NORTHROP GRUMMAN Park Air T6-RV, User Documentation

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T6-D-USER-RV-EN Page xiii
© Park Air Systems Limited 2017
Glossary of abbreviations, acronyms and technical terms (continued)
Network jitter Variation in packet transit delay
Off-air standard An extremely high stability RF frequency source, for example GPS
Ohm unit of resistance
OLED organic light emitting diode
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
RCMS remote control and monitoring system
RF radio frequency
RJ45 8 position 8 contact (8P8C) connector
rms root mean square
RRC radio remote control
RSSI received signal strength indication
RS422 Differential signalling standard
RS485 Differential signalling standard for networks
Rx or RX receiver
SCT simultaneous call transmission
SDR software defined radio
Self-receiving The radio outputs its transmitted audio on its receive audio lines
SNMP Simple Network Management Protocol
squelch receive audio/audio level is stopped
subnet mask Defines the division between network and host parts of an IP address
Tone keying single frequency tone applied to transmit audio input lines used as the PTT signal
Tone squelch single frequency tone applied to receive audio output lines used as the squelch signal
TR transceiver
TTL transistor-transistor logic
Tx or TX transmitter
UHF ultra high frequency
USB universal serial bus
V Volt
VA Volt-Ampere
VCCS voice communications control system
VDL Mode 2 VHF air-ground Digital Link, data transmission Mode 2
VHF very high frequency
VoIP Voice over Internet Protocol
VSWR voltage standing wave ratio
W Watt
4-wire E & M Analogue transmit and receive audio with squelch and PTT signalling