[App_rpt-users] Disable Receiver for X milliseconds after TX UNKEY

[William Becks]

Are you using COR and possibly CTCSS logic output from your Maxtrac?    Please define “unkey”.   Do you mean when the Maxtrac drops PTT after someone on the Internet side of the node unkeys?    If both of these are true then you should use a scope on the COR and CTCSS leads to see what happens as the radio switches back to receive from transmit. 

 

I don’t remember at the moment what Motorola radios have this feature, but some of them have a debounce setting that may solve the issue if the logic I/O’s are triggering rapidly on a change of state between transmit and receive.   If you’d like, PM me a copy of your codeplug and I’ll have a look at it.

 

Bill, WA8WG

 

E-Mail: wllmbecks at gmail.com <mailto:wllmbecks at gmail.com> 

 

 

From: App_rpt-users <app_rpt-users-bounces at lists.allstarlink.org> On Behalf Of Skyler F
Sent: Monday, August 6, 2018 5:41 PM
To: Users of Asterisk app_rpt <app_rpt-users at lists.allstarlink.org>
Subject: Re: [App_rpt-users] Disable Receiver for X milliseconds after TX UNKEY

 


Can you please be more specific what you mean by “ping pong” issue and sends a pulse through the network?   I am presently using half duplex here and have not experienced anything as you describe.  What radio are you using and how is it interfaced? 

When I unkey, the receiver keys up for 50ms sending a carrier through the network any time someone unkeys. 

 

This is a motorola Maxtrac setup as a remote base listening to a certain repeater which is setup for "TX PL on Input Only" through the radio club. The repeater is a tad bit slow on it's Transmit CTCSS turning off however, so it sends a bit through the network when the remote base unkeys. 

 

If that makes any sense....

 

On Mon, Aug 6, 2018 at 4:33 PM William Becks <wllmbecks at gmail.com <mailto:wllmbecks at gmail.com> > wrote:

Hi Skyler,

 

Can you please be more specific what you mean by “ping pong” issue and sends a pulse through the network?   I am presently using half duplex here and have not experienced anything as you describe.  What radio are you using and how is it interfaced?  

 

Bill, WA8WG

 

 

From: App_rpt-users <app_rpt-users-bounces at lists.allstarlink.org <mailto:app_rpt-users-bounces at lists.allstarlink.org> > On Behalf Of Skyler F
Sent: Monday, August 6, 2018 5:18 PM
To: Users of Asterisk app_rpt <app_rpt-users at lists.allstarlink.org <mailto:app_rpt-users at lists.allstarlink.org> >
Subject: [App_rpt-users] Disable Receiver for X milliseconds after TX UNKEY

 

I am dealing with a system (half duplex), which sends a pulse through the network. I've had this question quite a bit, but never been able to word it right. Hope this is understandable. 

 

This "ping pong" issue only occurs after the transmitter is unkeyed.  There is no way to fix this in hardware ( don't need to complicate it by going into technical details on how the link is setup)

 

RXONDELAY WORKS, but it is sort of pointless because now the beginning of everybody's transmission gets cut off, and is physically does not need to be. 

 

We are really looking for 

 

TX UNKEYS ------>   Disable RX ------ > Wait 1/4 second ------> Enable RX

 

NOT 

RXONDELAY:

USER KEYS --->  DISABLE RX ------>  WAIT 1/4 Second -----> ENABLE RX

 

Is there any way to perform the function in mind? ( in either usbradio, or simpleusb). Has anybody here thought about this before?

 

Thank You,

Skyler KDØWHB

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-- 

Skyler Fennell

amsatnet.info <http://amsatnet.info> 

KDØWHB

electricity440 at gmail.com <mailto:electricity440 at gmail.com> 

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