SW Version 2.04 30-January-2009 Page 7 of 128
Data from backplane
IP output
board
MOD 2
MOD 1
QAM
Modulator
board
Data to, and SNMP control
of Modulator
The QAM modulator
consists of two modulator
chips which each carries
up to 4 carriers. The
Frequency is set for the
the first carrier of each
modulaotr only, the
remaining three per
modulator follows in
regular spacing.
Figur 3 - QAM Modulator
3.4.4 Decoder with Composite Output
3.4.4.1 Video Output
For modules with composite output, the upper BNC is video A while the lower BNC is
video B.
The dual decoder with composite out is 1 or 2 slots wide.
3.4.4.2 Audio Output (1 slot decoder module)
The 1 slot composite video output card has a DSUB9 male connector for audio,
carrying both services. The pin out of the male connector is shown below.
Pin 1 Audio 1 Right positive
Pin 2 Audio 1 Right negative
Pin 3 GND GND
Pin 4 Audio 2 Right positive
Pin 5 Audio 2 Right negative
1
2
3
4
5
6
7
8
9
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