APPEAR AS
Confidential
162/352
7.4
M
ODULATOR
C
ONFIGURATION
The Quad Decoders ’tvmod’
card supports various PAL, NTSC and SECAM modulation standards. It is possible to
select the modulation mode via
Decoders
→
>Modulators-> Modulators Setup
in the GUI.
7.4.1
C
ARRIER OFFSET IN
TVMOD
For a number of TV sets, their demodulators may introduce noise in the picture due to inter-modulation between
signal components. A solution to this is to offset the channel frequency and/or the audio carrier frequency.
This can be enabled and adjusted on the
Decoder-> Modulator->Modulation offsets section
. All defaults are off.
OIRT: Channel offset
Enable checkbox, Frequency (-16->16 KHz) : Default OFF, 8Khz
ITU: Channel offset
Enable checkbox, Frequency (-16->16 KHz) : Default OFF, 8Khz