Tektronix 070-8811-08 - Manual (Page 47)

Operating Basics
32 764 Digital Audio Monitor User Manual
SYNC ERR flags as shown in Figure 24. Please see the following
paragraphs for more information.
Figure 24: The SYNC ERR Flags
H Frame Synchronization Error — for each input with respect to the
Digital Audio Reference (DAR), when one is present at the
REFERENCE input. Otherwise — when both inputs are active but
no DAR is present — the error of input 3–4 relative to input 1–2,
as depicted in Figure 25. Errors are expressed as the percentage
of a complete digital audio frame.
Notice the “No Reference Signal” message in Figure 25. It will
appear whenever a DAR is absent from the REFERENCE input.
Figure 25: Sync Error Reporting in the Absence of a DAR
The AES11 standard specifies that synchronization errors should
be no greater than 25% of the audio sample frame. When the
synchronization error exceeds this limit, a SYNC ERR flag