Table 20: GTR 8000 Base Radio Specifications for IV&D VHF (136–174 MHz)
Receiver Specifications
Frequency Range 136–174 MHz
Modulation C4FM, H-CPM, FM
Analog Sensitivity (12 dB SINAD)
12.5 kHz: -119 dBm
25/30 kHz: -118 dBm
Digital Sensitivity 5% Bit Error Rate Static
(BER)
C4FM: -119 dBm
H-CPM: -117 dBm
Faded Sensitivity 5% Bit Error Rate (BER)
C4FM: -111 dBm
Intermodulation Rejection 85 dB
Digital Adjacent Channel Rejection 60 dB
Analog Adjacent Channel Rejection (EIA603)
Analog 12.5 kHz
75 dB
Analog Adjacent Channel Rejection (TIA603D)
Analog 12.5 kHz: 50 or 60 dB (adjustable
Analog 25 kHz: 80 dB
Spurious and Image Response Rejection 90 dB
95 dB with preselector
Analog Audio Response +1, -3 dB from 6 dB per octave de-emphasis;
300–3000 Hz referenced to 1000 Hz at line out-
put
Analog Audio Distortion 3% or 5% (adjustable)
Analog FM Hum and Noise
12.5 kHz: 45 dB
25 kHz: 50 dB
Signal Displacement Bandwidth 1 kHz
Intermediate Frequencies
1st: 44.85 MHz
2nd: 2.16 MHz
RF Input Connector with Optional Preselector N female
Electronic Bandwidth Full Bandwidth
Blocking Immunity 100 dB
Conducted Spurious -57 dBm
Bit Error Rate Floor 0.01%
MN003286A01-E
Chapter
1: GTR 8000 Base Radio Description
55
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