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SSB Video Switching
Figure 11
Selected Composite video from the SSM is fed to HIP 7323 located on the SSB. IF from the main Tuner located on the SSM is
fed to the SSB via connector 0302 to the SAW filter 1408 and to Pin 2 and 3 of 7323. Composite Video is output on Pin 10 and
is buffered by 7411 before being fed to the PIP panel via the SSM in the Basic version only. In the two tuner versions, Basic+
and Core, the tuner on the PIP panel tunes to the channel selected by the user for the PIP window. There is no second Tuner in
the Basic version. Video for the main picture is fed through 4401 to 1407. Composite video from 1407 is fed to transistor 7322
and to Pin 14 of 7323 to an internal switch, which selects between the Tuner video and selected Composite video or Y. If it is a
YC signal, the Y signal is internally selected and fed to a Delay and YUV switch. Chroma or C is fed to Pin 21 and is fed to the
Demodulator and to the YUV switch. Selected Composite video is output on Pin 26 and is buffered by 7320. In the Basic
version, the Composite video is fed to 7307, a three-line Comb Filter, for YC separation. In the Basic + and Core versions, the
Composite video is fed to a 3D Comb filter located on a separate panel. YC is then fed back to the HIP on Pins 28 and 29. The
YUV switch selects between the YUV from the internal decoder or YUV from the Y Pb Pr inputs located on the SSM. The
Microprocessor located on the SSB via the I2C buss, SDA-F and SCL-F, controls the HIP, 7323. The Y Pb Pr signals for NTSC
are fed through buffer amplifiers on the SSM before being fed to the SSB. The selected YUV signal is output on Pins 49, 50,
and 51 to the PIP/DW circuit via connector 1682.
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