Avtech CSD-714 Selcal Руководство по установке - Страница 8

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CSD-714 Installation and Operation Manual

OPERATION

Pilot operation of the CSD-714 is limited to resetting it after a call and performing a self-test.

Normal Operation

There are several installation options concerning how the annunciator lamps and audio

annunciation work, as well as how the unit is reset after a call. The lamps may be connected to

either be on steady or to flash when a call is received, and the audio annunciator may either ring

once, ring repeatedly, or not at all. Resetting the unit may be accomplished via a single reset

button, one for each channel, or by selecting the associated radio and transmitting on it, causing its

push-to-talk circuitry to reset the SELCAL. The pilot should determine from the installation

agency what the normal SELCAL response should be to a call and how to reset the annunciators.

In any case, the receipt of a SELCAL call will illuminate only the annunciator lamp for the radio

which detected the call.

Manual SELF-TEST Operation

Generating a SELF-TEST is done by pressing the SELF-TEST button, if installed. Pushing and

releasing the SELF-TEST button initiates an internal sequence within the CSD-714 which tests the

unit completely. A fully functioning unit will complete the self-test within approximately four

seconds by indicating a SELCAL call has been detected on all channels at once. Should all

channels not test correctly, the annunciator light for the failed channel will not light. Should the

unit find that the code selection programmed into the unit is invalid, it will not light any of the

annunciators and will appear to have done nothing.

In the -000 and -002 versions the annunciator outputs resulting from a self-test remain active until

manually reset. In the -002 and -003 versions the annunciator outputs resulting from a self-test

remain active for approximately two seconds and then automatically reset.

Power On SELF-TEST Operation

When power is initially applied to the unit, if the code selection the unit is programmed for is

invalid the unit will light all annunciators and will flash and strobe the chime as appropriate and

will not respond to RESET input commands. In this case, the pilot should turn the unit off and

report it malfunctioning.

23-21-01

June 1995

Seattle, WA USA

Rev 1

Page 2