Chapter 1
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I
NTRODUCTION
External extra rugged digital high power VHF radio transceiver programmable in frequency ranges from
215 to 255 MHz. The HPT225BT provides half-duplex communication with transmitter output power of
2 W in the frequency band 217 - 220 MHz and 25 W in the frequency band 220 - 222 MHz for USA; 25
W the frequency bands 217 - 218 MHz, and 219 - 220 MHz, 220 - 222 MHz for Canada. It has GMSK,
DBPSK, DQPSK, 4FSK, D8PSK, and D16QAM modulations with advanced forward error correction
and data scrambling. The output power is programmable from 320 mW to 25 W.
Figure 1. HPT225BT
The HPT225BT radio transceiver provides a high-speed Point-to-Point and Point-to-Multipoint wireless
data transfer at up to 38.4 kbps. HPT225BT supports user selectable modulation techniques (GMSK,
4FSK, DBPSK, DQPSK, D8PSK, or D16QAM), which allows the user to achieve the highest data speed
for a given range (up to 48 miles / 77 km). It also includes a selectable error correction, which improves
the functioning of the radio modem under interference.
The sophisticated features of HPT225BT include data scrambling, frequency hopping, user selectable
transmit output power level, low power consumption sleep modes, autoscannin and plug-and-play
installation for remote terminals.
The built-in software tools provide the wireless link testing, unit’s status and error statistics monitoring as
well as unit’s settings change over the air. The firmware of the HPT225BT radio transceiver resides in a
flash memory. The updating of the radio modem programs is entirely software-based. The flash memory
is re-programmable through an RS232 interface, USB, Bluetooth, or over the air. The unit’s user settings
can be changed through the built-in Command Line interface (CLI), Tracy Software or through
ModemVU.
Summary of Contents for HPT225BT
Page 2: ...www javad com JAVAD GNSS Inc 2012 ...
Page 10: ...Preface Technical Assistance 10 www javad com ...
Page 26: ...Configuration Bluetooth Configuration 26 www javad com ...
Page 36: ...Command Line Interface Diagnostics and Identification Commands 36 www javad com ...
Page 44: ...Safety Warnings General Warnings 44 www javad com ...
