Products > Test Equipment
Yet Another "Which Oscilloscope" thread (though slightly different, I promise)
tautech:
--- Quote from: Agouti on February 16, 2024, 04:17:31 pm ---
tautech: Agreed on waiting for those to come out, especially if there's any chance they could also push the price of the previous generation down a bit. I'm also not adverse to buying second-hand, most of my nice tools came pre-loved, and I would think a new shiny generation would cause help populate the for-sale sections.
--- End quote ---
They already have however like here in NZ the AU market is not large and when existing model stock is depleted the new 800X HD models will/should be of greater interest to stock than the older X-E's even at the reduced factory pricing.
I don't believe the 100 MHz SDS1104X-E even at discounted pricing will challenge the new 70 MHz SDS804X HD pricing and while I have yet to test the 70 MHz model I have a feeling it could challenge the 100 MHz X-E.
I base this on the recognised ~120 MHz BW of 100 MHz 4ch X-E vs my tests on SDS814X HD returning ~150 MHz.
DaneLaw:
I dont know how it is with the new joystick series (STO1000) but with the older STO½000C/E that had knobs - you can use power banks to your heart's desire with an appropriate PD cable..
That's how I use mine, I never use AC or its noisy incl. power brick..got 3 of these 28.000mah powerbanks below. (fitted with 8x 18650 cells.) I tend to use a 12v Power delivery cable DC to TypeC https://www.aliexpress.com/item/1005006018729093.html?
Any power bank with Power Delivery protocol that supports 12V PD and can deliver enough wattage will work, or just an AC power supply to fx your 20v laptop with (PD) power delivery-protocol will also work, as they usually have support for the lower power-delivery protocols like 15V, 12V and 9v .. - that is the exact PD-voltage you're activating with a PD trigger handshake in the cable above.
or I use the adjustable DC barrel out on these power banks - that goes from 3v to 24.4v at max 5A with a DC-barrel to DC-barrel cable, and I just dial in the voltage I need, but the power delivery trigger cables are preferred, as its plug & play, and I can use many other power banks.
Micsig STO1104C consumes around 25W to 30Watt, so a tad over 2A at 12V.....I do love the portability & freedom I get with a hybrid solution like Micsig units, - something that is critical for me, and other Hybrid alternatives like Tek2 are too much for my wallet.
The 3dB was around 135 to 140Mhz if I remember correctly (STO1104C) while the peak-update rate was 95k to 100k.. one feature that surprised me in usefullness, and I often fiddle with, is bandwidth filters.
While some of the biggest weaknesses in these lower-end hybrid Micsig scopes, is the lack of statistics, not to mention a lackluster support, but here +4 years down the line, I gotta admit I do like my STO1104C a lot...
its hybrid nature (bench+portable) fits my use-case ideally, the non-tethered aspect is a joy, having all my relevant gear in the optimized bag.
csuhi17:
As far as I know, all Micsig scopes are Android.
Except for the older series, TO is Linux based as far as I know.
I tested my STO2002c scope without a battery, using an external 12V power supply and it worked without any problems.
Micsig is well done, the only problem I have with them is that they don't include a few basic functions. Mine has no histogram, pass/fail, etc.
Which would be good for me. and I see no chance that he will ever know.
I see that the newer editions bind them more than if they improve the old ones as well.
The only difference between VTO and VATO is that half of VATO's probes are automotive probes with banana plugs, and the Android program is also different if I understand correctly, VTO does not contain automotive measurements.
And there is only an Android application for VTO, VATO.
It must be emulated for Windows.
If I understood correctly.
Agouti:
Well, I've found the reason how Pico justify £2,000 for a 25MHz 4 channel 'scope - they lock some pretty useful functions in the software to them. The big one for me, that I can't seem to find anywhere else, is graphing peak to peak frequency for a square wave. It's really useful in identifying misfires (by graphing RPM during each cylinder compression/power stroke) and for things like MAF sensors which are usually frequency modulated these days.
I remember hearing a few years ago about hacks to get the Automotive software to work with the base picoscopes, but I'm not sure if I want to go down that route. Is there no AUD$1k or under oscilloscope that can do FM graphing?
I suppose another option would be using the python API for a USB scope software package, or even trying to shoe-horn it into OpenHantek or one of the OpenOwon packages, but that feels a bit unachievable for me at the moment.
Performa01:
--- Quote from: Agouti on February 21, 2024, 06:38:06 am ---Is there no AUD$1k or under oscilloscope that can do FM graphing?
--- End quote ---
Yes there is, even well within your price range. The 12 bit Siglent SDS800X HD (2 or 4 channel versions up to 200 MHz, available by the end of February) have high sample rates, deep memory and proper analysis capabilities, including track- and trend-plots for measurements.
You can use a track plot for the automatic frequency measurement to do FM demodulation on various waveforms. Here's two examples (dont get distracted by the weird axis labelling from the autoscaling - I was just too lazy to set up the axes manually):
500 Hz square wave, frequency modulated at 10 Hz with +/-300 Hz deviation
SDS824X_HD_Measure_Track_500Hz_FM_10Hz
5 kHz square wave, frequency modulated at 100 Hz with +/-300 Hz deviation
SDS824X_HD_Measure_Track_5kHz_FM_100Hz
Btw, for catching misfires in a combustion engine, the hardware accelerated full-speed mask test could be even more useful.
Detailed information about these instruments can be found here:
https://www.eevblog.com/forum/testgear/sds800x-hd-review-demonstration-thread/
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