User manual

Digital Interface Tester
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AM700 Audio Measurement Set User Manual
Figure 4-56: Digital Interface Tester Input Configuration menu
No Signal. When there is no digital signal applied, or the applied signal deteriorates
to the point that the AM700 can no longer lock on, there some indicators that supply
visual feedback as to what is occurring. In the absence of a signal, “No input” is
displayed immediately below the measurement name in the view window or, in the
case of the Bit Activity display, across the graticule display. If the signal is below
the detection thresholds (such as too much jitter or amplitude too low), but is still
detectable, the error message displayed is “Input unlocked.” In either case, the trace
or tabular data is no longer displayed.