Com Specifications (Gtn 635/650 Only) - Garmin GTN 635 Installation Manual

1.3.4

COM Specifications (GTN 635/650 Only)

1.3.4.1 COM Transmitter Specifications
Characteristics
Classes
Microphone Input
Modulation Capability
Modulation
Frequency Range
Frequency Tolerance
Output Power
Duty Cycle
Carrier Noise Level
Stuck Mic Time-Out
Demodulated Audio Distortion
Sidetone
1.3.4.2 COM Receiver Specifications
Characteristics
Classes
Frequency Range
Headset Audio Output
Audio Response
Audio Distortion
AGC Characteristics
Sensitivity
Squelch
Selectivity
Page 1-4
Rev. C
3, 4, 5, 6
Two inputs, standard carbon or dynamic mic with integrated
preamp providing minimum 70 mVRMS into 1000 load
85% with 100 to 1000 mVRMS microphone input at 1000 Hz
AM double-sided
Emission Designator: 6K00A3E (118 – 136.975 MHz)
5K60A3E (118 – 136.992 MHz)
118.000 to 136.975 MHz, 25 kHz channel spacing
118.000 to 136.992 MHz, 8.33 kHz channel spacing
+/-2ppm from -40°C to +70°C
10 Watt Mode: 10 watts minimum
16 Watt Mode: 16 watts minimum
100%
16W: Recommended 25% (5 seconds on/15 seconds off,
15 seconds on/45 seconds off, etc.)
At least 35 dB (SNR).
30 seconds time-out, reverts to receive
Less than 5% distortion when the transmitter is at 85%
modulation at 350 to 2500 Hz
1.4 Vrms into a 500 load
C and E
118.000 to 136.975 MHz, 25 kHz channel spacing
118.000 to 136.992 MHz, 8.33 kHz channel spacing
100 mW minimum into a 500 load
Less than 6 dB of variation between 350 and 2500 Hz.
Less than 5% at rated output power
Less than 3 dB of variation in the audio output from -93 to -13
dBm (power absorbed by a 50 load)
SINAD on all channels is greater than 6 dB when the RF level is
2 uV (hard) or -107 dBm (power absorbed by a 50 load)
modulated 30% at 1000 Hz at rated audio output power
Automatic squelch with manual override
6 dB BW is greater than +7 kHz for 25 kHz channeling.
60 dB BW is less than ±22 kHz for 25 kHz channeling.
6 dB BW is greater than ±3.5 kHz for 8.33 kHz channeling.
60 dB BW is less than ±7.37 kHz for 8.33 kHz channeling.
Specifications
Specifications
GTN 625/635/650 TSO Installation Manual
190-01004-02