Data packet size of the isochronous channel. 
- Enumerator: 
- 
| UCS_ISOC_PCKT_SIZE_188 | Standard MPEG2 Transport Stream packet size, no encryption.  |  | UCS_ISOC_PCKT_SIZE_196 | DTCP Supplement B, DTCP over MOST.  |  | UCS_ISOC_PCKT_SIZE_206 | DTCP Supplement E, DTCP over IP.  |