6.1 Self-test
6-8
TXFIL
Forward voltage, Vf is measured by a VSWR detector in input and output circuits on
TX FIL board (05P0736). If Vf is within ratings, “OK” appears.
The test signal includes 2190 kHz, 3000 kHz, 4200 kHz, 6200 kHz, 8200 kHz, 12400
kHz and 22000 kHz to check all bandpass filters. The power data of 90 is used on
FS-1570 and FS-2570.
Fig.6.1.7 TX FIL VSWR detector
COUPL
Antenna coupler, AT-1560 is tested. Connecting dummy (10 ohm+250 pF), 2190 kHz
test signal is sent to the coupler. If TUNE OK signal is detected and the antenna current,
IA is more than the rated value, “OK” appears. TUNE circuit is tested with power data
of 90 (TUNE POWER) and IA is measured with 110 on FS-1570 and FS-2570.
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