[App_rpt-users] USB Adapter has no EEPROM installed

Corey Dean n3fe at repeater.net
Sun Nov 1 16:27:37 EST 2015


I have received some personals emails and thought it would be better to answer here. Xipar does have a much wider range of audio and yes it does have filters than can be adjusted so I am not using this comparison in the usbradio / simpleusb comparison.

Dave...   Are you actually calibrating your head set with the service equipment?  If not then you don't have a base level to compare against.  I still can't find the graphs I had from this or I would post them.  The screen went on my test equipment so I can't do anymore testing until I find another screen.

Sent from my iPhone

> On Nov 1, 2015, at 3:50 PM, David McGough <kb4fxc at inttek.net> wrote:
> 
> 
> Hi Guys,
> 
> I agree 100% that personal attacks only start flame wars and don't solve 
> any problems.
> 
> However, I do agree with Fred. For those who haven't heard the difference
> between simpleusb and usbradio, I suggest a simple test with a stock USB
> sound FOB and a computer audio headset and mic combo....Put the USB FOB in
> full duplex mode and talk to yourself. While I realize this is an
> unscientific test, the difference between the two channel drivers is
> immediately obvious and striking!
> 
> While many hams out there (including myself) do have great -radio- test
> equipment, most lack the equipment to carefully check audio dynamic range,
> frequency response and other audio-specific parameters.
> 
> Incidentally, for comparison purposes, another interesting experiment is 
> to try this same headset test with one of the commercially available 
> analog controllers out there...I've tried that, too, and as expected, the 
> performance is even better, substantially better....But, I digress.
> 
> If anyone wants to try this and doesn't know how to proceed, I'll post a 
> link to my exact test setup, if interested.
> 
> Anyhow....Please don't take these comments in a negative way. My -only- 
> intention is to push the state-of-the-art forward. 
> 
> 
> 
> 73, David KB4FXC
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
>> On Sun, 1 Nov 2015, Jim Duuuude wrote:
>> 
>> Fred, this list is NOT a place for personally insulting remarks such as
> that. That type of behavior is not tolerated here.
>> 
>> Besides, as far as I am aware, Cory has, and uses, more then his 'ears'
> to make such determinations. He is one of the people on this list that 
> has good, proper test equipment, and knows how to use it.
>> 
>> Jim, WB6NIL
>> 
>> To: n3fe at repeater.net
>> From: fred at fmeco.com
>> Date: Sun, 1 Nov 2015 14:56:58 -0500
>> CC: app_rpt-users at ohnosec.org
>> Subject: Re: [App_rpt-users] USB Adapter has no EEPROM installed
> 
> 
> 
> 
>    Cory, You might have your hearing checked, you most likely think
>    d-star sounds good also.  
> 
>    I never said USBradio was horrible, simply said usbradio audio is
>    superior.  It's a subjective thing, most can hear the difference..
>    obviously you can't or you would not have made such a statement...  
> 
> 
>    The only answer to the argument you want.. Fred
> 
>>    On 11/1/15 12:54 PM, Corey Dean wrote:
>> 
> 
> 
> 
>      What degraded audio?  I have ran many many test and have yet
>        to find this 'degraded audio'.    I have heard people talk about
>        it but have yet seen any proof...
> 
>        Sent from my iPhone
> 
>        On Nov 1, 2015, at 12:32 PM, Fred Moore <fred at fmeco.com>
>        wrote:
> 
> 
> 
> 
> 
>          Larry can't answer #1. 
>          I simply program the radio to provide what I want on the
>          accessory connector, then there is no EEPROM needed.
> 
>          As for answer #2
>          When you have COS and CTCSS (PL) available use simpleUSB it
>          not only requires less processing power, it also does not
>          suffer from degraded audio.  
> 
>          Just add the file and stanza you need.. 
> 
>          regards.. Fred
> 
>          On 11/1/15 6:21 AM, Larry da
>            Ponte wrote:
> 
> 
> 
>              Two questions for the group:
> 
> 
>              #1 I'm seeing this in my /var/log/asterisk - I'm using a
>              DMK URI with EEPROM and a Motorola GM300 with one of
>              Marshall's Motorola Maxtrac, GM300 and M120 16 Pin Radio
>              to URI cables.
> 
> 
>              [Nov  1 11:30:05] NOTICE[6852]
>                  chan_usbradio.c: USB Adapter has no EEPROM installed
>                  or Checksum BAD on channel usb42372
> 
> 
>                I understand that the benefit of the DMK URI with
>                  EEPROM is that the interface configuration can be
>                  stored in the URI as apposed to (where else?) - is
>                  this URI EEPROM feature taken advantage of with
>                  app_rpt and associated drivers?
> 
> 
>                #2 How do I choose which channel driver to use -
>                  simpleusb or USBRadio?  From what I've been able to
>                  learn through varius wikis and posts on the subject, I
>                  would want to use simpleusb because all of the
>                  hardware connections for COS and CTCSS are provided so
>                  there is no reason to use the DSP features of USBRadio
>                  thus simplifying what the driver has to do and perhaps
>                  lowering the CPU utilization.  I've also read some
>                  posts that describe audio degredation in the USBRadio
>                  driver but I can't tell you the cause.  I expect the
>                  right answer here is for me to try out both and
>                  experiment - which I will do but would appreciate any
>                  wisdome from the group on their experience with these
>                  drivers when using the DMK URI and hardware
>                  connections for COS/CTCSS.  My current configuration
>                  below is getting favorable audio reports.
> 
> 
>                I have no simpleusb.conf in my /etc/asterisk
>                I have usbradio.conf and
>                  usbradio_tune_usb42372.conf
> 
> 
>                I have the following in my
>                  rpt.conf: rxchannel=Radio/usb42372
> 
> 
>                I have the following in my usbradio.conf:
> 
> 
> 
>                  [usb42372]
> 
> 
>                  hdwtype=0    
>                  rxboost=1
>                  txboost=1
>                  rxctcssrelax=1
>                  txctcssdefault=71.9
>                  rxctcssfreqs=71.9
>                  txctcssfreqs=71.9
>                  ;rxctcssoverride=0
>                  carrierfrom=dsp
>                  ctcssfrom=dsp
>                  rxdemod=flat
>                  txprelim=yes
>                  txlimonly=no
>                  txtoctype=notone
>                  txmixa=composite
>                  txmixb=no
>                  invertptt=0
>                  duplex=0
>                  rxondelay=0
>                  rxnoisefiltype=0
>                  eeprom=1
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
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> 
>          -- 
> Fred Moore
> email: fred at fmeco.com
>       fred at safes.com
> phone:  321-217-8699
> 
> 
> 
> 
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> 
>    -- 
> Fred Moore
> email: fred at fmeco.com
>       fred at safes.com
> phone:  321-217-8699
> 
> 
> 
> 
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