I recently got myself a new toy...

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rigmo
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Re: I recently got myself a new toy...

Post by rigmo » Tue May 12, 2020 11:16 pm

Cheap spectrum analyzer with tracking generator solution...


https://aliexpress.com/item/32808842510.html

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Re: I recently got myself a new toy...

Post by nrgkits.nz » Wed May 13, 2020 12:38 pm


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Re: I recently got myself a new toy...

Post by BriansBrain » Wed May 13, 2020 2:10 pm

nrgkits.nz wrote:
Wed May 13, 2020 12:38 pm
There’s a nice one here too: https://www.rohde-schwarz.com/us/produc ... 11793.html
Nice price as well :whistle
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Re: I recently got myself a new toy...

Post by rigmo » Wed May 13, 2020 9:06 pm


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Re: I recently got myself a new toy...

Post by rigmo » Wed May 13, 2020 9:55 pm

nrgkits.nz wrote:
Wed May 13, 2020 12:38 pm
There’s a nice one here too: https://www.rohde-schwarz.com/us/produc ... 11793.html
Basically we do not need this believe me! im sure 100%
With this one we can make 99.9% what we need ever for FM RF hi Hobby professional even PIRATE ;)
https://aliexpress.com/item/32808842510.html

Best Regards

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Re: I recently got myself a new toy...

Post by Bton-FM » Wed May 13, 2020 10:37 pm

You can find old models of spectrum analysers made by HP for cheap, some even go to 18Ghz...

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Re: I recently got myself a new toy...

Post by rigmo » Wed May 13, 2020 10:52 pm

Bton-FM wrote:
Wed May 13, 2020 10:37 pm
You can find old models of spectrum analysers made by HP for cheap, some even go to 18Ghz...
yes sure..
example I lake analogue..
https://nl.aliexpress.com/item/32969066768.html
The analogue
1_Spectrum-analyzer-1-GHz-RF-signaal-analyzer-signaal-analyzer-sm-5010-sm-5011.jpg
is nice because you see the signal instantaneously and it's not slow to draw the screen like on digital (slowness)
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Re: I recently got myself a new toy...

Post by thewisepranker » Thu May 14, 2020 12:23 am

rigmo wrote:
Wed May 13, 2020 10:52 pm
you see the signal instantaneously and it's not slow to draw the screen like on digital (slowness)
That's completely false - it's almost as if you've confused spectrum analysers for time-domain devices like oscilloscopes. You're probably referring to screen refresh rate and graphics update rate but that's only true of the really cheap models of yesteryear. Even the likes of Rigol and Siglent are getting it right nowadays. I'm seriously considering swapping some of my old heavy gear for newer digital gear, apart from the clunky EMC stuff where I need the dynamic range.

The draw time, or sweep time, is predominantly a function of the resolution bandwidth and the span, any analogue or digital circuitry on top of that is for any real-life use cases, absolutely insignificant. The functionality you gain by using a more comprehensive spectrum analyser like the ones I discuss below far outweighs any delay that you can't even perceive, even at the highest resolution bandwidth settings. Can you even change RBW on that one?

The sweep time for a traditional "analogue" spectrum analyser is approximately the span divided by the RBW squared, all multiplied by a K factor which is typically something above 1 and up to around 3. For a digital analyser the settling time can be known, and corrected for (predicted) and reduced to 1, so the sweep time is actually lower for a digital analyser when compared to an "oldskool" analogue spectrum analyser.

My Anritsu MS2601 has a sweep time comparable to a friends' Hameg (a rebrand of the Meili SM-50xx you posted), all of the five HP 8593s and the pretty slick and new Keysight N9000 they've got at work, given the same RBW and span settings. The Keysight is faster by a bit, how noticeable it is depends on the settings. At low RBW and high span, it completes a span much faster than any of the others. In fact, the N9000 can do all of it faster, with a massively lower noise floor, with probably at least 20 times more sampling points when compared to the same time it takes my Anritsu and any of the HPs to do the same job, let alone the Miele/Hameg/Atten ones.

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Re: I recently got myself a new toy...

Post by rigmo » Thu May 14, 2020 3:34 pm

thank you very much, best regards

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Re: I recently got myself a new toy...

Post by Marcel » Fri May 15, 2020 7:21 am

Bton-FM

1.5 MM wire (approx) 15 AWG

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Re: RE: Re: RE: Re: I recently got myself a new toy...

Post by Electronically » Fri May 15, 2020 7:35 am

Bton-FM wrote:
Electronically wrote:
Tue May 12, 2020 4:49 pm
Bton-FM wrote: what gauge wire do you use on your filters?
18swg

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Thankyou :)
Oops meant to say 16swg

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Re: RE: Re: I recently got myself a new toy...

Post by Electronically » Fri May 15, 2020 7:36 am

Marcel wrote:Bton-FM

1.5 MM wire (approx) 15 AWG
16 swg Marcel close enough

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Re: I recently got myself a new toy...

Post by rigmo » Sat May 23, 2020 7:43 am

fm-rf tools

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Re: I recently got myself a new toy...

Post by rigmo » Sat May 23, 2020 7:55 am


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Re: I recently got myself a new toy...

Post by BriansBrain » Sat May 23, 2020 11:14 am

I have one :whistle
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