To lock the AT transmitters, hit the set key, scroll down to "NO LOCK", hit set again and it will flash, scroll down to either "
MUTE LOCK" or "ALL LOCK", hold set till it says stored, scroll down to QUIT, and hit set again.
Mute lock will disable the
mute function of the
power switch, all lock will disable the
power switch entirely.
Anyway, for rental mics we've had great luck with the 3000 series. People poo-poo
Audio Technica for being cheap, but they're not junk nor all that cheap in my opinion. At least when compared to the real "entry
level wireless" with sub $300
MSRP's that have a working range of 20'
line of sight.
We've had 3000 series wireless units in our rental
stock for about four years now and they've held up remarkably well, only receintly did we have to
send some of the original-purchase receivers back to
Audio Technica for repair because a bad antenna
distro boink'ed their
power supplies. They're not perfect, and I do have my complaints about them, but in their price class I don't think they can be beaten even by more expensive systems like the SLX.
Now for our production stuff we're all 5000 series and ULX-P, with a little
bit of
UHF (the orignal) and a few Lectrosonics MM400 transmitters with a
venue system reciever. But when job requires we won't hesitate to pull 3000 series stuff out of rental and toss it to a fumbling CEO that will
drop their transmitter seven times durring the course of a production because he can't just leave it alone and in his pocket...
I don't have a lot of experience with the AT 200 and 2000 series though, I don't use them and I don't sell them so they could be complete crap.