MEASure:{FREQuency|PERiod}? [{<range>|MIN|MAX|DEF} [, {<resolution>|MIN|MAX|DEF}]]
Sets all measurement parameters and trigger parameters to their default values for frequency or period
measurements and immediately triggers a measurement. The results are sent directly to the instrument's
output buffer.
Parameter Typical Return
<range>: 3 Hz to 300 kHz. Default: 20 Hz. for FREQuency
<range>: 3.33 µs to 333.33 ms. Default: 50 ms (PERiod).
(none)
<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
l The 1 ms aperture applies only to the 34465A and 34470A.
l
The frequency or period <range> parameter is required only to specify the measurement resolution
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) Resolution (34465A/70A) Aperture
Not Applicable 100 ppm × <range> (MAXimum) 1 ms
100 ppm × <range> (MAXimum) 10 ppm × <range> (DEFault) 10 ms
10 ppm × <range> (DEFault) 1 ppm × <range> 100 ms
1 ppm × <range> (MINimum) 0.1 ppm × <range> (MINimum) 1 s
l
The input signal for frequency or period measurements has an AC voltage component. By default, this
command uses autorange to select the voltage range.
l With no signal applied, 0 is returned.
SCPI Programming Reference
286
Keysight Truevolt Series Operating and Service Guide
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