User's Manual Part 3

RBS 2109 User’s Guide
⇒ Burst
TT
Total Time
TU Timing Unit
TX
Transmitter
TXA
Transmitter Antenna A
TXB
Transmitter Antenna B
TXBP
Transmitter BandPass filter
TXU
Radio Transmitter Unit
UAS
Unavailable Seconds
UAST
UnAvailable STate supervision
UL
Underwriter Laboratories
uplink
Signalling direction from the MS to the system.
UPS
Uninterrupted Power Supply
VCO
Voltage Controlled Oscillator
VSWR
Voltage Standing Wave Ratio RF signal measure. The
quotient between transmitted and reflected voltage.
X bus
The X bus carries transmit air data frames between
transceivers.
Y link
The interface between the DXU and each DSP System
in core based TRUs.
239EN/LZT 720 0090 Uen R1A 2004-09-17