Radioddity DB25-D - GD-88 Transmitter Specifications

Radioddity Extended manual for Radioddity DB25-D, DB40-D & GD-88 v3.0
© Radioddity 2023 page 230 of 252
18.9 Transmitter of the GD-88
Parameter
VHF
UHF
Frequency Range
136…174 MHz
400…480 MHz
Frequency stability (-30°C … +25°C)
± 1.5 ppm
Low Power
2.5 W
2.5 W
High Power
7.0 W
7.0 W
FM modulation Type
12.5 kHz: 11KOF3E / 25 kHz: 16KOF3E
Modulation restriction
±2.5 dB @ 12.5 kHz / ± 5 dB @ 25 kHz
FM hum & noise
-40 dB @ 12.5 kHz / -45 dB @ 25 kHz
Conducted / radiated emission
-36 dBm < 1GHz / -30 dBm > 1 GHz
Adjacent channel selectivity
-60 dB @ 12.5 kHz / -65 dB @ 25 kHz
Maximum Deviation
≤±2.5 kHz @ 12.5 kHz
≤±5.0 kHz @ 25 kHz
Spurious Emission
≤65 dB below carrier
Audio Response
+1 dB, -3 dB
Audio Distortion
3%
4FSK digital modulation
12.5 kHz data: 7K60F1D and 7K60FXD
12.5 kHz audio:7K60F1E and 7K60FXE
12.5 kHz data and audio:7K60F1W