Chapter 1. Introduction; Getting Acquainted - Javad HPT404BT Operator's Manual

Chapter 1
I
NTRODUCTION
HPT404BT with GSM is the up-to-date unsurpassed 4 W UHF radio transceiver with USB and
Bluetooth® capacity, and built-in quad band GSM/GPRS module. HPT404BT accesses Real Time
Network (RTN) via GPRS, takes incoming data from the network, modulates it with GMSK, FSK, PSK
or most spectrum efficient QAM modulation and transmits it at RF power output levels from 15 dBm up
to 36 dBm operating in UHF frequency band (406 to 470 MHz). The data taken from RTN can be routed
to the UART, USB or Bluetooth communication ports as well. HPT404BT is also capable of receiving RF
signal from remote UHF transmitter or data from communication ports (UART, USB or Bluetooth) and
sending it over the cellular network using built-in GSM/GPRS module if such operation mode is selected.
Figure 1. HPT404BT with GSM
The HPT404BT with GSM radio transceiver provides a high-speed point-to-point and point-to-multipoint
wireless data transfer at up to 38.4 kbps. The firmware supports user selectable modulation techniques,
which allows the user achieving the highest data speed for a given range. It also includes a selectable
error correction, which improves the functioning of the radio modem under interference. The
sophisticated features of HPT404BT with GSM include data scrambling, frequency hopping, user
selectable transmit output power level, low power consumption sleep modes, autoscanning for base and
plug-and-play installation for remote terminals.
The firmware of the HPT404BT with GSM radio modem resides in a flash memory. The updating of the
radio modem programs is entirely software-based. The flash memory is re-programmable through an RS-
232 interface, USB, Bluetooth. By accessing to the internet via GPRS the HPT404BT with GSM
provides remote CLI access and can be configured remotely (through the internet) if corresponding
operation mode is selected.

1. Getting Acquainted

The HPT404BT with GSM is a rugged and very powerful external radio transceiver 146 mm wide 75 mm
deep 44 mm high, 488 g.
weighs
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