Author Topic: Siglent SVA1015X 1.5GHz Spectrum & Vector Network Analyzer  (Read 26075 times)

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Offline rmel

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Re: Siglent SVA1015X 1.5GHz Spectrum & Vector Network Analyzer
« Reply #250 on: January 14, 2019, 03:42:56 pm »
Thanks for the suggestion.  I'll take a look at that thread.

Shariar's video, however, is the one I linked above, where he does exactly what I am doing...

 

Online tautech

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Re: Siglent SVA1015X 1.5GHz Spectrum & Vector Network Analyzer
« Reply #251 on: January 14, 2019, 03:50:29 pm »
Thanks for the suggestion.  I'll take a look at that thread.

Shariar's video, however, is the one I linked above, where he does exactly what I am doing...
Yep, well watch it again from 37.20 where Shahriar explains that changing settings will impact the normalization and he recommends once the settings are as you want then to re normalize for accurate results.
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Offline rmel

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Re: Siglent SVA1015X 1.5GHz Spectrum & Vector Network Analyzer
« Reply #252 on: January 14, 2019, 04:20:50 pm »
Ah yes, the dots are starting to connect.

I appreciate the patience you and everyone else has shown in helping me to understand what was happening.
 
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Offline rmel

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Reference Offset and Trace View
« Reply #253 on: January 20, 2019, 07:26:53 pm »
Ok, here's another behavior that seems weird to me.

Can someone tell me what I did wrong here?

Here's what I did:

I am feeding a square wave at 30 MHz through a 20 dB attenuator to the SA.

Preset -> Amplitude -> Reference Offset -> 20dB
Peak -> Peak table on
Trace -> View

Then the peak values in the Peak Table seem to go nuts and the waveform disappears.

Here's a video I captured:

https://gfycat.com/SmallGivingAmericanwarmblood

 

Online tautech

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Re: Siglent SVA1015X 1.5GHz Spectrum & Vector Network Analyzer
« Reply #254 on: March 26, 2019, 06:29:57 am »
SVA1015X Defpom overview video:

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Offline TurboTom

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Re: Siglent SVA1015X 1.5GHz Spectrum & Vector Network Analyzer
« Reply #255 on: March 26, 2019, 07:40:59 am »
Sorry but using two *10 scope probes to "demo measure" with the SVA1015X's VNA function in an unpowered CB radio corpse is, well, a little "unresultful"   :palm:
This RF stuff definitely isn't Defpom's business, clicking through the menus isn't what really helps someone seriously interested in a purchase. Regarding things one doesn't feel "at home" with, better do yourself a favor and let others who are more into it do this job.
Watching this clip is a waste of time, and probably producing it was even more so for Defpom. He's got much better reviews in his channel than this one...

Cheers and no offense intended  :phew:
 
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Offline TheDefpom

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Re: Siglent SVA1015X 1.5GHz Spectrum & Vector Network Analyzer
« Reply #256 on: April 22, 2019, 08:49:16 pm »
Sorry but using two *10 scope probes to "demo measure" with the SVA1015X's VNA function in an unpowered CB radio corpse is, well, a little "unresultful"   :palm:
This RF stuff definitely isn't Defpom's business, clicking through the menus isn't what really helps someone seriously interested in a purchase. Regarding things one doesn't feel "at home" with, better do yourself a favor and let others who are more into it do this job.
Watching this clip is a waste of time, and probably producing it was even more so for Defpom. He's got much better reviews in his channel than this one...

Cheers and no offense intended  :phew:

What I was trying to demonstrate was the filtering effects of the tuned circuits in the RF section of the radio, and the ability to see that on the Siglent, no I wasn't trying to obtain accurate and true measurements, and at no time did I say that was what I was doing.

My reviews are done in a way to try and replicate how a new user would find the gear, something that is easy enough to capture as sometimes (such as in this case) I am not an expert in its usage having only limited experience with the particular item.
 
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Offline jemangedeslolos

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Re: Siglent SVA1015X 1.5GHz Spectrum & Vector Network Analyzer
« Reply #257 on: April 27, 2019, 02:56:50 am »
Hello,

I have some trouble with UHF RFID developpement and it is maybe the time for me to buy a this kind of tool.

Almost All Siglent instruments have been hacked.
Is this the case also for this one ?

The start price is pretty decent but It will be nice to have EMI precompliance, Advanced Measurement Kit and VNA too  >:D
 

Offline graybeard

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Re: Siglent SVA1015X 1.5GHz Spectrum & Vector Network Analyzer
« Reply #258 on: April 28, 2019, 06:07:46 am »
I just posted a video showing the power consumption, power factor, and line current waveforms for the SVA1015X spectrum/vector network analyzer.

I also demonstrate a consistent hard crash mode when the VNA mode is turned on while the preamp is on in the spectrum analyzer mode.  This crash requires a power cycling to reset.



If you missed it I also posted a review of the vector network analyzer mode a few weeks ago



I hope you find it interesting.

Chris
« Last Edit: April 28, 2019, 06:16:20 am by graybeard »
 
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Online tautech

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Re: Siglent SVA1015X 1.5GHz Spectrum & Vector Network Analyzer
« Reply #259 on: April 29, 2019, 11:10:08 am »
I also demonstrate a consistent hard crash mode when the VNA mode is turned on while the preamp is on in the spectrum analyzer mode.  This crash requires a power cycling to reset.


I hope you find it interesting.

Chris
More so amusing.  :)
Yes the bug needs fixing to protect the operator from their own usage errors.  ;)

Thanks for finding these silly UI errors for Siglent to fix. 
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Offline hendorog

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Re: Siglent SVA1015X 1.5GHz Spectrum & Vector Network Analyzer
« Reply #260 on: April 29, 2019, 02:45:57 pm »
@graybeard

IIRC it is possible to use custom cal kit in the VNA mode of the SVA - for a competent unix user.

The cal kit definition is stored in a file on the file system, and could be backed up and modified to suit another cal kit.

Also IIRC the definitions are stored in a file as mag/phase data, so any standard which one has measurement data for can be used as a cal standard.
IMHO this is a more comprehensive method than using the traditional Cx/Lx model which is what I think you are proposing. I do agree Siglent should implement custom cal kits in the UI.
 

Offline graybeard

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Re: Siglent SVA1015X 1.5GHz Spectrum & Vector Network Analyzer
« Reply #261 on: May 03, 2019, 02:06:29 am »
@graybeard

IIRC it is possible to use custom cal kit in the VNA mode of the SVA - for a competent unix user.

The cal kit definition is stored in a file on the file system, and could be backed up and modified to suit another cal kit.

Also IIRC the definitions are stored in a file as mag/phase data, so any standard which one has measurement data for can be used as a cal standard.
IMHO this is a more comprehensive method than using the traditional Cx/Lx model which is what I think you are proposing. I do agree Siglent should implement custom cal kits in the UI.

The gain and phase information is the best method, especially at much higher frequencies where a lumped model is inadequate.  However in the frequency range of the SVA1015x lumped models work well.
 


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