Signal visualization
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	Measurement of electrical parameters of signals
	Capturing frequency characteristics
	Signal generation
	Signal recording and playback
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Signal Recording and playing tools allow you to record signals from the channels of the ZET ADC/DAC modules and spectrum analyzers to a PC hard drive and play them in real time. When playing signals from files, all of the ZETLab signal measuring, displaying and analyzing programs process the data from the files.

Recorder (records signals to files)

Player (plays back signals from files)

Multichannel recorder

Viewing and processing results

So let’s say you want to record and read data but don't know which of the many capabilities of ZETLab to use. Okay, let's find out! First you need to clearly formulate the problem. Do you need to 1) record the raw signals for processing afterward, 2) continuously record certain signal parameters, or 3) save the results of current measurements?

In the first case you can use the Signal Recording program, which saves the digitized instantaneous values of the selected channels. The signals are recorded to disk and can later be played using the Signal Playback program. In all the ZETLab programs — the oscilloscope, electrical parameter measurement and spectral analysis programs - the channel list gives you a selection of recorded signals, and working with them will be the same as with signals that are fed to the devices in real time.

In continuous monitoring and control systems and systems for various types of tests for logging test results, it is convenient to use the multi-channel recorder program, which allows continuous recording of variable and constant components and the main signal frequency for several years. All the data are stored in a single text file, or you can set it up to record to a different file every day or week. We created a Results Viewing and Processing program specifically for working with signals recorded in text format. With this program not only can you view data in graphical form, but also 1) edit them in a tabular form, 2) combine graphics with conversion scales by frequency and time, 3) perform various operations with columns of data such as addition, subtraction and smoothing, 4) perform various mathematical operations and 5) calculate various parameters.

Thus, for recording signals in real time, you can use one of the following programs:

• Signal Recording. Records a pair of files - *.ana and *.anp - for each channel¹⁾
• Signal Recording (wav). Records a pair of files - *.ana and *.wav - for each channel
• Multichannel Recorder. Creates a *.dtn file. The data for each channel are put in columns

And, of course, the signal viewing and analysis programs can record the results to a file. The Multichannel Oscilloscope program can be used to evaluate not only the shape of the signals, but also to record the instantaneous values to a text file or view previously-recorded temporary signal implementations. The spectral analysis programs (narrowband, fractional octave, cross spectrum) can save not only the spectra of signals, but other parameters of the signal such as pass-throughs, cepstra, spectrograms and correlograms. The series, modal and harmonic distortion analysis programs also allow you to record measurements. When measuring AFC and PFC it is also possible to save the obtained frequency characteristics.

The files that you record can be opened in the following programs:

• Signal playback plays the signals recorded by the Signal Recording and Signal Recording (wav) programs
• Multichannel Oscilloscope allows you to view graphics that are stored in *.dtn files, each in its own window
• Results Viewing and Processing displays graphics and allows you to work with data in tabular form

For ADC/DAC modules and spectrum analyzers with optional standalone recorder, in addition to the recording and playback devices there is a Standalone Recorder program, in which you specify the script for the operation of the device in offline mode. The Standalone Recorder program also ensures correct data exchange between the flash drive and the computer. 

Autonomous recorder

File converter

Synchronization by GPS receiver

When the ZET ADC/DAC modules and spectrum analyzers are operating in standalone mode, signals fed to the input channels are recorded in the form of a pair of files - *.ana and *.anp. These files can be played back by using the Signal Playback program, translated into text format using the File Converter program or opened with the Results Viewing and Processing program.

If you order a GPS receiver with the ADC/DAC module or spectrum analyzer, the software will include a program called GPS Synchronization.

¹⁾ The pair of files *.ana and *.anp can be translated into text format using the File Converter