[App_rpt-users] signal level good enough for a URI-X?

[REDBUTTON_CTRL]

Short answer is yes.

RD line is discriminator so you would need to set the USBradio file to 
Flat audio. The rolloff of this output may not be enough for the DSP 
decoding for DSP Carrier squelch. It needs to see more raw audio above 
3khz.
So you may need to use the hardware COR lines from the repeater.

If the audio level is too low, at this input then you can set RX boost = 
yes in the USBradio file and do a re-cal to see if you get it to work 
properly. You should not need to use a hardware amp in the URI.

As for the Pins 10 and 11, They are not inputs but are out puts from the 
Kenwwod. Pin 10 is discriminator and pin 11 is RX audio and is 
de-emphasized. There may be more audio from Pin 11 and if you use this 
pin then set audio to Speaker in USBRadio.

Pins 8 and 9 are TX audio inputs to the kenwood.

Pin 8 is the TD input. This input is a "direct mod" input and is good 
from dc to 3K. it is mainly used for an External Pl tone or 1200 baud 
data input. NOTE: this input will only allow up to 2.5 Khz deviation no 
matter how hard you drive it. Ths is fixed in the Kenwood.

Pin 9 is the TA input and can take analog audio from 300 hz to 3k but 
has pre-emphasis.

So if you are connecting a URI to teh Kenwood, see the pinouts below..

TKR 850 -------- URI

8 (TD) --------- 23 (R_out)
9 (TA) --------- 22 (L_out)
10 (RD)-------- 21 (Mic in)
16 (EPTT)-------1 (PTT)
17 (SC) --------- 8 (Cor in)
12 (RXG) ------19 (Gnd)
19 (TXG) ------ 20 (Gnd)

You may need to add the extra audio grounds RXG and TXG.

Jon VA3RQ





On 3/29/2015 10:55 AM, pete M wrote:
> what not a single answer... wow..
>
>
> ------------------------------------------------------------------------
> From: petem001 at hotmail.com
> To: app_rpt-users at ohnosec.org
> Date: Thu, 26 Mar 2015 12:54:46 -0400
> Subject: [App_rpt-users] signal level good enough for a URI-X?
>
> Anyone can confirm if a signal level of  70~90mVrms  with an Output 
> impedance: 1k? or less Coupling: AC coupling Frequency response: 
> ±2.5dB at 10~3000Hz is enough to drive a URI or should I use the 
> included pre amp in the URI-X?
>
> trying to use the RD line from a tkr-750 to do USBRadio control of a 
> node.
>
> thanks
>
> And while I am at it,
>
> pin 10 and 11 of the tkr both are signal input, 10 is TD (tx data) and 
> 11 is TA (tx audio)  If I feed one side of the output to the pin 10 
> (TD) for tone signal and the other side to (TA) and apply repeated 
> audio would that make sens?
>
> Cause I did try that and It did not seem to work..
>
> thanks again for your input
>
> Pierre VE2PF
>
>
>
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