4.8.5 The VB272 Dual DVB-S/S2 Demodulator Module (VB220 option)
The VB272 DVB-S/S2 Demodulator is an optional input interface module capable of receiving DVB-S
(QPSK) and DVB-S2 (8PSK, 16APSK, 32APSK) signals. The module has two RF inputs. The second
input can be activated through a software option key.
The connectors are:
DVB-S/S2 1: RF L-band input with DiSEqC 1.2 – 75 ohm F-connector
DVB-S/S2 2: RF L-band input with DiSEqC 1.2 – 75 ohm F-connector
GPI: Alarm relay output – 9 PIN D-sub male
Two LEDs indicate whether the demodulators lock to the incoming RF signals or not.
4.8.6 The VB273 DVB-S/S2 Redundancy switch (VB220 option)
The VB273 DVB-S/S2 satellite IF redundancy switch is an input module capable of automatically switching
between two IF input signals for redundancy purposes. It is meant to be paired with a VB272-SMA
DVB-S/S2 input module described in an earlier section. The VB273 module has two 75 Ohm BNC IF
inputs; one 75 Ohm BNC IF output and two 50 Ohm SMA RF outputs.
The module contains two built-in up-converters to L-band for monitoring purposes. The L-band signal
versions of the input IF signals are available on the two 50 ohm SMA connectors marked RF OUT 1 and
RF OUT 2. These signals are permanently connected via supplied loop cables to the neighboring VB272
Satellite input module.
Chassis setup:
28 VB2xx GigE User’s Manual version 5.4
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