[App_rpt-users] SCOM 7330

[Dave Maciorowski]

Mornin' Jon,

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

   The 7330 has jumpers on each COR and CTCSS logic input of each port.  See pages B-4 and B-5 of the 7330 manual.

   Thanks for the correction on the need for pullups on the URI.

   73,

     Dave

   I

On 2/3/2013 9:09 AM, REDBUTTON_CTRL wrote:
> 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
>>
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