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The PIP/Double Window panel allows for both a standard PIP window and a split screen. The
PIP/Double Window module has a separate Tuner, SAW filter, and Signal Processor. The output of
the Signal Processor, 7301, on Pin 16 is fed to switching IC 7402 which selects between the PIP
Tuner and Composite Video from the SSB. Selected Composite Video for the main picture is output
on Pin 15 of 7402 and is fed to the SSB. Selected Composite Video for the PIP window is output on
Pin 14 and is buffered by 7421. It is fed to 1333, 4.5MHz Trap. It is then buffered by transistor 7331
before being fed to Pin 24, which selects between the selected Tuner Video or selected Composite
Video from the SSM. Composite Video is fed to a YC separator, then to a Delay Line and
Demodulator. If it is a YC signal, it bypasses the YC separator. The YUV signal is then fed to the YUV
switch, which selects between the output of the Delay Line and Demodulator, and external YUV from
the Large Signal Board. The YUV (SY, SU, and SV) is output to the PIP processor IC. Selected
Composite Video is fed to the V-Chip processor. V-Chip processing for the main picture is done by
the Microprocessor on the SSB.
Double Window Output
Figure 17
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