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WFM700 Series Waveform Monitors User Manual
Ancillary Data Display
The Ancillary Data display (see Figure 3--1) shows the raw (undecoded) data
words in the selected ancillary data packets. The ancillary data is shown only in
hexadecimal format. Since the display is updated at approximately 2-second
intervals, rapid data changes cannot be detected.
Use the DID and SDID/DBN soft keys in conjunction with the general purpose
knob to select the DID and/or SDID values for the type of ancillary data packet
to be monitored. DID and SDID values have the following characteristics:
H DID and SDID values range between 0x01 and 0xff.
H For DID values in the range 0x00 -- 0x7F (Type 2 packets), the SDID values
are used.
H For DID values in the range 0x80 -- 0xFF (Type 1 packets), there are no
SDID values used (the SDID soft key is greyed out).
Table 3--1 lists the DID and SDID values that are defined for common types of
ancillary data.
Figure 3- 1: Ancillary Data display