5 (E)
Functions of the BKPF-205/205R
The BKPF-205/205R is a video/audio multiplexer
board that converts analog audio signals to digital
audio signals and multiplexes the converted signals
with a 4:2:2 component or 4fsc NTSC composite serial
digital video signal.
With a single BKPF-205/205R board, multiplexing of
audio signals of 4 channels is achieved, and the
multiplexed signal is distributed to two outputs.
For a 4:2:2 component serial digital signal, another 4
channels can be added for multiplexing of a total of 8
channels by cascading two BKPF-205/205R boards.
Serial digital video signal selection
Switching between 4:2:2 component and 4fsc NTSC
composite is achieved via the internal D1/D2 (SDI
signal selection) switch on the board.
Note
Because of the limited space to indicate the signal
formats, 4:2:2 component is referred to as “D1” and
4fsc composite as “D2” in the indications on the board.
Multiplexing audio group selection (with 4:2:2
component serial digital video signal
selected)
For a 4:2:2 component serial digital video signal, it can
be determined whether the audio signals of 4 channels
supplied to the ANALOG IN AUDIO connectors are
to be multiplexed as group 1 (channels 1 to 4) or as
group 2 (channels 5 to 8), using the internal GP1/GP2
(audio group selection) switch on the board.
Note
It is possible to multiplex digital audio signals of group
2 only with a 4:2:2 component serial digital signal on
which audio signals of group 1 have already been
multiplexed.
Thus, if two boards are to be cascaded, set the first
board for group 1 and the second for group 2.
Multiplexing audio channel selection
Multiplexing of audio signals can be canceled
individually for each two channels, channels 1/2 (or 5/
6 in group 2) or channels 3/4 (or 7/8 in group 2) with
an internal switch setting.
Audio mute function
Audio signals can be muted as logical silent signals
individually for each two channels, channels 1/2 (or 5/
6 in group 2) or channels 3/4 (or 7/8 in group 2) with
an internal switch setting.
Function selection for channels 3/4
Audio signals of channels 1/2 (or 5/6 in group 2) can
be duplicated to channels 3/4 (or 7/8 in group 2) with
an internal switch setting.
Using this function, you can multiplex two-channel
audio as four-channel audio even when audio signals
only of one pair/two channels are supplied. Channels
3/4 (or 7/8) are also processed (muted) as logical silent
signals.
Summary of Contents for BKPF-105A
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