Keysight Truevolt Series Operating And Service Manual page 285

SCPI Programming Reference
MEASure:{FREQuency|PERiod}? [{< range >|MIN|MAX|DEF} [, {< resolution >|MIN|MAX|DEF}]]
Sets all measurement parameters and trigger parameters to their
measurements and immediately triggers a measurement. The results are sent directly to the instrument's
output buffer.
<range>: 3 Hz to 300 kHz. Default: 20 Hz. for FREQuency
<range>: 3.33 µs to 333.33 ms. Default: 50 ms (PERiod).
<resolution>: See table below.
Specify <resolution> in the measurement's units (V, A, Hz, Ω,
and so on).
Configure frequency measurements using the default aperture. Then make and read one measurement:
MEAS:FREQ?
Typical Response:+1.32130000E+03
The 1 ms aperture applies only to the 34465A and 34470A.
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The frequency or period < range > parameter is required only to specify the measurement resolution
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parameter. It is not necessary to send a new command for each new frequency or period to be meas-
ured. The < range > and < resolution > parameters affect the aperture (gate time) as follows:
Resolution (34460A/61A)
Not Applicable
100 ppm × <range> (MAXimum) 10 ppm × <range> (DEFault)
10 ppm × <range> (DEFault)
1 ppm × <range> (MINimum)
The input signal for frequency or period measurements has an AC voltage component. By default, this
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command uses autorange to select the voltage range.
With no signal applied, 0 is returned.
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Parameter
100 ppm × <range> (MAXimum) 1 ms
1 ppm × <range>
0.1 ppm × <range> (MINimum) 1 s
default values
(none)
Resolution (34465A/70A)
Keysight True volt Series Operating and Service Guide
for frequency or period
Typical Return
Aperture
10 ms
100 ms