Tektronix WFM2200A, User Manual

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ARIB Status displays
Use the ARIB Status displays to check for the presence and status of ARIB-based
information encoding. The instrument supports TR-B.22, TR-B.23-1, TR-B.23-2,
B.35, B.37, and B.39 ARIB standards.
To view the ARIB content displays, you must first enable them using the
CONFIG > Aux Data Settings > ARIB Content Display setting.
For detailed information about ARIB displays, see ARIB content displays on
page 207.
Audio Control Packet
display
The Audio Control Packet display allows you to view information on audio frame
number, sampling frequency, active channels, and relative audio-to-video delay
of each channel, as encoded in the audio control packet metadata.
Figure 35: Format of the Audio Control Packet
For SD signals, transmission of audio control packets is optional for 48 kHz
synchronous operation and required for all other modes of operation (since it
contains the information as to what mode is being used). Where frequent
switching is planned, receiving equipment can be designed to add or drop a
sample following a switch in the four out of five cases where the sequence is
broken.
The challenge in such a system is to detect that a switch has occurred. This can
be facilitated by use of the data block number in the ancillary data format
structure and by including an optional frame counter with the unused bits in the
audio frame number word of the audio control packet.
Display modes
112 WFM2300 and WFM2200A Waveform Monitors User Manual