Maintenance; Problem Solution; Specifications - Videotec TWRB Manuel D'instructions

Maintenance

TWRB/TWRR receiver does not need a special maintenance.
Make sure it always rests on a solid base, and that the power supply and connection cables do not hinder the operator.

Problem solution

Even if TWRB/TWRR receiver is very easy to use, some problems may arise during installation, configuration or use.
Problem
On switching on, the green
LED is off.
On switching on, the red LED
is on (no video signal present)
On switching on, the red LED
is off but no output video
signal is displayed.

Specifications

Power supply:
Video input:
Video output:
Input impedence:
Frequency response:
CMRR:
Gain:
Signal/noise ratio:
Imput protection:
Power supply protection:
Dimensions:
Protection:
Possible cause
Power supply disconnected
Incorrect connections
The receiver TWRB/TWRR does not work
The transmitter TWT does not work
The monitor does not work
Incorrect connection between
TWRB/TWRR and monitor
20 V --- 30 V, AC / DC, 100mA max (refer to identification data)
0.12 Vpp - 2 Vpp adjustable by trimmer TP3
1 Vpp, 75 Ohm
45 Ohm / 175 Ohm adjustable by trimmer TP1
50 Hz - 5 Mhz ( -0.3 dB )
> 70 dB, 50 Hz adjustable by trimmer TP2
adjustable from +6 dB to +60 dB
> 50 dB at 40 dB of gain
> 47 dB at 60 dB of gain
Gas dischargers and Zener diodes
Varistor
160x55x80 mm
IP-65 (VDE)
Pag. 8
Remedy
Check power supply cable
Check the connections as described in
the chapter Connections
Carry out the regulation procedure
described in the chapter Configuration
of the receiver
See the Operating Instructions for the
TWT transmitter
Check the monitor
Check the connections
TWRB/TWRR 2701