CDM1250 questions

[dasuriano]

I am trying to program a CDM1250 for a base radio. It will be programmed with pager tones to alert an on duty crew, but I am having some issues with getting it set up the way I would like. I want the alert tones set for a fixed volume, so that even if the radio gets turned down, the tones will be heard without question, so I have them set for a fixed volume, which works fine. Is there a way to adjust the alert tones separate from the button press tones or is there a way to completely disable the tones, except for the alert tones?
And right now, I have the tones programmed and they alert fine, but they continue to alert until the monitor button is pressed. How can I get them to alert once and then stop? I'm fearing that they will beep during the voice dispatch and the crew will miss information, so I only want it to beep during the tones.
Thanks.

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[SteveC0625]

Signalling ---> Quik Call II System ---> Quic Call II System - 1 ---> Call Alert / Sel Call tab ---> Alert Tone Auto Reset box must be checked.

The alert tones will sound once and then reset. It won't silence the radio but it will silence the alert tones.

[evfd1625]

You need to go into Signaling>Quick Call II system> then pick your system, go to the Call Alert/Sel Call Tab
Click the Call Alert Type box, drop it down and select Call Alert w/Voice and then check the box for the Alert Tone auto reset. This will make the radio make it's alert tone, then stop after one cycle to hear the audio. As far as independent volume, I don't think that is possible.

[mmckenna]

To address the volume control, you will need to pull flat audio off the rear 20 pin connector and run it to a separate amp.

That should work, but unless you install the radio in a locked box and all the speakers and wiring are installed in such a way to keep people from fiddling with them, it isn't going to matter.

Been there, done that. Someone WILL find a way to screw with the audio levels. Each shift will decide that they know the exact level it should be set at, and each shift change will result in someone screwing with it.

If you can figure that part out, let me know.

[cmdrwill]

If you want speaker audio for other parts of the station, look for Filtered RX audio on the accy connector. Run that thru a blocking capacitor to the line input of the Public Address amplifier.

Now Joe fireman can not affect the station speakers' volume by tweeking the radio's volume control.

[mmckenna]

Originally Posted by cmdrwill

If you want speaker audio for other parts of the station, look for Filtered RX audio on the accy connector. Run that thru a blocking capacitor to the line input of the Public Address amplifier.

Now Joe fireman can not affect the station speakers' volume by tweeking the radio's volume control.

True, but the issue we had was them messing with the amplifier that was up in the attic.

[cmdrwill]

Originally Posted by mmckenna

True, but the issue we had was them messing with the amplifier that was up in the attic.

There are rack mount panels that enclose the amplifiers knobs behind a screen,
And you are not the only one with this problem......

LockTite the knobs!

[dasuriano]

Thanks for the help. The radio works fine now that I changed the call reset setting. I ended up switching the volume from the fixed alert tone to a +50% volume offset. It seems to work better that way and when we can easily hear it when we need.

[dasuriano]

Everything seems to be working okay, except for one more issue. We are scanning two channels in the radio, the fire dispatch channel and our dispatch/ops channel. When we are dispatched solely, everything works okay. But when we are dispatched simultaneously with fire, the radio hangs on the fire tone first and skips our first one. Basically, when we are scanning, we catch the fire tone and the end of our second tone. I dropped the scan delay down to its minimum, but it still does it. I changed the scan list around, moving our dispatch channel to the first one, then selected, then fire. Anyone have any insight? I'm drawing blanks, since I haven't programmed a Professional series radio in a long time.

[mmckenna]

Scanning is an issue when you are trying to catch paging tones. We don't use it since it's so unreliable. Instead we installed two separate CDM-1250s, one on the county channel to catch pages from them, one on our own channel to catch pages from our own dispatch. There is a third radio that can be used to listen in on other incidents, fire ground channels, etc.