[Elecraft] Real time clock in KDSP2

[Dave]

Lyle

I've since tried to reproduce the problem without success. On Sunday I was
operating portable in the RSGB low power contest with my K2 and tried using
the RTC. Running from a battery and without any significant background
noise, I decided to bypass the DSP as it wasn't needed. Every time I pressed
the "display" button to read the time, the clock had stopped and didn't
re-start in the short time I was looking at the display.

I did suspect the problem may be caused by low supply, I've tried the K2
with quite a low supply voltage and couldn't reproduce the problem in the
shack.

It would be nice to have the option to display time, instead of frequency,
as a user option. Although that's not a DSP module issue.

The bottom line is that for portable contest work the clock is a waste of
time (sorry about the pun).

Dave, G4AON


----- Original Message ----- 
From: "Lyle Johnson" <wa7gxd@fidalgo.net>
To: "Dave" <dave@astromag.co.uk>; <Elecraft@mailman.qth.net>
Sent: Sunday, July 20, 2003 11:56 PM
Subject: RE: [Elecraft] Real time clock in KDSP2


> Hello Dave!
>
> > (1) The clock doesn't appear to keep the correct time when the
> > KDSP2 is setto "Bypass" (it returns to normal time keeping when
> > the DSP is re-enabled).
>
> This shouldn't be the case. I just checked my unit and it keeps and
displays
> time with the DSP in bypass mode.  When you return to a time display, you
> have to wait for the polling loop to occur from the K2 - meaning leave it
> alone for a couple seconds - so the display will update.  It will
> *initially* display the last time you looked rather than the current time,
> then refresh itself.
>
> You have to be careful when you invoke the time display from the bypass
menu
> that you don't accidentally re-enable the DSP.
>
> I confirmed it was still in bypass mode by observing the current in the
E/I
> display (and of course by listening :-)
>
> If you have done all of this, I would be interested in a more complete
> description of the problem (e.g., the clock runs at 1/2 speed or it
doesn't
> update the hours or?)
>
> > (2) Playing back CW memories means the clock display disappears, so you
> > constantly have to keep pressing the display button.
>
> I never use CW memories, but the KAF2 should do the same thing.  The KDSP2
> uses the same facility from the K2 as the KAF2 RTC feature.