TM 11-6625-2781-14&P-2
Section V
sections. The connectors on the cable are keyed by the
5-21. RF Section Adjustments. Perform the display
shape of the plug and the arrangement of the pins.
and IF section adjustments prior to performing the
Press the connectors firmly together and extend the
following RF section adjustments:
instruments as far apart as the cable will allow without
putting stress on the connectors. Remove Dummy Load
a. First Converter Circuits.
Assembly A14 from rear panel of display section and
install at P4 on rear of RF section.
1. First Local Oscillator Adjustment (Para.
5-15. FACTORY SELECTED COMPONENTS
2. Tuning Range Adjustment (Para. 5-23).
3. 200 MHz IF Bandpass Adjustment (Para.
components by reference designation, basis' of
selection, and schematic diagram location on which the
component is illustrated. Factory selected components
b. 150 MHz Oscillator Adjustment (Para. 5-25).
are. designated by an asterisk (*) on the schematic
diagrams in Section VIII of this manual.
c. 120 MHz
Low
Pass Fil ter Check and
Adjustment (Para. 5-26).
5-17. RELATED ADJUSTMENTS
5-18. The following sets of adjustments are directly
d. Tuning Stabilizer Circuits
related. When one adjustment in a set is made, the
1. 100 kHz Reference Oscillator Check
others in that set should be checked.
2. APC Sampler Adjustment (Para. 5-28).
5-19. Display Section Adjustments . Refer to the
3. APC Search Oscillator Checks (Para.
Display Section Operating and Service Manual.
4. APC 100 kHz Rejection Adjustment (Para.
5-20. IF Section Adjustments . Refer to the IF Section
Operating and Service Manual.
5. APC Tuning Stabilizer Final Check (Para.
Table 5-1. Recommended Test Equipment
Item
Minimum Specifications or Required Features
Suggested Model
Frequency Comb
Frequency markers spaced 1, 10, 100 MHz apart; usable to
HP 8406A Comb
Generator
110 MHz
Generator
Frequency Accuracy: +0.01%
Output Amplitude: >-60 dBm
HF Signal Generator
Frequency Range: 1-50 MHz
HP 606A/B
Output Amplitude: -30 dBm
HF Signal
Output Amplitude Accuracy: -1%
Generator
Frequency Accuracy: 1%
Output Impedance: 50 ohms
Tracking Generator
Frequency Range: 1-110 MHz
HP 8443A
Output Flatness: 0.5 dB over full band
Tracking
Output Impedance: 50 ohms
Generator
Output Amplitude: at least 0 dBm
Counter
(Do not substitute)
5-2
