Daqarta
Data AcQuisition And Real-Time Analysis
Scope - Spectrum - Spectrogram - Signal Generator
Software for Windows
Science with your Sound Card!
The following is from the Daqarta Help system:

Features:

Oscilloscope

Spectrum Analyzer

8-Channel
Signal Generator

(Absolutely FREE!)

Spectrogram

Pitch Tracker

Pitch-to-MIDI

DaqMusiq Generator
(Free Music... Forever!)

Engine Simulator

LCR Meter

Remote Operation

DC Measurements

True RMS Voltmeter

Sound Level Meter

Frequency Counter
    Period
    Event
    Spectral Event

    Temperature
    Pressure
    MHz Frequencies

Data Logger

Waveform Averager

Histogram

Post-Stimulus Time
Histogram (PSTH)

THD Meter

IMD Meter

Precision Phase Meter

Pulse Meter

Macro System

Multi-Trace Arrays

Trigger Controls

Auto-Calibration

Spectral Peak Track

Spectrum Limit Testing

Direct-to-Disk Recording

Accessibility

Applications:

Frequency response

Distortion measurement

Speech and music

Microphone calibration

Loudspeaker test

Auditory phenomena

Musical instrument tuning

Animal sound

Evoked potentials

Rotating machinery

Automotive

Product test

Contact us about
your application!

Frequency Counter - Event Counting (Total)

Controls: Options Menu >> Frequency Counter >> Total
Macros: FcountMode=Tot, Freq, Total

When this button is active the large Frequency Counter readout shows the total number of trigger events since the last Reset.

All events meeting the Trigger Slope, Level, and Hysteresis criteria on the selected Trigger Source channel are counted. This includes trigger events that cause a trace update, additional events within a trace, and events that are not shown because they arrive between trace updates. Normal trigger mode is usually best, though Auto and Auto Level may sometimes be useful.

Alternatively, Gen Sync may be used instead of one of the above Trigger modes, for example to count the total number of Generator tone bursts with Burst Sync (or Train Sync), or the number of sweeps with Sweep Sync.

Trigger Delay may be used to position the event as desired within the trace area; it has no effect on the Total.

For events that are bursts of tone or noise, you usually want to count only the start of each event, not every individual cycle or noise excursion within the event. Trigger Holdoff allows you to specify a "dead time" during which possible trigger events are ignored; if you set it to a value somewhat longer than the burst, then the trigger detector will be locked out for the duration of the burst after the initial starting event.

The Total count continues to accumulate even if you switch to Hertz or msec modes to view frequency or period, and will read correctly when you switch back.

Total mode can count events that are distinguished by a simple level threshold, such as a burst of noise. If you need to distinguish between bursts based upon their spectra, consider SpecTot mode.

The Total button is disabled if the Min or Max button is active during Hertz, RPM, or msec modes. Likewise, if Total is active the Min and Max buttons are disabled.


Macro Notes:

FcountMode=Tot or FcountMode=3 sets the Frequency Counter to Total mode. See Macro Notes under Frequency Counter - Hertz Measurement for the complete list of mode names and numbers.

Freq is an internal variable that holds the current Frequency Counter readout value, dependent on the chosen mode (Hz, RPM, msec, Total, or SpecTot).

Total holds the count of total cycles counted since the last Reset, valid during Hz, RPM, or msec modes. This allows macros to get the Total value even when these other modes are active. Note that this does not work in SpecTot mode.


See also Event Counting, Frequency Counter

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