Date   
Re: Motorola Quantar & digital modes

Mike Moore
 

I saw a post in the repeater builder group about problems using the Quantar as a digital repeater.  I can't find the link now but will repeat the clipped test of the post.  I can't confirm this problem personally but there is help out there.  Sorry that I don't have the contact information from the post.  73, KC2NM

POST:
Hooking up MMDVM  (I used a ZUMradio Pi Hat v.0.9)to a Quantar was only partially successful.  I have a decent amount of experience with Quantars as well- I run a system which has 7 Quantars which are linked in P25 and analog running mixed mode.  I've also done board level repairs.

It boils down to this:  The Quantar works great in P25 using MMDVM (no big surprise there).  As for DMR, it will transmit DMR no problem, but the receive just WILL NOT WORK.  The furthest it could get was to see the downlink activation request from receive and would key up transmit, but it only intermittently recognizes sync (watching the MMDVM debug output).  I tried it only using P25 and DMR, nothing else.  To get it to this point, I ended up having to tap into the station control board at the most raw audio points I could find that low pass filters were not in the way.  The wireline and MRTI interfaces didn't work at all for me.  I would imagine the other non-TDMA protocols would probably work.

I was really perplexed as to why it would transmit DMR but not receive it.  After doing some analysis with my service monitor and O-scope, it looks like the issue is the phase delay of the RX audio varies wildly as you step up through the audio frequencies.  This is not the case with the transmit side which works nicely.  Keep in mind that all the audio in a Quantar (even analog) is digitized, so you never get to see what would be raw, analog discriminator audio.

As a comparison, I looked at the receive side of a CDM mobile radio which is known to work well with MMDVM DMR and found the phase delay was very consistent, unlike the Quantar receive.  At one point, I had the CDM mobile doing receive and the Quantar transmitting....what a frankenstein.

I had high hopes the Quantar would work with MMDVM because they are EXCELLENT repeaters, but this thing was developed over a couple decades ago and this TDMA wasn't considered in the design process.

I hope that clears this question up.

On Mon, Mar 12, 2018 at 12:37 PM, Steve Stroh <steve.stroh@...> wrote:
To finish John's thought, all digital voice radios that I've ever heard of (D-Star, DMR, P25, even System Fusion) are backwards compatible with FM. With the modification that John describes, you run the radio in FM mode. It's ideal if the radio is flexible about the channel size. For example, D-Star uses a 6.25 kHz channel rather than the (traditional to FM operation) 25 KHz channels, and the more common these days 12.5 kHz channel.

On Sun, Mar 11, 2018 at 3:06 PM, John D Hays - K7VE <john@...> wrote:
Jim,

You don't need an AMBE chip (eg. ThumbDV) at the repeater.  Most digital modes require a modem that is connected to the discriminator and modulator (flat audio, no pre/de-emphasis) and appropriate software to handle the protocol.  The UDRC II was designed to provide the hardware to support software defined modems and PTT  -- see https://nw-digital-radio.groups.io/g/udrc/wiki/UDRC%E2%84%A2-For-Simplex-Hotspots-and-Converted-Analog-Repeaters

On Sun, Mar 11, 2018 at 2:51 PM, jim lang <jimlang@...> wrote:

Does anyone have experience / knowledge of connecting say a Thumb DV or anything digital to a Quantar?  I have recently obtained a UHF Quantar, and was wondering if it is humanly possible to run it both analog (FM) and in digital modes…I know it’s already P25 capable, but thinking more along the lines of D-Star, Fusion, etc., etc.  (whatever the flavor of the month might be!).   Basically, whatever comes in (i.e., analog, Fusion, D-star) goes out.

 

Thanks in advance,

 

Jim / kd9gy




--


John D. Hays
Edmonds, WA
K7VE

   




--
Steve Stroh (personal / general): stevestroh@...


Re: Motorola Quantar & digital modes

Steve Stroh
 

To finish John's thought, all digital voice radios that I've ever heard of (D-Star, DMR, P25, even System Fusion) are backwards compatible with FM. With the modification that John describes, you run the radio in FM mode. It's ideal if the radio is flexible about the channel size. For example, D-Star uses a 6.25 kHz channel rather than the (traditional to FM operation) 25 KHz channels, and the more common these days 12.5 kHz channel.

On Sun, Mar 11, 2018 at 3:06 PM, John D Hays - K7VE <john@...> wrote:
Jim,

You don't need an AMBE chip (eg. ThumbDV) at the repeater.  Most digital modes require a modem that is connected to the discriminator and modulator (flat audio, no pre/de-emphasis) and appropriate software to handle the protocol.  The UDRC II was designed to provide the hardware to support software defined modems and PTT  -- see https://nw-digital-radio.groups.io/g/udrc/wiki/UDRC%E2%84%A2-For-Simplex-Hotspots-and-Converted-Analog-Repeaters

On Sun, Mar 11, 2018 at 2:51 PM, jim lang <jimlang@...> wrote:

Does anyone have experience / knowledge of connecting say a Thumb DV or anything digital to a Quantar?  I have recently obtained a UHF Quantar, and was wondering if it is humanly possible to run it both analog (FM) and in digital modes…I know it’s already P25 capable, but thinking more along the lines of D-Star, Fusion, etc., etc.  (whatever the flavor of the month might be!).   Basically, whatever comes in (i.e., analog, Fusion, D-star) goes out.

 

Thanks in advance,

 

Jim / kd9gy




--


John D. Hays
Edmonds, WA
K7VE

   




--
Steve Stroh (personal / general): stevestroh@...

Re: Motorola Quantar & digital modes

 

Jim,

You don't need an AMBE chip (eg. ThumbDV) at the repeater.  Most digital modes require a modem that is connected to the discriminator and modulator (flat audio, no pre/de-emphasis) and appropriate software to handle the protocol.  The UDRC II was designed to provide the hardware to support software defined modems and PTT  -- see https://nw-digital-radio.groups.io/g/udrc/wiki/UDRC%E2%84%A2-For-Simplex-Hotspots-and-Converted-Analog-Repeaters

On Sun, Mar 11, 2018 at 2:51 PM, jim lang <jimlang@...> wrote:

Does anyone have experience / knowledge of connecting say a Thumb DV or anything digital to a Quantar?  I have recently obtained a UHF Quantar, and was wondering if it is humanly possible to run it both analog (FM) and in digital modes…I know it’s already P25 capable, but thinking more along the lines of D-Star, Fusion, etc., etc.  (whatever the flavor of the month might be!).   Basically, whatever comes in (i.e., analog, Fusion, D-star) goes out.

 

Thanks in advance,

 

Jim / kd9gy




--


John D. Hays
Edmonds, WA
K7VE

   

Motorola Quantar & digital modes

jim lang <jimlang@...>
 

Does anyone have experience / knowledge of connecting say a Thumb DV or anything digital to a Quantar?  I have recently obtained a UHF Quantar, and was wondering if it is humanly possible to run it both analog (FM) and in digital modes…I know it’s already P25 capable, but thinking more along the lines of D-Star, Fusion, etc., etc.  (whatever the flavor of the month might be!).   Basically, whatever comes in (i.e., analog, Fusion, D-star) goes out.

 

Thanks in advance,

 

Jim / kd9gy

Re: Another funny project with the ThumbDV :-)

 

Hi John,

The addition of an AMBE3003 will be very very nice! Then you can select more reflectors you want to hear.
Website can be down sometimes because I am still developing and learning JavaScript. 

The software is not for public because it is still under heavy development. 

Greets,
   David PA7LIM 

Re: Another funny project with the ThumbDV :-)

 

David,

Nice -- working here.  With an XC-3006 someone could build this into a multi-stream page :)

John

--


John D. Hays
Edmonds, WA
K7VE

   

Re: Another funny project with the ThumbDV :-)

Jose Manuel Martinez Barbera
 

Great David, thanks for your great work in the experimentation, is it possible to download a copy of the Bluedv ambe WEB?



Enviado con Mailtrack

2018-03-11 19:47 GMT+00:00 David PA7LIM <info@...>:

Hi All,

You can listen to the REF030 C with your webbrowser. All DSTAR is voice transcoded by my ThumbDV.
Will let it run for a few days until I need my ThumbDV again.

http://dashboard.pa7lim.nl:3000/


Another funny project with the ThumbDV :-)

 

Hi All,

You can listen to the REF030 C with your webbrowser. All DSTAR is voice transcoded by my ThumbDV.
Will let it run for a few days until I need my ThumbDV again.

http://dashboard.pa7lim.nl:3000/

Re: Help NW Digital Radio with your view on GPS for new product

Steve KB9MWR <kb9mwr@...>
 

Can't say I am interested in that. I would be interested in say a 5 watt radio capable of SSB for 70cm. Something like the friendcom units, except capable of SSB. I could of swore David Rowe had plans for something like that, but really haven't been paying attention.

The way I see it, one can only do so much with a Raspberry Pi and sound card without more capable radios.

Help NW Digital Radio with your view on GPS for new product

 


NW Digital Radio is seeking input for the next Raspberry Pi based Amateur Radio digital station platform.

The new Raspberry Pi HAT will contain a CODEC (sound card) based on the successful UDRC II and will include two amateur radio packet standard mini DIN-6 ports allowing one or two radios to be connected with PTT and SQL detect and support programs/protocols such as:

Direwolf - providing multi-speed packet radio modems (2 channels) [APRS, RMS, Xastir, URONODE, ...]
wsjt-x - K1JT family of digital modes including FT8
fldigi/flrig/... - digital modes
and more

This will be an integrated package, in a custom case, with available pre-built images requiring minimum configuration.

Please participate in the survey here, and give your opinion on GPS integration.  It is only one multiple choice question and should only take a minute of your time.

Take the Survey

Thank you.

Feel free to forward this email to appropriate individuals and mailing lists.
--


John D. Hays
Edmonds, WA
K7VE

   

Re: Compass build - Unable to locate package ircddbgateway

Jim Bates
 

Gotcha - I just ordered a UDRC II and am looking forward to it's receipt with great hope!
73 de K8OI

---
(804) 690-9143


-------- Original Message --------
On February 8, 2018 2:07 PM, John D Hays - K7VE <john@...> wrote:

You need compass if using the UDRC, for ircddbgateway/ircddbgatewayd you can use Debian/Raspbian

There are .deb files under http://archive.compasslinux.org/pool/main/i/ircddbgateway/  (you can add archive.compasslinux.org as a repository or pull the debs, including dependencies).


On Wed, Feb 7, 2018 at 5:48 PM, 임성규 <hopeseoul@...> wrote:
1. "https://nw-digital-radio.groups.io/g/udrc/wiki/Configuring-ircDDBgateway" will generate an error.
2. I use the standard Debian based Linux system.

2018-02-08 9:44 GMT+09:00 Jim Bates via Groups.Io <jim.bates=protonmail.com@groups.io>:
Guys,
Thanks for the advice - and yes, after double checking - we're using the wrong SD card ;|  So many SD cards, So many distros, So little time.

Thank you!!!











--



John D. Hays
Edmonds, WA
K7VE

   


Re: Compass build - Unable to locate package ircddbgateway

 

You need compass if using the UDRC, for ircddbgateway/ircddbgatewayd you can use Debian/Raspbian

There are .deb files under http://archive.compasslinux.org/pool/main/i/ircddbgateway/  (you can add archive.compasslinux.org as a repository or pull the debs, including dependencies).


On Wed, Feb 7, 2018 at 5:48 PM, 임성규 <hopeseoul@...> wrote:
1. "https://nw-digital-radio.groups.io/g/udrc/wiki/Configuring-ircDDBgateway" will generate an error.
2. I use the standard Debian based Linux system.

2018-02-08 9:44 GMT+09:00 Jim Bates via Groups.Io <jim.bates=protonmail.com@groups.io>:
Guys,
Thanks for the advice - and yes, after double checking - we're using the wrong SD card ;|  So many SD cards, So many distros, So little time.

Thank you!!!





--


John D. Hays
Edmonds, WA
K7VE

   

Re: Compass build - Unable to locate package ircddbgateway

임성규
 

1. "https://nw-digital-radio.groups.io/g/udrc/wiki/Configuring-ircDDBgateway" will generate an error.
2. I use the standard Debian based Linux system.

2018-02-08 9:44 GMT+09:00 Jim Bates via Groups.Io <jim.bates@...>:

Guys,
Thanks for the advice - and yes, after double checking - we're using the wrong SD card ;|  So many SD cards, So many distros, So little time.

Thank you!!!


Re: Compass build - Unable to locate package ircddbgateway

Jim Bates
 

Guys,
Thanks for the advice - and yes, after double checking - we're using the wrong SD card ;|  So many SD cards, So many distros, So little time.

Thank you!!!

Re: Compass build - Unable to locate package ircddbgateway

Chris Andrist
 

Are you using compass Linux or just standard Debian based Linux system?

Regards,

Chris Andrist, KC7WSU

On Feb 7, 2018, at 2:48 PM, Jim Bates via Groups.Io <jim.bates@...> wrote:

Hey there,
I'm trying to help a buddy build a hotspot and we're following the instructions from HERE:  https://nw-digital-radio.groups.io/g/udrc/wiki/Configuring-ircDDBgateway

Performed steps:
sudo apt-get update
sudo apt-get install ircddbgateway ircddbgatewayd
Getting an Unable to locate package ircddbgateway


Thoughts anyone???

Compass build - Unable to locate package ircddbgateway

Jim Bates
 

Hey there,
I'm trying to help a buddy build a hotspot and we're following the instructions from HERE:  https://nw-digital-radio.groups.io/g/udrc/wiki/Configuring-ircDDBgateway

Performed steps:
sudo apt-get update
sudo apt-get install ircddbgateway ircddbgatewayd
Getting an Unable to locate package ircddbgateway


Thoughts anyone???

Re: If you will be in Seattle, March 24th -- Get tickets now. <SOLD OUT!>:

Kenny Richards
 

Greg,

Thank you for the offer, but we have that side of things fully staff. I'm afraid there isn't any 'extra' spots for people volunteering either, the room is completely booked at this point.

73,
Kenny

Re: If you will be in Seattle, March 24th -- Get tickets now. <SOLD OUT!>:

Eubank, Greg (MVA) <Greg.Eubank@...>
 

Do you need any VOLUNTEERS, to help with the video stream!? (Since I can’t purchase a ticket to attend?!!!)

 

From: main@nw-digital-radio.groups.io [mailto:main@nw-digital-radio.groups.io] On Behalf Of Kenny Richards
Sent: Thursday, January 25, 2018 13:47
To: main@nw-digital-radio.groups.io
Subject: Re: [nw-digital-radio] If you will be in Seattle, March 24th -- Get tickets now. <SOLD OUT!>:

 

On Thu, Jan 25, 2018 at 2:37 PM, Bill Vodall <wa7nwp@...> wrote:

Let's buy a keg and set up a streaming display at Jimmy Jack's.  This could be an opportunity for quite a memorable gathering...

 

​That sounds like fun! Except I have to be there to produce the video stream... ;-)

 

 

 

 

On Jan 25, 2018 14:15, "John D Hays - K7VE" <john@...> wrote:

I think how fast it sold out was a surprise to the event organizer (that's not me), but it is a 1st come, 1st served situation.

 

On Thu, Jan 25, 2018 at 2:05 PM, Eubank, Greg (MVA) <Greg.Eubank@...> wrote:

You would THINK that they would reserve a few tickets for those wanting to attend from out of state!

 

73's

 

    - Greg –

 

KL7EV

 

 



 

--

 


John D. Hays
Edmonds, WA

K7VE

 

   

 

 

Re: If you will be in Seattle, March 24th -- Get tickets now. <SOLD OUT!>:

rob@...
 

We know y’all are rock stars… just add another show! <g>

 

From: main@nw-digital-radio.groups.io [mailto:main@nw-digital-radio.groups.io] On Behalf Of Kenny Richards
Sent: Thursday, January 25, 2018 2:46 PM
To: main@nw-digital-radio.groups.io
Subject: Re: [nw-digital-radio] If you will be in Seattle, March 24th -- Get tickets now. <SOLD OUT!>:

 

I don't think the organizers expected things to sell out quite this quickly.....

Re: If you will be in Seattle, March 24th -- Get tickets now. <SOLD OUT!>:

Kenny Richards
 

On Thu, Jan 25, 2018 at 2:37 PM, Bill Vodall <wa7nwp@...> wrote:
Let's buy a keg and set up a streaming display at Jimmy Jack's.  This could be an opportunity for quite a memorable gathering...

​That sounds like fun! Except I have to be there to produce the video stream... ;-)

 


On Jan 25, 2018 14:15, "John D Hays - K7VE" <john@...> wrote:
I think how fast it sold out was a surprise to the event organizer (that's not me), but it is a 1st come, 1st served situation.

On Thu, Jan 25, 2018 at 2:05 PM, Eubank, Greg (MVA) <Greg.Eubank@...> wrote:

You would THINK that they would reserve a few tickets for those wanting to attend from out of state!

 

73's

 

    - Greg –

 

KL7EV

 

 




--


John D. Hays
Edmonds, WA
K7VE