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| Suggestions for a good second-hand LA? |
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| alm:
In my opinion the main advantage of integration between a scope and a logic analyzer is to see both signals simultaneously on the same time base. The HP/Agilent logic analyzers with their contemporary scopes had a feature where the scope and analyzer's timebases were synchronized so time relationships between the digital and analog signals would be maintained, and you could for example see the relationship between a glitch in an analog signal on the scope and a specific pattern on the digital bus. Before that some analyzers had optional internal DSO channels that would sample on the same timebase as the digital channels, but the scopes were pretty anemic in terms of memory depth. I would imagine the Tektronix tool did something similar, but it will generally only be supported with scopes from the same manufacturer and time frame. |
| RomDump:
--- Quote from: mbalmer on September 15, 2022, 06:47:22 pm ---Doesn't that functionality require a compatible scope? I remember reading that there were certain scopes that were "supported" but I don't own one (I have a TDS 460, which isn't on their list). I'm guessing this is a BNC output on the LA that goes to an input on the scope. --- End quote --- --- Quote from: nctnico on September 15, 2022, 06:57:45 pm ---There is some software / hardware tool to support cross-triggering between Tektronix scopes and their logic analysers. But I don't really see the need for that. --- End quote --- --- Quote from: alm on September 15, 2022, 09:09:25 pm ---In my opinion the main advantage of integration between a scope and a logic analyzer is to see both signals simultaneously on the same time base. I would imagine the Tektronix tool did something similar, but it will generally only be supported with scopes from the same manufacturer and time frame. --- End quote --- The product Tektronix called Iview, (I beleive it is already built in to the TLA 4.3 and up software). Basically with a compatible Tektronix scope, a NI GPIB-USB-B(or HS) cable and some BNC cables you can see a correlation between analog signal and digital signals. As ALM mentioned, one use would be to see glitches. You don't need a TLA7AA4 with analog inputs but it is helpful as you can automatically route the digital line you want to see. With the older modules you had to do double probing (one probe from the oscilloscope and one digital line from the logic analyzer) which would introduce additional signal integrity issues. |
| mbalmer:
So after playing around with the TLA, the one thing I've noticed is that since it runs Win2K out of the box, it doesn't have remote desktop functionality built in. Everything I've read says that an upgrade to Windows XP is required to do that. However, I'm running into a problem. The BIOS version is 1.00.00, and supposedly, there's a 1.00.02 version that it may or may not need to be updated to to make it possible to upgrade it to XP. My issue there is that there's no way to use a floppy to boot the system since it doesn't seem to like floppies formatted using Windows 98 -- and Win2K can't create boot floppies that aren't intended as a means to eventually install Win2K. I haven't tried formatting the disk from a running XP machine, but that's next on my list. My question is, is there a disk image that I can boot from that includes the BIOS file? TiN seems to have the files on the xdevs website, but even he mentions that you have to make a bootable floppy to use them. I've tried using a Windows XP install disk directly, and the system appears to hang at the "Setup is starting Windows" segment in text mode (when it changes from an 80x25 to an 80x30(?) screen). My guess is that the installer is still running, but the video system doesn't know how to handle the oddball text mode. Has anyone else had that happen? In the probes department, I'm still trying to figure out an answer. I've got four sets of probes now, and new elastomers on their way, so hopefully I'll have something workable here soon, but it doesn't look like anyone has a KiCad library for the probe footprint just yet. The help all of you have given me so far has been invaluable and I'm overall much happier with the Tek device, assuming I can get the probes and remote control thing sorted out. |
| nctnico:
You don't need remote desktop. Install the logic analyser application on your regular PC and start the remote control server on the logic analyser. Remote control isn't remote desktop but SCPI / GPIB like over LAN. Don't upgrade the LA to XP because the hardware drivers won't work with XP. |
| RomDump:
--- Quote from: nctnico on September 20, 2022, 09:01:14 pm ---Don't upgrade the LA to XP because the hardware drivers won't work with XP. --- End quote --- What hardware drivers are specifically missing? First time I am hearing of this. |
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