Grass Valley Profile Analog Composite Monitor - Manual (Page 28)

Monitor Board Installation
28 Analog Composite Monitor Installation
Audio Clock Cabling
NOTE: The Analog Composite Monitor board does not require audio clock
cabling. Audio clock cabling information is included here in the event that
you have to move boards around.
This section provides information about audio clock cabling. In general, if all your
audio/video devices are connected to house reference, audio clock cabling is not
required. The need for audio clock cabling arises when an external audio clock
signal from the appropriate video board must be used to synchronize the audio to
the video. Cabling between connectors on the top of the video boards and
connectors on the top of the ASPB provide the external audio clock signals.
ASPB Audio Clock Cabling
The ASPB provides for input of four external audio clock signals, one to each
Audio 1-Audio 4 bank, where each bank consists of four audio channels. ASPB
Audio 1-Audio 4 connectors begin closest to the rear panel and go toward the front
panel.
In general, the video board in the lowest numbered slot must provide the audio
clock signal to the Audio 1 bank, the video board in the next lowest numbered slot
must provide the audio clock signal to the Audio 2 bank, etc. For example, if you
have video boards in slots J5 and J11, the audio clock signal from the one in J5
must be connected to Audio 1 on the ASPB and the audio clock signal from the
video board in slot J11 must be connected to Audio 2 on the ASPB.
Figures 4 and 5 show examples of external audio clock cabling with the ASPB. In
Figure 4, Analog Composite I/O boards, installed in slots J14 and J15, are the only
video boards. The audio clock cable connections are:
• Channel A of the board in slot J14 to Audio 1 on the ASPB in slot J13
• Channel B of the board in slot J14 to Audio 2 on the ASPB in slot J13
• Channel A of the board in slot J15 to Audio 3 on the ASPB in slot J13
• Channel B of the board in slot J15 to Audio 4 on the ASPB in slot J13