Selectable Sensitivity; Pulse Characterization; Phase Measurement; Figure 1-4, Selectable Sensitivity - Racal Instruments 2461 User Manual

Selectable
Sensitivity
Pulse
Characterization
Phase
Measurement
General 1-4
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The sensitivity of the counter can be decreased to perform
measurement on a low level signal with noise. This characteristic
is very important for system applications, requiring measurement
of signals in noisy configurations.

Figure 1-4, Selectable Sensitivity

The 2461 Type C board provides automatic pulse characterization
including Rise time, Fall time and pulse Width measurements.

Figure 1-5, Pulse Characterization

Phase measurements are performed automatically.
2461Type C User Manual
Racal Instruments  1998