Switching On And Off; Maintenance; Problem Solution; Specifications - Videotec TWM Manuel D'instructions

Switching on and off

Before connecting the appliance:
• check that the material supplied corresponds to the specifications indicated on the data plate, following the chapter
Identification data
• check that TWM transmitter and the other components of the installation are closed in order to avoid direct contact
with energized parts.
• make sure that all the parts are fixed in a solid and reliable way
• check that the electrical capacity and the connection cables will support the system power consumption
SWITCHING ON: the transmitter has no switch : connect the unit.
SWITCHING OFF: disconnect the unit

Maintenance

TWM transmitter 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 TWM transmitter is very easy to use, some problems may arise during installation, configuration or use.
Problem
At the switching on, the video
signal is not displayed in the
output

Specifications

Power supply:
Video input:
Video output:
Output impedence:
Frequency response:
Pre-amplifier:
Power supply protection:
Diameter:
Lenght (BNC and terminal blocks included): 61mm
Possible cause
Power supply disconnected
Incorrect connections
The TWM transmitter does not
work
The TWRB/TWRR receiver
does not work
12-24 V, AC/DC 20mA max (refer to identification data)
1 Vpp, 75 Ohm
2x2 Vpp
125 Ohm / 90 Ohm (J1)
30 Hz - 5 Mhz ( -0.5 dB )
+10 dB, 5 Mhz (J2)
Varistor
Ø 25mm
Pag. 7
Remedy
Check the power supply cable
Check the connections according to what
described at chapter Connections
Use an oscilloscope to check for the presence
of a +2 Vpp open circuit signal between points
A and B
Refer to TWRB/TWRR manual
TWM 2701