Yutaka,
The HPS shuts off because the Ariel DSP cannot get response from the PC
cuz the PC is hanging on the error msg.  The old s/w might do better but
will have the problem of not doing the right thing w/ old system.  I think
the problem will not go away w/ old s/w, so I do not expect any difference.
To minimize the problem, turn OFF the oscilloscope sweep when NOT using the
scope actively.  This is the same problem that we originally found on the 
NIED S/V controller.  The scope panel seems to trigger the problem (I think),
that's why I asked what sweep rate you are using.

Phone Numbers here @MTS are:

	Rod Larson	(612) 937-4650
	Brad Thoen	(612) 937-4244
	Omar Rood	(612) 937-4876

Also, my home phone number is:
	(612) 934-3253
Rod Larson

At 10:49 AM 4/30/98 -0500, you wrote:
>Hello Every one,
>
>Today,when I was running the Lateral random, suddenly 469D shut off the
>HPS. It was RMS 100gal 0.1to 100Hz at function generator. There was also
>as same as Sys error in this morning. I just left 469D that night. 
>If this is 469D program error, should I use old 469D program? Please let
>me know. I'm still stay up within 30 minutes.
>If you can call me, that's OK.  My home phone Number is 03-3825-9966.
>Would you tell me your office phone Number guys?
>
>Best RGDS,
>Yutaka
>