NI vector signal analyzers, tektronix real-time spectrum analyzers and EMC tests

[emc2006]

1.       How does the performance if Ni's Vector Signal Analyzers compare to Tektronix Real-time Spectrum Analyzers?

2.       Can you emulate Tektronix FFT overlapping processing?

3.       Is it possible to use NI's Vector Signal Analyzers for EMC compliance and/or precompliance testing? Are there any companies using it successfully? Is some special or custom software needed?

Thank you

[Napoleao · Accepted solution]

        Hi emc2006

        I will answer your questions separated by your topics:

        1 - What is the factor that you want to compare between these two products? In the link below, you will find the System Performance of the NI PXI-5660 RF Signal Analyzer.
        2 - You can develop this funcionality programming in a Application Development Software, i.e. LabVIEW.
        3 - Yes, the NI´s Vector Signal Analyzer could execute EMC compliance and/or precompliance testing. In the same link below, you will find it in the Applications subdivision.

        http://zone.ni.com/devzone/cda/tut/p/id/4298 

Regards

Napoleão
Application Engeneering
National Instruments

[emc2006]

Hello Napoleão,

I am currently reading the PXI-5660 and if I have further doubts I will post them here, so everyone interested may read them.

Thanks for your help!

[LiewSC]

Does NI vector spectum analyzer compliant to CISPR 16-1-1? My understand is quasi peak and average detector are needed.

[Napoleao]

   Hi LiewSC

   Is posible to do quasi peak and average detector funcionality programming in a Application Development Software, i.e. LabVIEW from information acquired from NI Vector Spectum Analyzer

Regards

Napoleão
Application Engeneering
National Instruments

[LiewSC]

Hi Napoleao,

I was thinking the quasi peak detector is hardware different. I'm using Labview 8.6. Do you have example labview VI for the quasi peak and average detectors? Or do you know where can I find the info how to do the functionality programming for these?

By the way, do NI Vector Spectum Analyzer need pre-selector for full compliance to CISPR 16?

Can we use NI digitizer with functionality programming to have EMC compliance test as per CISPR 14 including click (discontinuous disturbance) test.

[emc2006]

Hello LiewSC,

For all I know the quasi-peak detector of a regular EMC reciver is hardware different.

Rohde-Schwarz has an FFT based EMC receiver that makes measurements in the time-domain. I guess that is a completely different approach that does not require a quasi-peak detector. Check out this link: http://www2.rohde-schwarz.com/en/products/test_and_measurement/product_categories/emc_field_strength...

I imagine the NI Signal Analyzers work the same way as this receiver, using Fourier.

Maybe the newest version of CISPR 16 covers this topic, as Rohde claims their receiver is CISPR compliant.

Bye!

Message Edited by emc2006 on 12-04-2008 11:32 AM

Message Edited by emc2006 on 12-04-2008 11:32 AM

[LiewSC]

Hi emc2006,

Thanks for the info! But do you think the pre-selector needed to comply to CISPR16?

Can NI digitizers (NI 5922) work as spectrum analyzer?

[Osvaldo_Santos]

Hi LiewSC,

Yes, NI 5922 can work as spectrum analyzer. See on the link bellow some tips about NI Digitizers Bandwidth, including NI 5922.

https://www.ni.com/en/shop/electronic-test-instrumentation/oscilloscopes/top-10-things-to-consider-w...

Regards,

[LiewSC]

Thanks, Osvaldo.

Hi EMC 2006 and Napoleao,

I found a website mention that to fulfill the requirements of CISPR 16-1-1,  high speed ADC with 16 bits resolutions is needed. The NI5661 only 14 bits only.

http://www.ce-mag.com/archive/06/ARG/braun.htm

The site also mention alternative solution is use Multiresolution with 8 bits resolution. Don't know whether NI have multiresolution instrument or not?