[Elecraft] RE: KDSP2 problem

[Lyle Johnson]

Hello Vic!

> I just finished my KDSP2.  It passed the initial check, including the
> menu display.  Now that it's buttoned up, however, it does this:
>
> 1) Tapping DISPLAY causes it to say "nSTnot i" which I presume is an
> attempt to say "not inST".

This means there is an auxbus timing problem.

> 2) Further tapping of DISPLAY only brings up the voltage/current display.

As soon as the K2 MCU once has a problem with talking to the DSP, it assumes
the DSP is not there and refuses to attempt to talk to it again until the
next power cycle.

> 3) Holding AFIL, however, does change DSP filters and they do work.

HHmmm.  Make sure the K2 secondary menu function that enables the RTC
display has not somehow gotten disabled.

> 4) Turning the radio on and off doesn't have any effect.

!!!

> Suggestions?

Unbutton the radio and see if it works again.  Make sure no cables are
routed too tightly behind the DSPx module that might cause things to get put
under mechanical strain.  If it is a K2/100, be sure the foam tape in
correctly in place and that the pressure from the tape is pushing the DSPx
into the KDSP2 and not pushing the whole assembly down toward the RF board.

If you have a remote KAT100 connected, disconnect it and see if the KDSP2
works again.

I assume this is the latest version, with MCU firmware 3.00?

-Lyle