Ensemble Designs 4500 ASI and SMPTE 310M Converter and MPEG Transport Processor - Manual (Page 19)

www.ensembledesigns.com 4500-19
Model 4500 MPEG Stream Processor
CRC Menu
The CRC menu shown below allows you to monitor the status of the Cyclic Redundancy Check (CRC)
data in the stream. A CRC and Data Checksum packet can be inserted into the stream by the 4500 to
provide data path integrity testing at downstream points. These CRC packets test the data integrity on
a transmission link by transmission link basis.
Input CRC • – Possible values are: None, Good, CRC Bad, CSum Bad, CRC/CSum Bad.
CRC ErrSec • – The CRC error rate per second.
CSum ErrSec • – The Checksum error rate per second.
Hop Count • – The number of times that the signal has gone from one 4500 to another.
For example, a 4500 module upstream may insert CRC packets which are detected by a
downstream 4500 module.
UpStream CRC • – Indicates whether there has been an error in the signal upstream.