HP 53181A Programming Manual page 221

Frequency counter
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Commands Reference
Measurement Instructions (:CONFigure, :FETCh, :MEASure, :READ)
Descriptions of the Measurement Functions— <function> (Cont.)
:MEASure[:SCALar][:VOLTage]:PERiod?
[<expected_value>[,<resolution>]][, (@1)|(@2)]
Measures Period .
The measurement arming mode is set to "digits." The Counter uses the
<expected_value> and <resolution> parameters to configure the number of digits of
resolution arming setting.
The Channel 1 trigger settings are coupled so that the measurement channel has
auto-trigger enabled at 50% with a positive slope.
Ch1
<expected_value>
range:
4.4 ns to 10.0 sec
resolution:
<expected value> should be within 10% of input peroid for
optimum arming configuration
default:
100 ns
Ch1 <resolution>
description:
value indicates decade corresponding to least significant
digit of the result
range:
1E-23 to 1E-2 sec
value which indicates 3 to 15 digits of resolution for the
specified <expected value>
resolution:
<resolution> should use a mantissa of 1.0 and be an even
power of 10
default:
value which indicates 4 digits of resolution for the
specified <expected_value>
4-63

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