUM ANALYZER Tektronix Inc S W M illikan W ay P O Box 500 Beaverton Oregon 97005 Phone 644 0161 Cables Tektronix 070 0904 00 1068 ...

Page 2: ...the field therefore all requests for repairs and re placement parts should be directed to the Tektronix Field Office or representative in your area This procedure will assure you the fastest possible service Please include the instrument Type and Serial or Model Number with all requests for parts or service Specifications and price change privi leges reserved Copyright 1968 by Tektronix Inc Beaver...

Page 3: ...Section 6 Electrical Parts List Mechanical Parts List 1 Information Section 7 Mechanical Parts List Section 8 Diagrams Mechanical Parts List Illustrations Accessories ro f 1 6 r C O U M TB p Abbreviations and symbols used in this manual are based on or taken directly from IEEE Stand ard 260 Standard Symbols for Units MIL STD 12B and other standards of the electronics industry Change information if...

Page 4: ...20 50 10 n o RF CENTER INT REF 1 MH CAL FREQ LOCK FREO MARKERS CHECK 5 7 RF INPUT TEKTRONIX INC SERIAL PORTLAND OREGON U S A SWEEP INPUT V MWI0OTN K1ICTW 4 O N B MATE f Type 1L40 Fig 1 1 Type 1140 Spectrum Analyzer ...

Page 5: ...ontrol centered and FINE RF CENTER FREQ control centered Local Oscillator Frequency Range 1 7 GHz to 4 2 GHz Dispersion MHz CM Range 2MHz cm to lOMHz cm in a 1 2 5 sequence Accuracy See Table 1 2 Linearity Within 3 over a 10 centimeter display A Tektronix Type 81A Plug In Adopter must be used with 580 Series Oscilloscopes JThe Type 1L40 is normally supplied w ith a coaxial mixer Tektronix Part No ...

Page 6: ...GHz 80 dBm 60 dBm 5 Waveguide4 119 0099 00 26 5 40 0 GHz 70 dBm 50 dBm ENVIRONMENTAL CHARACTERISTICS The following environment test limits apply when tested in accordance with the recommended test procedure Details on environmental test procedures including failure criteria etc may be obtained from Tektronix Inc Contact your local Tektronix Field Office or representative Characteristic O perating ...

Page 7: ...y may be present This distortion is caused by a portion of the vertical output signal from the Vertical Signal Out C F V1223A V1050B Type 545 feeding into the Spectrum Ana lyzer on the 225 V supply The distortion appears as a change of dispersion linearity with a change of the analyzer GAIN control setting and is most noticeable in the narrow dispersion setting such as 1 kHz cm It also appears as ...

Page 8: ...m analyzer sensi tivity usually expressed in dB Frequency band The range of frequencies that can be covered without switching Frequency scale The range of frequencies that can be read on one line of the frequency indicating dial Incidental frequency modulation residual frequency modulation Short term frequency jitter or undesired frequency deviation caused by instabilities in the spectrum analyzer...

Page 9: ...he follow ing type 1 IF feedthrough Signal frequencies within the IF pass band of the spectrum analyzer that are not converted in the first mixer but pass through the IF amplifier and produce displays on the CRT that are not tunable with the RF center frequency controls 2 Image response The superheterodyne process results in two major IF responses separated from each other by twice the IF The spec...

Page 10: ...ately 1 kHz and selects the reference frequency source inter nal or exte rna l Phase Lock Connector Used to apply an exter nal reference frequency to the phase lock circuits or to provide an outlet Tor the internal 1 MHz reference f r e q u e n c y markers which may be used to calibrate the dis persion MIXER PEAKING O pti mizes the conversion ac tion o f the mixer RF INPUT Coaxial re ceptacle whic...

Page 11: ...m resolution VERTICAL DISPLAY RF CENTER FREQ FINE RF CEN TER FREQ MIXER PEAKING LOCK CHECK INT REF FREQ 1 MHz MARKERS OUT EXT REF FREQ IN TO RECORDER Selects logarithmic linear or square law display for the frequency domain displays and VIDEO for a time domain display In the LOG position signal display amplitude is logarith mic with a dynamic range 4 0 dB In the LIN position a signal display ampli...

Page 12: ...us signals on the display Add at least 10 dB of attenuation to the input when the signal begins to compress no increase of signal amplitude wth an increase of signal level A conversion chart Fig 2 5 may be used to calculate input signal level CAUTION Signals stronger than 1 5 dBm applied to the input or mixer w ill damage or burn out the mixer diodes Mismatches between the signal source and the RF...

Page 13: ...F ATTEN dB switches for a signal amplitude on the display of approximately 4 centi meters 9 Tune the signal to the extreme left graticule line with the RF CENTER FREQ control Note the dial reading Tune the signal to the extreme right graticule line and note the dial reading The difference between dial readings is the total dispersion window for this 10 centimeter display Tune the signal to the cen...

Page 14: ...h the LOCK CHECK button and turn the RF CENTER FREQ control slowly through the signal frequency Note the phase lock beat signals between the tunable local oscil lator and the Internal Reference Frequency oscillator as the display blooms then snaps into the phase lock opera tion Fig 2 6 See Phase Lock Operation on page 2 16 With the LOCK CHECK button depressed adjust the FINE RF CENTER FREQ control...

Page 15: ... Front panel calibration is required if this requirement is not met Perform the following adjustments if front panel calibration is required NOTE These adjustments interact and must be performed in sequence Final adjustment is made with the DISPERSION RANGE selector in the kHz cm position and the DISPERSION in the 1kHz position Fine adjustment of the DISP BAL with the IF CENTER FREQ set to 000 per...

Page 16: ...ts the local oscillator frequency a slight amount It also affects the vertical position of the display baseline Thus by depressing the LOCK CHECK button and slowly turning the FINE RF CENTER FREQ control the operator will observe the baseline of the display shift until a lock mode is reached The baseline will then remain stationary over a portion of the control range as the circuit holds the local...

Page 17: ...isplay without losing phase lock by adjusting the INT REF FREQ con trol Vertical Display Modes The dynamic range of the displayed signal is dependent on the mode position of the VERTICAL DISPLAY switch For example The LOG 40 dB full screen position will accentu ate the side lobes of a signal while the SQ LAW position will de emphasize the side lobes Fig 2 8 illustrates the effect of each display m...

Page 18: ... a particular frequency setting the front panel DISP CAL may be used to calibrate the dispersion for a specific IF CENTER FREQ control setting The procedure is as follows 1 Adjust the front panel controls for the desired display 2 Turn the INT REF FREQ control ccw but not OFF Apply the 1 MHz CAL MARKERS OUT signal to the RF INPUT connector This should provide a picket fence display See Fig 2 7 3 I...

Page 19: ...ion bandwidth of the analyzer should be on the order of 1 10 of the side lobe frequency width or the reciprocal of the pulse width The RESOLUTION control is usually set after the sweep rate has been adjusted for optimum main lobe detail See Fig 2 10 Selecting the Sweep Rate The sweep rate for wide resolution coupled settings is usually set just above the visual flicker setting however as the DISPE...

Page 20: ... therefore be necessary to adjust the FINE RF or IF CENTER FREQ control to shift the sweep start away from a spectrum null point See Fig 2 12 If the signal is time related to the power supply line fre quency it is best to trigger the oscilloscope on the Line frequency FREQUENCY Fig 2 13 Formation of a spectrum F is the fundamental or carrier frequency Fi and F are the modulating frequencies A CENT...

Page 21: ... basic spectrum displays and basic applications for the Type 1L40 Spectra of Amplitude Modulation When a CW signal is amplitude modulated by a single frequency two additional frequencies or sidebands are generated The frequencies of these sidebands are the sum and difference between the carrier and the modulating fre quency See Fig 2 13 The amplitude of these sidebands depends on the percentage of...

Page 22: ...lse forms and their spectra are also described in Reference Data for Radio Engineers 4th edition Chapter 35 ITT 1956 Fig 2 16A illustrates a theoretical voltage spectrum of a pulse modulated oscillator that is modulated by a rec tangular pulse The main lobe and the side lobes are shown as groups of spectral lines extending above and below the baseline The number of these side lobes for a truly rec...

Page 23: ... to an input signal whose frequency is above the local oscillator frequency by a difference of the IF is called an image response The input signal that is the IF below the oscillator frequency is the true response For example the analyzer will receive a 2 7 GHz signal at a dial reading of 2 7 GHz oscillator frequency of 2 9 GHz and at a dial reading of 2 3 GHz oscilloscope frequency of 2 5 GHz At ...

Page 24: ...he dispersion window as the RF Center Frequency is tuned is not coincident with the dial scale reading Most of the spurious signals described with the exception of intermodulation products can be reduced or eliminated by the use of external bandpass filters APPLICATIONS These basic applications for the Type 1L40 Spectrum Analyzer are presented to familiarize you with its operation Relative Amplitu...

Page 25: ...paration or frequency difference between the two signals NOTE Accuracy o f this measurement depends on the DIS PERSION RANGE settings See Characteristics section Frequency Stability The Type 1L40 may be used to measure both long and short term frequency instabilities when the local oscillator is phase locked to a stable crystal controlled reference fre quency See Stability in Characteristics secti...

Page 26: ... main lobe is an indication of the frequency modulation provided the resolving power of the analyzer is sufficient See Fig 2 18C Double peaks in the main lobe indicate that the oscillator is operating in two or more modes which could be caused by some external load such as mismatched transmission lines or fluctuating supply voltages A visual indication is provided to tune the transmitting system s...

Page 27: ...e plug in oscilloscope Trigger Source selector to Int position and adjust the triggering controls for a stable triggered display The IF CENTER FREQ FINE control may require slight adjustment to displace the spectrum null point from the sweep start See Fig 2 12 4 Set the Time CM switch of the oscilloscope so that several pulses of the applied signal are displayed see Fig 2 11 Be sure the Variable T...

Page 28: ... the desired portion of the display to screen center and expand the sweep Fig 2 22 shows an expanded display of a pulsed RF signal The null point can be easily examined High Resolution Capabilities Figure 2 23 illustrates resolution capabilities of the Type 1L40 The DISPERSION is set to 1 kHz cm and the RESOLU TION is uncoupled and turned fully counterclockwise To increase the apparent resolution ...

Page 29: ...the graticule the swept oscillator frequency increases and the 75 MHz IF represents the conversion between the swept oscil lator frequency and a higher frequency portion of the wide band IF response Calibrated attenfuation in 1 dB steps to 51 dB is pro vided by the IF attentuator The signal output from the attenuator is then amplified and applied to the 3rd mixer stage where it is mixed with 70 MH...

Page 30: ...Fig 3 1 Type 1L40 Block Diagram CO K ISO 2 5 0 MHz 75 MHz Circuit Description Type 1L40 ...

Page 31: ... drift the phase detector output potential will change This change is amplified through Q860 Q870 and applied as a correc tive voltage to a voltage controlled capacitance diode in the oscillator tuned cirucit This shifts the phase of the oscillator so it remains phase locked to the reference frequency See Fig 3 3 and Fig 3 4 The corrective signal from the comparator and amplifier is also applied t...

Page 32: ...Circuit Description Type 1L40 10 V Fig 3 3 Phase Lock block diagram Input strobe pulses C D 3 4 Fig 3 4 Simplified phase detector circuit ...

Page 33: ...ifferentiated pulse to the phase detector as a push pull differential signal to gate the diode phase detector on and sample the oscillator signal The pulse generator consists of tunnel diode D826 transis tors Q820 and Q840 and associated circuit components The quiescent current of tunnel diode D826 is approximately 2 5 mA The positive going portion of the input signal switches the TD to its high s...

Page 34: ...dispersion accuracy The front panel DISP BAL R257 is then used to balance the center fre quency points of the MHz CM and kHz CM discriminators Sweep Oscillator The frequency of the oscillator is primarily a function of the inductance of L314 and the capacitance of D314 in the collector circuit of Q310 With an increase in back bias across capacitance diode D314 the capacitance of the diode decrease...

Page 35: ...sists of two matched diodes D373 and D376 at the input end of two transmission lines The transmission lines are 8 wavelength at the center frequency 275 MHz One line is open ended and appears capacitive the other line is shorted and appears inductive at the center frequency As the input frequency to the discri minator increases the transmission line input impedance approaches the characteristics o...

Page 36: ...DISPERSION SW220 selector positions DISP BAL adjustment R257 is a front panel IF center fre quency balance adjustment between the MHz CM and kHz CM dispersion positions Center Freq Cal adjustment R253 and CAL R252 calibrate the IF center frequency range of the IF CENTER FREQ control Wide Band 150 250 MHz Amplifier and Second Mixer The wide band amplifier contains an input 150 250 MHz bandpass filt...

Page 37: ... of the crystal is equivalent to a series tuned cir cuit with a very narrow bandpass1 see Fig 3 9 The bandwidth of the filter network is a function of the crystal output load which is primarily the parallel resonant circuit therefore bandwidth becomes a function of the Q for the resonant circuit The Q of the output load circuit for the crystal is varied by changing the bias of diode D506 which cha...

Page 38: ...full dynamic range required for the LOG diode circuit and a logarithmic dis play over the 6 cm graticule height In the LIN position the signal is attenuated by the voltage divider R606 R607 so an approximate 4 5 centimeter display provides approximately the same signal amplitude when the switch is changed to either of the other two positions In the SQ LAW position two germanium diodes D603 D604 ar...

Page 39: ...t voltage across D665 to turn this diode on and the two diodes now operate in series to extend the range of the Log circuit to at least 40 dB Video Filter switch SW661 switches capacitor C661 across the detector output to restrict the video bandwidth This pre vents high frequency components from distorting the display and enables easier evaluation of signal modulation when viewing signals with min...

Page 40: ...NOTES ...

Page 41: ...n grease No 325 or equivalent Do not over lubricate The necessary materials and instructions for proper lubrication of Tektronix instruments are contained in a component lubrication kit Tektronix Part No 003 0342 00 which may be ordered from Tektronix Inc The dial and tuning assembly should be lubricated periodi cally This is normally every 6 months however if the tuning shaft tends to bind or dra...

Page 42: ...uit 3 400 499 Narrow Band Amplifier 6 500 560 Variable Resolution Amplifier 7 600 727 Output Amplifier 8 800 890 Phase Lock Circuit 2 Resistor Color Code The instrument contains a number of stable metal film resistors identified by their gray background color and color coding If a resistor has three significant figures and a multi plier it will be EIA color coded If it has four significant figures...

Page 43: ...power source before attempting repair a n d o r replacement of any assembly or sub assembly Oscillator Assembly The oscillator assembly should not be removed or replaced until tests indicate the oscillator failure is due to a faulty tube or varactor Before removing the assembly check the supply voltages and the filament circuit for continuity The B f voltage is 150 V the filament supply is 10 V an...

Page 44: ...too much b Install probe assembly Part No 119 0107 00 into the No 1 port Fig 4 3 Position the probe assembly approximately u inch out from full penetration with the notch or keyway towards the plate end of the oscillator assembly and secure by tightening one of the two set screws c Install the Varactor assembly Part No 119 0105 00 into the control port Position the assembly approximately i4 inch o...

Page 45: ...4 Loosen 2 setscrews Do not intermix these with others 6 Pull tuning nuts straight out of cavity 7 Unsolder resistor from snap ring 8 Remove snap ring from each end 9 Remove choke assembly from each end 10 Push tube subassembly from cavity using 750 maximum O D X 6 5 min long tub ing Should have 375 min I D 4 5 Fig 4 4A Tube subassembly removal procedure ...

Page 46: ...resistor to snap ring lug 11 Install B end cap with 3 2 56 screws and solder resistor 12 Solder 2 filam ent wires to terminals on end cap and install w ith 3 2 56 screws 13 Install trimmer screw and locknut 14 Adjust both chokes to high frequency position 15 Tighten setscrews in readiness for alignment procedure 16 Loosen 2 56 setscrew on pinion gear Unit is now ready for alignment 4 6 Fig 4 4B Tu...

Page 47: ...dicated dial assembly to 4 0 GHz and lock the dial assembly to the oscillator tuning shaft b Tune the dial to indicate 1 5 GHz Adjust the trimmer screw 3 in Fig 4 3 for an oscillator frequency of 1 7 GHz c Repeat these steps until the oscillator frequency corresponds to the dial reading at both ends of the fre quency band d Check oscillator tracking through the frequency range Must track within 1 ...

Page 48: ...ve the instrument from the plug in oscilloscope 2 Unplug the signal lead J885 from the phase lock assembly 3 Loosen the set screw for the FINE RF CENTER FREQ control and remove the knob 4 Use a 5 u inch nut driver to remove the mounting nuts securing the front panel phase lock controls FINE RF FREQ LOCK CHECK and INT FREQ control Keep the nut for the INT REF FREQ control separate from the others b...

Page 49: ...to fill the notch with solder apply only enough solder to cover the wires adequately and form a small fillet Over filling the notches may result in cracked terminal strips Clip off the excess lead that extends beyond the soldered joint NOTE Some components can be damaged by heat A heat sink such as a pair of needle nose pliers hemostat or forceps between the component and the connection w ill prot...

Page 50: ...or control circuit capacitance and induc tance After repair the circuits of the instrument may need recalibration Removing and Replacing Switches Single wafers on the DISPERSION COUPLED RESOLUTION switches are not normally replaced If any of these wafers are defective the entire switch should be replaced Refer to the Electrical Parts List to find the unwired or wired switch part numbers CAUTION Wh...

Page 51: ...rms shown on the diagrams are not absolute and may vary between instru ments Most voltage measurement can be taken with a 20 000 ohms volt DC voltmeter Do not use a low volts range on a high impedance circuit Use a higher range or an oscil loscope with a 10X probe Accuracy of the voltmeter should be within 3 of all ranges Connections to the honeycomb chassis and the Phase Lock chassis are made thr...

Page 52: ...04 Q820 0 8 2 6 R658 R821 IQ 830JQ 800 i C829 C658 R829 R657 C828J E R820 C832 R656 R828 0 8 4 0 R800 C656 R843 0657 C844 Q650 ce45 j 8 8 4 6 8 4 5 f WR879 v R 8 7 8 C847 C651 D878 j D872 R887 R889 Coaxial Gry yel yel Shield D 8 5 7 B D856 C892 C890 C863 J855 4 12 Fig 4 11 Phase Lock and Recorder Detector circuit boards ...

Page 53: ...0 Q530 Q320 3510 C508 Q340 3350 C504 Q460 SW365 C384 Q440 r Q450 Q430 C425 Variable Resolution 1Q520 Sweeper and Discriminator Y501 Wide band IF Narrow band IF 4 13 Fig 4 12 Honeycomb assembly circuit and component layout ...

Page 54: ...NOTES ...

Page 55: ... sequence for a com plete calibration To check or adjust a section or circuit within the instrument turn to the desired portion of the procedure Start with the nearest setup if the check in the step or steps indicates the Type 1L40 is not within tolerance Adjustments that interact will be noted and the indicated interaction must be checked General To ensure instrument accuracy check the calibratio...

Page 56: ... MHz accuracy 1 calibrated variable output attenuator 0 to 120 dBm Hewlett Packard Model 608D 6 Constant Amplitude Signal Generator 1MHz to 10 MHz output amplitude IV to 5 V peak to peak Tektronix Type 191 Constant Amplitude Signal Generator 7 Step Attenuators 1 dB steps and 10 dB steps accuracy 1 5 dB to 90 dB below 1 GHz Hewlett Packard Type 355D and Type 355C Step Attenuators1 8 Optional Swept ...

Page 57: ...the oscilloscope compart ment b Turn the oscilloscope power on allow 20 minutes for the instrument to warm up at an ambient temperature of 25 C 5 C before making adjustments or checking the instrument to any given accuracies c Connect the oscilloscope Sweep Out or Sweep A connector to the analyzer SWEEP INPUT connector WARNING The sawtooth voltage can produce an electrical shock Insure that the ca...

Page 58: ...h the IF CENTER FREQ controls centered 000 the IF CENTER FREQ CAL must adjust the IF center fre quency to 200 MHz The DISP BAL adjustment must balance the IF center frequency shift to less than 2 cm between the MHz CM and KHz CM dispersion ranges a Equipment setup is shown in Fig 5 1 b Apply a 200 MHz signal 2nd harmonic of 10 ns from the Time Mark Generator Type 184 through a 20 dB attenu ator pa...

Page 59: ...nt p Return the DISPERSION selector to the 10 MHz position and adjust the Horizontal Position control to center the sweep on the graticule q ADJUST the Sweep Center R204 Fig 5 2 to position the 200 MHz signal to the graticule center line 2 A Check Dispersion Accuracy of M H z C M Ranges and Range of IF Center Frequency Control NOTE Dispersion accuracy is a measure of the frequency dispersion error...

Page 60: ...of the 1 is or 10 MHz markers then rotate the control to the other extreme position Dispersion accuracy and display linearity This marker This marker on graticule X cm on graticule Percent nonlinearity X 100 8 cm Fig 5 4 Measuring displersion linearity 2 B Adjust Frequency Dispersion and O Linearity When making a Performance Check only omit this step and proceed to step 3 A Dispersion accuracy and...

Page 61: ...Level con trol for a triggered display d Adjust the DISP CAL R208 for a 1 marker centimeter over the center 8 graticule divisions then adjust C358 Fig 5 2 for optimum display linearity e Repeat the adjustment of DISP CAL R208 and C358 until optimum dispersion accuracy and linearity are obtain ed If the dispersion linearity is not within tolerance a slight re adjustment of IF CF Range R290 and the ...

Page 62: ... Time Mark Generator Type 184 through a 20 dB attenuator 50 fl termination and the proper adapter to the RF INPUT connector Switch in 20 dB of IF Attenuation on the Type 1L40 Tune the RF CENTER FREQ control to minimize inter ference of the converted signals tunable signals c Set the DISPERSION RANGE to kHz CM position and the DISPERSION to 50kHz cm Uncouple the RESOLUTION and turn the control full...

Page 63: ...m signal amplitude e ADJUST L444 see Fig 5 7 for stable 70 MHz oscillator operation The stable point is midway between the two oscillator drop out points when the core of L444 is turned in and out through the operating range f Remove the P6041 probe adapter cable if connected and reconnect the coaxial cable to J100 g Set DISPERSION to 50 kHz cm and the RESOLUTION control fully clockwise Adjust the...

Page 64: ... 10 Typical displays when adjusting the resolution bandwidth with C610 C620 L624 and R543 I Adjust the bandpass of the 5 MHz filter as follows 1 ADJUST the 100 kHz Resol Cal R543 Fig 5 9 to obtain a bandpass between 100 kHz and 120 kHz at the 6 dB point Fig 5 6A 2 Switch the RESOLUTION control back one step from the fully clockwise position 3 ADJUST C610 C620 and L624 Fig 5 9 for a re sponse on th...

Page 65: ...y for correct bandwidth 5 Turn the RESOLUTION control one position counter clockwise dispersion 50 kHz cm readjust the GAIN if neces sary for a 6 cm display amplitude Check bandwidth These adjustments interact when properly set the resolution must vary from a bandwidth 100 kHz with the control fully clockwise to a bandwidth 1 kHz with the control turned fully counterclockwise Each step countercloc...

Page 66: ...ispersion Accuracy of kHz CM Ranges REQUIREMENT Dispersion accuracy must equal or ex ceed 3 a The equipment setup for this step is shown in Fig 5 11 b Apply 10 ns and 1 is markers from the Time Mark Generator Type 184 through a 40 dB attenuator pad 2 10X Attenuators 50 Q termination and proper adapter to the RF INPUT connector c CHECK the range of the IF CENTER FREQ control Fre quency range must e...

Page 67: ...idth adjustment step 3B 4 B Adjust kHz CM Dispersion O Control Settings For Calibration only a The equipment setup for this step is shown in Fig 5 11 A 1 m arker 2 centimeter Checking 500 kHz CM disper sion Center marker is 200 MHz feedthrough IB I morker centimeter Checking 100 kHz CM disper sion Fig 5 13 Typical displays when checking or adjusting kHz CM dis persion b Apply 10 ns and 1 is marker...

Page 68: ... CM 1 MHz Fully clockwise OFF Fully clockwise LIN As required Centered OFF Fully CCW Indicator Oscilloscope Time Cm 10 ms Triggering Line triggered sweep Horizontal Position Centered trace 5 Check Adjust Internal 1 MHz Phase Lock Reference Oscillator Operation REQUIREMENTS Frequency 1 MHz 0 1 with the Vari able control at the initial on position ccw position of the control but not in the OFF deten...

Page 69: ...race Amplifier Plug In Unit Type 1A1 and 1 s markers from the Time Mark Generator Type 184 through a 10X attenuator and a 50 V termination to Channel 2 Input of the Dual Trace Amplifier 2 Adjust the deflection sensitivity for both channels of the Dual Trace Amplifier to equalize the deflection ampli tude then set the Mode switch to Add 3 Set the test oscilloscope Time Cm to 1 ms and adjust the tri...

Page 70: ...izontal Position Centered trace 6 Check Adjust Phase Lock Operation Control Settings REQUIREMENT Local oscillator must phase lock through out its frequency range with the internal 1 MHz reference oscillator or to an externally applied signal within the fre quency range of 1 MHz to 5 MHz with an amplitude between 1 V and 5 V peak to peak a The equipment setup for this step is shown in Fig 5 16 b Co...

Page 71: ...R FREQ control is turned through the frequency range of the instrument f CHECK phase lock operation with an external reference frequency as follows 1 Apply a 1 V peak to peak 1 MHz signal from the Constant Amplitude Signal Generator Type 191 to the REF FREQ IN connector Use a BNC T connector to apply the input signal to the Type 1L40 and provide a convenient monitoring point for the test oscillosc...

Page 72: ...ANGE DISPERSION COUPLED RESOLUTION VIDEO FILTER GAIN VERTICAL DISPLAY IF ATTEN FINE RF CENTER FREQ INT REF FREQ Position a free running trace to the bottom line of the graticule Midrange 000 Centered kHz CM 500 kHz OFF Midrange LIN Switches off Centered OFF Indicator Oscilloscope Time Cm 10 ms Triggering Adjusted for a free running sweep Horizontal Position Centered trace 7 Check Accuracy of IF At...

Page 73: ... switch ON RF Generator Attenuator Control Setting 2 dB 58 dBm 2 dBm 4 dB 56 dBm 4 dBm 8 dB 52 dBm 8 dBm 16 dB 44 dBm 1 6 dBm 20 dB 40 dBm 2 0 dBm 8 Check Adjust Dynamic Range of Vertical Display Modes a The equipment setup for this step is given in the alter native method portion of step 7 b Change the VERTICAL DISPLAY selector to LOG position and apply a 100 dBm 200 MHz signal directly from the ...

Page 74: ...ignal at the TO RECORDER output jack REQUIREMENT With the analyzer in LIN mode the output across a 600 L 2 load must equal or exceed 2 mV of signal per centimeter of display amplitude a Set up the equipment as shown in Fig 5 18 b Plug the test phone plug with a 600 fi load resistor across the terminals into the TO RECORDER jack Connect a IX probe from the test oscilloscope across the 600 S 2 resis...

Page 75: ...mpedance a Set up the equipment as shown in Fig 5 19 b Apply a 50 kHz signal from the Audio Signal Genera tor through a 50 Q Termination and BNC T connector to both the Type 1L40 Video INPUT connector and the vertical input of a DC coupled test oscilloscope c Turn the Type 1L40 GAIN control fully clockwise Adjust the Signal Generator output control for a signal amplitude of 4 cm on the indicator o...

Page 76: ...enerator for a signal amplitude of 4 cm on both oscillo scopes h Increase the frequency of the Signal Generator until the signal amplitude on the indicator oscilloscope decreases to 2 8 cm Maintain a constant 4 cm signal amplitude on the test oscilloscope i CHECK The frequency of the Signal Generator must equal or exceed 10 MHz j Remove the Signal Generator and the test oscilloscope from the Video...

Page 77: ...ery stable 200 MHz signal to accurately measure incidental FM and the Type 1L40 must be on a vibration free p la t form REQUIREMENT Incidental FM of the IF is not more than 200 Hz Incidental FM of the IF LO with phase locked operation at the local oscillator fundamental frequency is not more than 300 Hz a Equipment setup is shown in Fig 5 20 b Apply a 200 MHz signal from the Time Mark Generator 2n...

Page 78: ...just the MIXER PEAKING for maximum signal amplitude h Push the LOCK CHECK button and adjust the FINE R F CENTER FREQ control to phase lock the local oscillator Re lease the LOCK CHECK button and adjust the GAIN control for a full 6 cm signal amplitude i Decrease the DISPERSION to 1kHz cm keeping the phase locked signal within the graticule with the IF CENTER FREQ control j CHECK The amount of freq...

Page 79: ...just the MIXER PEAKING for maximum signal amplitude h Push the LOCK CHECK button and adjust the FINE R F CENTER FREQ control to phase lock the local oscillator Re lease the LOCK CHECK button and adjust the GAIN control for a full 6 cm signal amplitude i Decrease the DISPERSION to 1kHz cm keeping the phase locked signal within the graticule with the IF CENTER FREQ control j CHECK The amount of freq...

Page 80: ... IF CENTER FREQ controls centered is within 3dB within 50 MHz of the RF center fre quency to a frequency of 12 4 GHz and within 6 0 dB to 40 GHz a Equipment setup is shown in Fig 5 22 NOTE Display flatness check must be made with the MIXER PEAKING control adjusted for maximum signal amplitude for each display window b Apply the appropriate signal frequency from the re quired signal generator to ei...

Page 81: ...replaced Component replacement and recalibration requires special equipment and techniques therefore the analyzer should be returned to a Tektronix Field Repair Center for repair and calibration Contact your local Field Office or representa tive This procedure does not require a sweep generator to check flatness however if a sweep generator such as the Kay model 121C is available it may be used h ...

Page 82: ...RF Center Frequency Calibration System Sensitivity and Phase Lock Operation a Equipment setup is shown in Fig 5 24 b Apply a frequency and amplitude calibrated signal that is between 60 dBm and 30 dBm via the proper adapter to the RF INPUT connector NOTE When checking the sensitivity o f the 12 4 GHz to 40 GHz band apply the signal source to the W aveguide Mixer Connect the W aveguide Mixer to the...

Page 83: ...xtreme fre quency position of each scale TABLE 5 4 Suggested Signal Generator Refer to equipment list Frequency in GHz Scale Sensitivity Equal to or better than Dial Accuracy Check Frequency 100 kHz 1 kHz Hewlett Packard Model 8614A 1 5 2 5 4 0 1 90 dBm HOdBm 1 0 GHz Steps Hewlett Packard Model 8616A 3 8 2 80 dBm 1 0 0 dBm 2 0 GHz Steps Polarad Type 1107 6 0 8 2 Polarad Type 1108 8 2 10 0 3 7 5 dB...

Page 84: ... 5 26 b Install the Type 1L40 into the indicator Oscilloscope vertical compartment Connect a 50 Q termination via the proper adapter to the RF INPUT connector c Adjust the GAIN control for approximately 1 centimeter of noise level Adjust the MIXER PEAKING control for maxi mum signal amplitude then check across the frequency band for internal spurious signals Amplitude of any spurious signal should...

Page 85: ...NOTES ...

Page 86: ... PMC paper m etal cased EMT electrolytic m etal tu b u la r poly polystyrene c epsilon 2 71828 or o f error prec precision equal to or greater than PT paper tubular equal to o r less than PTM paper or plastic tu b u la r m olded ext external pw r pow er F o r f fara d Q fig u re o f m erit F 1 focus and intensity RC resistance capacitance FHB fla t head brass RF ra d io frequency FHS fla t head st...

Page 87: ...Part number instrument type or number serial or model 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 number X000 00 X 000 0000 00 Use 000 0000 00 O SPECIAL NOTES AND SYMBOLS Part first added at this serial number Part removed ...

Page 88: ...0039 00 0 001 mF Cer 500 V Cl 33 281 0635 00 1000 pF Cer 500 V Cl 36 281 0616 00 6 8 pF Cer 200 V Cl 37 281 0063 00 9 35 pF Var Cer Cl 38 281 0635 00 1000 pF Cer 500 V Cl 39 283 0039 00 0 001 ixF Cer 500 V Cl 40 283 0103 00 180 pF Cer 500 V 5 Cl 43 281 0635 00 1000 pF Cer 500 V Cl 45 281 0558 00 18 pF Cer 500 V Cl 46 281 0549 00 68 pF Cer 500 V 10 Cl 47 281 0523 00 lOOpF Cer 350 V Cl 48 283 0065 0...

Page 89: ...0005 ixF Cer 500 V 5 C367 283 0039 00 0 001 y tx F Cer 500 V C368 283 0003 00 0 01 mF Cer 150 V C373 283 0039 00 0 001 ixF Cer 500 V C376 283 0039 00 0 001 ixF Cer 500 V C383 283 0039 00 0 001 xF Cer 500 V C384 281 0105 00 0 8 8 5 pF Var Cer C385 281 0105 00 0 8 8 5 pF Var Cer C386 283 0039 00 0 001 xF Cer 500 V C401 283 0065 01 0 001 xF Cer 100 V 5 C412 283 0003 00 0 01 xF Cer 150 V C413 283 0039...

Page 90: ...0039 00 0 001 xF Cer 500 V C527 283 0003 00 0 01 ixF Cer 150 V C530 283 0003 00 0 01 ixF Cer 150 V C534 283 0003 00 0 01 ixF Cer 150 V C537 283 0003 00 0 01 ixF Cer 150 V C539 283 0003 00 0 01 ixF Cer 150 V C610 281 0099 00 1 3 5 4 pF Var Air C620 281 0105 00 0 8 8 5 pF Var Cer C623 283 0003 00 0 01 ixF Cer 150 V C626 283 0003 00 0 01 ilF Cer 150 V C651 283 0001 00 0 005 fxF Cer 500 V C656 283 000...

Page 91: ...iconductor Device Diodes D42 152 0272 00 Silicon Varicap 6 8 pF D240 152 0227 00 Zener 1N753A 0 4 W 6 2 V 5 D244 152 0061 00 Silicon Tek Spec D314 152 0231 00 Silicon Varicap MV1872 60 V 22 pF D334 152 0107 00 Silicon Replaceable by 1N647 D361 152 0153 00 Silicon Replaceable by 1N4244 D362 152 0185 00 Silicon Replaceable by 1N4152 D365 152 0153 00 Silicon Replaceable by 1N4244 D373 D376 153 0025 0...

Page 92: ... 131 0372 00 Coaxial J109 131 0372 00 Coaxial J120 131 0372 00 Coaxial J147 131 0372 00 Coaxial J148 131 0372 00 Coaxial J151 131 0372 00 Coaxial J188 131 0372 00 Coaxial J201 131 0106 00 1 Contact female J363 131 0372 00 Coaxial J370 131 0372 00 Coaxial J373 131 0372 00 Coaxial J376 131 0372 00 Coaxial J379 131 0372 00 Coaxial J401 131 0372 00 Coaxial J470 131 0372 00 Coaxial J501 131 0372 00 Coa...

Page 93: ...0 09 xH L313 108 0215 00 1 1 xH L314T L320 108 0215 00 1 1 xH L325 276 0507 00 Core Ferramic Suppressor L333 108 0215 00 1 1 ixH L343 108 0215 00 1 1 xH L348 108 0304 00 45 nH 1358 108 0372 00 27 nH L384 108 0374 00 55 nH L385 108 0374 00 55 nH L444 114 0207 00 180 220 nH Var Core 276 0506 00 1446 108 0215 00 1 1 xH L450 3 276 0507 00 Core Ferramic Suppressor L456 276 0507 00 Core Ferramic Suppres...

Page 94: ... on a 1 kn AW resistor Plugs PH 131 0017 00 16 Contact male P60D Transistors Q120 151 0230 00 Silicon Replaceable by 40235 RCA Q130 151 0230 00 Silicon Replaceable by 40235 RCA QUO 151 0181 00 Silicon 40242 RCA Q230 151 0155 00 Silicon Replaceable by 2N2925 Q240 151 0150 00 Silicon Selected from 2N3440 Q260 151 0104 00 Silicon Replaceable by 2N2919 Q280 151 015S00 Silicon Replaceable by 2N2925 Q29...

Page 95: ... Resistors are fixed composition 1 0 unless otherwise indicated R42 308 0217 00 5 5 kft 5 W W W 5 R4310 R47 308 0258 00 6 kft 3 W W W 5 R49 308 0395 00 300 n 10W W W R66 311 0546 00 10 kft Var R123 315 0101 00 io o a A W 5 R124 315 0471 00 470 n A W 5 R128 315 0332 00 3 3 kn A W 5 R130 315 0221 00 220 ft A W 5 R133 315 0101 00 100 ft A W 5 R134 315 0131 00 130ft A W 5 R137 315 0330 00 33 ft nomina...

Page 96: ... 2 49 k a AW Prec 1 R214 321 0164 00 499 a W Prec 1 R215 321 0193 00 l k a w Prec 1 R217 321 0164 00 499a W Prec 1 R219 321 0135 00 249 a W Prec 1 R220 321 0068 00 49 9 0 w Prec 1 R221 321 0097 00 ioo a W Prec 1 R223 321 0068 00 49 9 a w Prec 1 R224 321 0047 00 30 1 a W Prec 1 R225 321 0001 00 10a W Prec 1 R226 321 0001 00 10a a w Prec 1 R230 315 0512 00 5 1 ka A W 5 R236 303 0513 00 51 ka 1w 5 R2...

Page 97: ... k n y2w Prec 1 R293 315 0510 00 5 i n A W 5 R294 316 0562 00 5 6 k n w R295 315 0202 00 2 k n A W 5 R296 316 0102 00 l k n A W R300 315 0102 00 i k n A W 5 R310 315 0562 00 5 6 k n A W 5 R311 315 0392 00 3 9 k n A W 5 R316 315 0221 00 220 n A W 5 R333 321 0233 00 2 61 k n s W Prec 1 R334 315 0431 00 430 n A W 5 R346 315 0680 00 6 8 n A W 5 R356 315 0680 00 68 n A W 5 R361 321 0395 00 127 k n W Pr...

Page 98: ...532 315 0562 00 5 6 k a A w 5 R534 315 0102 00 l k a A w 5 R537 315 0101 00 l o o a A w 5 R539 315 0102 00 l k a A w 5 R540 301 0433 00 43 k a A w 5 R541 315 0204 00 200 k a A w 5 R543 311 0326 00 10 k a Var R550 315 0151 00 150 a A w 5 R551 315 0161 00 160 a A W 5 R552 315 0111 00 n o a A W 5 R553 315 0151 00 150 a A W 5 R554 315 0331 00 330 a A W 5 R555 315 0511 00 5 i o a A W 5 R556 315 0561 00...

Page 99: ... A w 5 311 0091 00 1 k n Var 303 0123 00 12 k n 1w 5 316 0471 00 470 n A W 316 0471 00 470 n A W 323 0419 00 226 k n y w Prec 1 321 0288 00 9 76 k n w Prec 1 316 0103 00 io k n A W 321 0289 00 io k n w Prec 1 321 0284 00 8 87 k n w Prec 1 301 0154 00 150 k n W 5 308 0020 00 3 k n 1 0 W W W 5 317 0562 00 5 6 k n w 5 317 0472 00 4 7 k n w 5 317 0102 00 l k n w 5 315 0104 00 lo o k n A W 5 317 0473 0...

Page 100: ...0 ioo kn V e W Prec 1 R865 321 0279 00 7 87 kn V e W Prec 1 R866 317 0203 00 20 kn V e W 5 R868 317 0621 00 620 n V e W 5 R869 317 0103 00 io kn V e W 5 R871 315 0124 00 120 kn A W 5 R872 317 0302 00 3kn e W 5 R873 317 0472 00 4 7 kn V e W 5 R874 321 0385 00 ioo kn e W Prec 1 R876 317 0471 00 470 n Vs w 5 R878 317 0682 00 6 8 kn e W 5 R879 317 0302 00 3kn e W 5 R880 317 0104 00 ioo kn e W 5 R881 3...

Page 101: ... 00 Toroid 5 turns bifilar T148 120 0325 00 Toroid 5 turns bifilar T330 120 0340 00 Toroid 5 turns bifilar T331 120 0340 00 Toroid 5 turns bifilar T343 120 0340 00 Toroid 5 turns bifilar T347 120 0340 00 Toroid 5 turns bifilar T354 120 0340 00 Toroid 5 turns bifilar T363 120 0340 00 Toroid 5 turns bifilar T424 120 0425 00 Toroid 5 turns 1 turn T434 120 0426 00 Toroid 7 turns 2 turns T454 120 0356 ...

Page 102: ...7016 W37516 W500 175 0358 00 Y440 158 0024 00 Y501 158 0019 00 Y610 158 0027 00 Y800 158 0025 00 119 0100 00 610 0172 00 119 0096 00 119 0108 00 119 0091 00 Selected See Mechanical Parts List 9 inch 2 inch 3 inch 1 9 16 inch 8 inch 1 9 16 inch Crystals 70 MHz 5 MHz 5 MHz 1 MHz Diplexer Multiplexer IF dual hybrid Low Pass Filter 280 MHz Mixer 1 5 12 4 GHz Oscillator Oscillator 1 dB Pad Attenuator P...

Page 103: ......

Page 104: ... next higher indentation 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 improvem...

Page 105: ...Mechanical Parts List Type 1L40 INDEX OF MECHANICAL PARTS LIST ILLUSTRATIONS Located behind diagrams Fig 1 FRONT REAR Fig 2 IF CHASSIS PHASE LOCK ASSEMBLIES Fig 3 STANDARD ACCESSORIES ...

Page 106: ...t included w resistor LOCKWASHER internal 0 261 ID x 0 400 inch OD WASHER flat I D x inch OD NUT hex y4 32 x 5 u inch KNOB charcoal DISPERSION RANGE knob includes SCREW set 5 40x0 125 inch HSS ROD shaft CAM control actuator cam includes SCREW set 4 40 x 3 u inch HSS COUPLING shaft coupling includes SCREW set 4 40 x 3 33 inch HSS SWITCH unwired DISPERSION RANGE mounting hardware not included w swit...

Page 107: ...32x 7i 5 inch KNOB charcoal MIXER PEAKING knob includes SCREW set 6 32 x 3 8 inch HSS RESISTOR variable mounting hardware for each not included w resistor WASHER flat 4 ID x inch OD NUT hex V4 32 x 5 t8 inch KNOB charcoal GAIN knob includes SCREW set 6 32 x 3 u inch HSS DIAL w brake IF CENTER FREQ dial includes SCREW set 4 40 x y8 inch HSS RESISTOR variable w hardware RESISTOR variable mounting ha...

Page 108: ...r V4 ID x 7 1 6 inch OD SE 56 210 0471 00 1 NUT hex V4 32 x 5 u inch 57 358 0054 00 1 BUSHING 4 3 2 x 3 32 inch 58 366 1098 00 1 KNOB charcoal FINE RF CENTER FREQ knob includes 213 0153 00 1 SCREW set 5 40 x inch HSS 59 366 1099 00 1 KNOB charcoal PHASE LOCK INT REF FREQ knob includes 213 0153 00 1 SCREW set 5 40 x inch HSS 60 386 1448 00 1 PLATE subpanel front 61 366 0125 00 1 KNOB plug in securi...

Page 109: ...CREW 2 56 x 3 1 S inch RHS NUT hex 2 56 x 3 w inch LUG solder SE 6 mounting hardware not included w lug SCREW 6 32 x V4 inch NUT hex 6 32 x inch RESISTOR mounting hardware for each not included w resistor SCREW 6 32 x 1V2 inches RHS EYELET NUT hex 5 i x 21 32 inch long SCREW 6 32 x s 1 5 inch PHS RESISTOR mounting hardware not included w resistor SCREW 6 32 x inch THS EYELET NUT hex 5 6 x 21 32 in...

Page 110: ...PACITOR variable w hardware BRACKET coil mounting mounting hardware not included w bracket SCREW thread forming 4 x V4 inch PHS RESISTOR variable mounting hardware for each not included w resistor LOCKWASHER internal 0 261 ID x 0 400 inch OD NUT hex 4 32 x 5 4 inch BUSHING y4 32 x 3 32 inch COIL mounting hardware not included w coil ROD spacer x inch LUG solder DE 6 LUG solder SE 4 SCREW 4 40 x 3 ...

Page 111: ... w strip SPACER plastic 0 281 inch long STRIP ceramic 7 S inch h w 4 notches strip includes STUD plastic mounting hardware not included w strip SPACER plastic 0 406 inch long SHIELD tube 7 8 ID x 13 inch h w spring ASSEMBLY oscillator dial tape assembly includes OSCILLATOR BOARD circuit mounting hardware not included w board SCREW sems 6 32 x inch PHB TUBE spacer 0 180 ID xV 4 inch OD PIN connecto...

Page 112: ...____ ASSEMBLY dial tape assembly includes GEAR ROD sprocket WASHER spacer plastic 0 265 ID x 0 437 inch OD WASHER plastic 0 130 ID x 0 375 inch OD SPROCKET tape mounting hardware not included w sprocket SCREW set 4 40 x 3 32 inch HSS ROLLER idler tape mounting hardware for each not included w roller ROD idler standoff HOUSING housing includes PIN roll TAPE dial BUSHING mounting hardware not includ...

Page 113: ...ATOR dB SHIELD switch mounting hardware not included w assembly NUT hex 1 4 40x 5 i inch ASSEMBLY BANDPASS FILTER assembly includes CONNECTOR coaxial w hardware LUG solder SE 10 CAPACITOR mounting hardware for each not included w capacitor FASTENER plastic STRIP terminal SHIELD filter CHASSIS mounting hardware not included w assembly SCREW 4 40 x 3 u inch PHS ASSEMBLY sweeper assembly includes CON...

Page 114: ...ead forming 2 56 x 3 w inch PHS COIL mounting hardware not included w coil ROD spacer x inch LOCKWASHER internal 4 SCREW 4 40 x 4 inch PHS HOLDER toroid mounting hardware for each not included w holder SPACER plastic s 32 inch long SWITCH toggle DISPERSION RANGE mounting hardware not included w switch WASHER key 0 255 ID x 0 375 inch OD NUT hex y4 4 0 x 5 M inch BOARD connector board includes PIN ...

Page 115: ...1 NUT hex 3 8 32 x 2 inch 55 1 RESISTOR variable mounting hardware not included w resistor 56 210 1078 00 1 LOCKWASHER internal 0 290 ID x 0 500 inch OD 57 210 0583 00 1 NUT hex 4 32 x 5 u inch 58 260 0689 00 1 SWITCH push LOCK CHECK mounting hardware not included w resistor 59 210 0223 00 1 LUG solder 1 ID x 7 u inch OD SE 60 210 0583 00 1 NUT hex y4 32 x s u inch 61 1 RESISTOR variable mounting ...

Page 116: ...included w shield 210 0935 00 1 WASHER fiber 0 140 ID x 0 375 inch OD 84 210 0909 00 1 WASHER mica 0 196 ID x 0 625 inch OD 85 210 0457 00 1 NUT keps 6 32 x 5 w inch 86 213 0138 00 6 SCREW sheet metal 4 x 3 w inch PHS 87 610 0172 00 1 ASSEMBLY LOW PASS FILTER 280 MHz mounting hardware not included w assembly 88 210 0586 00 2 NUT keps 4 40 x 4 inch 89 407 0563 00 1 BRACKET component mounting hardwa...

Page 117: ...I ...

Page 118: ...jor division represents one cm Voltages and waveforms on the schematics shown in blue are not absolute and may vary between instruments Any apparent differences between voltage levels measured and those shown on the waveforms may be due to circuit loading of the measuring device The waveforms were obtained using a Type 545B Oscilloscope 10X probe and a Type 1A 1 The system characteristics are as f...

Page 119: ...T Y P E I L 4 0 S F t C T R U M A N A U V t R A ...

Page 120: ...L R O G 8 R F P H A S E L O C K D I A G R A M A ...

Page 121: ...r Sweeper Cir cuits diagram where control set ting is noted above waveform RESOLUTION Fully CCW VIDEO FILTER OFF GAIN Adjusted for full screen display VERTICAL DISPLAY LIN IF ATTEN Switches off FINE RF CENTER FREQ Centered INT 1 MHz R EF FREQ On MIXER PEAKING Fully CCW Oscilloscope Time Cm 10 ms Triggering Adjusted for a free running sweep Horizontal Position Centered trace ...

Page 122: ...4 0 IF CF RANGE i VARIABLE RESOLUTION CIRCUIT 0510 0520 0550 2 R F AMPLITUDE COMPARATOR 020 0 Q290 LO O 0 4 0 S MM AMPLIFIERS _ V620 0 5 0 Y6I0 tS r i Tcaim 1 01WMS1OW SWLLP SWEPT OSCILLATOR SWEPT FREQ s w is o 0 L 3 0 0 2 40 0514 0310 QS20 Q 340 035 0 SW B A R MECHANICALLY W ITH SW 2 3 0 CENTER FREQ 5 REFERENCE D1AGR4 5 W IDL BANO SWEEPER ClR IF ATTENUAT n ar r o w b a n c 70M M x OSCIL VARIABLE ...

Page 123: ... ITH BW 2 SO P ll REFERENCE DIAGRAMS WIDE BAWD AMPLIFIER t MIXER SWEEPER CIRCUITS IF A TTE N U A TO R NARROW BAWD IF AMPLIFIER 70M M x OSCILLATOR 4 MIXER VARIABLE RESOLUTION CIRCUITS OUTPUT A M P LIFIE R ict e IF SYSTEM BLOCK DIAGRAM A ...

Page 124: ... 75V T Y P L I L A Q S P f c C T R U M A N A L Y Z t R ...

Page 125: ... L T E R 2 2 5 V R E F l R f c N C D I A G R A M S P H A S E L O C K C I R C U I T W I D E B A N D A M P L I F I E R M I X E R 8 O U T P U T a m p l i f i e r 5 5 N A L c G R Q 8 7 0 A 1 O 0 R F 5 U T I O N O J I O O MHz ...

Page 126: ... T y p t S P E C T R u M A N A U V 2 f e R A ...

Page 127: ...4 A P H A S t L O C K C I R C U I T ...

Page 128: ...iv r AMPUH19 1 rRon J9A 4 T Y P E L 4 0 S P E C T R U M A N A L Y Z C R A I ...

Page 129: ...1ST AMPUFtU r t a m plifier MIXER ov SEE PARTS UST FOR SEMICONDUCTOR TYPES DENOTES LO SSY O O A y loze a W ID E B A M D A n P L I F I E R A ND n i X E R ...

Page 130: ......

Page 131: ...S T F O R 5 U 3 P O R S Q U A R E P N S E M I C O N D U C T O R T Y P E S C O X I K i l c T t O K I D E T A I L 3 A H 0 3 S Y C O A X S E L E C T E D c OR B E S T L I W E A R i T Y O r D i S C R i M N A T G R S W E E P E R C IR C U IT l l ...

Page 132: ...x I F BIG W AL F on J A 1 V ClSl L C 6A f i l t u r e f e r e h c s d i a g r a m s 9 W iD L BAND A M P L IF IE R M IX LR 6 NARROW BAWD I F AMPLIFIER N lO M W t OSCILLATOR MIXER D E N O T E L O S S Y C O A X T Y P E I L 4 0 SPECTRUM ANALYZER A ...

Page 133: ... IF ATTEW de 1 C 151 LI5I C I52 ci 7 V 185 C 168 FORM A LOW PASS FILTER CHARACTERISTIC I F 1068 ATTENUATOR ...

Page 134: ... IS MHZ IP lO M Hx OSCILLATOR r T Y P E IL 4 0 SPECTRUM ANALYZED ...

Page 135: ... lL I z 5 a or lJ ui Ul X i u tt O a i d id u it l h 5 12 2 a or PO S 3 J3 ...

Page 136: ... INPUT 200 MWi SIGNAL AMPLITUDE AND RESOLUTION CONTROL SETTING WILL EFFECT WAVEF ORM AMPLITUDES T Y P E I L 4 0 S P E C T R U M ANALYZER A ...

Page 137: ...RAMS S W ID E B A N D A M P L IF IE R M lX L R MARROW BANJO IF A M P L IF IE R 7 0 M H z O S C ILLA T O R t M IX E R OUTPUT AMPLIFIER 5 5 f t k 0 S S 6 ifcC RS57 lOOK LIO O V R C K 33B 30 1 io z e VARIABLE RESOLUTION CIRCUITS ...

Page 138: ...AND IF AMPLIFIER v 70MHx OSCILLATOR MIXER 7 VARIABLE RESOLUTION CIRCUITS DECOUPLING NETWORKS IN T H E OSCILLOSCOPE CAUSE SEVERAL O F HE 6 AND S SUPPLIES C READ SEVERAL VOLTS LOW TRi IS NORMAL AND DOES NOT INDICATE TROUBLE IN THE A N A LY Z E R TO OSCILLATOR T Y P E IL 4 0 S P E C T R U M ANALYZER ...

Page 139: ...DETECTORS i 4 1066 OUTPUT AMPLIPIER ...

Page 140: ...FIG 1 FRONT REAR TYPE 1L40 SPECTRUM ANALYZER ...

Page 141: ...FIG 2 IF CHASSIS PHASE LOCK AS 6 1 ...

Page 142: ...F CHASSIS PHASE LOCK ASSEMBLIES TYPE 1L40 SPECTRUM ANALYZER ...

Page 143: ...o Tektronix Part No S erial M odel No Eff Disc Q t y Description 1 2 3 4 5 3 1 134 0052 00 l PLUG red 2 012 0091 00 i CORD patch BNC to banana red 18 inches long 3 134 0076 00 l PLUG protector 070 0904 00 2 MANUAL instruction not shown TYPE 1L40 SPECTRUM ANALYZER ...

Page 144: ...it and component improvements to our instruments as soon as they are developed and tested Sometimes due to printing and shipping require ments we can t get these changes immediately into printed manuals Hence your manual may contain new change inform ation on follow ing pages If it does not your manual is correct as printed ...

Page 145: ......

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