Tektronix 070-8811-08 - Manual (Page 103)

Appendix B: Error/Warning Messages
88 764 Digital Audio Monitor User Manual
To determine the exact cause of a SYNC ERR flag, select the 764
Session display and check the Sample Rate and Frame Sync Err
fields in the SESSION STATISTICS panel. See The Session Display
on page 29 for more information. The flag will persist until
synchronization is achieved, or until “Suppress Sync Loss Flags” is
set in the Level Meters submenu.
V BIT
Location: In-bar.
Indicates that the Validity bit is set high for one or more data
samples. In the AES/EBU standard, a set validity bit indicates that
the sample is not suitable for conversion to audio. By default, The
meter bars and phase display treat the affected samples as a zero
samples. When Session is running, the instrument counts “invalid
samples” and displays the current total on the Session display.
You can suppress the V BIT message by setting the “Ignore Validity
Bit” item in the Level Meters submenu to YES. If you do so, the
764 will treat all samples as valid, and the word “off” will appear in
the Invalid samples fields of the Session display. (This feature is
included because the use of the Validity bit varies despite its official
meaning as specified in the AES/EBU standard, and you may find it
desirable to monitor audio from “invalid” samples.)