Radioddity DB25-D - GD-88 General Specifications; GD-88 Receiver Specifications

Radioddity Extended manual for Radioddity DB25-D, DB40-D & GD-88 v3.0
© Radioddity 2023 page 229 of 252
18.7 General specifications of the GD-88
Parameter
VHF
UHF
Frequency
136…174 MHz
400…470 MHz
Type
Dual band, Dual standby, Dual mode,
Dual VFO
Digital mode
TDMA 2-TimeSlot technology
(Tier 1 and Tier 2)
Digital vocoder
AMBE+2™
Digital agreement
ETSI-TS 102 361-1, -2, -3
Zones
16
Channel Capacity
Up to 4000 (250 Channels per Zone)
PLL Channel Spacing
12.5 kHz / 25 kHz
Operating Temperature
0° C … +40° C
Antenna Impedance
50 Ω
LiPo Battery
7.4V / 3000 mAh
Rated Voltage
DC 7.4V
Dimension (H x W x D)
125 mm x 60 mm x 39 mm
Weight
317 g
Battery:
The average battery life under 5/5/90 duty cycle, and using carrier squelch
and TX high power with 3000mAh LiPo battery
Analog: 15 hours / Digital: 23 hours
18.8 Receiver of the GD-88
Parameter
VHF
UHF
Frequency Range
136…174 MHz
400…480 MHz
Operating Bandwidth
≤±5 kHz @ 12.5 kHz / ≤±7 kHz @ 25 kHz
Frequency stability (-20°C … +25°C)
± 1.5 ppm
IFs
mixing 45 MHz in segment A
mixing 51.550 MHz in segment B
FM modulation Type
12.5 kHz: 11KOF3E / 25 kHz: 16KOF3E
Analogue sensitivity
0.3 µV / 0.25 µV
Digital sensitivity (5 % BER)
0.25 µV / 0.2 µV
Intermodulation
65 dB
Adjacent Channel Selectivity
≥60 dB @ 12.5 kHz / ≥65 dB @ 25 kHz
Spurious rejection
65 dB
Rated audio
500 mW
Audio Distortion @ rated audio
3 %
FM hum & noise
-40 dB @ 12.5 kHz / -45 dB @ 25 kHz
Audio response
+1 dB, -3 dB
Conducted / radiated emission
-57 dBm