Dave sent me a log of the serial port activity from MixW, showing the steady state and the situation when he is tuning using the software and the K3.
The steady state polling form MixW to the K3 consists of the commands: IF; and FB; So basically it is polling the radio for the transceiver information (IF) which includes info such as the VFO A frequency and other items and for the frequency of VFO B (FB;). It continues to do this indefinitely. However, when the frequency is changed in the software, then the programs issues the following command each time the frequency is changed: FR0; FT0; FA00021014700 and then it continues to send these commands for as long as the frequency is requested to change. In the example I was sent, dave changed the frequency from 21014700 until 21009100. During this time, 150 commands were issued to the K3 over a period of 5 seconds. When this was complete, it took an additional three seconds before a response was returned to a subsequent IF; command. So, what does this indicate: First of all during the time that the frequency was being changed, no commands occurred to read the current frequency of the radio. That in itself may not necessarily be bad IF the program updates the VFO display in the program each time. Of course at the end of the update, if the radio did not keep up, the final frequency will change as soon as the new IF; command arrives. Now, since it took a full 3 seconds after the sequence of frequency changes, it is pretty clear that the command rate of 100ms is too short. The program had to wait for all 150 commands to complete before it could get it’s updated frequency. So, first thing is to increase the command rate in MixW to something higher. experimentation might be required. Ultimately though, if the display is not updated with the frequency during the changes, it might seem that the software can not keep up. Second, I would look in the setup of MixW and see if there is an option to enable the AI1 command (AUTOINF). If not, the software may actually respond to it, but it should be documented. You can try to set CONFIG:AUTOINF = AUTO 1 in the tech mode entries but this can have consequences for software than does not support this. The bottom line is you are polling too quick, but if the software does not update the display during the frequency updates you are out of luck. No need to look at HRD, it “works”. Hope this helps. Tom va2fsq.com ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
