Other Primary Measurement Functions; Frequency Measurement Errors - Keysight 34450A Guia Del Usuario

Other Primary Measurement Functions

Frequency measurement errors

The multimeter uses a reciprocal counting technique to measure frequency. This
method generates constant measurement resolution for any input frequency. All
frequency counters are susceptible to errors when measuring low-voltage,
low-frequency signals. The effects of both internal noise and external noise pickup
are critical when measuring "slow" signals. The error is inversely proportional to
frequency. Measurement errors also occur if you attempt to measure the
frequency of an input following a DC offset voltage change. You must allow the
multimeter's input to fully settle before making frequency measurements.
Keysight 34450A User's Guide
Measurement Tutorial 3
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