Crystal Vision
Hardware installation
31
DEC101SUser ManualV1.0 05/11/03
5.3 Module configuration
The DEC101S 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.
DEC101S 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
left (as shown) to terminate the external reference. Set jumper J1 to the right for a loop
through output.
Link
Position
Select loop through or termination of reference syncs
J1
Bottom right hand corner
near edge connector
Link towards edge connector – ext syncs looped through
Link away from edge connector – ext syncs terminated on board
Card-edge control - video standard
When the module is operated from the card-edge controls, the video standard can be
forced by using jumper links J3 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