Configuration Of Twrb/Twrr Receiver; Configuration Trimmers And Jumpers; Configuration Procedure; Default Configuration - Videotec TWRB Manuel D'instructions

Configuration of TWRB/TWRR receiver

Configuration trimmers and jumpers

In the following drawing, identify the configuration trimmers and jumpers :
AC / DC
power supply
Video signal led
MF-III fine adjustment
Power supply led
Video
output
Linear gain regulator
Twisted pair

Configuration procedure

The following procedures must be carried out with power supply off, if not otherwise specified
The configuration procedure prepares the unit for perfect working and must be carried out only by qualified
technical staff. The operations to perform during the configuration phase are the following :

1. Default configuration

2. Input impedance adjustment
3. Video output adjustment
Default configuration
In this configuration there is no amplification, adjustment or symmetry and it corresponds to the factory setting
(if the device has never been used pass to the next paragraph); before starting to regulate the device we advise setting
it in default configuration by positioning all the trimmers and dip-switches in the following positions:
Where to operate : Trimmers TP1,TP2,TP3,TP4, Trimmers TC1,TC2,TC3,TC4, Dip-switches SW1, SW2
Adjustments :
1. Set trimmer TP2 to the median position
2. Set trimmer TP3 to the median position
3. Set trimmer TP4 completely to the left, turning it anti-clockwise
4. Position switches from 1 to 8 of SW1 in the OFF position
5. Position switches from 9 to 15 of SW2 in the OFF position
GND
OUT
input
Pag. 4
LF-III End adjustment
HF-III End adjustment
LF Gain adjustment
HF Gain adjustment
HF Loss (short distances)
Symmetry adjustment
Input impedence adjustment
TWRB/TWRR 2701