24 Jan
2018
24 Jan
'18
1:40 a.m.
Hi Tim, >f you are using discriminator audio you don't have to set deemp=yes in > voter.conf because 13 - COR type = 0 (normal) will switch in the RTCM's > filter. With 13 - COR type = 1 >>(Ignore) the filter is not switched in. > > >You can use COR type 0 in non-voting applications if you want to use the > RTCM's squelch circuit which is quite good and MICOR quality. This has 2 > advantages. You'll be able to >see the RTCM's RSSI rather than just 0 and > 255. Second, you can use turn the P/L on and off as the only output PIN > isn't 'anded' COR and PL. In this case you likely will need to >set > deemp=yes in voter.conf. > I didn't know either of those things! Very good to know. > > Transmit audio is not pre-emphasize unless you have CTCSS enabled. If you > need pre-emphasis but no tone you can set a freq with 0 level. > Yep! That's what I was eluding to in examples 1 and 4 of my original post. Thanks for the 411, it's much appreciated as always. > > > On Tue, Jan 23, 2018 at 12:04 PM, Sam Skolfield <kj6qfs@gmail.com> wrote: > >> Hi Jessie. >> Yes, for voting and/or simulcasting, you obviously need to provide raw >> discriminator audio and modulator audio. >> >> This is will be a non-voted repeater. >> >> On Tue, Jan 23, 2018 at 7:41 AM Jesse Lloyd <ve7lyd@gmail.com> wrote: >> >>> Well, if you want it to vote it'll have to be discriminator rx audio. If >>> not, I'll use which ever squelch I deem to be superior. The motorola 2 >>> level squelches are typically pretty good, but you have to open the lid on >>> a GM300 to adjust it. If that's ok, then I'd use that. >>> >>> For pre-emph, if you want simulcast with PL you have to let the voter >>> make the PL tone. Otherwise I prefer using the mic in as it has nice a nice >>> audio filter response and limiter circuit. Just a note for the GM300 you >>> should adjust the max deviation when programming them into the ham band. >>> The UHF ones I find change quite a bit with frequency. Sometimes you'll >>> also have to make an adjustment to the PLL reference voltage to get it to >>> lock up for Tx. >>> >>> Cheers, >>> Jesse >>> >>> > On Jan 23, 2018, at 3:32 AM, Sam Skolfield <kj6qfs@gmail.com> wrote: >>> > >>> > Greetings, >>> > I've been playing with RTCMs and VOTER boards for almost 5 years now, >>> and I'm very happy with what I have in service. I've built a multi-site >>> voted system, and more recently a non-voted hub that ties together repeater >>> controllers at a few sites. >>> > >>> > I'm helping a friend but together a RTCM / pair of GM300 repeater, and >>> got to thinking about audio options. There is more than one right way! >>> > >>> > 1. Discriminator audio to RTCM, set deemp=yes in voter.conf (causes >>> hardware de-emphasis in RTCM circuitry) >>> > RTCM TX audio to GM300 Flat audio input, use chan_voter software >>> preemphasis by specifying txctcss and txctcsslevel=0 in rpt.conf >>> > >>> > 2. 1. Discriminator audio to RTCM, set deemp=yes in voter.conf (causes >>> hardware de-emphasis in RTCM circuitry) >>> > RTCM TX audio to mic audio, letting radio do pre-emphasis. >>> > >>> > >>> > 3. 1.De-emphased audio from GM300 (JU551 set to B) RTCM >>> > RTCM TX audio to mic audio, letting radio do pre-emphasis. >>> > >>> > 4. 1.De-emphased audio from GM300 (JU551 set to B) RTCM >>> > RTCM TX audio to Flat audio input, use chan_voter software preemphasis >>> by specifying txctcss and txctcsslevel=0 in rpt.conf >>> > >>> > >>> > All four of these combinations should theoretically produce "flat" >>> system response, but I'm sure all four yield slightly different results, >>> given different corner frequencies in hardware/software de-emphasis / >>> pre-emphasis and different input/output impedance combinations. >>> > >>> > Has anyone experimented with these combinations? >>> > >>> > 73 >>> > -- >>> > KJ6QFS >>> > Sam Skolfield >>> > _______________________________________________ >>> > App_rpt-users mailing list >>> > App_rpt-users@lists.allstarlink.org >>> > http://lists.allstarlink.org/cgi-bin/mailman/listinfo/app_rpt-users >>> > >>> > To unsubscribe from this list please visit >>> http://lists.allstarlink.org/cgi-bin/mailman/listinfo/app_rpt-users and >>> scroll down to the bottom of the page. Enter your email address and press >>> the "Unsubscribe or edit options button" >>> > You do not need a password to unsubscribe, you can do it via email >>> confirmation. If you have trouble unsubscribing, please send a message to >>> the list detailing the problem. >>> _______________________________________________ >>> App_rpt-users mailing list >>> App_rpt-users@lists.allstarlink.org >>> http://lists.allstarlink.org/cgi-bin/mailman/listinfo/app_rpt-users >>> >>> To unsubscribe from this list please visit http://lists.allstarlink.org/ >>> cgi-bin/mailman/listinfo/app_rpt-users and scroll down to the bottom of >>> the page. Enter your email address and press the "Unsubscribe or edit >>> options button" >>> You do not need a password to unsubscribe, you can do it via email >>> confirmation. If you have trouble unsubscribing, please send a message to >>> the list detailing the problem. >> >> -- >> KJ6QFS >> Sam Skolfield >> >> _______________________________________________ >> App_rpt-users mailing list >> App_rpt-users@lists.allstarlink.org >> http://lists.allstarlink.org/cgi-bin/mailman/listinfo/app_rpt-users >> >> To unsubscribe from this list please visit http://lists.allstarlink.org/ >> cgi-bin/mailman/listinfo/app_rpt-users and scroll down to the bottom of >> the page. Enter your email address and press the "Unsubscribe or edit >> options button" >> You do not need a password to unsubscribe, you can do it via email >> confirmation. If you have trouble unsubscribing, please send a message to >> the list detailing the problem. >> > > > > -- > Tim WD6AWP > _______________________________________________ > App_rpt-users mailing list > App_rpt-users@lists.allstarlink.org > http://lists.allstarlink.org/cgi-bin/mailman/listinfo/app_rpt-users > > To unsubscribe from this list please visit http://lists.allstarlink.org/ > cgi-bin/mailman/listinfo/app_rpt-users and scroll down to the bottom of > the page. Enter your email address and press the "Unsubscribe or edit > options button" > You do not need a password to unsubscribe, you can do it via email > confirmation. If you have trouble unsubscribing, please send a message to > the list detailing the problem.