Keysight Truevolt Series Operating And Service Manual page 336

[SENSe:]{FREQuency|PERiod}:APERture {< seconds >|MIN|MAX|DEF}
[SENSe:]{FREQuency|PERiod}:APERture? [{MIN|MAX|DEF}]
Sets the aperture time (gate time) for frequency and period measurements.
This parameter is shared between frequency and period measurements. Setting or querying the parameter
with the FREQuency version of this command is identical to setting or querying it with the PERiod version.
Parameter
{1 ms|10 ms|100 ms|1 s}. Default: 100 ms.
Configure frequency measurements using a 1 s aperture, make a measurement, and return the result:
CONF:FREQ
FREQ:APER 1
READ?
The 1 ms aperture applies only to the 34465A and 34470A.
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The aperture for frequency and period measurements does not autorange.
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The measurement resolution is related to the aperture (gate time) as follows:
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Resolution (34460A/61A)
Not Applicable
100 ppm × <range> (MAXimum) 10 ppm × <range> (DEFault)
10 ppm × <range> (DEFault)
1 ppm × <range> (MINimum)
This parameter is set to its default value after a Factory Reset (*RST) or Instrument Preset
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(SYSTem:PRESet).
Keysight True volt Series Operating and Service Guide
Typical Return
+1.00000000E-01
Resolution (34465A/70A)
100 ppm × <range> (MAXimum) 1 ms
1 ppm × <range>
0.1 ppm × <range> (MINimum) 1 s
SCPI Programming Reference
Aperture
10 ms
100 ms
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