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I have the same Spectrum Analyzer. Using R&S InstrumentView software, you can compare up to four waveforms by clicking Get Trace and then Add Trace. The power meter function is available by connecting an external USB sensor one of the R&S NRP-Z** family.
I see that this analyzer from R&S is not very suitable for EMC measurements. I know R&S has dedicated EMC analyzers, but they cost as much as a Boeing 747. Can you recommend an inexpensive analyzer that meets EMC standards? I also see the emission level of these cables -70 dBm, I think that this is a very good level that is unlikely to affect other equipment. I remember one worker breaking the input connector of an R&S ZVB8. I called R&S and I think that they will quickly replace the connector and inexpensively. However, it took 6 months to replace the PCB and cost 10,000 euro. I was shocked.
I have a feeling that most test houses will say that for a proper measurement you need a proper EMI test receiver, and not a spectrum analyzer. Unfortunately, there aren't any budgetary ones as far as I know, and they're all comparable to a new Tesla. Having said that, in some other videos you can see me use N9010B EXA signal analyzer by Keysight. It's capable of quazi-peak measurement and it meets the CISPR 16 requirements overall. You can also find some older N9010s and N9000s from Agilent on ebay going for $5-10k, which isn't prohibitively expensive for a small-scale lab.
There are really so many crap cables out there, you need to double check everything before buying it. I saw manufacturers who are selling transparent shielded/braided USB cables but at the end did not connect them in the wire. Or some of them are using high resistance cheap wires inside...
Actually, I didn't realise they can go as high as 3GHz. Thanks Will, I'll see if I can get hold of one :) To some extent, precision is not the most important thing here. But you're probably right
@@DrEMC-sf8rx It's more about repeatability - as they they clamp around the cable they measure the current flowing on the outside of the screen, the current measured will have peaks and troughs as you move it along the cable but you can get a good feel for how good the cable is. You may be surprised that even a well terminated RG58 will have significant current on the outside of the braid as the braid does not give 100% coverage.
@@willhaylock3769 yes, that makes sense. I could see some noise even on well shielded cables with near field probes as well If I manage to get the Fischer probe, I'll put a new video up :)
@@DrEMC-sf8rx electromagnetic reflection/absorption/transmitance. So i want to test some materials sheet for shielding from electromagnetic interferance and i think i can accomplish this with a spectrum analyzer if so how to do so?
@@ajingolk7716 Ah! You'd need not just a spectrum analyzer, but also a signal generator and two wideband antennas to receive and transmit signals. But may I suggest that prior to making measurements, you may want to learn the EM theory and perhaps do some simulations in CST or HFSS where you got libraries of all common materials. This is a great resource to learn, in particular Topic 2 EM properties of materials: empossible.net/academics/21cem/
If you found this video useful, please check out my new "Practical EMC for IoT Designers" video course. This comprehensive course contains over 10 hours of video material that cover every aspect of EMC testing for intentional transmitters in accordance with Radio Equipment Directive (RED), ETSI, ITU-R, and EN standards. Apply "RF50" discount code for a 50% off during limited promotion this year only. Don't miss out!
www.pcbforemc.com/courses
I have the same Spectrum Analyzer.
Using R&S InstrumentView software, you can compare up to four waveforms by clicking Get Trace and then Add Trace.
The power meter function is available by connecting an external USB sensor one of the R&S NRP-Z** family.
I didn't think of that. Yeah that works! :)
I see that this analyzer from R&S is not very suitable for EMC measurements. I know R&S has dedicated EMC analyzers, but they cost as much as a Boeing 747. Can you recommend an inexpensive analyzer that meets EMC standards?
I also see the emission level of these cables -70 dBm, I think that this is a very good level that is unlikely to affect other equipment.
I remember one worker breaking the input connector of an R&S ZVB8. I called R&S and I think that they will quickly replace the connector and inexpensively. However, it took 6 months to replace the PCB and cost 10,000 euro. I was shocked.
I have a feeling that most test houses will say that for a proper measurement you need a proper EMI test receiver, and not a spectrum analyzer. Unfortunately, there aren't any budgetary ones as far as I know, and they're all comparable to a new Tesla.
Having said that, in some other videos you can see me use N9010B EXA signal analyzer by Keysight. It's capable of quazi-peak measurement and it meets the CISPR 16 requirements overall. You can also find some older N9010s and N9000s from Agilent on ebay going for $5-10k, which isn't prohibitively expensive for a small-scale lab.
@@DrEMC-sf8rx What options should this Agilent have to provide EMC? Could you tell me this? Thank you
There are really so many crap cables out there, you need to double check everything before buying it.
I saw manufacturers who are selling transparent shielded/braided USB cables but at the end did not connect them in the wire. Or some of them are using high resistance cheap wires inside...
Would not an RF current probe, e.g. Fischer F2000 give you more repeatable measurements?
Actually, I didn't realise they can go as high as 3GHz. Thanks Will, I'll see if I can get hold of one :)
To some extent, precision is not the most important thing here. But you're probably right
@@DrEMC-sf8rx It's more about repeatability - as they they clamp around the cable they measure the current flowing on the outside of the screen, the current measured will have peaks and troughs as you move it along the cable but you can get a good feel for how good the cable is. You may be surprised that even a well terminated RG58 will have significant current on the outside of the braid as the braid does not give 100% coverage.
@@willhaylock3769 yes, that makes sense. I could see some noise even on well shielded cables with near field probes as well
If I manage to get the Fischer probe, I'll put a new video up :)
Hi i am a hobbyiest and i was wondering if it is possible to test EM r/a/t of some materials can you help me out thanks.
Sorry, I don't understand the question. What do you mean by EM r/a/t ?
@@DrEMC-sf8rx electromagnetic reflection/absorption/transmitance.
So i want to test some materials sheet for shielding from electromagnetic interferance and i think i can accomplish this with a spectrum analyzer if so how to do so?
@@ajingolk7716 Ah! You'd need not just a spectrum analyzer, but also a signal generator and two wideband antennas to receive and transmit signals. But may I suggest that prior to making measurements, you may want to learn the EM theory and perhaps do some simulations in CST or HFSS where you got libraries of all common materials. This is a great resource to learn, in particular Topic 2 EM properties of materials:
empossible.net/academics/21cem/
@@DrEMC-sf8rx great to know that a spetrum analyzer will help, for the signal generator can i use this board
EV-ADF41513SD1Z?