[App_rpt-users] SCOM 7330

[REDBUTTON_CTRL]

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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