5
ATB 19x
Part N
o
: 9848.xx
ASI - TV Transmodulator
ASI
→
ATV (AM)
Function description
The analogue TV - IF signal (picture and sound carrier) will be split after the main selection (SAW filter) and transported to the IF -
output socket. The processed signal will go from the IF input socket over an absorption- and adjustment unit directly to the upward
mixer. It has to be considered that no other channel selective filter stages are located in the input signal path and no level adjustments
and/or level control possibilities are available..
For the normal function of the interface, the conditions defined in the manual instructions have to be considered!
Operating instructions
1. The IF input level may only vary ±1 dB from the IF output level (95 dBμV). External IF modules may not change the level of the
signal and/or have to provide the necessary level at the output!
2. The external IF module, which is used for the processing and/or feeding of the IF signal, may not produce any spurious, which fall
below the necessary signal-to-noise ratio (>60 dB). If necessary, an additional IF filter has to be connected between the output of
the external module and the IF interface input..
3. If a module with IF interface is mounted to the wall, the usage of SMA angle plugs for the interface side of the connection cable is
recommended. The cables have to be screwed onto the interface socket before installing the module.
4. The connection cables and the plug connectors for the external IF modules, as well as their IF connections must have an impe-
dance of 75 ohm (e.g. RG 179 B/U with 75 ohm - BNC - plug connections).
5. To bypass the IF interfaces, the interface sockets have to be connected with a short cable (jumper). An internal module bypass
(e.g. by a jumper) is not possible!
Technical data
Output / input frequency (picture carrier analogue TV)
38,9 MHz
Frequency range 32,15 ... 40,15 MHz
Output / input level
95 dBμV
Impedance 75 Ω
Connector
2 x SMA socket
IF decoupling
≥ 80 dB
8.2 Additional A/V monitor outputs
These options have in comparison with the relevant basic variant a video output and two audio outputs for monitoring. The additional
outputs are located in the upper part of the front side and are implemented as MCX sockets.
The following device variants are equipped with additional A/V outputs:
9848.08
9848.24
9848.25
Front view
ASI-TS input port
LED input
ASI-TS output port
LED output
Audio output L,R
Video output
Operating voltage/
control bus
“STANDBY“ LED (red)
“READY“ LED (green)
“ADDR.“ LED (yellow)
Adress selector switch
RF output for TV
