[arm-allstar] FT7900 Node

[Doug Crompton]

No, don't change rx boost - you have that right. That is for the RX side.
There is not boost on the TX side. You just have to use resisters if the
level is too high.


*73 Doug*

*WA3DSP*

*http://www.crompton.com/hamradio <http://www.crompton.com/hamradio>*


On Sun, Dec 10, 2017 at 2:47 PM, "James R. Pilgram via arm-allstar" <
arm-allstar at hamvoip.org> wrote:

> Go into your simpleusb.conf file and change rxboost=1 to 0
>
>   Original Message
> From: arm-allstar at hamvoip.org
> Sent: December 10, 2017 09:04
> To: arm-allstar at hamvoip.org
> Reply-to: arm-allstar at hamvoip.org
> Cc: csouleles at prodigy.net
> Subject: Re: [arm-allstar] FT7900 Node
>
> I tried to fix the formatting in the email..... hope this comes through
> better.
>
>       From: Chris Souleles via arm-allstar <arm-allstar at hamvoip.org>
> To: ARM Allstar <arm-allstar at hamvoip.org>
> Cc: Chris Souleles <csouleles at prodigy.net>
> Sent: Sunday, December 10, 2017 10:58 AM
> Subject: [arm-allstar] FT7900 Node
>
> I've just installed a Yaesu FT-7900 in a node with an RPI3 and DMK URi
> running latest version of HAMVOIP. I have it basically working and I'm
> trying to optimize the audio.  I have a couple questions.   (node
> connections and simple usb at bottom of this email)
>
> The Tx A level has to be set down to 20 for things to work.  Any higher
> and I start to get audio distortion and some audio cut out.  Is there
> something I should change in the interface to get this closer to the
> default value or is running at 20 ok as long as it works?  I'm running the
> FT-7900 in the low power mode.  (I'm not exactly sure what Tx A Level
> setting does)
>
> I have to run pre-emphasis on and de-emphasis off for it to work.  If I
> turn de-emphasis on then some of the DTMF tones don't work (mostly 3 and
> 6).  If I turn pre-emphasis off then I get some audio cut out,  Is it
> normal to have one on and the other off?
>
> When I look at Rx Voice Level it hits the 5 KHZ on peaks when I talk
> sideways to the mic.
>
> I'm interfacing to the data port on the FT-7900 as follows.  Straight
> wires, no resistors.FT7900 PTT pin 3             - URi pin 1
> FT7900 COS pin 6            - URi pin 8FT7900 Audio in pin 1       - URi
> pin 22FT79009 Audio out pin 5   - URi pin 21FT7900 GND  pin 2           -
> URI pin 20FT7900 shield                    - URI pin 20
>
> Simple USBCard is                        0Name
> is                    USBRx Level                    550Rx no
> delay                0Rx  audio delay          10Tx A
> level                    20Tx B level                    0Pre-
> emphasis            yesDe-emphasis              noPL filter
>          yesRx boost                     yesPTT
> active            activelowPTT status            unkeyedCTCSS
>      ignoredCOS                     CM108/CM119 active highCOS test
>       unkeyedCOS composite   unkeyed
>
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