Chapter 3: Service & maintenance
Diagnostics 69
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Self Test
Two different self tests are available:
• Tx single-band transmission test
• Tx multi-band transmission test
The Tx single Band test performs a tone transmitter test on the current TX
frequency shown in the display.
The output of this test is the transmitted power and the battery voltage.
Note that the output power is not calibrated, so the power figure may only
be used as a guideline. The battery voltage should not drop significantly
during this test, as this indicates a poor installation (e.g. thin wires, etc.)
The Tx Multi Band test is similar to the single band test. However, this test
automatically transmits on the channel next to all six distress SSB
frequencies:
• 2182+3 kHz
• 4125+3 kHz
• 6215+3 kHz
• 8291+3 kHz
• 12290+3 kHz
•16420+3 kHz
If you exit the test before it is finished, a system status message will not be
added to the diagnostics log.
ATU st atus
In the ATU status menu the following items are present:
• ATU software version
• ATU Selftest response in the format 0x00. This code should be
mentioned if any service inquiries regarding output power or antenna
tuner are made
This test transmits a short test signal at full power — the radio
operator needs to verify that the channel is free from any traffic
before starting the test!
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