[Icom] r7000 ci-v troubleshooting

[John Blue]

Jerry from Deltacomm suggested the following:

>Connect the scope to the Black Data (+) lead, while the interface is
>connected to the receiver.  Turn everything ON. Monitor this lead while
>turning the frequency dial.  If the receiver CI-V port is working you
>should observe pulses going between ground and +5vdc.  You should also
>see these pulses while selecting different modes of operation.  This
>test doesn't guarantee the receiver port is OK but will give you a
>indication it looks OK.

Can anyone build upon this with ci-v tips?

John