Tektronix 1L40, Инструкция по эксплуатации

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Performance Check/Calibration— Type 1L40
[~] 7. Check Accuracy of IF Attenuator dB (Page 5-18)
Selectors
|~1 8. Check Dynamic Range of Vertical Display (Page 5-19)
Modes
Q 9. Check Attenuation Range of IF G A IN (Page 5-20)
Control
|~l 10. Check Amplitude of Signal at RECORDER (Page 5-20)
Output Jack
F~| 11. Check Frequency Response of the Video (Page 5-21)
Circuit
Q 12. Check Incidental Frequency Modulation (Page 5-23)
□ 13. Check/Adjust Response Flatness of RF (Page 5-25)
Mixer and W ide Bank IF Am plifier
Adjust LI 47, C l37 and LI34
□ 14. Check RF Center Frequency Calibration, (Page 5-27)
System Sensitivity and Phase Lock Operation
□ 15. Check Presence of Spurious Signal (Page 5-29)
Recommended Equipment
The following equipment or its equivalent is recommended
for calibrating the Type 1L40. The specifications listed are
the minimum necessary for accurate calibration, therefore
some of the equipment specifications may better the figures
given. Substitute equipment must meet or exceed the mini­
mum specifications given. Proper control settings and equip­
ment setup for substitute equipment must be determined by
the calibrator.
Special calibration fixtures are also listed to facilitate
calibration. These fixtures are available from Tektronix, Inc.
Order by part number through your local Tektronix field
O ffice or representative.
1. Indicator Oscilloscope: Oscilloscope with a 6 cm
vertical display that w ill accept the Type 1L40 Spectrum
Analyzer. This oscilloscope should be the one the Type 1L40
being calibrated w ill be used with. The front panel adjust­
ments w ill require readjustment if the analyzer is changed to
another oscilloscope. A Type 545B Osciloscope is used in this
procedure.
2. Test Oscilloscope and Vertical Plug-In unit with both IX
and 10X probes; minimum sensitivity 0.005 V/cm; frequency
response DC to 30 MHz. Tektronix 540-series Oscilloscope
with Type 1A1 Plug-In Unit and Tektronix P6006 (10X) and
P6011 (IX) test probes.
3. Time-Mark Generator: Marker outputs, 0.5 s to 0.1
/is
and frequency outputs of 20 MHz, 50 MHz, 50 MHz; accuracy
0.001%. Tektronix Type 184 Time-Mark Generator.
4. Audio Signal Generator: Frequency range 10 Hz to 1
MHz, variable output amplitude to at least 10 volts peak to
peak, accuracy ± 3 % . General Radio Model 1310A or
Hewlett-Packard Model 241 A.
5. VHF Signal Generator: Frequency range 10 MHz to 400
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 I V 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-Frequency Generator: frequency range
130 MHz to 280 MHz, with amplitude variation < 0 .2 5 d B .
Kay Type 121C Sweep Generator. (May be used to check
IF bandpass response flatness).
9. Two 10:1 Attenuators: Tektronix Part No. 011-0059-00.
10. 20 dB RF Attenuator, Tektronix Part No. 011-0086-00.
11. Termination, 50 SI, BNC, Tektronix Part No. 011-0049-
00.
12. BNC T connector; Tektronix Part No. 103-0030-00.
13. Adapter, BNC female to N male; Tektronix Part No.
103-0045-00.
14. Adapter, BNC female to BNC female; Tektronix Part
No. 103-0023-00.
15. Minature phone plug with 600 Q load. (Test fixture to
check TO RECORD signal amplitude.) Consists of a 600 S’ , 5%
% watt resistor, soldered across a miniature phone plug. To
be obtained locally.
16. Adapter. Sealectro to BNC, Type P6041 probe cable,
Tektronix Part No. 010-0164-00.
17. Two BNC, coaxial cables, 50 Q. Tektronix Part No.
012-0057-01.
18. Patch cord with BNC to banana plug tips. Tektronix
Part No. 012-0091-00.
19. Flexible Cable Plug-In Extension. Tektronix Part No.
012-0038-00.
20. RF Signal Generators2, with calibrated frequency and
output power: Frequency range 1.5 GHz to 40 GHz, accu­
racy ± 1 % ; output power — 100 dBm to — 30 dBm, accuracy
± 1 dB; output impedance 50 0 . Suggested equipment:
Hewlett-Packard 8614A UHF Signal Generator, 800 MHz to
2400 MHz.
Hewlett-Packard 8616A UHF Signal Generator, 1800 MHz
to 4500 MHz.
Polarad 1107 Microwave Signal Generator, 3.8 GHz to
8.2 GHz.
Polarad 1108 Microwave Signal Generator, 6.95 GHz to
11.0 GHz.
‘The low value IF A tte n u a to r dB selectors are checked at the factory
to insure they are a ll w ith in the i O . 1 d B /d B specification before
being shipped. A ny change in tolerance w ill be a larg e change
resulting from component fa ilu re , therefore tigh t-tole rance step a t­
tenuators are not norm ally required in the Performance Check or
C a lib ra tio n Procedures. If, however, it is desired to check the exact
attenua tion error o f the dB step selectors, then the recommended
step attenuators must be accurately calibrated by the user or manu­
facturer, or a step attenuator having more rig id specifications must
be used.
'S ignal Generator (s) depend on frequency range o f instrument.
5-2