Crystal Vision
Introduction
20/09/05
2
DDAA246 User Manual V1.10
1 Introduction
The DDAA246 is a dual 8-bit Serial Digital to Analogue Composite converter with re-
clocked serial and analogue outputs.
The universal connection system allows a mixture of Crystal Vision modules in the frame.
The modules plug in the front and the rear connectors plug in the rear. Depending on
frame design, a hinged or removable front panel reveals LED indication of input and PSU
status when opened.
DDAA246 serial digital to analogue converter
The DDAA246 may be used with the RM01 single slot rear connector, the RM02
quadruple slot rear connector and the RM18 double slot rear connectors. The RM01
allows the highest frame packing density, with reduced output connections, whilst the
RM18 and RM02 provide more outputs but with reduced packing density. Only the RM18
with 12 BNCs per module allows access to all module connections.
The RM01 allows 12 modules to fit in a 2U frame, the RM02 allows 9 modules to fit in a
2U frame and the RM18 allows 6 modules to fit in a 2U frame.
The analogue outputs can be switched between input video and an internal test pattern
under local or remote (GPI) control. It accepts either 625 or 525 line input, with automatic
detection.
