Installation Guide

120 20110-142 Gemini
PD
Installation Guide
22
6. Specifications
GENERAL
UHF 800 MHz
Frequency Tx
403 - 512 MHz
1
806 – 824 MHz (821-824)
Frequency Rx
403 - 512 MHz
1
851 – 869 MHz (866-869)
Channel spacing 12.5 or 25 kHz
Frequency Control Digital Synthesizer / uController
Frequency Stability 1.5 ppm
Operating temperature -30°C to +60°C (25°C nominal) @ 95% non-cond. RH
Modes of Operation Simplex or Half Duplex
Number of channels 16 internally stored
Supply voltage 13.6Vdc nominal (negative ground)
10.9 – 16.3 VDC
Circuit Protection 15 Amp fuse external
2 & 4 Amp fuse internal
RX Current at 13.6 VDC
< 550 mA Standby (with auxiliary receiver)
TX Current at 13.6 VDC < 15 A
TX/RX separation 5 MHz typical
Nominal Dimensions 7.050” D x 6.000” W x 2.0000” H
Weight: < 3.5 lbs.
RF input/output Impedance 50 ohms nominal
RF connector Main TX/RX: mini-UHF female
Auxiliary RX: mini-UHF female
GPS RX: SMA female (Not installed for Gemini
PD
Lite version)
Interface connector 3x DE-9F D-subminiature
RECEIVER
Sensitivity (12 dB SINAD) < 0.35 µV *
Selectivity (25KHz) 75 dB typical
70 dB minimum
Selectivity (12.5) 65 dB typical
60 dB minimum
Intermodulation 75 dB typical
70 dB minimum
Spurious rejection 75 dB typical
70 dB minimum
FM hum & noise -45 dB typical *
Conducted spurious < -57 dBm
* psophometrically weighted filter
1
WARNING
: The frequency band 406 to 406.1 MHz is reserved for use by distress beacons
and should not be programmed into the unit.