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If you purchased a RIGOL PLA2216, how many test leads and grabbers did you get?

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pcprogrammer:

--- Quote from: TomKatt on June 18, 2024, 06:12:49 pm ---
--- Quote from: pcprogrammer on June 18, 2024, 05:06:09 pm ---
--- Quote from: TomKatt on June 18, 2024, 03:53:45 pm ---I must be misunderstanding something here - why would any expect more leads than there are channels?  For a 16 channel LA, I'd expect 16 leads + 16 grounds.

--- End quote ---

16 + 16 = 32. See my previous post, signal and ground leads are the same.

--- End quote ---
But now they've reduced that to 20 leads that are intended to provide both signal and ground connections?  So if you need to monitor 16 channel logic, not every channel has a ground?  I guess some logic inputs can share a ground, but it certainly feels offputting.

--- End quote ---

You don't need that many grounds when scoping a data bus or SPI, etc. A single ground will do.

The probe does have a ground pin for each signal pin, and with all the leads present it is possible to connect ground for every single one of them, but it won't reduce on noise that much since the leads are reasonably long and not twisted.

Take a look at a picture of the probe and you can see for yourself. https://rigolshop.eu/accessories/probe/mso5000/pla2216.html

lunix:

--- Quote ---You don't need that many grounds when scoping a data bus or SPI, etc. A single ground will do.

The probe does have a ground pin for each signal pin, and with all the leads present it is possible to connect ground for every single one of them, but it won't reduce on noise that much since the leads are reasonably long and not twisted.

--- End quote ---

Rigol recommends twisting a ground and a signal lead for high speed signals.  That's why there's a ground connection for each of the 16 channels.  Hence, 20 leads is inadequate.  Since the PLA2216 is also inadequate, it's moot.

The DSLogic U3Pro32 has a ground (and grabbers) for each signal channel (all 32 of 'em).  They are likewise not all needed for most jobs.  I regret ever purchasing the PLA2216.  And I never use it.  The DSView software is amazing, too.  And all of the protocol analyzers work (and there are something like 50).

TomKatt:

--- Quote from: lunix on July 01, 2024, 05:53:09 am ---
--- Quote ---You don't need that many grounds when scoping a data bus or SPI, etc. A single ground will do.

The probe does have a ground pin for each signal pin, and with all the leads present it is possible to connect ground for every single one of them, but it won't reduce on noise that much since the leads are reasonably long and not twisted.

--- End quote ---

Rigol recommends twisting a ground and a signal lead for high speed signals.  That's why there's a ground connection for each of the 16 channels.  Hence, 20 leads is inadequate.  Since the PLA2216 is also inadequate, it's moot.

The DSLogic U3Pro32 has a ground (and grabbers) for each signal channel (all 32 of 'em).  They are likewise not all needed for most jobs.  I regret ever purchasing the PLA2216.  And I never use it.  The DSView software is amazing, too.  And all of the protocol analyzers work (and there are something like 50).

--- End quote ---
I'm just a simple hobbyist, so while I don't appreciate the benefit of the digital channel options on entry level MSO's such as these models given the limitations of screen size, decoder options and general GUI features, I'm sure there are cases where you need to align an analog signal with a digital signal on the same screen...  For the few time's I've needed to do something like that, the digital signal has been the trigger - and I can use the trigger out on the DSlogic Plus to trigger the scope.  Granted, you end up with information on 2 screens and no time alignment between the two, but I used cursors to calculate the timing between the two devices.

But for general use I'd use the analog channels on the scope for decoding rather than trying to stuff all that information into a small screen.

Back to topic, as mentioned the DSlogic Plus includes test clips for every signal and ground - if you don't need them, fine.  But if you do - why not include them?

lunix:

--- Quote from: TomKatt on July 01, 2024, 11:00:08 am ---But for general use I'd use the analog channels on the scope for decoding rather than trying to stuff all that information into a small screen.

Back to topic, as mentioned the DSlogic Plus includes test clips for every signal and ground - if you don't need them, fine.  But if you do - why not include them?

--- End quote ---

If you are fooled into buying a Rigol, you can use the web interface, and/or the HDMI to have an 85" screen, if you want.  I use the webserver capability, and [HDMI + USB] for a 10.1" touchscreen.  I was once a simple hobbyist, too.  We all have to start somewhere.

I believe Siglent has the same facilities for using larger screens on your DSO.

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