Delay in Winkeyer emulation

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  • Updated 4 years ago

I had by the use of N1MM+ with keying via the Winkeyer emulation sometimes a unacceptable delay detected between the command and the start of real keying.

I make also some delay measurements in CW with keying via CAT-ports and via Winkeyer emulations ports.

Principal is always a delay to expect, because Windows is a multitasking OS. The communication via a serial port has a low priority in Windows. There will always be some delay.

Because CAT and Winkeyer both use a (virtual) serial port, I expected about the same delay on CAT and Winkeyer. But there where big differences between both methods.There where also differences between the ports at the same moment.

By use of the Winkeyer emulation was in my situation the shortest delay of the start about 170 ms and the longest delay about 700 ms (repeated difference between two Winkeyer emulation ports in the same test situation!)

By use of CAT-ports was the delay of the start between 0,5 and 2 ms.

I had the measurements repeated by different starts of the PC. After every start-up the results changes every time.

Conclusion:

The delay in CAT is minimal.

The shortest delay by use of the Winkeyer emulation is acceptable, but if the delay is to high, You can try an other Winkeyer emulation port or try a new start-up.

In general: I prefer CWX.


Greetings,

Johan PA3AIN

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Johan Schepers

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Posted 4 years ago

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Joe Duerbusch

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I have found using Writelog with keying via the Winkeyer emulation sometimes a unacceptable delay detected between the command and the start of real keying.  When I first start up at the beginning of the day, the Winkeyer works fine.  But after the computer has been on for hours, there  is a rather long delay between hitting the function keys in WL and the beginning of the Transmission.  Maybe it is the screen saver.

Along with that, I have been using a REAL Winkeyer for several years and works fine until this week when I upgraded to v1.6.21.77.  Now my REAL Winkeyer sends choppy CW.  

I will try both ways during the contest this weekend and see which works better.

Joe K0BX
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IW7DMH, Enzo

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...
I have found using Writelog with keying via the Winkeyer emulation sometimes a unacceptable delay detected between the command and the start of real keying.  When I first start up at the beginning of the day, the Winkeyer works fine.  But after the computer has been on for hours, there  is a rather long delay between hitting the function keys in WL and the beginning of the Transmission.  Maybe it is the screen saver.
...

The same here but using QArtest and my 6300 during the last contest.
I already pointed it out on another post, but, up today no feedback from FRS.

73'
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Eric - KE5DTO, Official Rep

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Thanks for reporting this.  We have several issues in the system to address latency, some specific to CW and the WInkeyer.  Stay tuned for updates on this.

On the choppy CW with your hardware Winkeyer, make sure that you have Iambic turned off.
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Joe Duerbusch

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I am glad FRS is looking into the delay.
As far as the "Choppy CW", well I think the problem is not the sending but the Xmit Audio of the Sidetone.  I noticed during the CW contest that even with the choppy sending the DX stations got my call and report 100 percent.,  Listening and watching the display it looks like the RF was going out fine but ever so often, something would distort the sending audio.
I thought it might be RF getting in to the headphones or speaker but I had the same results on other antennas, high or low power and on a dummy load.  I did not have this problem on previous versions and I have not changed anything.  I will keep looking for the problem source.

Joe K0BX