I recently found a used Iwatsu / Lecroy (also known as Wuerstchenscope's) LT354.
It seemed to have been set aside in 2003 going by the stickers left on it and finally sent to the skip recently where my seller got hold of it then sold it as powering-up but otherwise untested.
I couldn't pick it up locally so there was a little risk in receiving a scope that had more damage than it was worth.
Once received, it appeared to have been through some bashing around, light scratches and marks all around, a couple of dents to the top, broken fan, bent PCMCIA cover, dead HDD, one damaged rear foot, two missing side feet. Fortunately it came with the front cover though!
I like the colour LCD screen and the fact that it's a lot quieter than my 9354 or DDA-120 it may even be quieter than the TDS500 (If my memory is good.)
As it needed some bodywork I had a good excuse to take it apart, the inside was very clean, almost dust free, many of the screws needed some re-tightening, I hope the heatsinked components in the PSU are not in the same case I didn't go that far.
It was surprising not to find any HMM memory sockets on the acquisition board, this kills any hope to upgrade it to a M or L version some day, it's stuck with 250k points/channel.
Looking at the service manual and scope's maintenance menu it looks like the HMM modules have been replaced, the flash ADC (MAD442) and acquisition memory (MAM633) have been combined into one component called HAM631.
I can't find any hints in the service manual as to whether there are different versions of the HAM631 for M and L memory dephs.
Does anyone know if the acquisition memory depth is software limited (firmware version, option keys) or maybe hardware limited (SMD jumper resistors configuration) or actually set by the type of HAM631 on the PCB?
The service manual downloaded from KO4BB has no component list and appears to have the wrong PCB layouts as these do show the HMM module sockets.
Does anybody have a better service manual than this?
One small but annoying issue I have is the scope displays "Battery bad: Data may be corrupt" on startup.
This is related to the fact that I have replaced the dead HDD by a CF card and PCMCIA adapter. The scope seems to be reading the backup battery status as if a SRAM card were being used rather than HDD.
The annoying consequence is that I have to reinsert the adapter on every power-on or else I'll get a "No Medium Inserted" message when trying to access the CF card.
Would anyone be able to recommend me a CF-PCMCIA adapter that does not cause this problem?