Lecroy simulation mode - Page 1
Forum section: electronics / testgear

author: darkstar49
author_rank: Frequent Contributor
timestamp: June 27, 2021, 03:13:25 pm
content: I know this sounds stupid, as already addressed (I think...).Got a sick WaveRunner 6050A, that is in simulation mode (i.e. it shows predefined waveforms for each channel).I've checked in the service menu, but couldn't find the place where this can be deactivated... can anyone help ?I also have strange messages here and there that the WaveRunner driver is not supported and/or that some functions s are only available for WaveRunners...

author: tv84
author_rank: Super Contributor
timestamp: June 27, 2021, 03:22:00 pm
content: Clearing all options?Maybe someone has bitten off more than they can chew...Quote from: darkstar49 on June 27, 2021, 03:13:25 pmBut that is a Waverunner, right?

author: darkstar49
author_rank: Frequent Contributor
timestamp: June 27, 2021, 04:23:20 pm
content: it has no options at all... only the hidden 'MBW' option for the 500MHz.From earlier posts, I think to recall there was something somewhere in the service menus, but can't remember what/where...It's just frustrating because I know I saw this a few years backI'll start analyzing the logs, too... but I recall clearing the sim mode made the error(s) pop up.

author: darkstar49
author_rank: Frequent Contributor
timestamp: June 27, 2021, 04:24:29 pm
content: Quote from: tv84 on June 27, 2021, 03:22:00 pmyep...

author: nctnico
author_rank: Super Contributor
timestamp: June 27, 2021, 05:30:20 pm
content: Check if the acquisition board is being recognised by the system. You might want to open the scope and reseat the board.

author: darkstar49
author_rank: Frequent Contributor
timestamp: June 27, 2021, 07:46:49 pm
content: Quote from: nctnico on June 27, 2021, 05:30:20 pmIt’s a scope I bought quite a while ago, it was in a drawer since… it had a MAM phase error (I guess some PLL related issue on the acq board). So the acq board actually talks to the interface board, but it is non functional, this is exactly the kind of situation where the simulation mode gets activated… and no more errors are reported upon startup, that’s why I’d like to know how to de-activate it…I know I managed to do it once, but no damn way to recall how…

author: Mechatrommer
author_rank: Super Contributor
timestamp: June 27, 2021, 07:57:13 pm
content: iirc the last time guy got this issue because of damaged power rail to the frontend module and got it fixed. iirc in lecroy hack thread, and no one came up with how to deactivate it from SW. i guess it will go automatic once the SW cant detect the frontend presence. and i figured later the used lecroy dso i bought, its main 10GHz didnt locked when i did the probing on the main clock unit, but acquiring data just fine, not sure if its realted to your MAM phase error issue. ymmv.

author: DaJMasta
author_rank: Super Contributor
timestamp: June 27, 2021, 08:09:45 pm
content: What is the 'simulated' waveforms?I've got a WP7200 who's acquisition board manager FPGA doesn't complete initialization (reads data from PROM but never starts), and each channel displays a different waveform (sine, square, triangle, something else), but these are not simulated, they are actually measured. At least for the scope I've got, this is an internal test signal loopback kind of thing, that is what's defaulted to when the ADCs can boot up fine but the mainboard (and thus control of the frontends) doesn't.

author: darkstar49
author_rank: Frequent Contributor
timestamp: June 28, 2021, 02:07:56 am
content: Quote from: DaJMasta on June 27, 2021, 08:09:45 pmDifferent issue, but same symptom… yes, the signals are ‘real’ in a sense… but this ‘simulation’ can be disabled somehow… it’s just a mode the scope gets into if the acq board is not able to acquire from the FE for any reason, so this ‘masks’ in fact the problem. the acq board is instructed to go into that mode, from the scope software’s perspective, they’re indeed real signals… it’s a a siggen built into the acq board.But again, there’s 100% a way to force this off.

author: ollopa
author_rank: Regular Contributor
timestamp: June 28, 2021, 08:39:17 am
content: In my experience, the simulated signals are purely software generated and have nothing to do with the physical hardware. They don't actually travel over any hardware busses and only exist to feed data into the signal processing modules.It has been ages but I think you want to un-check this box here:

author: darkstar49
author_rank: Frequent Contributor
timestamp: June 28, 2021, 06:51:00 pm
content: Quote from: ollopa on June 28, 2021, 08:39:17 amI knew I’d seen this… ;-)Thanks a lot !!!Just got to find out what service mode brings this menu… I don’t have it… did you have DEV installed ? Or is it some alternate service mode (factory,…) ?