Philips DPTV305, Руководство пользователя

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PIP
There are two different PIP versions in the HDR2002. The Basic and Basic Plus versions use a
Standard Single window PIP. The Core Versions have a Double Window PIP that is capable of
showing a Standard PIP, small window, or a double window, split screen.
Standard PIP Signal Flow
Figure 13
The Standard PIP comes in two versions: Single-Tuner with no tuner on the PIP panel and two- tuner
versions with the second tuner located on the PIP module. Output of the second tuner is fed to the
SAW FILTER 1901, and to the Signal Processor 7914. Composite Video is output on Pin 7 and
buffered by transistor 7918. If the set has two-tuners, the video is output through jumper 9906 to
buffer transistor 7920. If the set is a single-tuner version, video from the SSB is fed to 7920 via jumper
9902. Video is then fed to 7801, which selects between the output of 7916 or from selected composite
video from the SSM. The output of 7801 is buffered by a four-transistor amplifier before being fed to
Pin 22 of 7803, PIP processor. The PIP processor is controlled by the I2C buss (SDA and SCL) from
the SSB Microprocessor. It is kept in sync by the Vertical sync pulse (VFB) and the Horizontal sync
pulse (SANDCASTLE). The PIP window video is output as YUV to the YUV switch, 7919. The signal
is combined with the main picture YUV from the SSB panel on connector 0205. The combined YUV
signal is output on Pins 12, 11, and 10 to the SSB.