HPT435BT UHF Radio Transceiver

JAVAD HPT435BT 35W UHF Radio Transceiver

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The HPT435BT 35W UHF radio transceiver from JAVAD GNSS provides a high-speed point-to-point and point-to-multipoint wireless data transfer at up to 38.4 kbps, at a maximum range of 48 miles (77 km).



The HPT435BT 35W UHF radio transceiver from JAVAD GNSS provides a high-speed point-to-point and point-to-multipoint wireless data transfer at up to 38.4 kbps, and offers USB/Bluetooth® capabilities with built-in wireless link monitoring.

The HPT435BT is programmable in frequency ranges from 406 to 470 MHz with channel spacing of 25 kHz, 20 kHz 12.5 kHz, 6.25 kHz. It is compatible with Pacific Crest, Satel, and Trimble protocols and can be used in the existing networks. The output power is programmable from 0.32 Watt to 35 Watts. This transceiver has DBPSK, DQPSK, D8PSK, D16QAM, GMSK, and 4FSK modulations with advanced forward error correction and data scrambling.

The HPT435BT 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 the HPT435BT include data scrambling, frequency hopping, user-selectable transmit output power level, low power consumption sleep modes, autoscanning for the base, and plugand-play installation for remote terminals.

The built-in software tools provide the wireless link testing, status, error statistics monitoring, and the unit’s settings change over the air. The firmware of the HPT435BT radio transceiver resides in 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.


  • 48 miles/77 km maximum distance range
  • Data speed over the air 38400 bps at 25 kHz and 9200 bps at 12.5 kHz
  • Bluetooth® interface
  • Programmable output power (320 mW to 35 W)
  • Advanced forward error correction (FEC)
  • Serial port configurable as RS-232 and RS-422, or RS-485
  • Data speed over the serial port 9600 to 115200 bps
  • Testing, monitoring, and control of the unit over the air
  • Automatic search and select for best frequency/channel

Technical Specifications

Operating Frequency Range:406-470 MHz (EU); 406.1-470 MHz (USA) 406.1-430; 450-470 MHz (Canada)
Channel Bandwith:25/12.5/6.25 kHz (USA for 406-420 MHz); 12.5/6.25 kHz (USA for 421-470 MHz); 25/12.5/6.25 kHz (Canada);
25/20/12.5 kHz (EU)
Nominal Impedance:50 Ohms
End to End Delay:60 ms
Communication Mode:Time Division Duplex (TDD), Time Division Multiple Access (TDMA)
Maximum Distance Range:48 miles (77 km)
Output Power:USA, Canada: 25 dBm to 45.44 dB m in 1 dB step (320 mW to 35W); EU: 25 dBm to 41.76 dBm in 1 dB step (320 mW to 15W)
Output Power Control Accuracy:±1.5 dB (at normal test conditions)
Carrier Frequency Stability:±1.5 ppm initial stability over temp with ±3.0 ppm aging/year
Max. Frequency Error:±1.0 kHz (at normal test conditions); ±1.5 kHz (under extreme test conditions)
Spurious Emission (Conducted):-36 dBm (9 kHz – 1 GHz); 30 dBm (1–4 GHz)
Spurious Emission (Radiated):-36 dBm (9 kHz – 1 GHz); -30 dBm (1-4 GHz)
Noise Figure:3 dB
Dynamic Range::-115 to –15 dBm
Max. Input Signal Level:-10 dBm
Co-channel Rejection:-8 dB for 25 kHz Channel Bandwith; -12 dB for 12.5 kHz Channel Bandwith; -16 dB for 6.25 kHz Channel Bandwith
Adjacent Channel Selectivity:70 dB for 25 kHz Channel Bandwith; 60 dB for 12.5 kHz Channel Bandwith; 50 dB for 6.25 kHz Channel Bandwith
Power Supply Voltage:+9 to +16 VDC nominal
Power Consumption:Continuous Transmit/Transmit with 30% duty cycle/Sleep 120W/38W/300mW (USA, Canada); 60/20/300mW (EU)
Operating Temperature:-40°C to +60°C (-40°F to 140°F)
Storage Temperature:-40°C to +85°C (-40°F to 185°F)
Enclosure:Aluminum, IP67
Dimensions:152 mm x 84 mm x72 mm (5.98 in x 3.3 in x 2.83 in)
Weight:900 g (1.98 lbs)
Housing Color:Two-tone Green/Gray
Antenna Connector:TNC, 50Ω
FCC:Part 90
Industry Canada:RSS-119
R&TTE:ETSI EN 300 113-2, ETSI EN 301 489-5, EN 60950-1:2006

Why Buy from Us?

In business since 2004, Canal Geomatics is an authorized dealer for JAVAD GNSS and has established itself as an industry-leading distributor of high-precision positioning products in North America. Our mission is to find the best solution for each unique application and extend premium support to ensure the long-term success of our customers. We offer both volume and reseller discounts for the majority of our product lines.


The HPT435BT 35W UHF radio transceiver from JAVAD GNSS is available through Canal Geomatics. If you would like more information about this product, please feel free to get in touch with us by completing the Request Pricing form.