I've a specific application that needs segmented memory.
I need to capture EVERY half wave of a mains cycle ( 50Hz ) over say a 5 second period.
I accept there will be a short time where the scope needs to re-trigger ( say on the 50Hz zero cross point ), which means I won't get ALL the waveform, but hopefully most of it. A re-trigger 'dead time' of less than 500uS would just be acceptable but the faster it can do it the better.
I understand that some scopes operating in this mode do not update the display while doing the capture - this is acceptable.
I need the capture to analyse it with at least 1uS or better resolution.
This implies a single half cycle using 10,000 (10K )memory points. One seconds worth of data ( 100 half cycles ) is 100x10,000 points ( 1M pt)
Having all the captured segments in memory for 5 seconds is 5Mpt. Clearly with 20M or more I can store at much higher resolution.
Is it possible to replay this data on the screen and overlay each segment one by one to compare them against each other?
Is this scope capable of retriggering this fast without too much loss of data between triggers - if so what is the best retrigger delay attainable in this case.
FYI. The R&S RTB2000 series can do this - but the overlay ( multiple persistence if you like ) does not work properly.
I tried it on a Rigol DS7000 but couldn't get it to do it properly - possibly a very early FW version.
Anyone having a MSO5000 could comment on this.