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26 Apollo GX50/60/65 Installation Manual
Serial Interface Configuration
The GX50/60/65 RS-232 serial ports can be configured for several input and output formats.
To select the serial port configurations:
1. In test mode, rotate the LARGE knob to the serial port configuration “CH RX TX” page.
2. Press SEL (the selection fields will start flashing), rotate the LARGE knob to select the port,
rotate the SMALL knob to select the desired configurations, then press ENT when complete.
The available serial port configurations are included in Appendix E. Serial output connections
should be limited to no more than three external units. An example of the typical settings for
the RS-232 selections for most installations would be:
CH Rx Tx
1: NAV MapCom
2: AltEnc GPSS
Comm Radio Setup
The Test Mode settings may also be used to preset the Microphone (Mic) Gain and the
Receiver Squelch levels.
Mic Gain
Set the microphone gain for microphones 1 and 2 for values from 0 to 255.
1. In the Test Mode, rotate the LARGE knob to select "Mic Gain."
2. Press SEL to activate selection. The Mic 1 value will flash.
3. Turn the SMALL knob to change the value.
4. Turn the LARGE knob to the Mic 2 value. Turn the SMALL knob to change the value.
5. Press ENTER to accept and save the settings.
Receiver Squelch
Preset the receiver squelch level for values from 25-100.
1. In the Test Mode, rotate the LARGE knob to select "Receiver Squelch."
2. Press SEL to activate selection. The value will flash.
3. Turn the SMALL knob to select a value.
4. Press ENTER to accept and save the settings.
Other Test Mode Pages
The GX50/60/65 test mode includes several other pages that are not necessary for the
checkout. They are as follows:
“TO TEST DISPLAY” ...................... Can be used to check the GX50/60/65 front panel displays
by pressing ENTER.
“TEST CONTROLS”......................... Can be used to check the GX50/60/65 front panel
controls. Press each button and rotate the SMALL knob to
check the controls.
“OPERATION STATUS:”................. Factory use only. Should be set to “STANDARD.”