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12 MAINTENANCE & TROUBLESHOOTING
12-12
Tone test 2 (Fox)
This test (continuously) checks for proper transmission of the test message THE QUICK
BROWN FOX JUMPS OVER THE LAZY DOG 0123456789. To conduct the test, call a
station by using the ARQ or FEC mode.
Tone test 3 (Beta)
You may check for proper transmission of the idle signal β. Call up a station using the
ARQ mode.
Tone test 4 (Mark)
This test outputs the mark signal through the LINE OUT terminal, where a frequency
counter may be connected, to confirm its frequency (1615 Hz).
Tone test 5 (Space)
Tone test 5 verifies the space signal frequency (1785 Hz).
Tone test 6 (BY)
This test verifies the frequency of the space B (1785 Hz) and the mark Y (1615 Hz), using
a spectrum analyzer.
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