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

Sun Mar 29 16:14:08 UTC 2015

Wow a big thank you. was not hoping for such detail information..
I will work with that.. Looklike I was reading some info bad from the service manual or I do need more then 4 hours of sleep a day.. (need to leave some activity out.. cant wait to hit 55 and start on a real job I like ;-) ) 
big thank you Jon.

Date: Sun, 29 Mar 2015 11:39:02 -0400
From: jrorke at cogeco.ca
To: app_rpt-users at ohnosec.org
Subject: Re: [App_rpt-users] signal level good enough for a URI-X?

    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: 1kΩ 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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