Thanks Mike for the reply. I guess I am now curious as to why the mic buttons don't work. To the uninformed, it seems that this is just another function like any other on the radio.
Also, can the muted transmit audio be unmuted? Again, I understand the small latency problem, but in order to adjust the audio parameters from the control site, delayed audio is much, much better than no audio. Of course this is only for adjustment and testing purposes as the monitor function can easily be turned off from the control head of the 480.
Thank you for your help,
73, Rick N6CR