Radioddity DB25-D - DB40-D Transmitter Specifications

Radioddity Extended manual for Radioddity DB25-D, DB40-D & GD-88 v3.0
© Radioddity 2023 page 228 of 252
18.6 Transmitter of the DB40-D
Parameter
VHF
UHF
Frequency Range
136…174 MHz
400…480 MHz
Channel Spacing
12.5 kHz / 25 kHz
Frequency stability (-20°C … +25°C)
± 1.5 ppm
Low Power
25 W
25 W
High Power
40 W
40 W
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
Audio Response
+1 dB, -3 dB
Audio Distortion
3%
FM modulation
12.5kHz: 11KOF3E
25kHz: 16KOF3E
4FSK digital modulation
12.5 kHz data: 7K60F1D and 7K60FXD
12.5 kHz audio: 7K60F1E and 7K60FXE
12.5kHz data and audio: 7K60F1W
Digital vocoder
AMBE+2™
Digital agreement
ETSI-TS 102 361-1, -2, -3