Products > Test Equipment
Choosing an oscilloscope
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rf-loop:

--- Quote from: nctnico on October 11, 2020, 01:08:59 pm ---
--- Quote from: David Hess on October 11, 2020, 12:39:18 am ---
--- Quote from: mawyatt on October 08, 2020, 07:21:52 pm ---Also I recall Tek had some scopes that used Charge Coupled Chips (CCDs) called Bucket Brigade Devices which sequentially captured the analog signal, and not used as an imager. The CCD chip would be read out at a slower rate and digitized with a slower ADC. Good for capturing short period single or infrequent events like fast glitches.
--- End quote ---

I have one and they work exactly as you describe.  Tektronix made CCD based DSOs for a long time where maximum sample rate on all channels simultaneously was desired and they were more than competitive with ADC and SRAM based DSOs.

The Tektronix TDS600 series were all CCD based and peaked at 3 GHz bandwidth, 10 GS/s, 120k sample record length, and 100 ps peak detection.

--- End quote ---
IIRC the Tektronix TDS600 series don't have peak detect and no such long records. This series is made for single shot acquisitions at maximium samplerate which makes them pretty limited for general purpose use.

--- End quote ---

And due to trumpeths aka alternative truths, fact check:  TDS694C have 500 - 30k record length and Optionally  120k.
ledtester:

--- Quote from: PurpleAmaranth on October 02, 2020, 11:13:39 pm ---Hello,

I'm new to the forum (and to electronics in general), ...

... Idk much about this stuff, but I am going into electrical engineering, so I figure I'll learn a lot more as the years go by!

Thanks!

--- End quote ---

For a beginner I would suggest getting an Analog Discovery. If you're patient you can pick up the original one (the Analog Discovery 1 or what Digilent calls the "Legacy") on ebay for around $100 + $25 for the BNC adaptor.

You'll get a dual channel 20+ Mhz scope, analog waveform and digital pattern generator, 16 channels of digital I/O and a 16-channel logic analyzer.

But the real value is the software which coordinates all of these functional units together to create various lab instruments. You can also write your own control programs in Python and I believe Javascript.

And there's a fair amount of tutorials, courseware and lab exercises you can find online.

And, of course, it doesn't take up a lot of desk space.
nctnico:

--- Quote from: rf-loop on October 11, 2020, 01:34:06 pm ---
--- Quote from: nctnico on October 11, 2020, 01:08:59 pm ---
--- Quote from: David Hess on October 11, 2020, 12:39:18 am ---
--- Quote from: mawyatt on October 08, 2020, 07:21:52 pm ---Also I recall Tek had some scopes that used Charge Coupled Chips (CCDs) called Bucket Brigade Devices which sequentially captured the analog signal, and not used as an imager. The CCD chip would be read out at a slower rate and digitized with a slower ADC. Good for capturing short period single or infrequent events like fast glitches.
--- End quote ---

I have one and they work exactly as you describe.  Tektronix made CCD based DSOs for a long time where maximum sample rate on all channels simultaneously was desired and they were more than competitive with ADC and SRAM based DSOs.

The Tektronix TDS600 series were all CCD based and peaked at 3 GHz bandwidth, 10 GS/s, 120k sample record length, and 100 ps peak detection.

--- End quote ---
IIRC the Tektronix TDS600 series don't have peak detect and no such long records. This series is made for single shot acquisitions at maximium samplerate which makes them pretty limited for general purpose use.

--- End quote ---

And due to trumpeths aka alternative truths, fact check:  TDS694C have 500 - 30k record length and Optionally  120k.

--- End quote ---

OTOH the TDS644A only has 2000 points per channel and no peak detect. The higher end models (TDS684C) top out at 15kpts and still no peak detect. The bottom line is: from the TDS500, TDS600 and TDS700 series the TDS600 is by far the worst choice for use as a general purpose oscilloscope.
rsjsouza:

--- Quote from: ledtester on October 11, 2020, 02:26:40 pm ---
--- Quote from: PurpleAmaranth on October 02, 2020, 11:13:39 pm ---Hello,

I'm new to the forum (and to electronics in general), ...

... Idk much about this stuff, but I am going into electrical engineering, so I figure I'll learn a lot more as the years go by!

Thanks!

--- End quote ---

For a beginner I would suggest getting an Analog Discovery. If you're patient you can pick up the original one (the Analog Discovery 1 or what Digilent calls the "Legacy") on ebay for around $100 + $25 for the BNC adaptor.
--- End quote ---
If you are located in the US, there are two Analog Discovery kits for sale on Offerup (their supply was drained for several months, thus these may be good alternatives).
bdunham7:
 
--- Quote from: nctnico on October 11, 2020, 05:08:13 pm ---OTOH the TDS644A only has 2000 points per channel and no peak detect. The higher end models (TDS684C) top out at 15kpts and still no peak detect. The bottom line is: from the TDS500, TDS600 and TDS700 series the TDS600 is by far the worst choice for use as a general purpose oscilloscope.

--- End quote ---

I haven't had one so I can't say whether they are a bad choice or not, but the specs David posted for the best model,  as expected, appear to be accurate--including peak detect.

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