Okay. Thanks George and Cliff.
I have figured it out BUT....

Calibration went ok, except for the sides where there was no sound for setting the level. All other speakers are equalized at 72db. (I can't make it to 75db.)

Room Correction seems to process the first tone at 87db all right.
Then it tries at 50db and fails.
Then it tries at 65db and fails.
There is an error message (displayed only momentarily so it's hard to read).
It says that power is too low and it can't work right under 44db.

Why is this and what can I do about it?
I am using a radio shack analog sound meter with a new battery.
It doesn't make any difference whether I set the scale to 70 or 80; same result.



TJS
G68ADV, 500, DSP5200, DSP5500C, Analog surrounds.