Tektronix WVR8200 User Manual page 117

Display information
Above-bar warning This instrument displays warning messages above the level meter bars. The
warning messages that can appear above the bars as follows:
messages
Clip. The number of consecutive samples equals or exceeds the # Samples for
Clip setting.
Over. The signal is at or above the specified Over Level for a time exceeding
the Duration for Over setting.
In-bar warning messages
This instrument displays warning messages within the level meter bars. The
warning messages that can appear are shown below in order of priority.
UNLOCKED. The instrument is not locked to an incoming signal on the indicated
input channel. Data cannot be decoded and all data and other errors are ignored.
This means that if an AES input is selected, nothing recognizable is present on the
input, or if embedded audio is selected, the VIDEO input is unrecognizable.
AES PARITY. The incoming subframe does not have even parity as specified
by the digital audio standards. The data sample is unreliable and is ignored. The
level meters and Lissajous display treat the sample as a zero sample.
AES CRC ERROR. The CRC code in the AES channel status packet is incorrect.
Sometimes the CRC code is set to zero, indicating that the signal is missing; when
this is the case, this message is not displayed.
MUTE. The number of consecutive all-zero samples equals or exceeds the #
Samples for Mute setting.
SILENCE. The signal is at or below the specified Silence Level for a time
exceeding the Duration for Silence setting.
DISABLED. Indicates that an audio bar is not active. This message is mainly
seen with a Dolby Digital source when a listening mode is selected with a reduced
number of channels.
AES V BIT. 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 level meter bars and Lissajous
display treat the affected samples as zero samples.
NO AUDIO. Indicates that an AES or embedded input has the Non audio bit set.
NOT PRESENT. Indicates that an audio bar is not present in the current audio
input. This can be present if a Dolby Digital input has a coding mode indicating a
reduced number of channels.
DOLBY D. Indicates an AES or embedded input is Dolby Digital.
DOLBY D+. Indicates an AES or embedded input is DOLBY Digital Plus.
DOLBY E. Indicates an AES or embedded input is DOLBY E.
WVR8200 and WVR8300 User Manual 97