[App_rpt-users] SCOM 7330

[REDBUTTON_CTRL]

Since you are connecting the URI to the controller there is no need to 
use the ctcss input to the URI. I'm assuming the 7330 is validating the 
pl on the repeater port.
You only need to make the following connections:

cont PTT - URI COR
cont COR - URI PTT
cont TXA - URI RXA
cont RXA - URI TXA

You may need a pullup resistor on the controller cor input though.

The URI does not require pullup resistors (they are internally built in) 
on the cor and ctcss inputs. What they require is a transition to ground 
in either active hi or active low.  So they can be connected to open 
collector outputs. No voltage needs to be sourced to the URI. The inputs 
are diode isolated to block the volatage anyway.

Since the PTT from the controller is act lo, then the "corfrom" needs to 
be set to usbinvert for active low.
and the ctcss input on the URI can be ignored.

> In USB radio I have carrierfrom=usb and ctcssfrom=usb 

Set carrierfrom to usbinvert and ctcssfrom=no and comment out the pl 
frequencies in the default tone, RX tone and TX tone lines.

Restart Asterisk then you should get audio to the node from the controller.

Hope this helps.

Jon VA3RQ


On 2/3/2013 10:05 AM, 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
>