Table of Contents
Advertisement
DCD-8 User Manual
12.1. DOMAIN B VSO
Domain B can be independently in VSO mode.
However, if set to "Use REF A" and if domain A is in VSO mode, then domain B will track
the VSO speed setting of domain A. So A could be 48000, and B 44100, and both
VSO'd up 100 cents by adjusting the REF A VSO setting. (NOTE: the long term relative
accuracy of the two rates is considerably reduced in this mode.)
12.2. VSO & THE VSG-4 OPTION CARD
With the VSG-4 option card installed, when SD only is enabled (menu 52), VSO opera-
tion in domain A is prohibited as the SD video cannot track the varying wordclock rate.
The VSO option will not appear in menu 02.
To eliminate this conflict, if the video outputs are not being used, switch off the video op-
tion. For more on this, please refer to the VSG-4 User's Manual.
When the HD and SD outputs are enabled and the VSG-4 has taken over REF B, domain
A VSO is allowed.
the Ref A rate prior to VSO. As a result, the video sync "edge" alignment to the word
clock will be turned off (see VSG-4 User Manual).
13. Source Reference Failure Options
In the event of failure of the external reference, the DCD-8 has 2 different ways of insuring
that the WC output remains safely uninterrupted.
13.1. MAIN REFERENCE FAILURE WITH NO ALTERNATE REFERENCE SET
If no alternate reference was set in menu 03, the DCD-8 holds the last known frequency
and displays "HOLDING" as a lock status.
If a signal is still present at the main reference input, the DCD-8 automatically attempts to
ues holding and attempts to Lock to the main reference again.
mode indefinitely.
13.2. MAIN REFERENCE FAILURE WITH AN ALTERNATE REFERENCE SET
If an alternate reference was set in menu 03, the DCD-8 goes into the following cycle:
During Step 1, the Lock status on the LCD display indicates "HOLDING".
In the event of failure of the Alternate Reference, the DCD-8 goes back through steps 1 and
2, but this time, Internal Crystal is used as the new reference.
- the generator goes in HOLDING mode, holding the last known frequency.
LOCKED --" to "LOCKED" as it reaches full lock.
Page 17
-
Advertisement
Table of Contents
