Chapter 1
9
www.javad.com
I
NTRODUCTION
External extra rugged digital high power VHF radio transceiver programmable in frequency ranges from
215 to 255
MHz
1
. It has GMSK, BPSK, QPSK, 8PSK, and 16QAM modulations with advanced forward
error correction and data scrambling. The output power is programmable up to 4 W.
Figure 1. HP204BT
2
The HPT204BT radio transceiver provides a high-speed Point-to-Point and Point-to-Multipoint wireless
data transfer at up to 38.4 kbps. HPT204BT supports user selectable modulation techniques (GMSK,
BPSK, QPSK, 8PSK, or 16QAM), which allows the user to achieve the highest data speed for a given
range (up to 16 miles / 26 km). It also includes a selectable error correction, which improves the
functioning of the radio modem under interference.
The sophisticated features of HPT204BT include data scrambling, frequency hopping, user selectable
transmit output power level, low power consumption sleep modes, autoscanning 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 HPT204BT 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.
1. Rated RF output power and frequency ranges for USA: 2 W - 217-220 MHz, 4 W - 220-222 MHz; for Canada: 4 W - 217-218 and 219-
220 MHz, 4 W - 220-222 MHz
2. Other names for marketing purposes are HPT204, AW200BT, AW200 and AW200AF