[App_rpt] audio setup issues with USB FOBs
Hi there… We purchased a few of the DMK USB FOBs awhile back after homebrewing a few. When I was down in Virginia at company HQ last month, I spent a few nights trying to make this work to no avail. We have an old IFR service monitor which I was using to generate tones and such. We’re using an Icom commercial repeater IC-FR3000/4000. The Icom has no internal controls for rx or txaudio that I can find (documentation is very slim). Basically, rxtune doesn't want to work with the audio coming off the Icom repeater discriminator. I did not try deemphasized audio as I want to keep everything flat. In looking through some of the old posts we are seeing similar results whereby rxtune doesn’t see anything. But oddly enough, if I used the HT to generate DTMF tones, the * box would detect them. The transmitted audio I could not get more than 2 or 2.5 kHz deviation with the audio coming out of the * box. As a side note, when we were using the homebrew USB FOBs we had louder digitally generated audio (didn’t have the service monitor then) than repeated audio. Got any ideas to try? Thanks leon wa4zlw
Leon, Sounds like the flat output may be flat but only through 3 KHz and not up to 10 KHz where the noise is for carrier squelch. The way to figure this out is to sample the audio through the USB adapter into a utility like Audacity and use its FFT to see what the noise spectrum looks like. I'd be glad to help you do this by logging in, capturing the signal and transfering to my lab for analysis. I can take the results and come up with a configuration setting that will work for you. Just let me know what you want to do. 73, Steve Henke, W9SH On Thu, Apr 10, 2008 at 1:41 PM, Leon D. Zetekoff, NCE < wa4zlw@backwoodswireless.net> wrote:
Hi there…
We purchased a few of the DMK USB FOBs awhile back after homebrewing a few.
When I was down in Virginia at company HQ last month, I spent a few nights trying to make this work to no avail. We have an old IFR service monitor which I was using to generate tones and such. We're using an Icom commercial repeater IC-FR3000/4000. The Icom has no internal controls for rx or txaudio that I can find (documentation is very slim).
Basically, rxtune doesn't want to work with the audio coming off the Icom repeater discriminator. I did not try deemphasized audio as I want to keep everything flat. In looking through some of the old posts we are seeing similar results whereby rxtune doesn't see anything.
But oddly enough, if I used the HT to generate DTMF tones, the * box would detect them. The transmitted audio I could not get more than 2 or 2.5 kHz deviation with the audio coming out of the * box.
As a side note, when we were using the homebrew USB FOBs we had louder digitally generated audio (didn't have the service monitor then) than repeated audio.
Got any ideas to try?
Thanks leon wa4zlw
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I had what I thought was a good idea. I have an old S.A.M.E. Weather radio, that trips its squelch on any Fips Duck fart, it self squelches just after the closing FIPS code. So I wired the audio out to a usb dongle. the usbradio.conf is set for "Speaker". I got it tuned up and sounding pretty good. However in neither vox or USB carrier detect mode can detect the absense of audio. They both say the audio signal level is at 1000. even with NO audio coming from the receiver. I link into the node and it just keeps kerchunking itself in a vicious loop when there is no audio. With audio it plays fine. I created a private node (8888) and I can link in and get audio ok, but as soon as the wx radio audio is squelched the kerchunking starts. I tried monitor only and full duplex/simplex settings in both usbradio.conf and rpt.conf. I tried squelch settings from 0 to 999 with no luck. the squelch received level is always 1000. I want it to be semipermanently linked in and just dump the weather service to air whenever the receiver trips. This has to be some simple setting I'm just not finding it. Don W9DRR _________________________________________________________________ Going green? See the top 12 foods to eat organic. http://green.msn.com/galleries/photos/photos.aspx?gid=164&ocid=T003MSN51N1653A
Don, I think the mute level is hard coded. A little bit too much hiss from receiver audio amp and it will never/unreliably close. I'll make that a config file option and get back to you. 73, Steve H. W9SH On Wed, Apr 16, 2008 at 6:29 AM, Don Russell <w9drr@live.com> wrote:
I had what I thought was a good idea. I have an old S.A.M.E. Weather radio, that trips its squelch on any Fips Duck fart, it self squelches just after the closing FIPS code. So I wired the audio out to a usb dongle. the usbradio.conf is set for "Speaker". I got it tuned up and sounding pretty good.
However in neither vox or USB carrier detect mode can detect the absense of audio. They both say the audio signal level is at 1000. even with NO audio coming from the receiver. I link into the node and it just keeps kerchunking itself in a vicious loop when there is no audio. With audio it plays fine.
I created a private node (8888) and I can link in and get audio ok, but as soon as the wx radio audio is squelched the kerchunking starts. I tried monitor only and full duplex/simplex settings in both usbradio.conf and rpt.conf.
I tried squelch settings from 0 to 999 with no luck. the squelch received level is always 1000.
I want it to be semipermanently linked in and just dump the weather service to air whenever the receiver trips.
This has to be some simple setting I'm just not finding it.
Don W9DRR
------------------------------ Going green? See the top 12 foods to eat organic.<http://green.msn.com/galleries/photos/photos.aspx?gid=164&ocid=T003MSN51N1653A>
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For those of you that are on the friends-and-family autopatch plan, you might wanna change the IP address for seal (seal.lambdatel.com) in the iax.conf file from 24.249.200.118 to 67.215.233.178. I just moved the server this morning. Jim the tired Dude
participants (4)
-
Don Russell -
Jim Duuuude -
Leon D. Zetekoff, NCE -
Steven Henke