Crystal Vision
Hardware installation
35
DEC102SUser ManualV1.0 05/11/03
5.3 Module configuration
The DEC102S has jumper links and analogue gain adjustments present on the module
PCB. Many of the jumper links are set in conjunction with the front card edge controls.
Analogue gain settings are pre-set at the factory and should not require re-adjustment.
DEC 102S showing jumper link positions
Loop or terminate the external reference
The external analogue reference may be terminated with 75
Ω
or allowed to provide a loop
through output. Set jumper link J1 at the bottom right hand corner of the module to the
lower position (as shown) to terminate the external reference. Set jumper J1 to the upper
position for a loop through output.
Link
Position
Select loop through or termination of reference syncs
J1
Bottom right hand corner
near edge connector
Link to the top – ext syncs looped through
Link to the bottom – ext syncs terminated on board
Card-edge control - video standard and 8/10 bit jumper location
When the module is operated from the card-edge controls, the video standard and 8/10 bit
modes can be forced by using jumper links J3 and J5 in conjunction with the four-lever
switch on the card edge.
Link
Position
Function
J3
Towards edge connector
Manually select video standard when piano switch 2 is DOWN
Link to the rear – forces 625 line standard
Link to the front – forces 525 line standard
J5
Board centre
Manually select 10 or 8-bit operation when piano switch 1 is DOWN
Link to the rear – forces 8-bit operation
Link to the front – forces 10-bit operation
