Lambda SR1, Operation Manual, Page: 89 / 317

SR1 Operation 89
© 2014 Stanford Research Systems
mirrored on the professional receive panel by 4 indicators which glow red if the corresponding flag is set
and green if it is not.
The professional standard defines byte 23 as a cyclic redundancy check (CRC) character. SR1 allows
several options for the transmission of the CRC byte.
CRC controls the transmission of byte 23.
Static The same byte is transmitted with every digital audio block. The value of the byte is
whatever was being transmitted when the CRC mode was set to satatic.
Correct The correct CRC byte is sent with each digital audio block.
Incorrect A changing, incorrect CRC byte is sent with each digital audio block.
Zero The CRC byte is set to zero.
Received Status Bits
The grouping of the received status display for both professional and consumer modes is shown above.
The topmost display shows the current mode alongside an indicator which glows red if the validity flag for
that channel is set. In professional mode, CRC errors are not shown on the status panel but instead on
the
Digital Audio Status Panel at the bottom of the Digital I/O panel. Received status bits can be
highlighted to call out differences between transmit and receive status or to indicate differences in
received status between the two channels. Highlighting is controlled from the
Digital I/O panel.
Differences are highlighted in yellow.