120 20130-101a
GeminiG3 – 700MHz User Manual
2
1.2.1 Features
•
Native IP mobile operates at 128 Kbps in 50 kHz channels with exceptional adjacent channel pro-
tection. 96 and 64 Kbps rates are built-in for lower density areas. Uses 700MHz / 50kHz land
mobile channels in the bands of operation:
766-773 MHz TX (under FCC part 90) and 762-764 MHz TX (under FCC part 27)
Table 1 - On-Air Data Speeds & Modulation
Channel spacing
Modulation type
50 kHz
SRC16FSK
128 kb/s
SRC8FSK
96 kb/s
SRC4FSK
64 kb/s
•
Built as a one-piece integrated design in a rugged die-cast aluminum chassis, GeminiG3 units
automatically adapt to the speed of the base station for maximum network flexibility.
•
Parallel Decode™ (PD) technology featuring dual receivers results in added decode sensitivity in
multi-path and fading environments.
•
The next generation high efficiency E-DBA Airlink protocol assures users of data throughput of
up to 64 kilobits per second; enough to support video from a patrol car.
•
Sophisticated DSP-based modem design provides added system performance, fewer retries and
more effective throughput.
•
Stateless Data Compression and Protocol Reduction works with TCP/IP and UDP to get the most
efficient use of user available bandwidth without requiring a dedicated server or gateway.
•
AES 128-bit encryption ensures that both data and network remain secure.
•
Built–in, up to 32 channels, synthesized half-duplex operating transceiver with automatic channel
selection for improved roaming capabilities.
•
Internal 12-channel WAAS capable GPS receiver. Out-of-band (OOB) signaling enables trans-
mission of GPS reports with no effect on system throughput. AAVL enables periodic OOB re-
ports based on time or distance.
•
Using standard 10/100 BaseT Ethernet RJ-45 automatic MDIX, the Gemini3 unit acts as router
and interfaces with any Ethernet device and IP v4 application. Using an in-car hub or switch
makes adding other peripherals, such as a camera, possible.
•
The two RS-232 ports can be configured as terminal servers.
•
Embedded Web server provides browser access for status and configuration of network parame-
ters. Additionally, for ease of maintenance or upgrades, all unit firmware can be re-programmed
over-the-air.
•
With optional NMS package, gives network administrators a proactive tool to collect and analyze
diagnostic information.