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| Questions for owners of Agilent X-Series oscilloscopes |
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| Franki:
hi everyone I have several question about some features of the Agilent X-Series oscilloscopes I'm considering before buying some for me and my friends: 1.) a) does it support live transferring of the acquisitioned data over the LAN/VGA or GPIB? (for long-time automated live transferring of measurements, evaluations and then regulations; "automated live transferring" meaning it sends out data without anyone interacting with the scope while the measurement is still going on)? b) If not fully, does it do that at least for lower sample rates? The acquisition/transferring delay need not be that low, several seconds delay would be low enough. 2.) what is the slowest possible data acquisition rate in terms of sample rate(for long term monitoring)? 1 sample every 1, 2 or 5 seconds? The specs says the maximum time base range is 50s/div , but then, how many samples does it have per division? 3.) does it have a floating ground switch/mode? Can its ground on the input line be disconnected from protective earth? Or should one rather use a differential probe, even for measurements <100kHz? I hope some owners of these scopes, and I hope for Dave, can help me. THX for the info in advance |
| EEVblog:
1) Not sure, you'd have to actually try. More than likely, and you might want to consider using the ROLL mode. 2) Yes, it's 50s/div. Do the math based on the memory size for samples/div. 3) No. No scope I know of has this. Only scopes specifically designed with floating inputs. Can you get a demo unit from your local rep? Dave. |
| Franki:
--- Quote from: EEVblog on March 12, 2011, 08:05:08 am ---1) Not sure, you'd have to actually try. More than likely, and you might want to consider using the ROLL mode. --- End quote --- Trying is good, when you have the money or if the vendor accepts returned devices. BTW, that's something I should check. If you can't or won't check that on your devices or someone else here can't or won't do it, I would have to write another email to the vendor. --- Quote from: EEVblog on March 12, 2011, 08:05:08 am ---2) Yes, it's 50s/div. Do the math based on the memory size for samples/div. --- End quote --- I just don't see how to infer from the memory size and other data from the specs what the samples/div is, or am I confused? --- Quote from: EEVblog on March 12, 2011, 08:05:08 am ---3) No. No scope I know of has this. Only scopes specifically designed with floating inputs. --- End quote --- One of my friend says he knows some old Philips and Tektronix scopes that had this. --- Quote from: EEVblog on March 12, 2011, 08:05:08 am ---Can you get a demo unit from your local rep? --- End quote --- they don't have demo units, they only order some on specific orders from their customers and they need full payment in advance :( And this is the only retailer in my state (AFAIK) that sells these devices to private persons :( so this is why I need to ask all those questions before buying them THX |
| alm:
--- Quote from: Franki on March 12, 2011, 05:02:11 am ---1.) a) does it support live transferring of the acquisitioned data over the LAN/VGA or GPIB? (for long-time automated live transferring of measurements, evaluations and then regulations; "automated live transferring" meaning it sends out data without anyone interacting with the scope while the measurement is still going on)? b) If not fully, does it do that at least for lower sample rates? The acquisition/transferring delay need not be that low, several seconds delay would be low enough. --- End quote --- You can sample the full memory in one go, and transfer the results to a computer (at least any DSO with SCPI support I've seen does). Scopes are not usually designed as digitizers, so I doubt you can do this continuously (but if the transfer delay is acceptable, it might work). Transferring the full memory is likely to take more than a few seconds. I'm not sure if the standard software supports acquiring data in a loop, you may have to do some programming or buy something like SignalExpress for that. --- Quote from: Franki on March 12, 2011, 08:53:43 am ---I just don't see how to infer from the memory size and other data from the specs what the samples/div is, or am I confused? --- End quote --- Samples/div = record length / number of horizontal divs? This usually falls apart at the very fast sweep speeds, since the scope typically doesn't have enough sample rate for that. --- Quote from: Franki on March 12, 2011, 08:53:43 am --- --- Quote from: EEVblog on March 12, 2011, 08:05:08 am ---3) No. No scope I know of has this. Only scopes specifically designed with floating inputs. --- End quote --- One of my friend says he knows some old Philips and Tektronix scopes that had this. --- End quote --- I've seen at least one ex-Tektronix employee deny that Tektronix ever installed such a thing. Was probably a custom mod by the customer. There are easier ways to get fried without having to buy a $1k+ scope. |
| mikeselectricstuff:
--- Quote from: alm on March 12, 2011, 12:35:17 pm --- --- Quote from: Franki on March 12, 2011, 05:02:11 am ---1.) a) does it support live transferring of the acquisitioned data over the LAN/VGA or GPIB? (for long-time automated live transferring of measurements, evaluations and then regulations; "automated live transferring" meaning it sends out data without anyone interacting with the scope while the measurement is still going on)? b) If not fully, does it do that at least for lower sample rates? The acquisition/transferring delay need not be that low, several seconds delay would be low enough. --- End quote --- You can sample the full memory in one go, and transfer the results to a computer (at least any DSO with SCPI support I've seen does). Scopes are not usually designed as digitizers, so I doubt you can do this continuously (but if the transfer delay is acceptable, it might work). Transferring the full memory is likely to take more than a few seconds. --- End quote --- I'd suggest reading the programming manual which is on the Agilent site --- Quote --- --- Quote from: Franki on March 12, 2011, 08:53:43 am --- --- Quote from: EEVblog on March 12, 2011, 08:05:08 am ---3) No. No scope I know of has this. Only scopes specifically designed with floating inputs. --- End quote --- One of my friend says he knows some old Philips and Tektronix scopes that had this. --- End quote --- I've seen at least one ex-Tektronix employee deny that Tektronix ever installed such a thing. Was probably a custom mod by the customer. There are easier ways to get fried without having to buy a $1k+ scope. --- End quote --- There are some Teks with isolated inputs. My guess is for safety reasons they may not have an option to ground them, although it would be useful. Have any DSOX's actually made it to customers yet? I've not seen any evidence of stock showing at distributors like RS or Farnell |
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