To those crews relying on TCAS be aware it is completely unreliable in azimuth!! It may give a return from an a/c you hear over the r/t but it will not display its position accurately.
Incidently HG if you deliberately mis-set an altitude/heading on me to check whether I was cross-checking you and I didn't...who would cross-check you to check you had correctly reset. You would be guilty of the failure you claim to be checking for.
