Garmin GTR 225 User Manual

190-01182-02 GTR 225/GNC 255 TSO Installation Manual
Rev. F Page 1-5
Table 1-5 COM Receiver Specifications
Characteristics Specifications
Classes C, E, H1, and H2
Frequency range
118.000 to 136.975 MHz, 25 kHz channel spacing
118.000 to 136.992 MHz, 8.33 kHz channel spacing
Headset audio output 100 mW minimum into a 500  load
Speaker audio output 12 W into 4 
Audio response Less than 6 dB of variation between 350 and 2500 Hz
Audio distortion Less than 5% at rated output power
Automatic gain control
(AGC) characteristics
Less than 3 dB of variation in the audio output from -93 to -13 dBm (power
absorbed by a 50  load)
Sensitivity
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
Squelch Automatic squelch with manual override
Selectivity
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
Maximum audio output
reduction (offset
carrier operation)
11.2 dB

Garmin GTR 225 Specifications

General

Input Voltage	11-33 VDC
Operating Voltage	11-33 VDC
Operating Temperature	-20°C to +55°C
Frequency Range	118.000 MHz to 136.975 MHz
Channel Spacing	25 kHz
Transmit Power	10 W
Current Consumption	1.5 A (max transmit)