[SENSe:]{FREQuency|PERiod}:NULL:VALue {<
value
>|MIN|MAX|DEF}
[SENSe:]{FREQuency|PERiod}:NULL:VALue? [{MIN|MAX|DEF}]
Stores a null value for frequency and period measurements.
Unlike the SENSe:FREQuency and SENSe:PERiod range and aperture commands, this parameter is not
shared between frequency and period measurements. The null parameters are independent for frequency
and period measurements.
Parameter
Typical Return
Frequency: -1.2E6 to +1.2E6. Default: 0.
Period: -1.2 to +1.2 seconds. Default: 0.
+1.00000000E-02
Configure frequency measurements, using the null function to subtract 1kHz from the measurements.
Make and read two measurements:
CONF:FREQ
FREQ:NULL:STAT ON;VAL 1 kHz
SAMP:COUN 2
READ?
Typical Response: +1.0403,+1.0403
l
Specifying a null value disables automatic null value selection (
).
l
To use the null value, the null state must be on (
[SENSe:]{FREQuency|PERiod}:NULL:STATe ON
).
l
This parameter is set to its default value after a Factory Reset (
), Instrument Preset
(
), or CONFigure function.
[SENSe:]{FREQuency|PERiod}:NULL:VALue:AUTO {ON|1|OFF|0}
[SENSe:]{FREQuency|PERiod}:NULL:VALue:AUTO?
Enables or disables automatic null value selection for frequency and period measurements.
Unlike the SENSe:FREQuency and SENSe:PERiod range and aperture commands, this parameter is not
shared between frequency and period measurements. The null parameters are independent for frequency
and period measurements.
Parameter
Typical Return
{ON|1|OFF|0}. Default: OFF.
0 (OFF) or 1 (ON)
Configure frequency measurements, using the null function to subtract 1 kHz from them. Make and read
two measurements:
CONF:FREQ
FREQ:NULL:STAT ON;VAL 1 kHz
SAMP:COUN 2
READ?
Typical Response: +1.0400,+1.0400
Make a second set of measurements using automatic null value selection:
FREQ:NULL:VAL:AUTO ON
READ?
Typical Response: +0.0000,+0.0100
Keysight True
volt
Series Operating and Service Guide
339
SCPI Programming Reference
