[ICOM] IC 229H deviation adjustment?

[Paul Erickson]

Has anyone had any experience adjusting the deviation on the IC 229H?

I have a copy of the service manual, and know that R12 on the main board 
is the
adjustment point, but I don't have a service monitor, and was wondering 
if there
was some other way to assess the amount of adjustment needed? I am trying to
use the rig for packet, and I suspect that the deviation is too wide to 
allow me
to contact a local packet cluster, which I can hear fine, but cannot seem to
connect to.

Any thoughts would be greatly appreciated.

cheers, Paul - VA7NT