EEVblog Electronics Community Forum

Products => Test Equipment => Topic started by: whitnasty1 on September 03, 2013, 02:03:31 am

Title: Which Logic Analyzer to Buy?? (1650a or Logic Sniffer?)
Post by: whitnasty1 on September 03, 2013, 02:03:31 am

Question answered. Thanks.

Title: Re: Which Logic Analyzer to Buy?? (1650a or Logic Sniffer?)
Post by: marshallh on September 03, 2013, 03:09:17 am

You mention you're building a relatively modern digital system and you don't know what you need to stick an LA on?
If you wanted to debug any one of those subsystems you'd be looking at tens of thousands of $$$...
And then design the PCB so that you can actually tap lines without crashing anything.

Are you debugging 64bit 500mhz source synchronous busses? or just SPI and i2c? That complete changes things.

High speed serdes-based protocols like PCIe, SATA, USB et al are not things you can put a traditional logic analyzer on... you will need a dedicated analyzer for that protocol, or a 5ghz bandwidth scope with protocol decoding ($$$$$$).

I would pick the HP over the open sores sniffer.. but that said, both are pretty crap.
Look up the Intronix Logicport.

It seems like you don't know what you need, so before you go buy stuff, do simple things like sticking a serial console on there with printf's or something like that.

Title: Re: Which Logic Analyzer to Buy?? (1650a or Logic Sniffer?)
Post by: c4757p on September 03, 2013, 03:16:05 am

Quote from: whitnasty1 on September 03, 2013, 02:03:31 am

It is an Intel Core2Duo system, GS45 memory controller, Spartan-6 FPGA, PCI-E, SATA, USB

Quote

Option 1 : Hewlett Packard 1650a Logic Analyzer (USED- eBay)
...
Option 2 : USB Open Logic Sniffer from Dangerous Prototypes (Sparkfun)

Either this is a joke, or you've bitten off way more than you can chew. Best to spit it out...

Title: Re: Which Logic Analyzer to Buy?? (1650a or Logic Sniffer?)
Post by: echen1024 on September 03, 2013, 03:29:52 am

Eh. 3GHz+. Sort of bitten off more than you can chew. But if you're devoting time to this type of project, a new Agilent 68 channel LA might be the way to go.

Title: Re: Which Logic Analyzer to Buy?? (1650a or Logic Sniffer?)
Post by: Skimask on September 03, 2013, 03:34:48 am

 :-DD :-DD :-DD
http://forum.grasscity.com/bongs-bubblers-water-pipes/1215775-can-i-use-smaller-downstem-45-instead-475.html (http://forum.grasscity.com/bongs-bubblers-water-pipes/1215775-can-i-use-smaller-downstem-45-instead-475.html)

Title: Re: Which Logic Analyzer to Buy?? (1650a or Logic Sniffer?)
Post by: JuanPC on September 03, 2013, 03:37:22 am

http://www.ebay.com/sch/i.html?_trksid=p2047675.m570.l1313.TR0.TRC0&_nkw=Instek+GLA&_sacat=0&_from=R40 (http://www.ebay.com/sch/i.html?_trksid=p2047675.m570.l1313.TR0.TRC0&_nkw=Instek+GLA&_sacat=0&_from=R40)

http://www.tequipment.net/InstekGLA-1132.html (http://www.tequipment.net/InstekGLA-1132.html)
http://www.tequipment.net/JanatekLA-GOLD-36.html (http://www.tequipment.net/JanatekLA-GOLD-36.html)
http://www.tequipment.net/LinkInstrumentsLA-55160.html (http://www.tequipment.net/LinkInstrumentsLA-55160.html)

or a Mixed Signal Oscilloscope.

Title: Re: Which Logic Analyzer to Buy?? (1650a or Logic Sniffer?)
Post by: synapsis on September 03, 2013, 04:06:37 am

I have an HP 1663A that I'll sell for $200 + shipping (what I paid for it.) 500Mhz/250Mhz 16/32 channel timing or 100 Mhz 32 channel state.

Everything works. Took it apart and cleaned it. Also have PDFs of all the manuals.