How to get the ECM info and CAIDs for channels with dvbsnoop in Merlin3+gp3.2?

Hello

How to get the ECM info and CAIDs for channels with dvbsnoop ?

Some are suggested that I should run the following command in telnet. But when I run it nothing happens:

dvbsnoop -n 1 -nph 1 | grep CA_system_ID | awk -F "(" '{print $2}' | awk -F ")" '{print $1}'

Some have suggested the following command:

dvbsnoop -n 1 -nph 1

When I run it, a series of information be appears but ECM info and CAIDs did not appear.

Regards

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I mean when the ECM info of a channel with CW (BISS) coding system is changed, how to gain the new ECM ?
The first command works only for pay TV, NOT FOR a channel with CW (BISS) coding system.