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!

X-Axis eXpand Max and Min

Controls: X-Axis Dialog >> Max, Min
Macros: XpandMax, XpandMin

Max and Min set the X-axis upper and lower limits, respectively, that will be shown when eXpand (or the toolbar X-Axis button or ALT+X) is active.

These values may be set manually from this dialog, even when eXpand is off.

They may also be forced to match the current cursor positions via CTRL+ALT+X (which will force eXpand on), even if the X-Axis dialog is not visible.

They may be scrolled by the horizontal arrow buttons at the left and right ends of the X axis, again even if the X-Axis dialog is not visible. This will also force eXpand on.

They may be changed by dragging the X axis with the mouse, as noted under X-Axis eXpand, again forcing eXpand on, regardless of whether the X-Axis dialog is visible.

There are separate Max and Min limits for waveform, Histogram, and Spectrum modes, as well as for X-log Spectrum. The units to the right of these controls change as appropriate for the current X axis.

Spectrogram and Spectrogram Pitch Track also have separate Max and Min eXpand limits, but here they refer to the Y axis, which may also be dragged to force eXpand on and change the limits. (The same little horizontal arrow buttons at either end of the X axis will also work to adjust the Y axis of the Sgram.) The eXpand controls are duplicated in the Spectrogram / Pitch Track Control dialog for convenience.


Macro Notes:

Note that the units used for setting Max and Min are determined by the current mode: seconds for waveform mode, volts (or User Units, if active) for Histogram mode, or hertz for linear or X-log Spectrum modes. Be sure to set the desired mode before you use either of these commands.

XpandMax=10m will set the Max limit to 10 msec in waveform mode. In Histogram mode this will set 10 mV or 0.010 User Units. In Spectrum modes it will attempt to set 0.010 hertz. XpandMin works similarly.

Alternatively, XpandMax=>1 will increment and XpandMax=>-1 will decrement the current setting by one step. In waveform mode the step size is the reciprocal of the sample rate, or about 21 microseconds at 48000 hertz. In Histogram mode, it is 1/256 of the full-scale range. In Spectrum modes it is one spectral line, or about 47 hertz at 48000 Hz sample rate.


See also X-Axis Control Dialog

GO:

Questions? Comments? Contact us!

We respond to ALL inquiries, typically within 24 hrs.
INTERSTELLAR RESEARCH:
Over 30 Years of Innovative Instrumentation
© Copyright 2007 - 2017 by Interstellar Research
All rights reserved