VBS 2020 RX-3
Triple optical video receiver
USER MANUAL
1. General description
The VBS 2020 RX-3 plug-in module contains three
identical optical video baseband receivers. Optical
input to each of these separate analogue receivers is
converted into the electrical video equivalent.
Signal integrity is preserved with the aid of
automatic gain control and video clamping, making
installation and operation adjustment-free. The
units receive at an optical wavelength of 850 nm
and must be connected to multimode optical fibre.
The 7TE modules will slot into the backplanes of
Optelecom-NKF's MC 10 or MC 11 power supply
cabinets. Details specific to the stand-alone option
(/SA) are described in a supplementary manual.
VBS 2020 RX-3 receivers are suitable for use in
combination with ADV transmitters/receivers,
allowing inclusion of two independent streams of
digital data and/or high quality audio in each video
signal.
2. Indicators and connectors
Figure 1 shows the signal connection facilities and
indicators on the front panel of a VBS 2020 RX-3
receiver module (see also table 1).
o
→
, 3x
video
output
(75
Ω
BNC
conn.)
o
←
, 3x
optical input (ST connector)
Status indicator LEDs
* DC
DC power supply
* NV
,
3x
no video at output
Table 1. Indications and connectors on the front panel
of the VBS 2020 RX-3
3. Installation instructions
1.
VBS 2020 RX-3 units should always be used in
combination with Optelecom-NKF power
supply cabinets; for /SA version, please consult
the supplementary manual.
2.
Plug the module into the power cabinet and
connect suitable video and optical fibre
equipment to the modules.
3.
After activating the power supply, at least the
green DC LED on the front panel should glow.
4.
Upon feeding an optical RX-3 input with a
proper signal, the corresponding NV LED (red)
should go out.
If this is not the case, please
check the optical link
4. Care and maintenance
In order to maintain reliable operation of the
module, please observe the following:
- Prevent dust from collecting on the equipment
- Protect the equipment against moisture
- Maintain sufficient free space around the equip-
ment for cooling.
General safety and EMC information will be found
in the final section of this document.
Figure 1.
VBS 2020 RX-3
front panel layout
VBS RX-3
DC
CH1
CH2
CH3
NV
NV
NV
VBS RX-3
DC
CH1
CH2
CH3
NV
NV
NV
