Codan 2110 series, Руководство по ремонту

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Repair procedures, tests, and adjustments
72 Manpack Transceiver 2110 series Repair Guide
Performing the Low Power test
To test the low output power of the transceiver:
1
Set up the equipment (see page 56, Setting up the test equipment ).
1
Press
Tx PWR
until
Lo
is selected.
1
Select any frequency between 4 and 6 MHz.
1
Switch on PTT on the 0208.
1
Adjust the output level of the 0208 until the RF output power of the transceiver stops
increasing, then increase the output level of the 0208 by 10 dB.
1
Record your results and actions (see page 109, Test sheet for the 2110 series
Manpack Transceiver ).
1
For each band, adjust the output level of the 0208 until the RF output power of the
transceiver stops increasing, then increase the output level of the 0208 by 10 dB.
1
Record your results and actions (see page 109, Test sheet for the 2110 series
Manpack Transceiver ).
1
Switch off PTT on the 0208.
1
Press Tx PWR until Hi is selected.
1
Return to the Repair flowchart (see Figure 29 on page 95 ).
Pass A reading on the RF power meter that is between 4 and 5 W PEP.
NOTE
Equivalent readings for power meters without PEP and dB scales are
listed in
Table 17 .
Table 17: 4/5 W output power scale
PEP
(W)
PEP
(dBm)
Variation from 5 W
(dB)
RMS responding
meter
(W)
Average responding
meter (Bird 43)
(W)
V p–p
4 36.0 –1.0 2 1.6 40
5 37 0.0 2.5 2 45
Pass A reading on the RF power meter that is between 4 and 5 W PEP for
each band.
NOTE
Equivalent readings for power meters without PEP and dB scales are
listed in
Table 17 .
NOTE
The V p–p reading is directly across the 50

load. The 0208 Test Set
gives a sampled output.