User Manual

VoiceXtender Modem Installer’s Guide
Specifications
Rev. A - 8/97 A-5
Table A-8
General Radio Frequency Specifications
Parameter Specification
Frequency Range 902 - 928 MHz
Radio Technology Spread Spectrum using Direct Sequence
PN Sequence Length 32 bits
Modulation Technique Bi-Phase Shift Keying (BPSK), Non-Coherent
Receiver
Channel Bandwidth 5.1 MHz
Transmission Delay 5.1 msec
Sync Word Length 16 bits
Processing Gain 12 dB
System Gain
(not including antenna gain)
127 dB
Transmission Distance Up to ~10 miles with 2 Yagi directional antennas and
a direct line-of-sight.
Table A-9
Transmitter Specifications
Parameter Specification
Number of RF Channels (switch
selectable)
10 ( all non-overlapping)
Frequency Source Synthesized
Bandwidth 2.6 MHz
Carrier Frequency Stability ± 10 ppm
Output Power (switch selectable)
Tolerance
29 dBm (800 mW) maximum with
29 dB of dynamic range
± 1dB over all RF channels
± 1 dB from 0 to 50° C