Com Specifications; Table 1-4 Com Transmitter Specifications - Garmin GTR 225 Installation Manual

1.4

COM 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
190-01182-02
Rev. F

Table 1-4 COM Transmitter Specifications

3, 4, 5, 6
Two inputs, standard carbon or dynamic mic with integrated
preamp providing minimum 70 mVRMS into 1000 Ω 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
+/-2 ppm from -40°C to +70°C
10 watt mode: 10 watts minimum
16 watt mode: 16 watts minimum
10 W: 100%
16 W: 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 Ω load
Specifications
GTR 225/GNC 255 TSO Installation Manual
Page 1-4