5 Triggering and Gating
138 Keysight 53210A User’s Guide
Frequency Measurements
For frequency and period measurements the command used to set/change the
gate source is:
[SENSe:]FREQuency:GATE:SOURce {TIME|EXTernal|INPut[1]}
[SENSe:]FREQuency:GATE:SOURce? (query form)
– gate source TIME is used to achieve a desired resolution in number of digits. It
uses an internal gate signal and is the default gate source. It enables the gate
to remain open for a specified period while the input signal is measured. The
longer the gate time, the greater the resolution.
Resolution and Gate Time
Reading resolution (in digits) is a function of the gate time.
Table 5-2 shows the digits of resolution achieved with the 53210A for a given gate
time. The table also includes formulas for estimating digits as a function of gate
time or expected values, and gate times as a function of digits.
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