[App_rpt-users] AllStar Node / repeater radios

Skyler F electricity440 at gmail.com
Thu Sep 24 14:48:46 EDT 2015


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> 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> 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]
>> *Sent:* Thursday, September 24, 2015 1:29 PM
>> *To:* Ken <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> 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
>> <electricity440 at gmail.com>]
>> *Sent:* Thursday, September 24, 2015 10:17 AM
>> *To:* 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>
>> 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>
>> 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> 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
>>
>> KDØWHB
>>
>> electricity440 at gmail.com
>>
>>
>>
>>
>>
>>
>>
>> --
>>
>> Skyler Fennell
>>
>> amsatnet.info
>>
>> KDØWHB
>>
>> electricity440 at gmail.com
>>
>>
>
>
> --
> Skyler Fennell
> amsatnet.info
> KDØWHB
> electricity440 at gmail.com
>



-- 
Skyler Fennell
amsatnet.info
KDØWHB
electricity440 at gmail.com
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