T6-D-USER-RV-EN
Page xiii
© Park Air Systems Limited 2017
Glossary of abbreviations, acronyms and technical terms (continued)
Variation in packet transit delay
An extremely high stability RF frequency source, for example GPS
Ohm
unit of resistance
Phantom PTT
DC control voltage applied to transmit audio input lines
Phantom squelch DC control voltage applied to receive audio output lines
pk-pk
peak to peak
ppm
parts per million
PTT
press-to-transmit or push-to-talk
remote control and monitoring system
8 position 8 contact (8P8C) connector
rms
root mean square
RRC
radio remote control
received signal strength indication
Differential signalling standard
Differential signalling standard for networks
Rx or RX
receiver
simultaneous call transmission
SDR
software defined radio
Self-receiving
The radio outputs its transmitted audio on its receive audio lines
Simple Network Management Protocol
receive audio/audio level is stopped
Defines the division between network and host parts of an IP address
single frequency tone applied to transmit audio input lines used as the PTT signal
single frequency tone applied to receive audio output lines used as the squelch signal
TR
transceiver
Tx or TX
transmitter
UHF
ultra high frequency
USB
universal serial bus
V
Volt
VA
Volt-Ampere
voice communications control system
VDL Mode 2
VHF air-ground Digital Link, data transmission Mode 2
VHF
very high frequency
VSWR
voltage standing wave ratio
W
Watt
Analogue transmit and receive audio with squelch and PTT signalling
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