Chapter 6 Specifications RIGOL
M300 User’s Guide
Measuring Characteristics
Reciprocal-counting technique, AC-coupled input using the AC voltage function.
1 MΩ ± 2%, in parallel with <150 pF capacitance on any range
Measurement Considerations
All frequency counters are susceptible to error when measuring low–voltage, low–frequency signals. Shielding inputs from external noise pickup is
critical for minimizing measurement errors.
Errors will occur when attempting to measure the frequency or period of an input following a dc offset voltage change. The input blocking RC time
constant must be allowed to fully settle (about 1 s) before the most accurate measurements are possible.
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