3
PREFACE
The video twisted-pair transmitter TT 101 is a
correction amplifier with the standard
asymmetrical video input and symmetrical output
which is adjusted to connect the twisted-pair
cable. It is mounted in ABS casing. There is a
small metal saucer inside of the casing and the
transmitter can be easily installed into the casing
of a video camera for outdoor use. The choice of
output impedance allows the use of different kinds
of cables.
FEATURES
•
small dimensions
•
simple connecting
•
AC/DC power supply
•
low power consumption
•
over-voltage protection
•
dual output impedance
•
pre-em10 dB / 5 MHz
BLOCK DIAGRAM
PRINCIPLE OF OPERATION
The input is closed with the impedance of 75
Ω
.
The clamping is set with the trimmer TP1. Then
follows the stage which defines the pre-emphasis.
By means of the symmetry stage two signals
separated by 180
°
appear, which are led to the
output stages A and B.
The output impedance jumper enables a choice of
output impedance - 125
Ω
or 90
Ω
.
The power is supplied by connecting to the AC or
DC power supply unit.
