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« on: 2014-01-23, 01:27:49 »
I have recently noticed that my CW transmissions are partially garbled. I don't know exactly when this started, or what might have changed. The severity varies from time to time, but it typically anywhere from about 3 to 30% of characters sent have extra or missing dots/dashes. The rx audio is quite good during these periods. Here is my setup:
Radio: K3 Twins
RemoteRig RRC-1258 MKIIS, firmware 2.75
Control ISP - cable, 15Mb/s down, 1.2Mb/s up
Radio ISP - WISP, typically 2Mb/s down, 2Mb/s up (advertised rates 750K up/down)
Keyer- external
Key delay = LF delay = 250ms
Audio - 2 x Linear 16bit 8khz
Also have a desktop computer at the remote running NaP3 (with LP-Pan) and some antenna control stuff; computer is accessed with VNC.
I took the control RRC to the remote site to test back to back, and found no problems with the RRC's; CW was solid. I have done a bunch of ping testing, and the results vary a lot with time of day. I am pinging the WISP radio unit, as I have not been able to ping anything behind it.
Typically, in the light usage hours in the middle of the day, I can usually do a 100 ping sequence and get 70ms max, 45ms ave, 0 lost. Sometimes the max will be 150ms or so, with just a few in this range; sometimes there are 2% or so lost. Testing the CW transmission in these conditions still result in around 3-5% errors.
In the evenings, the ping times do get up into the 150-200ms range, but not often more; there are sometimes 2-4% lost. The CW at these times is substantially worse.
Can anyone advise how to trouble-shoot this problem? It seems to me like the ISP performance is not so bad to be causing it to this degree.
Thanks,
Bob K5DN