[App_rpt-users] Manually key ASL from command-line

Thu May 2 22:31:21 UTC 2019

James,

I don't know of any way to tell the application about the presence of 
audio without using the COS or CTCSS in simpleusb.  In usbradio, the 
application looks for the noise level to drop, and additionally 
(optionally) the presence of a PL tone.  Neither of them are going to 
exist on a microphone input.  I guess you could use the VOX function, 
but that's kind of hokey IMHO.

One thing you could try is swap the operation to the other hardware 
input.  Nothing says you need to use the COS hardware input for COS.  
You can say "No" in the configuration file for COS and use the CTCSS 
input (considering it's not blown up too) but fed from the radio's COS 
logic.  Maybe you're lucky and only the COS input is bad.  If not, 
you'll need to replace the FOB.

Kevin

On 5/2/2019 5:54 PM, James WD0JB wrote:
> Kevin,
>
> Thanks for the response.  Caught you on the hamvoip list as well.
>
> So the primary question of this post still stands.  Is there a way to 
> tell ASL to receive audio from my microphone without the COS signal?
>
> Maybe a change of direction.  Can I pull discriminator audio from the 
> UV82 and use usbradio instead of simpleusb?  If I can't get it to work 
> this way with the UV82, I do have some GM300s I may be able to use 
> with de-emphasized audio.  I am still in the very beginning stages of 
> learning how all of this gets put together, so if I use some incorrect 
> terminology, please forgive me.  These lists have been very helpful!
>
> Thanks,
>
> James
>
> On Thu, May 2, 2019 at 4:45 PM Kevin Custer <kuggie at kuggie.com 
> <mailto:kuggie at kuggie.com>> wrote:
>
>     James,
>
>      From your description, and my extensive knowledge of the CM119,
>     CM119A
>     and its variants, I believe the chip is bad.  You can try to add a
>     10k
>     pull-up externally to 3.3V from pin 48, but I doubt it'll work.
>     Hopefully you are using protection diodes on these hardware inputs,
>     otherwise, that's what blew it up.  Why?  Here's why....
>
>     There is much confusion surrounding the COS and CTCSS inputs to the
>     CM1XX chipsets.  Here is a dissertation I wrote some time ago, that
>     hopefully explains the situation well:
>
>     The COS and PL "hardware" logic inputs on CM1XX based radio adapters
>     were originally the volume-up and volume-down functions, actuated by
>     manual (push button tactile) switches in a standard audio adapter
>     (FOB).  These inputs are internally pulled high, to 3.3 V, and
>     have to
>     be pulled low enough to become valid.  As such the push-button
>     switches
>     made a good ground when depressed, as that's what the other side
>     of the
>     switch was tied to - ground. Most AllStar radio adapters use
>     protection
>     diodes (BAT-43's) that don't allow voltage to be sent into the CM1XX
>     chip.  If voltage is allowed to be inputted to these pins, the
>     chip is
>     destroyed. So - with the diodes in place, it doesn't matter what
>     voltage
>     is present on the COS or CTCSS hardware inputs, because voltage on
>     these
>     pins doesn't make anything happen, and because of the protection
>     diodes,
>     doesn't hurt anything if voltage is present. Pull-up resistors are
>     totally unnecessary, because we need a ground to assert the condition.
>
>     Okay, so the CM108/119's logic inputs are looking for a ground to be
>     valid.  This "active low" condition is required NO MATTER if the
>     setting
>     in the conf file is upright or inverted.  So - the setting in the
>     configuration file doesn't change the fact that the adapter needs an
>     active low to be valid and assert the condition. All this software
>     setting does is change if the low condition exists when the radio is
>     hearing a valid signal, or when it's not.  Using a DMM, you can
>     read the
>     voltage on the CM119 side of the BAT-43 diodes to see if the logic
>     level
>     is properly changing from 3.3V (2.4 in some instances) to 0.0 (or
>     a few
>     tenths of a volt).
>
>     Not all radio logic signals are created equal.  Some logic
>     circuits can
>     source current, but lack the ability to sink. Sometimes active high
>     circuits (circuits that provide a voltage when the state becomes
>     active)
>     don't have the ability to pull to ground very well. These circuits
>     may
>     not have the capability to pull the COS and CTCSS inputs low
>     enough on
>     the radio adapter to become valid/active.  A pull-down resistor can
>     help, but nothing beats a real active low circuit.  A 2N2222 (or
>     similar
>     NPN transistor) with the emitter grounded usually works well.
>
>     Hope this helps...
>
>     Kevin
>
>
>
>     On 5/2/2019 4:07 PM, James WD0JB wrote:
>     > All,
>     >
>     > Is there a way to manually key from the Asterisk command-line, or
>     > other, to transmit when using a USB fob without the COS
>     activated?  I
>     > have a fob that I cannot key with pin48 on CM119, but I still
>     want to
>     > use the fob, possibly as a radio-less node with a headset /
>     > microphone. I cannot key with pin48 on the CM119 because there
>     is not
>     > the proper voltage on that pin to pull down.
>     >
>     > If anyone has any suggestions, I am using the SYBA UAUD compact
>     fob.
>     > This Amazon link: https://www.amazon.com/dp/B001MSS6CS
>     >
>     > Also, these fobs (I've tried 2 so far) have an eeprom chip on them
>     > (FT93C46A).  Any others I've seen used in this manner from forum
>     posts
>     > do not appear to have this chip, however, removing the chip does
>     not
>     > resolve the issue.  One fob has 200mv the other has about 1volt.
>     > Nothing else connected to the pin.
>     >
>     > Thanks in advance for any help.
>     >
>     > James
>
>
>
> -- 
> 73,
>
> James WD0JB

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.keekles.org/pipermail/app_rpt-users/attachments/20190502/f1be6a48/attachment.html>