[App_rpt-users] Audio Clipping with IAXRPT / Web Transceiver Client

[Keith Goobie]

Ken

We had to do it by ear today - not the preferred approach.  It will require
a trip to the site with the test gear.  We are much better in the ball park.

Trip is to be planned = we are fortunate that we have remote access to the
various elements that make up the system.  This is how it was configured
with the test equipment a few months ago.

[root at VE3LSR asterisk]# cat usbradio_tune_usb1.conf
[usb1]
; name=usb1
; devicenum=1
devstr=2-2
rxmixerset=500
txmixaset=750
txmixbset=500
rxvoiceadj=2.186060
rxctcssadj=0.500000
txctcssadj=200
rxsquelchadj=500
[root at VE3LSR asterisk]#

More to follow

Keith


On 3/3/13 5:00 PM, "Ken" <ke2n at cs.com> wrote:

> Yes I guess you could clobber the input side ... a symptom of that is when
> you run  "radio tune rxnoise" you would not be able to get a reasonable
> setting for the receive gain (rxmixerset= in the radio_tune_usbxxx file).
> 
> Ideally that gain setting should be somewhere in the middle of the range
> (say 200-800).
> 
> Regards
> 
> Ken
> 
> (You did run the calibration again after turning off rxboost, right?)
> 
>> -----Original Message-----
>> From: app_rpt-users-bounces at ohnosec.org [mailto:app_rpt-users-
>> bounces at ohnosec.org] On Behalf Of Keith Goobie
>> Sent: Sunday, March 03, 2013 4:00 PM
>> To: Bryan D. Boyle; app_rpt mailing list
>> Subject: Re: [App_rpt-users] Audio Clipping with IAXRPT / Web Transceiver
>> Client
>> 
>> Hi Bryan
>> 
>> Thanks for the input on the limitations of some USB hubs.  I have seen
> that
>> before on another project.  In some cases I went back to plain old serial
>> ports, but that is not possible here.
>> 
>> I will keep my eyes open for error messaging in that regard.
>> 
>> One suggestion, I did receive was to remove the rxboost and I have done
>> that.  I think it has helped and I am monitoring it.  This would suggest
> that the
>> problem was amplitude related and not jitter where I was trying to point
>> myself.
>> 
>> There will be more to follow.
>> 
>> Again thanks to all for their feedback.
>> 
>> Keith
>> 
>> 
>> On 3/3/13 3:52 PM, "Bryan D. Boyle" <bdboyle at bdboyle.com> wrote:
>> 
>>> On 3/3/2013 12:18 PM, Keith Goobie wrote:
>>>> Hi Jon
>>>> 
>>>> Just checked the configs -
>>>> 
>>>> All three appearances (we control three URI fobs) of txlinonly are
>>>> commented out, do you know what the default is.
>>>> 
>>>> Incoming audio from iaxrpt users seems OK, with no issues.
>>>> 
>>>> Keith
>>> 
>>> One other thing to check...which I'm surprised no one has mentioned,
>>> is that frequently the motherboard USB ports are crap.  Plain and
> simple.
>>> I had the same problem, which I traced down to a 'value engineered'
>>> (read as cheap as possible implementation) set of USB ports on my HP
>>> computer (who knows whose motherboard) which gave me choppy audio,
>> cut
>>> outs, etc., which simulated overdriving/limiting apparently on the
>>> systems connected.
>>> 
>>> Spent (OMG, there's that word in a ham discussion) 40 bucks for an
>>> add-on USB adapter board.  4 ports.  USB 2.0 capable.  Problem went
> away.
>>> 
>>> Just some other things to check.
>>> 
>>> Bryan WB0YLE
>>> Allstar 27295 27295 27710 etc.
>>> 
>>> 
>>> _______________________________________________
>>> App_rpt-users mailing list
>>> App_rpt-users at ohnosec.org
>>> http://ohnosec.org/cgi-bin/mailman/listinfo/app_rpt-users
>> 
>> --
>> keith at goobie.org
>> Keith Goobie
>> Richmond Hill, ON, CANADA
>> 
>> 
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> 

-- 
keith at goobie.org
Keith Goobie
Richmond Hill, ON, CANADA