Garmin GTR 225 Installation Manual

Also see for GNC 255: Pilot's guide

Contents

Garmin GTR 225 Installation Manual Manual pdf 17 page image

190-01182-02 GTR 225/GNC 255 TSO Installation ManualRev. B Page 1-31.3.3 DisplayThe display on the GTR/GNC is a sunlight readable LCD display.1.3.4 COM Specifications1.3.4.1 COM Transmitter SpecificationsCharacteristics SpecificationsDisplay Size Width: 3.46” (88.0mm)Height: 0.843” (21.4mm)Active Area Width: 2.95” (74.98mm)Height: 0.486” (12.36mm)Resolution 200 x 33 pixelsViewing AngleLeft: 45Right: 45°Up: 10Down: 30Characteristics SpecificationsClasses 3, 4, 5, 6Microphone Input Two inputs, standard carbon or dynamic mic with integrated preampproviding minimum 70 mVRMS into 1000 Ω loadModulation Capability 85% with 100 to 1000 mVRMS microphone input at 1000 HzModulationAM Double sidedEmission Designator:6K00A3E (118 - 136.975 MHz)5K60A3E (118 - 136.992 MHz)Frequency Range 118.000 to 136.975 MHz, 25 kHz channel spacing118.000 to 136.992 MHz, 8.33 kHz channel spacingFrequency Tolerance +/-2ppm from -40°C to +70°COutput Power 10 Watt Mode: 10 watts minimum16 Watt Mode: 16 watts minimumDuty Cycle10W: 100%16W: Recommended 25% (5 seconds on/15 seconds off,15 seconds on/45 seconds off, etc.)Carrier Noise Level At least 35 dB (SNR).Stuck Mic Time-Out 30 seconds time-out, reverts to receiveDemodulated Audio Distortion Less than 5% distortion when the transmitter is at 85% modulationat 350 to 2500 HzSidetone 1.4 Vrms into a 500 Ω load