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WISI
COMPACT LINE
Operating instructions
© WISI Communications GmbH & Co. KG
-20-
VX 52 B / VX 53 B series
RF amplifier - single output stage
4.3.2 Upstream amplifier modules
Socket
(10)
WISI
type
Description
Notes
VX 50 B 0650 Upstream amplifier module,
65 MHz
pre-equipped in
VX 52 B CC / VX 53 B CC,
VX 52 B CH01 / VX 53 B CH01
VX 50 B 2040 Upstream amplifier module,
204 MHz
XE 53 B 0650
65 MHz filter board for upstream
amplifier module
part of VX 50 B 0650
XE 53 B 2040
204 MHz filter board for up-
stream amplifier module
for upgrading a VX 50 B 0650
to 204 MHz
4.3.3 Upstream level and slope alignment
Upstream high pass filter
In order to suppress low-frequency disturbances in the upstream transmission spec-
trum, a 12 MHz high-pass filter can be activated. If payload carriers populate the
spectral range 5...12 MHz, the filter should stay disabled.
BT app:
UPSTREAM > US [1/2] 12 MHz HP >
[on] / [off]
default: [off]
Handset: Upstream [1/2] > US HighPass[1/2] >
Ingress control switch (ICS)
BT app:
UPSTREAM > US [1/2] ICS >
0 / -6 / -45 dB
default: 0 dB
Handset: Upstream > US ICS[1/2] >
Upstream input attenuator
BT App:
UPSTREAM > US [1/2] Input Att. >
0 ... 30 dB
1.0 dB steps
Handset: Upstream > US InputAtt[1/2] >
Upstream slope
BT App:
UPSTREAM > Slope >
0 ... 15 dB
0.5 dB steps
Handset: Upstream > US Slope >