6800/7000 Series - Audio and Video Multi/Demultiplexing Products Installation and Operation Manual
75
Operations
Chapter 6: DEC-6801/DES-6801 Decoder with Frame Synchronizer Module
Jumpers
•
The
Input Termination
jumper is used to terminate the input video.
•
The
Fs Clk
jumper is used to enable the frame synchronization
clock. It must be used when the DEC- 6801 module is equipped with
the 6801FS, 6801FS-1, 6801FS-2 or 6804FS sub-module.
•
The
Dec Clk
jumper is used when the DEC-6801 module is used as a
decoder only.
•
Frame
ID is made possible by reading the silicon serial number if it is
installed in the RJ11 at the back of the frame. The two
Off/On
jumpers are shipped in the
Off
position from the factory and must
both be
On
to enable frame ID.
Switches
SW4
and
SW5
can be used to
identify
the frame ID if the silicon serial
number is not installed. There are 256 possible numeric combinations
provided by these switches.
Frame ID
Frame ID is read by the microcontroller on power up in the following
sequence:
1. The microcontroller first tries to read the frame ID from the silicon
serial number DS2401 placed in the RJ11 at the back of the frame.
2. If the silicon serial number is not installed, the frame ID is read from
SW4
and
SW5
, which are placed on the DEC/DES-6801 module and
set appropriately by the user.
The user must use either the FS
CLK or the DEC CLK jumper.