[App_rpt-users] AllStar Node / repeater radios
Jon Rorke
jrorke at cogeco.ca
Thu Sep 24 20:11:15 UTC 2015
Looks like it might work.
Didnt see any audio specs but it hints it has discriminator and direct mod.
RQ
On 9/24/2015 2:48 PM, Skyler F wrote:
> Will this radio work for Dstar I have this chinese data radio:
>
> https://www.argentdata.com/catalog/product_info.php?products_id=107
>
> On Thu, Sep 24, 2015 at 12:48 PM, Skyler F <electricity440 at gmail.com
> <mailto:electricity440 at gmail.com>> wrote:
>
> Thanks,
>
> So what you are saying is that freestar only allows the DSTAR
> network if you are coming in from a digital modulation, if the
> switch is flipped to analog, it disables the network?
>
>
>
>
>
> On Thu, Sep 24, 2015 at 12:26 PM, Ken <ke2n at cs.com
> <mailto:ke2n at cs.com>> wrote:
>
> You can transmit GMSK containing the DSTAR encoding with a
> cheap sound card. The hard part is finding a radio that
> passes 1 Hz to about 6 kHz with a fairly flat passband.
>
> The freestar folks have a way to toggle operation between
> analog and digital, if you want (see VA3UV web pages).
>
> The “Network” activity is managed by separate linking programs
> that talk to the repeater software module. If you were in
> analog mode, the linking programs would not get any data and
> they would not do anything on the network that linked the
> DSTAR machine to a reflector or other repeater.
>
> So: yes.
>
> Regards
>
> Ken
>
> *From:*Skyler Fennell [mailto:electricity440 at gmail.com
> <mailto:electricity440 at gmail.com>]
> *Sent:* Thursday, September 24, 2015 1:29 PM
> *To:* Ken <ke2n at cs.com <mailto:ke2n at cs.com>>
>
>
> *Subject:* Re: [App_rpt-users] AllStar Node / repeater radios
>
> I should probably move this to a DSTAR/free star group but
> here is my last question:
>
> If I want a radio to transmit digital, I can use software with
> a cheap sound card. Correct?
>
> Is there any way to use a sound card to transmit analog audio
> while still connected to the DSTAR network?
>
>
> On Sep 24, 2015, at 8:28 AM, Ken <ke2n at cs.com
> <mailto:ke2n at cs.com>> wrote:
>
> This should be on the freestar reflector I think (re:
> “dstarrepeaterd” program – the “sound card” DSTAR modem)
>
> I found that the low-pass filtering in the URI limits the
> frequency response so that it does not reproduce the
> baseband signal with enough fidelity to work on DSTAR
> GMSK. The result is a lot of errors on the DSTAR side.
> As posted many times on the other reflector, the absolute
> cheapest sound fob with no filtering seems to work best
> (but make sure your transmitter has at least some filtering).
>
> Having said that, as an experiment, I changed the relevant
> surface-mount capacitors in one channel, of one of my
> URIs, and it worked fine on DSTAR.
>
> Regards
>
> Ken
>
> KE2N
>
> *From:*Skyler F [mailto:electricity440 at gmail.com]
> *Sent:* Thursday, September 24, 2015 10:17 AM
> *To:* app_rpt-users at ohnosec.org
> <mailto:app_rpt-users at ohnosec.org>
> *Subject:* Re: [App_rpt-users] AllStar Node / repeater radios
>
> Is it possible to use a URIx for freestar yet or do you
> still need a hardware board for the digital stuff? I know
> they were working on something for software.
>
> On Thu, Sep 24, 2015 at 8:15 AM, Steve Zingman
> <szingman at msgstor.com <mailto:szingman at msgstor.com>> wrote:
>
> Digital needs unfiltered receiver and transmitter
> audio. I've done it with D-STAR and DMR. I have only
> setup a SM-50 as a user radio.
>
> Steve
>
> On 9/24/2015 10:05 AM, Skyler F wrote:
>
> Well my personal experience with a baofeng node is
> really good audio reports, and sometimes better
> than my motorola SM-50 discriminator audio. I just
> use the internal tone decoder in those baofeng
> radios for COR.
>
> Would they not be suitable for DSTAR though?
>
> On Thu, Sep 24, 2015 at 7:41 AM, Steve Zingman
> <szingman at msgstor.com
> <mailto:szingman at msgstor.com>> wrote:
>
>
>
> On 9/24/2015 9:30 AM, Skyler Fennell wrote:
>
> Can I have an explanation of why
> discriminator is needed for anything but
> actual digital modulation like 9600 baud?
>
> To prevent PL tones?
> Nope, when plugging in good headsets I can
> hear the CTCSS tone from the repeater and
> even on the baofeng.
>
> Lack of high frequency noise?
> Put a high pass filter
>
> Someone please explain why discrim is
> needed. Good audio is good audio and can't
> it be manipulated to fit the needs of the
> application?
>
> Maybe I don't want other filters inline, I
> want total control of the receive audio.
> de-emphases CTCSS filtering etc.
>
> If worried about audio levels, put an AlC
> which automatically feeds the system
> (weather Allstar or free star) with the
> perfect level independent of the level of
> the user.
>
> Please note I'm only talking analog.
>
> 73
> Skyler KD0WHB
>
> On Sep 24, 2015, at 7:15 AM, Steve
> Zingman <szingman at msgstor.com
> <mailto:szingman at msgstor.com>> wrote:
>
> Being a DSP based radio, the BF888 is
> a cheap low power analog only RF
> package. Given the lack of
> discriminator and modulator access it
> is limited.
>
> For a receiver the Maxtrac / Radius /
> GM300 work well. For a transmitter not
> so much. Heat output and with the
> Maxtrac, problems with power and
> deviation control out of band can
> cause problems without custom firmware
> or hardware hacks.
>
> My absolute favorite RF gear for
> Analog / Digital repeaters is Tait.
> The T800 series is a purpose built
> programmable Exciter / Receiver
> package. With access to all the
> signals anyone would want. I started
> using them for 927 MHz repeaters and
> have had great performance on UHF and
> VHF. Mix and match at will. Pair a VHF
> receiver with a UHF or 900 MHz
> transmitter for a nice RF linked
> receiver site. For link radios simplex
> nodes and "Hot Spots" I've come to
> favor the Tait T2000 mobiles. They are
> easy to program, well documented, lots
> of IO and run cool in transmit.
>
> The above is not to say there are not
> a LOT of great repeater / node
> packages out there. The GE MASTR II
> comes to mind. I have to mention the
> Micor to keep the flack down. ;) I've
> built repeaters using everything from
> a Motorola 30D to current equipment.
>
> Your mileage may vary.
>
> 73, Steve N4IRS
>
> --
> ,,,
> (o o)
> -----ooO-(_)-Ooo------
> --- N4IRS was Here ---
>
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>
> --
>
> Skyler Fennell
>
> amsatnet.info <http://amsatnet.info>
>
> KDØWHB
>
> electricity440 at gmail.com
> <mailto:electricity440 at gmail.com>
>
>
>
> --
>
> Skyler Fennell
>
> amsatnet.info <http://amsatnet.info>
>
> KDØWHB
>
> electricity440 at gmail.com <mailto:electricity440 at gmail.com>
>
>
>
>
> --
> Skyler Fennell
> amsatnet.info <http://amsatnet.info>
> KDØWHB
> electricity440 at gmail.com <mailto:electricity440 at gmail.com>
>
>
>
>
> --
> Skyler Fennell
> amsatnet.info <http://amsatnet.info>
> KDØWHB
> electricity440 at gmail.com <mailto:electricity440 at gmail.com>
>
>
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