BitScope Mini

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Tom WA3KLR:
Here's a cheap small stand-alone 5 MHz digital scope - 5 MHz, 20 MS, 40 k memory , about $47.  Available from Amazon and ebay also.  I don't have one.

https://www.banggood.com/DANIU-ADS2050H-ADS2031H-Handheld-Oscilloscope-High-Precision-5MHz-Bandwidth-20M-Sampling-Rate-2_4-Inch-LCD-Screen-One-Key-Auto-Built-in-Lithium-Battery-p-1426883.html?rmmds=category&ID=6268971&cur_warehouse=USA

Steve - K4HX:
What is the resolution bandwidth on your analog SA? How does it compare to the SDR?



Quote from: KA3EKH on August 05, 2020, 09:28:18 PM

The last ten years I have been only using digital scopes and spectrum analyzers, biggest complain I have with a lot of the Tektronix scopes is that you have to do things like use the driving audio source as an external trigger when looking at things like AM modulation. Without a good external trigger source the A to D converters get wonky displaying complex waveforms, looking at sine, square and digital pulses is all good but modulated RF can be tricky. The old vacuum tube bottles never had that issue but today digital is the “state of the art”.
The other thing I just can’t seam to wrap my head around is why when I look at AM and sideband signals on a SDR they appear so much cleaner then a spectrum analyzers? I can do things like look at occupied bandwidth for a AM broadcast station on a SDR and clearly see the effects or fall off of the NRSC filter as a sharp drop that looks like what it supposed to but never such a clean trace on a regular spectrum analyzer. I have a HP ESA-1500 that’s clean but still don’t display things like two tone SSB signals as well as a Flex.

KA3EKH:
The resolution Bandwidth is adjustable from 3.0 MHz down to 1.0 KHz, Video Bandwidth can be set to anywhere between 3.0 MHz down to 1.0 Hz with the ratio being any number you want. It’s all menu driven.
I use it all the time at work to check occupied bandwidth, spurious and things like that and it’s a great box but when I bring it back into the shop and use it for looking at the outputs of SSB transmitters just cannot get it to do as nice an image as the Flex box shows.

Steve - K4HX:
Is any averaging involved in either box? Same for windowing?

What is the number of points displayed by both boxes? Many of the older SAs measured more points than they displayed. Points were combined/averaged.

M0VRF:
For $360 you can get a decent 200MHz 'Scope from Siglent, they're small and can hang from an upper shelf so take very little room. I gave up using old clunky Tek stuff ages ago way too big.

JB.

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