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Specifications
38 Apollo GX50/60/65 Installation Manual
INTERCOM PERFORMANCE (GX60/65 ONLY)
Microphone input......................................Two inputs, standard carbon or dynamic mic with
integrated preamp providing minimum 70 mV rms
into 1000Ω load
Headphone audio output level ..................280 mW into 100Ω, 120mW into 500Ω
AGC characteristics ..................................output varies < 3dB with input of 100mV rms to
1000 mV rms
CONTROL INPUTS
Simulator select.........................................Must be connected to ground for normal operation,
leave open for built-in simulator operation
Hold select ................................................Waypoint sequencing hold input, connect to
momentary button to ground for hold input
operation, should be combined with the OBS/HLD
annunciator (optional on GX65)
Transmit key (GX60/65)...........................Input pulled low to ground to enable the transmitter
Intercom select (GX60/65)........................Input pulled low to ground to enable the intercom
function
Flip/Flop (GX60/65) .................................Remote comm flip/flop input, connect to a
momentary button to ground for remote flip/flop
operation.
ANTENNA REQUIREMENTS
GPS ANTENNA
The GX50 and GX60/65 are designed to operate properly with the A-33 or A-34 GPS
antennas. The GX50/60/65 supplies 5 volts for the antenna.
COMM ANTENNA
The Apollo GX60/65 requires a VHF comm antenna meeting the following specifications.
Standard 50Ω vertically polarized antenna with a VSWR < 2.5:1.
SERIAL INTERFACE
RS-232 ......................................................Defined in Appendix E - Serial Interface
Specifications