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!

PM Sync

Macro: PMsync

The PM Sync control is available whenever this modulator is active and the Source is set to Sine.

When you toggle PM Sync on, it specifies that the display sync will be to the Sine modulator instead of the main (carrier) waveform itself.

With PM Sync set here, the modulation pattern will appear stationary on the display, although the main wave may appear to be rolling through it. Otherwise, if you sync to the main wave, the modulation pattern may roll across the display.

However, PM Sync is only effective if Trigger is active and Gen Sync is selected in the Trigger dialog. When the Gen Sync button has been activated there, it changes to show the current Sync source. In this case, it will show the channel and stream plus 'PWM'.

When Mod Source is set to use one of the other Streams as the modulator, this sync control is disabled. You can use the main wave frequency sync for that stream, if desired.

Macro Notes:

L.1.PMsync=1 sets Left Stream 1 Sync to the PM/Slope/PWM Modulator Frequency. L.1.PMsync=0 sets Sync off, and L.1.PMsync=x toggles between the two states.

Note that there is a single global Sync source, not separate sources for each channel or stream. The L.1. channel and stream prefixes select which stream will be chosen as the Sync source. When PMsync goes from on to off, the global sync reverts to the Left Stream 0 Tone Frequency until you set it to something else.

Note: If a PMsync command is given when the PM/Slope/PWM Dialog is open for any channel or stream, and the control is disabled in that dialog, then the macro will abort with an error message... regardless of which channel or stream is the target of the command. You can however, safely test PMsync with an IF statement.

SyncMode is a read-only variable that returns the current sync mode. See the full description in the Tone Sync Macro Notes section.

See also Phase / Slope / Width Modulation, PM / Slope / PWM Dialog, 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