Would I be correct in hoping that your TCAS however would still produce an RA and that it does not rely on any input from your own transponder? (Answer's in the affirmative greatly appreciated, as it would surely be a gross oversight else)
Sadly you'd be wrong. The transponders and the TCAS transmitter/receiver are intimately connected. If both transponders are U/S (or at standby) the TCAS will not be working.
pb
(p.s. perhaps a mod might relocate this to a more appropriate forum)