Re: P3 - Power up glitches with K3

Posted by Mike K2MK on
URL: http://elecraft.85.s1.nabble.com/P3-Power-up-glitches-with-K3-tp7122888p7123808.html

Hi Phil,

My time proven technique to find the source of K3 or P3 behavior abnormalities is to blame the computer first. Disconnect the serial cable to your PC then see if the problem still exists.

73,
Mike K2MK

Phil Westover wrote

I've got a P3 connected to my K3 with all the proper connections.  

K3 info:
s/n 1206
Firmware:  MCU 4.36, DSP 2.73, Flash Parameters 1.14
P3 info:
s/n 1490
Firmware:  1.09

When I first hooked up the P3 a few months ago, I set the jumpers (and connected a power cable) to power it up from the K3.  At that time, I got immediate connection and immediate "talking" between the P3 and the K3.  Frequency and filter width showed up correctly immediately at power up.  

After a couple of months, it appears to not immediately 'talk' with the K3 upon power up.  Sometimes no frequency nor filter bandwidth are displayed.  Sometimes frequency is displayed, but no filter bandwidth. Sometimes the bandwidth shows up and is shifted off the right.  In all cases, I can manually power down the P3 and toggle it back up, and all those things eventually show up properly.  Sometimes it takes several on-off toggles (5 or more).  In one instance, it didn't come up after several toggles, then about 10 minutes later they started talking correctly.

Cables are tightly attached.  There is no movement to the rigs during use.  This appears to be software related, not mechanical.

Ideas?

- Phil, WA7URV