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:



Spectrum Analyzer

Signal Generator

(Absolutely FREE!)


Pitch Tracker


DaqMusiq Generator
(Free Music... Forever!)

Engine Simulator

LCR Meter

Remote Operation

DC Measurements

True RMS Voltmeter

Sound Level Meter

Frequency Counter
    Spectral Event

    MHz Frequencies

Data Logger

Waveform Averager


Post-Stimulus Time
Histogram (PSTH)

THD Meter

IMD Meter

Precision Phase Meter

Pulse Meter

Macro System

Multi-Trace Arrays

Trigger Controls


Spectral Peak Track

Spectrum Limit Testing

Direct-to-Disk Recording



Frequency response

Distortion measurement

Speech and music

Microphone calibration

Loudspeaker test

Auditory phenomena

Musical instrument tuning

Animal sound

Evoked potentials

Rotating machinery


Product test

Contact us about
your application!

Frequency Sweep Status Monitor

Beneath the Sweep Stairs control is the Sweep Monitor. This is a status display only, not a control. It shows the sweep frequency being computed at the time the display is updated (about 10 times per second default).

Note, however, that this is not the same as the actual output frequency at the instant you view it. The samples are computed and sent to a buffer ahead of the time they are needed for output, so this monitor is actually more of a "preview". (You can set the buffer size with the Wave Block control in the Start Preferences dialog.)

This monitor is only useful for very slow sweeps or stairs, where the values don't change too quickly to be read. At fast sweep or stair stepping rates, the monitor is likely to jump around too much to be useful.

Also, if the rate is too fast, the next update may catch it at a point in another sweep that doesn't seem to follow the prior value.

The resolution of this and all Generator frequency displays may be set between 0 and 9 decimal places via the Frequency Places option in the Frequency Step Mode dialog, invoked by clicking the button below the Start Frequency control. (The button shows the current Step Mode, which defaults to Step Direct.)

See also Frequency Sweep, Waveform Stream Controls


Questions? Comments? Contact us!

We respond to ALL inquiries, typically within 24 hrs.
Over 35 Years of Innovative Instrumentation
© Copyright 2007 - 2023 by Interstellar Research
All rights reserved