53220A/53230A User’s Guide 83
53220A/53230A Measurements 3
Frequency Ratio
A frequency ratio measurement is the measurement of two signals in which
one signal generally serves as a reference (Figure 3-3). The signals can be dif-
ferent wave shapes and applied to any 2-channel combination on the counter.
Figure 3-3. Ratio of Two Input Signal Measurements.
The commands used to make frequency ratio measurements are:
MEASure:FREQuency:RATio? [{<expected>|MINimum|MAXimum|
DEFault} [,{<resolution>|MINimum|MAXimum|DEFault}]]
[,<channel_pair>]
CONFigure:FREQuency:RATio [{<expected>|MINimum|MAXi-
mum|DEFault} [,{<resolution>|MINimum|MAXimum|DEFault}]]
[,<channel_pair>]
- expected is the expected ratio of the two input signals. resolution is
the desired resolution of the ratio measurement. The parameter ranges are:
expected (Ch1/Ch2, Ch2/Ch1): 2.8E-10 to 3.5E+9
expected (Ch1/Ch3, Ch2/Ch3 - Option 106): 1.6E-11 to 3.5
expected (Ch1/Ch3, Ch2/Ch3 - Option 115): 6.6E-12 to 1.2
numerator channel
f
1
denominator chann
f
2
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