[arm-allstar] TX level in simpleusb-tune-menu

Sun Aug 30 15:44:37 EST 2015

Since your rxboost is off and your rxlevel is very low, I believe your physical interface from your radio is much too hot. you are over driving the rpi in my experience which will cause your lack of tx level control.
my suggestion is to add a resistor from the receiver to the URI audio input.
to adjust start by playing the status message "*70" (you might need to do this from the client because your dtmf might not be working yet,  rpt fun <node #> "*70"
then set the txlevel A to the correct audio level   Ignore the receiver audio at this point!
Next reset your rx level closer to 500. one of my nodes is 450 btw you might have to repeat this step until you get the resistor value correct. fine tune the rxlevel using simpleusb-tune-menu settings
verify dtmf decode by going into the client and hitting one digit at a time. the client should display each digit

Thanks
73 Neil Sablatzky  K8IT
Allstar Node 41838 KITLINK
Allstar Node 42087 KITLINK HUB
IRLP Node exp0068
Echolink K8IT-L
WIRES-X K8IT 11479 Room 21479

From: KD8USF 
Sent: Sunday, August 30, 2015 4:01 PM
To: ARM Allstar 
Subject: Re: [arm-allstar] TX level in simpleusb-tune-menu

The RX level is currently set at 50 for simpleusb, and it has a normal level. DTMF works just fine. I'm able to set the RX level in simpleusb-tune-menu, that works, it's just the TX level adjustment does nothing. I played with usbradio, and I found it odd that the level settings in usbradio had to be set differently than on simpleusb. For example when I played with usbradio the RX level was set at 500 and was normal audio level. When I switched to simpleusb a setting off 500 for RX was way too hot. In fact the default settings in usbradio were just right. The default RX settings in simpleusb however were way too hot and the default TX only slightly hot. I switched to simpleusb because my audio going out to the allstar network was slightly broken up, but I wasn't using any of the DSP features anyway. Just a COR signal.

Andrew.

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From: Neil k8it <k8it at cac.net>
To: KD8USF <kd8usf at yahoo.com>; ARM Allstar <arm-allstar at hamvoip.org> 
Sent: Sunday, August 30, 2015 3:13 PM
Subject: Re: [arm-allstar] TX level in simpleusb-tune-menu

To make suggestions on how to fix your issue we still need to know the RX LEVEL     Some times people over drive the rx level which can be one of several root causes for your problem. Also does DTMF decoding work? 

Thanks
73 Neil Sablatzky  K8IT
Allstar Node 41838 KITLINK
Allstar Node 42087 KITLINK HUB
IRLP Node exp0068
Echolink K8IT-L
WIRES-X K8IT 11479 Room 21479

From: KD8USF 
Sent: Sunday, August 30, 2015 12:24 PM
To: Neil Sablatzky ; ARM Allstar 
Subject: Re: [arm-allstar] TX level in simpleusb-tune-menu

The A level is set to 450, B level 500, no Pre or De,. I have audio configured for A and B is off but I tried adjusting both of them and no change. Not using rxboost, or txboost. The RX adjustment works just fine...

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From: Neil Sablatzky <k8it at cac.net>
To: KD8USF <kd8usf at yahoo.com>; ARM Allstar <arm-allstar at hamvoip.org> 
Sent: Sunday, August 30, 2015 8:50 AM
Subject: Re: [arm-allstar] TX level in simpleusb-tune-menu

 Andrew I have been through this several times myself first question what is your receive level your transmit a level and your transmit b  level if you hit option P you'll get them also is rxboost turned on or off and are you using any Pre or De  emphasis settings?
73 Neil K8IT

Sent from my iPhone

On Aug 30, 2015, at 4:31 AM, KD8USF <kd8usf at yahoo.com> wrote:

  I think i've seen something about this before but I wanted to slightly reduce the TX level a bit, and using menu option 3 I lowered it some and no change. I lowered it some more and no change. So I lowered it way down and still same audio level. Audio is on source A. The RX level works just fine but the TX level does nothing. I did however discover that alsamixer will change the TX level. Am I missing something here? The node is running on a Pi2.
  Thanks.
  Andrew.

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