120 20130-101a
GeminiG3 – 700MHz User Manual
47
6. Specifications
GENERAL
700 MHz
Frequency
796-803 MHz TX (under part 90) and 792-794 MHz TX (under part 27)
766-773 MHz RX and 762-764 MHz RX
Number of Channels
32 internally stored, over-the-air programmable
Tx-Rx Channel spacing
50 kHz
Frequency Control
Digital Synthesizer / uController
Frequency Stability
1.0 ppm
Operating temperature
-30°C to +60°C (25°C nominal) @ 95% non-cond. RH
Mode of Operation
Half Duplex
Data Encryption
AES 128-bit
Supply voltage
13.6Vdc nominal (negative ground)
10.9 – 16.3 VDC
Circuit Protection
15 Amp fuse external,
Internal crowbar diode for reverse polarity protection
RX Current at 13.6 VDC
< 750 mA Standby (with GPS receiver)
TX Current at 13.6 VDC
< 12 A
TX/RX separation
30 MHz typical
Nominal Dimensions
7.1” D x 6.0” W x 2.0” H
Weight:
< 4.5 lbs.
RF input/output Impedance
50 ohms nominal
RF connector
Main TX/RX – equipped with either mini-UHF female or TNC female
Auxiliary RX – equipped with either mini-UHF female or TNC female
GPS RX: SMA female (Not installed for G3 Lite version)
Interface connector
1x 10/100 Base-T Ethernet RF-45
1x USB 2.0 B-type receptacle (future use)
2x DE-9F D-subminiature Serial Interfaces configured as terminal servers
RECEIVER
Selectivity
(Adjacent channel rejection)
68 dB, 65 dB minimum @ 50 kHz channel
Intermodulation rejection
78 dB typical, 75 dB minimum
FM hum & noise ratio
-50 dB max @ 50 kHz *
Spurious Response Rejection
80 dB min
Conducted spurious
-57 dBm
Sensitivity
For 1% Packet Error Rate (PER)
with
Parallel Decode at carrier frequency
700 MHz (50 kHz channel)
–95 dBm @ 128 Kbps
-102 dBm @ 96 Kbps
-108 dBm @ 64 Kbps
Protocol
Dataradio Proprietary E-DBA with OOB AAVL support
* psophometrically weighted filter