Intercom Performance; Control Inputs; Antenna Requirements; Serial Interface - Garmin Apollo SL40 Installation Manual

Microphone input ..................................... Two inputs, standard carbon or dynamic mic with
Modulation capability............................... 85% with 100mv to 1000mv rms microphone input
Audio frequency distortion ....................... < 10% at 85% modulation at 350 to 2500 Hz
Audio frequency response ........................ < 4db variation with 350 to 2500 Hz, 85%
Carrier noise level..................................... > 35 dB down
Sidetone output ......................................... up to 280mW into 100:, 120mW into 500:
Duty cycle ................................................. 100%
Stuck mic time-out.................................... 35 second time-out, reverts to receive
I P
NTERCOM ERFORMANCE
Microphone input ..................................... Two inputs, standard carbon or dynamic mic with
Headphone audio output level .................. 280 mW into 100:, 120 mW into 500:
AGC characteristic.................................... output varies < 3 dB with input of 100mv rms to
C I
ONTROL NPUTS
Transmit key ............................................. Input pulled low to ground to enable the transmitter
Intercom select.......................................... Input pulled low to ground to enable the intercom
A R
NTENNA EQUIREMENTS
The Apollo SL40 requires an antenna meeting the following specifications.
Standard 50: vertically polarized antenna with a VSWR < 2.5:1.
S I
ERIAL NTERFACE
RS-232 ...................................................... Defined in Appendix E - Serial Interface
Apollo SL40 Installation Manual
integrated preamp providing minimum 70mv rms
into 1000: load
at 1000 Hz
modulation
integrated preamp providing minimum 70mv rms
into 1000: load
1000mv rms
function
Specifications
Specifications
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