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11.4 OFF SPEED INDICATION WITH A SET REFERENCE
When the reference is detected to be off speed by more than 1.5%, the DCD-8 alerts the
user as follows. The main display alternates between the normal LOCKED status and the
OFF SPEED indication, staying about 2 seconds on each one. The measured reference
shown under the reference.
Here is an example of the Off Speed indication for Ref A WC1.
For comparison, here is another example for Ref A Video, off speed:
11.5 HOW DOES IT ALL WORK?
To help To help understand how these different modes interact, let's take a look at a few examples.
Note: 48.003 is only used in these examples to illustrate that the DCD-8, when locked to
the reference, will track small variations. 44.100 is used to illustrate when a completely dif-
ferent rate is supplied or intended.s.
48.003k in = 48.003k out
44.1k in = 44.1k out
48.003k in = 48.003k out
44.1k in = 48k out
48.003k in = 48.003K out
48.003k in = 44.103k out
12. VSO
VSO is selected in the Reference menus (02 for domain A and 22 for domain B). In the main
display, when domain A is in VSO mode and domain B is following A:
NOTE: With VSO activated, the displayed frequencies on the right side of the LCD are not
the resultant frequencies but rather the base frequency, prior to VSO being applied.
The DCD-8 LEARNS the incoming rate and the
output rate matches the input. In this case, no rate
needs to be programmed.
SET assigns the nominal output rate.
With AUTO, the output rate mirrors the reference.
The DCD-8 SETS the expected input rate and the
expected output rate. An inputt rate different than
what was SET provides a proportionate speed change
DCD-8 User Manual
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