[App_rpt-users] SCOM 7330

Sun Feb 3 21:55:45 UTC 2013

Hey good stuff! The pin 21 has the inline cap and a level scaling so it 
can be driven with a little higher levels.
The other thing is pin 9 is direct input and some DC biases will muck 
thinks up. I suspect thats what happened here.

Glad you got it going.

Jon RQ
On 2/3/2013 4:57 PM, Steve Schulze wrote:
> Thanks Jon.
>
> This is exactly what I had to do.
>
> I had this system running here at home on the bench with a TKR-750 
> connected directly to the URI and no problems. So, I made a mistake 
> and thought pin 9 would work for the 7330 too. Apparently, I was using 
> the AC coupled output on the Kenwood, so it worked fine. Once I 
> switched to the AC coupled input on the URI from the 7330 the thing 
> lit up and I was able to set the input level in Asterisk.
>
> Thanks for all of your help. It's funny how we look past the obvious 
> sometimes.
>
> It's official. Node 27727 is now running in it's permanent location!
> Amateur Radio - The Original Social Media
>
> Steve Schulze - Radio Amateur, General Class - N9UDO
> Administrator, Baraboo, Wisconsin D-Star System - WB9FDZ
> Administrator, Baraboo, Wisconsin AllStarLink Systems - 27616, 27727
> Treasurer, Badgerland Amateur Television Society - KB9SFS
>
> http://yellowthunder.org/dstar.html
> On 2/3/2013 15:07, REDBUTTON_CTRL wrote:
>> Hi Steve, ok I think you said you were using pin 9 on the URI? I use 
>> pins 21 and 22 on my audio connections. I have attached a diagram of 
>> the URI to 7330. This should work.
>> Most of my stuff is wired to connect to radios using the RLC wiring 
>> but the connections to the URI are the same.
>> This diagram is for the 7330 to URI.
>>
>> Jon
>>
>> On 2/3/2013 1:35 PM, Steve Schulze - N9UDO wrote:
>>> I have all of this done. I can see 1vPP on the input to the uri. But 
>>> when I do the radio tune rx voice I get a failed response from no 
>>> audio. I have tried a different uri as well.
>>>
>>> Thanks.
>>>
>>>
>>> Sent from my Verizon Wireless 4G LTE Smartphone
>>>
>>>
>>>
>>> -------- Original message --------
>>> From: REDBUTTON_CTRL <jrorke at cogeco.ca>
>>> Date: 02/03/2013 10:31 AM (GMT-06:00)
>>> To:
>>> Cc: app_rpt-users at ohnosec.org
>>> Subject: Re: [App_rpt-users] SCOM 7330
>>>
>>>
>>> I suggest setting audio levels on the controller first, then do the URI
>>> adjustments.
>>>
>>> Set as follows:
>>>
>>> in usbradio. conf the audio setting should be :
>>>
>>> rxdemod=speaker
>>> txprelim=no
>>>
>>> This assumes the audio on the 7330 port is de-emphasized and does not
>>> require pre emphasis to and from the node.
>>>
>>> Disconnect the URI from the 7330.
>>>
>>> 1) Send a full quieting signal to the repeater with a 1k tone @ 3k
>>> deviation. Set the TX audio level on the controller URI port to 1v p-p.
>>> 2) Connect an 1K audio tone @1vp-p  to the RXA pin on the controller
>>> port and gound the COR in line. Adjust input level to get 3k deviation
>>> on the repeater TX.
>>>
>>> Now you have the controller levels fixed. You new need to adjust the 
>>> URI
>>> to these settings.
>>>
>>> Connect the URI and node to the controller.
>>>
>>> 3) Send a full quieting signal with the 1k k tone /3k deviation to the
>>> repeater and on the URI CLI console do a RADIO TUNE RXVOICE to measure
>>> the input level.
>>> (Dont worry about the RX noise adjustment - not required as you are not
>>> doing any DSP with this setup)
>>> 4) Do a RADIO TUNE TXVOICE 500 and measure the repeater deviation.
>>> 5) Repeat step 5 with different level until 3k deviation is reached on
>>> the repeater TX  deviation.
>>> 6 Do a RADIO TUNE SAVE  the set the audio levels on the node.
>>> 7) you are done.
>>>
>>>
>>> On 2/3/2013 11:13 AM, Steve Schulze wrote:
>>> > Thanks Dave for the tip. I'm heading back out to the site to work on
>>> > this some more. I will give the pull-ups a try. Maybe that's why it's
>>> > not streaming out.
>>> >
>>> > How did you resolve the setting of the receive levels running 'radio
>>> > tune rxnoise' etc, with the URI connected in this manner?
>>> >
>>> >
>>> >
>>> > Thanks!
>>> >
>>> > Amateur Radio - The Original Social Media
>>> >
>>> > Steve Schulze - Radio Amateur, General Class - N9UDO
>>> > Administrator, Baraboo, Wisconsin D-Star System - WB9FDZ
>>> > Administrator, Baraboo, Wisconsin AllStarLink Systems - 27616, 27727
>>> > Treasurer, Badgerland Amateur Television Society - KB9SFS
>>> >
>>> > http://yellowthunder.org/dstar.html
>>> >
>>> > On 2/3/2013 09:05, Dave Maciorowski wrote:
>>> >> Mornin' Steve,
>>> >>
>>> >>> Anyone have a working node using an SCOM 7330 in line?
>>> >>>
>>> >>> I currently am trying to get these two to work. It's about 80% 
>>> right
>>> >>> now.
>>> >>>
>>> >>> Audio from the node box is making it to the repeater and keying the
>>> >>> transmitter, no problem there. The problem I'm having is the audio
>>> >>> from the repeater not getting into the node box. I see the audio on
>>> >>> a scope at pin 9 (mic_in) on the URI. I also have a transition from
>>> >>> high to low on pins 7 and 8 (COR Det and CTCSS Det) when the 7330
>>> >>> tells it to transmit.
>>> >>
>>> >>   We are working on this now.  I just built a cable and needed to 
>>> add
>>> >> a pullup resistor at the URI COR input between pins 8 and 14. If
>>> >> you're using the CTCSS input, you need one there, too.  I added the
>>> >> pullup in the DB-25 shell.
>>> >>
>>> >>> On the 7330, I'm using port 1 for the repeater. Port 3 is 
>>> connect to
>>> >>> the URI.
>>> >>>
>>> >>> Paths on 7330 as follows:
>>> >>> RX-1 to TX-1
>>> >>> RX-1 to TX-3
>>> >>> RX-3 to TX-1
>>> >>>
>>> >>> In rpt.conf I have duplex=0 and linktolink=on
>>> >>>
>>> >>> In USB radio I have carrierfrom=usb and ctcssfrom=usb
>>> >>
>>> >>   73,
>>> >>
>>> >>     Dave
>>> >>
>>> >
>>> > _______________________________________________
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>>> >
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>>
>>
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