Appendix A
33
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S
PECIFICATIONS
A.1. HPT204BT VHF Modem Specifications
The following sections provide specifications for the modem and its internal components.
A.1.1. General Radio Specifications
Table A-1. General Radio Specifications
Parameter
Specification
Operating Frequency Range
215-255 MHz
Rated RF Output Power and Frequency
Ranges
USA: 2 W - 217-220 MHz;
4 W - 220-222 MHz
Canada: 4 W - 217-218 MHz and 219-220 MHz;
4 W - 220-222 MHz
Channel Bandwidth
25/12.5/6.25 kHz (USA)
12.5/6.25 kHz (Canada)
25/20/12.5 kHz (EU)
Data Rate (25/20/12.5/6.25 kHz
Channel Bandwidth)
9600/7500/4800/2400 bps – BPSK/GMSK
19200/15000/9600/4800 bps – QPSK
28800/22500/14400/7200 bps – 8PSK
38400/30000/19200/9600 bps – 16QAM
System Gain for BPSK
modulation (Antenna gain is not
included)
161 dB (for 25 kHz Channel Bandwidth)
163 dB (for 12.5 kHz Channel Bandwidth)
164 dB (for 6.25 kHz Channel Bandwidth)
Roaming Speed for BPSK modulation
75 mph / 120 km/h
Modulation
GMSK/BPSK/QPSK/8PSK/16QAM
Nominal Impedance
50 Ohms
End to End delay
60 ms
Communication Mode
Time Division Duplex (TDD)
Time Division Multiple Access (TDMA)
Maximum Distance Range
16 miles / 26 km
Serial port
Serial (RS-232) up to 115200 bps.
Serial port configurable as RS-232 and
RS-422, or RS-485
USB
USB 2.0 device port (12 Mbps)
Bluetooth
Bluetooth V2.0 Class 2 supporting SPP Slave and
Master Profiles
Bluetooth Antenna
Embedded
