120 20110-100
Gemini/PD Installation Guide
19
6. Specifications
GENERAL
UHF
800 MHz
Frequency Tx
400 - 512 MHz
1
806 – 824 MHz (821-824)
Frequency Rx
400 - 512
MHz
1
851 – 869 MHz (866-869)
Channel spacing
12.5, 20 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
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.
