Crystal Vision
Card edge operation
20/09/05
4
DDAA246 User Manual V1.10
2 Card edge operation
The front edge of the DDAA246 card provides power rail monitoring, signal status, gain
adjustment and configuration switches.
DDAA246 front edge view
The 8-way front edge switch provides access to the following:
•
Test – for each channel, composite output is test pattern or SDI input
•
525 – for each channel, force standard if board is NOT in AUTO
•
VBI – for each channel, blank or unblank VBI data
•
SET – for both channels, apply 7.5 IRE in NTSC
•
CBW – for both channels, change chroma bandwidth
Lever
Up
Down
1
TEST A
Composite output is incoming SDI data
Composite output is modulated ramp test pattern
2
525 A
625-line if manual selected on jumper PL4
525-line if manual selected on jumper PL4
3
VBI A
Blank PAL lines 7 to 22 & 320 to 335,
NTSC lines 10 to 20 & 273 to 282
Unblank PAL lines 7 to 22 & 320 to 335, NTSC
lines 10 to 20 & 273 to 282
4
SETUP
No setup
Adds 7.5 IRE of setup to Y & reduces Y gain as
required. Only affects 525-line output
5
C BW
Chroma Bandwidth 1.3MHz
Chroma Bandwidth 650kHz
6
TEST B
Composite output is incoming SDI data
Composite output is modulated ramp test pattern
7
525 B
625-line if manual selected on jumper PL5
525-line if manual selected on jumper PL5
8
VBI B
Blank PAL lines 7 to 22 & 320 to 335,
NTSC lines 10 to 20 & 273 to 282
Unblank PAL lines 7 to 22 & 320 to 335, NTSC
lines 10 to 20 & 273 to 282
