[Elecraft] K3 Filter Plots

[Mike Downs]

Guy wrote:

> I too had the serial port lockup, and had to reboot windows to release the
> hold on it.

 Please download the most recent version of the program. This problem has 
been fixed.

>The program explicitly should leave the RTS/DTR alone.

The program does not use the RTS or DTS lines, but if the K3 has Config 
Autoinfo set to Auto 1 the K3 could be keyed. I have revised the program to 
disable the RTS/DTR lines while it is running. This version will be uploaded 
to my web site tonight.

>Once I started a scan I was never able to stop it.

The scans/procedures operate under control of a Do Loop and as a result the 
program is slow to respond while the scan is in progress. Usually, if the 
user clicks Stop Test/Stop Sweep the procedure will end within several 
seconds. Sometimes you have to click the button a second time. The 
procedures are purposely slow because each time the RF Gain or Frequency are 
incremented it is necessary to wait a couple of seconds for the dBV reading 
to settle.

>Doc doesn't give any help about how to set RF gain, and what the numbers 
>mean. That would be really helpful.

Agreed. I am working on improved Help now and this enhancement will be 
included.

> I think it would be helpful to have the scan automatically add or subtract
> the preamp to extend the vertical range of the scan off the passband.

I will ask Jack Smith about this. He is the technical expert. Thank you for 
your observations and suggestions Guy.

Mike, KS7D