![background image](http://html1.mh-extra.com/html/snell-and-wilcox/hd5050/hd5050_operators-manual_1309054047.webp)
HD5050
SECTION 5
HD5050070999 Version 1 Issue 4
For Software Version Z5 onwards
5.1
Appendix
RollTrack Audio Delay Tracking
RollTrack is a feature of RollCall™ (Snell & Wilcox’s proprietary remote control system), that allows devices to
communicate across the RollCall network with no direct user intervention.
RollTrack Audio Delay Tracking enables Snell & Wilcox RollCall™ compatible audio delay products to track
delay introduced by RollCall™ compatible video processing products.
The current products that implement RollTrack Audio Delay Tracking are:
Audio Delay Modules
Video Modules
Other Products
IQBAAD
IQD1FSY
ALCHEMIST
MDD3000
IQBADC
IQDMSDS
CPP100
MDD550
IQBDAC
IQDAFS
CPP200
MDD560
IQBDAD
IQDMSDS
NRS500
MDD570
IQBSYN
IQDMSDP
HD5050
MDD2000
IQBADCD
The simplest configuration is a single video unit and a single audio delay in a RollCall™ system. The audio
delay will have the same delay as through the video path. If the delay changes the audio delay will track.
IQD1FSY
IQBADC
RollCall connection
4:2:2
Analogue
Audio
delayed video by 10 ms
delayed audio by 10 ms
The next level of configuration is where there are multiple Frame Synchronizers (for example) each connected
through RollCall™ to their own tracking Audio Delay. (It is worth stating that the synchronizers and audio
delays do not have to be in the same enclosure; the addressing scheme, discussed later, allows for the units to
be positioned anywhere in the RollCall™ domain.)
The maximum number of video units and audio delays in a RollCall™ system is set by the maximum limit of the
number of modules in a RollCall™ network and is currently 3840 on a single network without bridges.
The unique identification of the destination unit (a decimal number) for various modules is as follows:
Module
ID
IQBADC
51
IQBDAC
52
IQBAAD
53
IQBDAD
54
IQBSYN
89
IQBADCD
107