Tektronix WFM5200 User Manual page 94

Display Information
Above-Bar Warning
Messages
In-Bar Warning Messages
78
This instrument displays warning messages above the level meter bars. The
warning messages that can appear above the bars as follows:
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.
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 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 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 embedded input is DOLBY Digital Plus.
DOLBY E. Indicates an embedded input is DOLBY E.
WFM5200 Waveform Monitor User Manual