Section V Models 78100A, 78101A
Maintenance
A
TP5 WITH NO ATTENUATION
SCOPE SETUP FOR
BOTH WAVEFORMS:
Sensitivity 0.01 V/cm
Sweep 0.2 mS/cm
Probe X 50
TP5 WITH 80 dB ATTENUATION FROM
TEST BOX
Figure 5- ll. Intermediate Frequency Waveforms
5-35. Compensatory Adjustment References. c. If a receiver low frequency board is exchanged, per-
form receiver tests found in paragraphs 5-5 1 through 5-69;
5-36. After components are replaced, adjustments are to if individual components are replaced, refer to Table 5-5
be made to the PC Boards according to the following sched- for a list of compensatory adjustments.
ule
5-37. TRANSMITTER TESTS AND ADJUSTMENTS.
a. If a transmitter board is exchanged, it is necessary to
perform all the adjustments as described in the Transmitter 5-38. The following tests, when complete, will assure that
Service Test Procedure. If components only are replaced, the Model 78 lOOA Transmitter meets Federal Communica-
refer to Table 5-3 for an index to the compensatory adjust- tions Commission requirements for frequency and modula-
ments. tion. The transmitter?s INOP and GAIN parameters are
measured when adjusting the corresponding 78 101 A
b. If a receiver high frequency board is exchanged, per- Receiver controls to establish system performance. There-
form receiver tests found in paragraphs 5-5 1 through 5-69; fore, before a given receiver and transmitter can be mated
if individual components are replaced, refer to Table 54 for use as a system, the ?INOP Adjust and ECG Gain? por-
for a list of compensatory adjustments. tions of the 78101A Receiver tests must be performed.
5-16 078 100-2 |
ACEC
