Day ago I get new DS1052E from China.
Command modification did NOT work as before!
I have try with many variations how to do.
With these units what I have before all goes ok.
I have not yet find solution with these new. If I try as before, display go sometimes "black" and only button what make anything is power ON/OFF. After this scope continues as DS1052E (serial number it (sometimes) keep as I type it, but it return to 1052). Some times there is only white random scratch over model number row from left to right over display.) One time it was totally difficult to return so that system display was ok.
FW with these new are exactly same 020202
Only difference what I can see is different start of serial number after letters. (first 4 digits... maybe these are some "prefix" what indicate some product revisions?
So I think we need continue more public discussions to push factory make good stop for modifications. We can teach them to do hack proof scopes. Maybe they make nearly "waterproof" next revision. (or this what I have now is just this)
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Do NOT try try this modification with RS232 communication if you do not really know how to do this kind of RS232 communication what works perfect. It need work perfect in HW level and it must do without any mistake in data. If you are not really sure how to do reliable trustworth and robust serial connection do not even try. You may seriously damage your oscilloscope. Remember: this use undocumented commands! fail in data may damage your machine nearly as permanently.
Before you do anything with undocumented commands you need (minimum) be sure that communication have no any kind error what may product unwanted transmitted data inside oscilloscope.
Also do not trust Windows/PC RS232 port. It may be out of specifications by many meanings even with voltage levels.
Any missing, extra or wrong data may damage your scope with these undocumented commands.
This is only one small example about RS232 problems with PC and Microsoft (not related to this mod but related to RS232 many kind of possible problems with today computers. (In TTY time it was different):
http://www.home.agilent.com/agilent/editorial.jspx?cc=US&lc=eng&ckey=131609&nid=-35204.0.00&id=131609"Problems Using RS-232 on Agilent Instruments with Laptop PCs running any Microsoft OS
Symptoms: Timeouts, corrupt data, missing data, error messages while uploading data
"