Chapter 1. Introduction - Javad HPT901BT User Manual

Chapter 1
I
NTRODUCTION
External extra rugged digital high power UHF radio transceiver is designed as universal license-free
modem. It uses 902-928 MHz ISM (industrial, scientific and medical) license free USA/Australia band
frequency hopping transmission techniques for excellent reliability in noisy plant environments and
European CEPT license free 868-870 MHz band, allocated for narrow band telemetry, alarms and data
transfer applications.
Figure 1. HPT901BT without battery and HPT901BT with battery
The HPT901BT is a wireless system, based on FH915 – Spread Spectrum Radio Transceiver.
The Digital Data is delivered to/from the FH915 Radio Transceiver through the Serial (RS232)
connection, through USB- to-Serial adapter or through the Bluetooth module. The modem status is
indicated by LEDs.
The HPT901BT radio transceiver provides a high-speed Point-to-Point and Point-to-Multipoint wireless
data transfer at up to 64.0 kbps. HPT901BT supports GMSK modulation technique, which allows the
user to achieve the highest data speed. It also includes a forward error correction, data packets doubling
technique and data scrambling, which improve the functioning of the radio modem with frequency
hopping under interference. The output power is programmable up to 1 W.
The sophisticated features of HPT901BT include user selectable frequency hopping sequences and
transmit output power level, low power consumption sleep modes and plug-and-play installation for
remote terminals.
The firmware of the HPT901BT radio transceiver resides in a flash memory. The updating of the radio
modem programs is entirely software-based. The flash memory is reprogrammable through an RS232
interface, USB, or Bluetooth.
The unit's user settings can be changed through the built-in Command Line interface (CLI) or through the
supporting software ModemVU - Windows based Unit Configuration and Maintenance Software
Application running on a IBM PC compatible computer and connecting to the device over RS-232
interface or USB.
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