Remarks
l <expected> is the expected value of the ratio, not of either individual input frequency.
l
As defined in the SCPI standard, <resolution> must be specified in absolute frequency (hertz), not as a
fraction of the input signal frequency.
l The frequency of the first channel in the channel pair is used as the numerator of the ratio; the second
channel as the denominator.
l The input channels are configured for auto-leveling at 50% with a positive slope.
l The gate source (see SENSe:FREQuency:GATE:SOURCE) is set to TIME.
l
The counter uses the <expected> and <resolution> parameters to configure the setting for the
SENSe:FREQuency:GATE:TIME command. The table below shows the relationship between relative res-
olution and gate time in seconds, where relative resolution = <resolution> / <expected>.
Relative Resolution
Gate Time
(53220A)
Gate Time
(53230A)
≤ 1.1E-14 1000 sec 1000 sec
>1.1E-14 to ≤1.1E-13 1000 sec 100 sec
>1.1E-13 to ≤1.1E-12 100 sec 10 sec
>1.1E-12 to ≤1.1E-11 10 sec 1 sec
>1.1E-11 to ≤1.1E-10 1 sec 100 msec
>1.1E-10 to ≤1.1E-9 100 msec 10 msec
>1.1E-9 to ≤1.1E-8 10 msec 1 msec
>1.1E-8 to ≤1.1E-7 1 msec 100 usec
>1.1E-7 to ≤1.1E-6 100 usec 10 usec
>1.1E-6 100 usec 1 usec
l Use READ? or INITiate[:IMMediate] to start the measurement.
Examples
The following example configures the instrument for frequency ratio measurements between channel 1
and channel 2 using default parameters, makes two measurements, and then transfers the measurements
to the instrument output buffer.
CONF:FREQ:RAT
SAMP:COUN 2
READ?
Typical Response: +1.00230000000000E+001,+1.00190000000000E+001
The following example configures the instrument for 10-digit frequency ratio measurements between
channel 2 and channel 1, makes one measurement using an external trigger, and then transfers the meas-
urement to the instrument output buffer.
CONF:FREQ:RAT 1.2,1e-10,(@2),(@1)
TRIG:SOUR EXT;SLOP POS
Keysight 53220A/53230A Programmer's Reference 127
CONFigure:FREQuency:RATio
To Next Page
Loading...
