Doug wrote: > I want to be able to toggle the decode function on and off. > In other words select ctcss control or cor control. The encode > will be on all the time. It will be optional for users to > have ctcss on or off. It would be an advantage in down town areas. > Otherwise, your squelch is opening on your mobile caused by all > the cash registers etc.. I set up the UHF machine this way and > it works slick..
Okay, got it. I thought maybe you were looking to switch encode on and off, for an on-channel link or similar. For doing COS and CTCSS modes... that's "easy"! Both signals you need for your S-Com controller are already available on the backplane of the MASTR II station, in the TS-64 mod configuration. I wouldn't mess with the purple wire. Go to the S-Com site and download the PDF document there that shows how to hook a 7K to a MASTR II Station: http://www.scomcontrollers.com/downloads/7kgem2bs.pdf You'll see that by cutting the jumper between H41 and H42 on the receiver system board, RUS and CTCSS decode are separated into two separate signals, and you then have "COS" and "CTCSS" separated for your controller. Then just hook up as indicated and program the controller to have different modes. COS and CTCSS decode will operate independently, which you can confirm on the front-panel LED's of your 7K, or whatever you have for a controller. (If you're using something other than a 7K, but I won't "vouch" for that document being the correct things for a controller other than a 7K... since RUS can't source much current. I know it works with both the TS-64 mod and a 7K, because that's what we run, and we use both of these documents as a "base" configuration. The document also details connections to a 5K, and we've used that documented configuration for our machines with 5Ks, too. Factory tone encode/decode boards, or the mod, doesn't matter.) This is why the local folks here created this TS-64 mod... so the station could be wired in this "standard" configuration to our S-Com controllers and behave identically to stations with factory tone encode/decode boards installed separately. The only thing this mod causes that is non-standard, is removal of the TS-64MSTII from the plug-in location will cause the station to be unable to transmit because PTT is flowing through the TS-64 after the re-routing done on the system board. We label our TS-64MSTII's carefully with this warning, in case someone with MASTR II experience is working on the thing and can't figure out why it won't key with the tone board removed, or a dead/fried tone board. (Never seen the latter problem, but it'll happen sooner or later.) Once you have it connected up that way, and the controller programmed, some other notes: Personally, with the MASTR II I like "AND" Squelch for the end-user "with tone" setup. It closes cleaner. We don't usually run with our receiver tone off very often, but that's just a simple switch via a macro to "COS" only, when we want to do that. Make sure your squelch is set properly before leaving the site, though -- or you'll command it to COS and it'll just sit there and blast white noise at you! (GRIN) And finally, there is a mod in the GE LBI's where a capacitor can be changed to speed/slow the squelch action a bit on weak signals. I'm not convinced the MASTR II squelch is as good as the now infamous "Micor bi-level squelch", but it's worth looking into if your station was a true station and not a "repeater" configuration when you first got it. I forget what LBI it's in, but it's there... somewhere. Setting them up in "AND" mode in the controller, really makes them sound just fine, though... if the squelch is adjusted correctly. If you happen to have a DADM in your 7K, all the better... that makes it all sound "perfect", of course. As a side-comment, you can see from the S-Com doc, that the S-Com guys like 700 Hz for the CTCSS encoder. I find that just a touch too "hot" for my taste. I still like 650 Hz! I told you that one was a religious debate! (BIGGER GRIN) :-) Have fun! Nate WY0X
