Products > Test Equipment

Which logic analyzer for FPGA work up to 300-400 Mhz

<< < (5/11) > >>

mtk:

--- Quote from: markone on January 07, 2023, 01:12:48 pm ---
--- Quote from: mtk on January 07, 2023, 11:58:33 am ---DSLogic Analyzers have stage trigger supporting 16 stages of trigger flag. Each stage support logic operation (and/or) of 2 sets of trigger. Each set support edge/level trigger of all channels, invert and counter. There is also serial trigger - https://www.dreamsourcelab.com/doc/DSView_User_Guide.pdf. It does not look much convenient to set up, but it seems possible to filter the requested from you values ?

--- End quote ---

Serial trigger does not work at all with async serial and it's a huge pita to setup with I2C and SPI, stay away this thing if serial decoding is your job.

--- End quote ---

Mine is in transit and can not test it right now. Have you tried submitting a support request via Github - https://github.com/DreamSourceLab/DSView/issues ?

tggzzz:

--- Quote from: markone on January 07, 2023, 01:12:48 pm ---
--- Quote from: mtk on January 07, 2023, 11:58:33 am ---DSLogic Analyzers have stage trigger supporting 16 stages of trigger flag. Each stage support logic operation (and/or) of 2 sets of trigger. Each set support edge/level trigger of all channels, invert and counter. There is also serial trigger - https://www.dreamsourcelab.com/doc/DSView_User_Guide.pdf. It does not look much convenient to set up, but it seems possible to filter the requested from you values ?

--- End quote ---

Serial trigger does not work at all with async serial and it's a huge pita to setup with I2C and SPI, stay away this thing if serial decoding is your job.

--- End quote ---

Arguably a protocol analyser can be more appropriate for such things.

tggzzz:

--- Quote from: Thomas on January 07, 2023, 11:29:39 am ---
--- Quote from: markone on January 07, 2023, 09:50:41 am ---I was not aware of this device, it looks quite capable for the price, does its windows application show captured data in real time fashion or you have to wait the end of recording phase ?

--- End quote ---
It operates in the normal capture-process-display manner, with "Auto Run" or "Run Once" options on separate buttons. This can be fast or slow depending on sample speed, memory depth, number of signals and decoders, see under Performance section here:
https://tech-tools.com/digiview-sw.html

--- End quote ---

I think all tools will have that cycle to a greater or lesser extent, depending on what is meant by "process". The devil is in the details; manufacturers sometimes make it difficult to understand, and users don't always understand what they will actually need.

For some use-cases involving rare fast short-duration events, a lot of the "processing" has to be done before and during capture and display. If not then the rare event can be missed while captured buffers are being post-processed to see if something "interesting" occurred.

Thomas:

--- Quote from: nctnico on January 07, 2023, 12:55:50 pm ---This looks like a neat tool but what I'm missing from the specification are the input capacitance & impedance. And the capture buffer is quite small. 128Mbit in total (14Mbit per channel for the 9 bit version and 7Mbit/channel for the 18 bit version).

--- End quote ---

Yes, the capture buffer is quite small. But as with many USB logic analyzers, only transitions are stored (often referred to as compression). They claim 100M transitions can be captured in most cases. This can be tested here:
https://tech-tools.com/captures.html

But still - YMMV.
One should always consider data sheets and specs carefully.
Corner cases and unlucky circumstances are always lurking and waiting to ruin your day.

In this regard I think the boat anchors are a safer bet - I think they have fewer "hidden" limitations and surprises.
But then again - the DigiView is a lot smaller than the floppy drive of a boat anchor :)

nctnico:

--- Quote from: Thomas on January 07, 2023, 08:03:07 pm ---
--- Quote from: nctnico on January 07, 2023, 12:55:50 pm ---This looks like a neat tool but what I'm missing from the specification are the input capacitance & impedance. And the capture buffer is quite small. 128Mbit in total (14Mbit per channel for the 9 bit version and 7Mbit/channel for the 18 bit version).

--- End quote ---

Yes, the capture buffer is quite small. But as with many USB logic analyzers, only transitions are stored (often referred to as compression). They claim 100M transitions can be captured in most cases. This can be tested here:
https://tech-tools.com/captures.html

But still - YMMV.
One should always consider data sheets and specs carefully.
Corner cases and unlucky circumstances are always lurking and waiting to ruin your day.

In this regard I think the boat anchors are a safer bet - I think they have fewer "hidden" limitations and surprises.
But then again - the DigiView is a lot smaller than the floppy drive of a boat anchor :)

--- End quote ---
Yes and no. Typically I'd agree a boat anchor takes a lot of space and is a PITA to haul around the lab but the Tektronix TLA700 series is an exception. My TLA715 sits high up a shelve and I control it remotely from my PC. The probe cables are long enough to reach the desk below so basically I only have a few probe pods on my desk when using the logic analyser.

Navigation

[0] Message Index

[#] Next page

[*] Previous page

There was an error while thanking
Thanking...
Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod