Digitale Ausgabe 32 Kanal -...

Softline

Modline

Conline

Boardline

Avidline

Pixline

Application

MCD Elektronik GmbH

Hoheneichstr. 52

75217 Birkenfeld / Germany

Fon +49 (0) 72 31/4 72 96-0

Fax +49 (0) 72 31/4 72 96-10

[email protected]

www.mcd-elektronik.de

HQ : Birkenfeld

Managing CEO : Bruno Hörter

Register Court Mannheim

HRB 505692

V1

.0 2

01

2-1

1-3

0

Instruction manual

Manual for operating the hardware and software

MCD Audio Analyzer

Elektronik GmbH MCD Audio Analyzer / AudioAnalyzer.NET Instruction manual

von 38

Table of Contents

1. GENERAL........................................................................................................................................................................ 4

1.1. ARCHITECTURE .................................................................................................................................................................. 4

1.2. FUNCTIONS/ FEATURES ....................................................................................................................................................... 4

2. INSTALLATION ............................................................................................................................................................... 5

2.1. SYSTEM REQUIREMENTS ...................................................................................................................................................... 5

2.2. INSTALLATION ................................................................................................................................................................... 6

2.3. DEINSTALLATION ............................................................................................................................................................... 6

3. INFO AND LICENSE ......................................................................................................................................................... 7

3.1. ABOUT ............................................................................................................................................................................ 7

3.2. REGISTER ......................................................................................................................................................................... 7

4. PROJECT MANAGER ....................................................................................................................................................... 9

4.1. SAVE ............................................................................................................................................................................... 9

4.2. LOAD ............................................................................................................................................................................... 9

4.3. SAVE CURVE...................................................................................................................................................................... 9

4.4. LOAD CURVE ..................................................................................................................................................................... 9

4.5. PRESETS ........................................................................................................................................................................... 9

4.6. EXIT ................................................................................................................................................................................ 9

5. DEVICE SELECTION ....................................................................................................................................................... 11

5.1. INPUT ............................................................................................................................................................................ 11

5.2. OUTPUT ......................................................................................................................................................................... 11

5.3. AUDIO GAIN.................................................................................................................................................................... 13

5.4. MIXER OVERVIEW ............................................................................................................................................................ 13

5.5. RESET ............................................................................................................................................................................ 13

6. GENERATOR ................................................................................................................................................................. 14

6.1. GENERATOR 1 - 5 ............................................................................................................................................................ 14

6.2. MORE ........................................................................................................................................................................... 14

6.3. GENERATOR DISPLAY ........................................................................................................................................................ 15

6.4. DISABLE ALL .................................................................................................................................................................... 15

6.5. WAVE FORMS ................................................................................................................................................................. 16

6.6. MODULATIONSFORMEN .................................................................................................................................................... 18


von 38

7. SWEEP ......................................................................................................................................................................... 20

7.1. SWEEP ........................................................................................................................................................................... 20

7.2. DISABLE ALL .................................................................................................................................................................... 21

7.3. WAVE FORMS ................................................................................................................................................................. 22

8. FILTER .......................................................................................................................................................................... 24

8.1. FILTER 1 TO 5.................................................................................................................................................................. 24

8.2. MORE ........................................................................................................................................................................... 24

8.3. FILTER DISPLAY ............................................................................................................................................................... 25

8.4. DISABLE ALL .................................................................................................................................................................... 25

8.5. LIVE DISPLAY .................................................................................................................................................................. 26

8.6. FFT ............................................................................................................................................................................... 27

8.7. PHASE ........................................................................................................................................................................... 27

MEASUREMENT VALUES ...................................................................................................................................................... 28

8.8. VALUES LIST .................................................................................................................................................................... 28

8.9. FREQUENCY, RMS, THD, SN ............................................................................................................................................ 28

8.10. RMS - METER ................................................................................................................................................................ 29

9. SETUP .......................................................................................................................................................................... 30

9.1. OPTIONS ........................................................................................................................................................................ 30

9.2. SHOW TOOLTIPS .............................................................................................................................................................. 31

9.3. INPUT CALIBRATION .......................................................................................................................................................... 31

9.4. OUTPUT CALIBRATION ...................................................................................................................................................... 31

10. COM/DCOM - INTERFACE ........................................................................................................................................ 32

10.1. CLASS NAME ................................................................................................................................................................... 32

10.2. GENERAL CONTROL COMMANDS ......................................................................................................................................... 32

10.3. ACQUISITION CONTROL ..................................................................................................................................................... 33

10.4. AUDIO GAIN.................................................................................................................................................................... 33

10.5. PLAYBACK CONTROL ......................................................................................................................................................... 34

10.6. GENERATORS .................................................................................................................................................................. 34

10.7. SWEEP ........................................................................................................................................................................... 35

10.8. FILTER ........................................................................................................................................................................... 36

10.9. MEASUREMENT VALUES .................................................................................................................................................... 36


von 38

1. General

The AudioAnalyzer.Net is a software based solution for the analysis and generation of analog and digital signals in the audio range. In this case, standard PC - Components with Microsoft ® Windows XP or below operating systems can be used (including Windows7 ®).

For analysis of the audio signals in addition to the frequency and signal strength of various measurements, measurements of the distortion factor and the FFT spectrum are possible. Through the integrated signal generators, different waves and modulation forms are generated. The surface of the audio analyzer can be widely adapted and adjusted to varying applications. All functions of the audio analyzer can be controlled using a COM server interface from other Windows programs. The obtained values can also be integrated into a variety of programs. Special programming knowledge is not required. As input, both analog and digital sources are possible. The following document provides a system manual and describes the installation, the architecture and functions of the audio analyzer.

1.1. Architecture

The Audio Analyzer is a software-based solution for the analysis and generation of analog and digital signals in

the audio range. The audio signals are recorded on a sound card and in digitized form provided by the audio

analyzer. Generated signals are also output through the sound card. Optionally, external amplifiers that adjust

the different input levels can be up streamed. The attenuation of this amplifier can in turn be controlled via a

serial RS232 connection from the audio analyzer. Aside from using the audio analyzer as a standalone application

it is also possible to remotely control all functions and values of other Windows programs or scanning. For this

purpose a COM-Client/Server interface is used. The exact use of this interface is described later in this document.

1.2. Functions/ Features

Modern and user-friendly user interface

Extrem flexible user interface design

Efficient FFT analysis

Efficient generators (AM, FM, PM - Modulation)

Easy to use filters

Data Import and Export

Support of multiple sound cards in a PC

Extremely fast measurement functions for frequency responses, phase response, and much more.

Access to all mixer settings

Very high accuracy of measurement calculations

Wide range of measurement functions, such as amplitude, RMS, frequency, harmonic distortion, phase and much more.

Automatic calculation and display of the frequency and phase response

Typical measuring times of a frequency response of 0 to 24 kHz are 200 - 300 ms

Sweep-Funktions

Loading and saving of all settings via project files


von 38

Remote controllable through all external systems

Analog, Digital inputs are selected via Sound Card Selection

Adaptation via audio gain controller on measuring signals

2. Installation

The following section describes the installation of the AudioAnalyzer.Net.

2.1. System requirements

Software:

Operating system: Windows2000®, Windows XP®, Windows7®

Architecture: 32bit or 64bit

.Net Framework: starting at Version 2.0

Hardware:

Windows compatible audio controller (sound card)

Minimum requirements for processor and hard drive


von 38

2.2. Installation

For the installation, please call up the provided MCDAudioAnalyzer.Net.msi installation program and follow the

on-screen instructions. Before installing any update, be sure to uninstall any other existing version.

The program directory for the installation of the audio analyzer can be set. It should be noted that for the

implementation of the Audio Analyzer, write permissions must exist for this directory.

To protect the audio analyzer against unauthorized use, it is necessary to license the audio analyzer after

installation. A detailed description of the licensing is done later in this document. For demonstration and testing

purposes, the audio analyzer can be operated for 30 minutes without a license. Some program features are

disabled.

2.3. Deinstallation

To uninstall application follow as usual: Windows- Control Panel> Programs and Functions.


von 38

3. Info and license

The Info menu displays the program version and the activation of the license for the audio analyzer.

3.1. About

Display of version information

3.2. Register

In order to unlock the audio analyzer, the following dialog will be used.

Where you can see:

1. The license status is provided:


von 38

2. A permanent license may be requested:

3. Activating a short time license:


von 38

4. Project Manager

In the Project Manager, the current settings and the layout of the audio analyzer can be saved and loaded. (All

windows can be freely positioned and arranged according to their own needs.) Furthermore, the logger can be

activated and the program be closed.

4.1. Save

Via the Save command, all current settings are saved in a project file. The current window positions are retained

therein also.

4.2. Load

Via the command load previously saved settings can be reloaded. The original window positions are restored.

4.3. Save curve

Via the Save command, the current captured input curve can be saved.

4.4. Load curve

Via the Load curve command, a saved curve can be reloaded. All curve values (RMS, THD, FFT, Phase, etc.) are

newly configured and displayed. Currently running recordings are stopped.

4.5. Presets

Here, for example predefined settings can be accessed.

Logger

This command enables the log window. Depending on the settings in the setup the audio analyzer creates log

messages (errors, warnings, information ...), which are shown here.

4.6. Exit


von 38

This will exit the program. If the program was started as a COM server, it cannot be stopped, and this menu item

is deactivated.


von 38

5. Device selection

Here, various equipment settings can be performed.

5.1. Input

In this dialog, you may select the sound card, which is to be used for recording. If the selected sound card has

multiple inputs, the desired input can be selected.

With the check box Run the recording is started and stopped.

Via Sample rate and bits per sample, the quality of the recording can be set. Buffer size decides on the duration

of a single recording cycle.

With the button 2 ^ n the buffer size is increased to the power of two. These values are particularly useful for

frequency response analyzes and use the internal FFT analysis from optimal.

With the button 10 ^ n is the buffer size multiplied to the next power of ten increased with the sample rate.

These values are particularly suitable for the graphical display (triggering).

With the selection FFT window type, the calculation of the FFT analysis utilized window function can be

determined. In general, the selection of the Hanning - windows is the best choice.

5.2. Output

This dialog is used to select the sound card, which is to be used for playback. As the sound cards typically provide


von 38

the output signal always on multiple outputs, also, three different calibration settings (analog, digital and

internal) can be selected.

Via Sample rate and bits per sample, the playback quality can be set.


von 38

5.3. Audio gain

If in the input adaption is an AudioGain-Controller of MCD Elektronik between signal source and sound card

connected and enabled in setup, the desired measurement range can be set here.

Furthermore, the calculated correction factor is displayed.

5.4. Mixer overview

For test and diagnostic purposes here all mixer, playback and recording devices and their settings can be

displayed.

For the application and interpretation of this display in-depth knowledge of the Windows sound API are required.

5.5. Reset

This will reset all settings (except the display) of the audio analyzer to predefined values.


von 38

6. Generator

With the help of the generators with the Audio Analyzer can different output signals be generated. There are up

to 10 generators available. The outputs of the generators can be either mixed or modulated.

6.1. Generator 1 - 5

Here the first 5 generators can directly be called up. For each generator the following settings can be made:

Activation of channels 1 and or 2

Wave forms (see below)

Frequency

Startfrequency for a multi sinusoidal

Stop frequency for a multi sinusoidal

Step size for a multi sinusoidal

Amplitude

Designation of whether the amplitude is given as RMS value (for sinusoidal waveforms)

Phase shift chanel 1

Phase shift chanel 2

Selection of the modulation (no, AM, FM, PM - see below)

Selection of the generator, which is to be modulated.

If a modulation is selected, it means that the generator not directly produces an output signal, but that the signal

of this generator is used to modulate a different generator. So that there is no feedback, a generator can always

modulate only a subsequent generator.

6.2. More

Here you can access generators 6 to 10.


von 38

6.3. Generator Display

A curve output can be called up her for visualization of the generated waveforms.

Here, you can click the left mouse button, to enlarge the display. Using the right mouse button, a context menu

can be activated, in which various settings (see figure) can be made.

Furthermore, here, the curve data can be printed or exported.

6.4. Disable all

Disables all generators


von 38

6.5. Wave forms

Wave forms Description Example

Sine Sine waveform suitable, e.g. for

RMS and distortion measurement

Square Square waveform suitable, e.g. to

investigate the slope

Triangle Triangle waveform, e.g. for

modulation

SawPos SawPos waveform ( with increasing

development), e.g. for modulation


von 38

SawNeg SawNeg waveform ( with declining


Noise Noise, e.g. for simulation of drop-in

signal

MultiSine

Multiple sine (uniform

superposition of several sine wave

forms), e.g. the filter test

Impuls1

Pulse signal, designed especially for

a fast frequency response and

phase response determination

within a single measurement cycle.

(The accuracy increases with

increasing sampling rate.)

The pulse width is determined by

the selected sampling rate for

recording control!


von 38

Impuls2

Pulse signal, especially designed for

a fast frequency response

calculation in a single measuring

cycle. (More specific than Impulse1

but not suitable for phase

transition.)

The pulse width is determined by

the selected sampling rate for

recording control!

6.6. Modulationsformen

Modulation Description Example

AM Amplitude modulation

FM Frequenz y modulation


von 38

PM Phase modulation

(Phase modulation by means of a square wave signal and 180

degrees modulation factor)


von 38

7. Sweep

When using the sweep, a single or continuous sweep signal can be generated with the AudioAnalyzer.

7.1. Sweep

Here, the sweep output can be called up. The following settings can be made:

Activation of the channels 1 and/or 2

Waveform (see below)

Frequenzy interval

Amplitude intervall

Marking whether the amplitude is expressed as RMS-value (for sine waveform)

Interval for the phase shift channels 1 and 2

Duration of sweeps

Number of sweeps (0 = infinity)

The sweep is started using the Start button. An ongoing sweep can be stopped by clicking the Stop button.


von 38

Sweep Display

For the visualization of the generated sweep, a curve output can be called up.

In this display, use the left mouse button, to enlarge the display. Using the right mouse button, a context menu


Furthermore, here the curve data can be printed or exported.

7.2. Disable all

Disables the sweep


von 38

7.3. Wave forms

Wave form Description Example

Sine Sine waveform suitable, e.g. for RMS

and distortion measurement

Square Square wave form, suitable e.g. for

examining the slope

Triangle Triangle wave form. e.g for

modulation

SawPos SawPos wave form (with increasing

development),e.g. for modulation


von 38

SawNeg SawNeg wave forms (with declining



von 38

8. Filter

Using the filter, the input signal can be treated before the signal analysis. There are up to five filters available. The

filters are "in line" positioned.

8.1. Filter 1 to 5

Here, you can call up filters 1 to 5 directly. The following settings are available:

Activation of channels 1 and/or 2

Filter type (high pass, low pass, band pass and band rejection)

Start and stop frequency for band pass and band rejection

Cut off frequency for high and low pass

Amplification/damping

Filter order

It should be noted that the filter order has an effect on all filters. For all filtering, the highest filter order set is

always used. A high filter order usually causes steeper flanks on the cut-off frequencies, but requires more

processing power. A too high of a filter order results in "overshoot" at the cutoff frequencies.

8.2. More

Here, you can access filters 6 to 10.


von 38

8.3. Filter Display

For visualization of the frequency response of the set filtering here, a waveform output can be called up.

In this display, use the left mouse button, to enlarge the display. Using the right mouse button, a context menu


Furthermore, the curve data can be printed or exported here.

8.4. Disable all

Disables all filters.


von 38

Visualization

Here, various displays can be called up to display. In all displays, using the left mouse button, the display can be

enlarged. Using the right mouse button, a context menu can be activated, in which various settings (see figure)

can be made.

Furthermore, the curve data can be printed or exported here.

8.5. Live Display

For visualization of the current input signals, a curve output can be called up.


von 38

8.6. FFT

For visualization of the frequency spectrum, a curve output can be called up here.

8.7. Phase

For visualization of the phase response, a curve output can be called up here.

For the synchronization of the display, additionally a reference frequency can be displayed. The display is then in

such that for the specified reference frequency, a phase transition of zero is assumed.


von 38

Measurement values

For the display of the measured values, either a table listing of all measured values can be called up or each

measured value can be displayed in a own, freely positional window.

8.8. Values list

Tabular listing display of all measurement values.

8.9. Frequency, RMS, THD, SN

Enables the display of the current reading in its own window


von 38

8.10. RMS - Meter

The current RMS - value can be further displayed in the form of a pointer instrument.


von 38

9. Setup

Here, the configuration and calibration of the audio analyzer takes place.

9.1. Options

In the area General, the determination of the window title for the audio analyzer is carried out.

In the area Logging, the configuration of the log level (Error, Warning, Info, Debug, Trace), is carried out, the

activation of the background updates when logging, even if the log window is not active and to determine

whether the log messages should be written to a file.

If in the input matching is an audio gain controller of the company MCD Elektronik connected, between the

source and sound card, can in the Audio gain the configuration of the communication for AudioGain controller

take place.


von 38

9.2. Show tooltips

This switch determines whether while using the audio analyzer to display tooltips.

9.3. Input calibration

In this dialog, the currently selected input can be calibrated using a reference source. It should be noted that for

the storage of the calibration values of the AudioAnalyzer must be run as administrator.

9.4. Output calibration

In this dialog, the currently selected output can be calibrated using a reference source. It should be noted that for

the storage of the calibration values of the AudioAnalyzer must be run as administrator.


von 38

10. COM/DCOM - Interface

Using the COM / DCOM - Interface, the audio analyzer on each COM / DCOM – capable Windows program can be

remote controlled.

10.1. Class name

The audio analyzer is accessed from this COM / DCOM class:

"MCD.AudioAnalyzerServer.Interface"

10.2. General control commands

Command/feature Description

Reset() All settings set to predefined values (except display)

Close() Closes the AudioAnalyzer. No further commands are executed.

ShowNormal() Shows the AudioAnalyzer in its actual size

Minimize() Minimizes the AudioAnalyzer

Maximize() Maximizes the AudioAnalyzer

Activate() Activates the AudioAnalyzer as active window

LoadPreset(sPreset) Loading a saved configuration of the AudioAnalyzer. In sPreset the appropriate

file name (and path) must be specified.

TopMost Marks the AudioAnalyzer as TopMost window (true/false)

WaitReset Resets the synchronization event for the wait function

Wait Waiting for new measurement values

RemoteMode

Remote mode of the AudioAnalyzers

-1: Automatic

0: User

1: Technician

2: Administrator

3: MCD

4: Developer


von 38

Title Window title of the Audio analyzer

10.3. Acquisition control

Befehl/Eigenschaft Description

InputMixerDevice Select the recording source (sound card)

InputMixerLine Select the input of the sound card

InputBufferSize Input buffer size in Samples

InputSampleRate Input sample rate for inclusion in Hz

InputBitsPerSample Resolution for inclusion in bits (8/16/24/32)

InputRun Indicates whether the membership is active (true / false)

IsInputCalibrated Indicates whether the used input channel is calibrated (true / false)

OutputRun Indicates whether playback is active (true / false)

IsOutputCalibrated Indicates whether the channel is calibrated using playback (true / false)

FFTWindowType Determines the window function, which is used for the FFT - analysis (none,

Hanning).

10.4. Audio gain


AudioGainActive Status of the AudioGain Box.

AudioGainCOMPort Selecting the COM – Ports for the AudioGain Box.

AudioGainBaudrate Selecting the baud rate for the AudioGain Box.

AudioGainAddress Selecting the address for the AudioGain Box.

AudioGainCh1

Selecting the measurement range adjustment for channel 1

0: disabled

1: 10 mV

2: 100 mV

3: 1 V

4: 10 V


von 38

5: 50 V

AudioGainCh2

Selection for the adaption of the measuring range for channel 2

0: disabled

1: 10 mV

2: 100 mV

3: 1 V

4: 10 V

5: 50 V

OutputGainCh1 Selection of the output gain for channel 1

OutputGainCh2 Selection of the output gain for channel

10.5. Playback control


OutputMixerDevice Selecting the playback device (Sound card)

OutputMixerLine Selecting the output of the sound card (relevant only for calibration values, the

readout is always on all outputs)

OutputSampleRate Sampling rate for playback in Hz

OutputBitsPerSample Playback resolution in bits (8/16/24/32)

10.6. Generators

Command/features Description

Generator<n>ActiveCh1 Activated channel 1

Generator<n>ActiveCh2 Activated channel 2

Generator<n>WaveForm Sets the waveform

Generator<n>Frequency Frequency in Hz

Generator<n>FrequencyStart Start frequency for multi sine in Hz

Generator<n>FrequencyStop Stop frequency for multi sine in Hz

Generator<n>FrequencyStep Increment multi sine in Hz


von 38

Generator<n>AmplitudeVolt Amplitude value (Top) in volt

Generator<n>AmplitudeRMS Amplitude value as RMS-value (only for sine waves form) in Volt

Generator<n>PhaseCh1 Phase shift for channel 1 in degree

Generator<n>PhaseCh2 Phase shift for channel 2 in degree

Generator<n>ModulationForm Modulation format when this generator is used to modulate a

subsequent generator.

Generator<n>ModulationIndex The generator to be modulated

<n> = 1..10

For indexing the generators several options are available:

Generator1ActiveCh1

Generator1.ActiveCh1

Generator(1).ActiveCh1

10.7. Sweep


SweepActiveCh1 Activates channel 1

SweepActiveCh2 Activates channel 2

SweepWaveForm Sets the waveforms

SweepFrequencyStart Start frequency in Hz

SweepFrequencyStop Stop frequency in Hz

SweepAmplitudeStart Start amplitude (Top) in volt

SweepAmplitudeStop Stop amplitude (Top) in volt

SweepAmplitudeStartRMS Start amplitude as RMS value (only for sine wave form) in volt

SweepAmplitudeStopRMS Stop amplitude as RMS value (only for sine waveform) in volt

SweepPhaseStartCh1 Start phase shift for channel 1 in degree

SweepPhaseStopCh1 Stop phase shift for channel 1 in degree

SweepPhaseStartCh2 Start phase shift for channel 2 in degree


von 38

SweepPhaseStopCh2 Stop phase shift for channel 2 in degree

SweepDuration Duration of sweep in seconds

SweepLoops Number of cycles of the sweep (0=indefinite)

StartSweep() Starting sweep

StopSweep() Stopping sweep

10.8. Filter


AllFiltersOff() Turns off all filters

Filter<n>ActiveCh1 Activates channel 1

Filter<n>ActiveCh2 Activates channel 2

Filter<n>FilterType Filter type

Filter<n>FrequencyStart Start or cut off frequency

Filter<n>FrequencyStop Stop frequency

Filter<n>FilterOrder Filter order

Filter<n>FilterLevel Absolute Gain / attenuation

<n> = 1..10

For the filter indexing, several options are available:

Filter1ActiveCh1

Filter1.ActiveCh1

Filter(1).ActiveCh1

10.9. Measurement values


RMSCh1 RMS for channel 1 in volt

RMSCh2 RMS for channel 2 in volt

RMSDBUCh1 RMS for channel 1 in dBu


von 38

RMSDBUCh2 RMS for channel 2 in dBu

RMSDBVCh1 RMS for channel 1 in dBV

RMSDBVCh2 RMS for channel 2 in dBV

FSCh1 FS for channel 1

FSCh2 FS for channel 2

FSDBCh1 FS for channel 1 in dB

FSDBCh2 FS for channel 2 in dB

RMSBaseCh1 RMS of the baseline frequency for 1 in volt

RMSBaseCh2 RMS of the baseline frequency for channel 2 in volt

RMSBaseDBUCh1 RMS of the baseline frequency for channel 1 in dBu

RMSBaseDBUCh2 RMS of the baseline frequency for channel 2 in dBu

RMSBaseDBVCh1 RMS of the baseline frequency for channel 1 in dBV

RMSBaseDBVCh2 RMS of the baseline frequency for channel 2 in dBV

FrequencyCh1 Frequency for channel 1 in Hz

FrequencyCh2 Frequency for channel 2 in Hz

THDAllCh1 Distortion factor for channel 1 absolute

THDAllCh2 Distortion factor for channel 2 absolute

THDAllDBCh1 Distortion factor for channel 1 in dB

THDAllDBCh2 Distortion factor for channel 2 in dB

THDOddCh1 Distortion factor of all odd harmonics for channel 1 absolute

THDOddCh2 Distortion factor of all odd harmonics for channel 2 absolute

THDOddDBCh1 Distortion factor of all odd harmonics for channel 1 in dB

THDOddDBCh2 Distortion factor of all odd harmonics for channel 2 in dB

THDEvenCh1 Distortion factor of all even harmonics for channel 1 absolute

THDEvenCh2 Distortion factor of all even harmonics for channel 2 absolute

THDEvenDBCh1 Distortion factor of all even harmonics for channel 1 in dB


von 38

THDEvenDBCh2 Distortion factor of all even harmonics for channel 2 in dB

SNADDBCh1 Signal/Noise rate incl. THD for channel 1 in dB

SNADDBCh2 Signal/Noise rate incl. THD for channel 2 in dB

PtoPCh1 Peak to peak value for channel 1 in volt

PtoPCh2 Peak to peak value for channel 2 in volt

PtoPAbsCh1 Peak to peak value un- calibrated for channel 1 in volt

PtoPAbsCh2 Peak t peak value un- calibrated for channel 2 in volt

SNDBCh1 Signal/Noise rate for channel 1 in dB

SNDBCh2 Signal/Noise rate for channel 2 in dB

DataCh1 Array containing all samples from the last measurement for channel 1

DataCh2 Array containing all samples from the last measurement for channel 2

FFTCh1 Array with FFT – analysis of previous measurement for channel 1

FFTCh2 Array with FFT – analysis of previous measurement for channel 2

All commands also exist in a version for maintenance and reading of stable readings.


StabData<command>(

iCount,

iMaxCount,

rTolerance,

rMin,

rMax,

bUseAva

)

Attaining a stable value

iCount: Number of measurements, for which the value must be stabile

iMaxCount: Number of maximal measurements, before canceled

rTolerance: maximal admissible tolerance

rMin: minimal value

rMax: maximum value

bUseAva: Return of the last or of the average value of the measurement series

Digitale Ausgabe 32 Kanal -...

Documents

Transcript of Digitale Ausgabe 32 Kanal -...