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NOTE
You can press SHIFT + HELP (AUTOSET) to carry out an autoset. The
instrument resets all parameters, based on the current period setting, to
remove all warning and error conditions.
An Example of Warning and Error Reporting
1 Switch on the instrument and recall the standard settings by pressing
2 Switch on the output by pressing SHIFT + 0 (ON/OFF).
3 On the Output screen, move the parameter cursor to the value of the
4 Use the knob to make the pulse width as large as possible
NOTE
Note that if you now try to adjust the leading edge from its current
setting of 5.00 ns with the knob, it cannot be adjusted. This is because the
upper and lower warning limits are currently 5.00 ns. The width is at its
maximum value and width + leading edge + trailing edge < period.
5 Press SHIFT and adjust the pulse width above its warning limit. A
NOTE
Note that as long as no errors occur, the output hardware is set up and
attempts to generate the required output.
6 Press HELP to see the warning message:
7 Press HELP again to return to the W
SHIFT + STORE (RECALL) + 0.
The period is now set to 1 µs.
W
parameter (100
IDTH
(approximately 940
This limit is intended to guarantee that the actual output pulse is
within specifications, for the actual period.
The limit is calculated taking into account a worst case combination
of minimum period from the period setting (1 µ
width from the width setting (940
and trailing edge settings (5.00
flashing W appears to indicate that a warning condition has occurred.
T
1
RAILING EDGE
MAY CUT NEXT PULSE
).
NS
).
NS
) together with minimum leading
NS
).
NS
IDTH
Using the HP 81101A
Warnings and Errors
) and maximum
S
parameter.
73
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