S
PECIFICATIONS
A.1. HPT404BT UHF Modem Specifications
The following sections provide specifications for the modem and its internal components.
A.1.1. General Radio Specifications
Operating Frequency Range
Channel Spacing
Data Rate (25/20/12.5/6.25 kHz
Channel Spacing)
System Gain for DBPSK
modulation (Antenna gain is not
included)
Roaming Speed for DBPSK modulation 75 mph / 120 km/h
Modulation
Nominal Impedance
End to End delay
Communication Mode
Maximum Distance Range
Serial port
USB
Bluetooth
Bluetooth Antenna
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Table A-1. General Radio Specifications
Parameter
Specification
406 - 470 MHz (EU)
406.1 - 470 MHz (USA)
406.1 - 430;450-470 MHz (Canada)
25/12.5/6.25 kHz (USA, Canada)
25/20/12.5 kHz (EU)
9600/7500/4800/2400 bps – DBPSK/GMSK
19200/15000/9600/4800 bps – DQPSK/4FSK
28800/22500/14400/7200 bps – D8PSK
38400/30000/19200/9600 bps – D16QAM
161 dB (for 25 kHz Channel Spacing)
163 dB (for 12.5 kHz Channel Spacing)
164 dB (for 6.25 kHz Channel Spacing)
GMSK/4FSK/DBPSK/DQPSK/D8PSK/D16QAM
50 Ohms
60 ms
Time Division Duplex (TDD)
Time Division Multiple Access (TDMA)
16 miles / 26 km
Serial (RS-232) up to 115200 bps.
Serial port configurable as RS-232 and
RS-422, or RS-485
USB 2.0 device port (12 Mbps)
Bluetooth V2.0 Class 2 supporting SPP Slave and
Master Profiles
External
Appendix A
35
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