Stan,
Stan wrote:
Thanks for the tip! Your method eliminates the interaction between the
effects of the CalByte 50 and CalByte 4 adjustments in a way that makes
perfect sense. After some trial and error, I found that it's easier to get
the CalByte 50 adjustment right using the short (0.01 s) timebase setting
rather than the long (1 s). My SR620 is now a whole lot more accurate and
the bias is essentially gone.
Wonderfull!
My one complaint is that I can't see the actual counter readings while I'm
adjusting the CalByte values. I haven't looked into this yet, but are the
readings being outputted from the scope or printer outputs on the rear panel
during the cal adjustments?
Use the serial port. You can adjust the calibration values using the
BYTE and WORD commands. See page 40.
read word 50:
WORD?50
write word 50 to 1234:
WORD50,1234
That way you can keep the reading on the display while using a terminal
emulator to adjust it.
It should not be too hard to make a little program to automize this
calibration.
Cheers,
Magnus
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