16. Status Display
334
• TRS Code
Input signal TRS (Timing Reference Signal) protection bit errors are displayed.
An error is counted when the correspondence between F, V, and H in the protection bits
(XYZ) of EAV (End of Active Video) and SAV (Start of Active Video) and error correction
flags P3, P2, P1, and P0 is outside the video specifications.
• ILLEGAL Code
An error is counted when the input signal data is outside the timing reference signal (TRS)
range or the range specified for the ancillary data flag (ADF) and “000h to 003h” or “3FCh
to 3FFh” is detected.
In SDI signals, 000h to 003h and 3FCh to 3FFh (expressed as 10 bit data) are designed to
be used as timing reference signals and ancillary data flags, they cannot be used as video
signal data or ancillary data. An error is counted when data other than timing reference
signal or ancillary data flag is present in this area.
• Line Number (other than SD)
An error is counted when the line number that is embedded in the input signal does not
match the line number that has been counted by the instrument.
• Check Sum
The instrument uses the checksum in the input signal's ancillary data header to count
errors.
• Parity
The instrument uses the parity bit in the input signal's ancillary data header to count
errors.
• BCH (other than SD)
The instrument counts the errors in the BCH code in the input signal's embedded audio.
• Parity (other than SD)
The instrument counts the parity errors in the input signal's embedded audio.
• DBN
The instrument counts the continuity errors in the input signal's embedded audio.
Embedded audio packets contain data block number words (DBN), which indicate packet
continuity. A serial number between 1 and 255 is assigned to each packet. An error is
counted when this DBN is not continuous between packets.
If DBN does not repeat the values from 1 and 255 and is fixed to 0, it is not detected as
an error.
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