Thanks for the reminder "rf-loop" but from what I read, you had two channel generator for this measurement.
2) The unit no longer glides easily, I can now press any button on the scope with one finger and it won't slide either with the feet in or out.
If someone think "what rubber".
Time ago Owon made small changes to these back foots.
There is a small pits for rubber pieces so it is less slippery.
5$ on ebay:
http://www.ebay.com/itm/1-pcs-Brushless-DC-Cooling-11-Blade-Fan-6010s-12V-60x60x10mm-2-Wires-/160896610367?pt=LH_DefaultDomain_0&hash=item25762f703f
Perhaps your HW is 7102 1143xxx ?
Do you have any start up problem or any problem during use. Only problem is led color or any other problem?
You tell that FAN speed also drop.
The member marmad has suggest a method for wfps measurement, but the Owon hasn't the choice "both of" on pulse triggering.
"marmad" have kindly suggested also other method.
Result with this other method is in this thread message "Reply #1227 on: June 09, 2013, 06:13:08 AM »"
No need scroll back, here is agen this result table:
After capture and display waveform Owon can trig agen and capture next waveform after 2.35ms and show this captured waveform also on the display. TFT update speed is of course more slower. (and Owon trig out what is not real trig out exept with very slow speeds, just as I have told, it can ring bell in rest room that scope have trigged if it was waiting state leaved in lab.
Yes, it is wrong.
My opinion is: With this double pulse method can not proof continuous waveform update speed.
Depending on the setting of the time base the screen refresh rate of the SDS7102 falls in the following ranges:
Acquire Length Screen Refresh Rate
----------------- -----------------------
1K 76.9 - 425.5 wfm/s
10K 65.8 - 404.9 wfm/s
100K 62.5 - 390.6 wfm/s
1M 40 - 288 wfm/s
10M 10.5 - 80 wfm/s
------------------------------------------------------------------------------------------------------------------------------------
If this interpretation is correct it should put to rest the notion that the SDS7102 refresh rate is subpar compared to other DSOs in its price range. Thanks for the excellent data. I'm sure it took quite a bit of time and effort to compile it.
Depending on the setting of the time base the screen refresh rate of the SDS7102 falls in the following ranges:
Acquire Length Screen Refresh Rate
----------------- -----------------------
1K 76.9 - 425.5 wfm/s
10K 65.8 - 404.9 wfm/s
100K 62.5 - 390.6 wfm/s
1M 40 - 288 wfm/s
10M 10.5 - 80 wfm/s
------------------------------------------------------------------------------------------------------------------------------------
If this interpretation is correct it should put to rest the notion that the SDS7102 refresh rate is subpar compared to other DSOs in its price range. Thanks for the excellent data. I'm sure it took quite a bit of time and effort to compile it.
Tom - this is unverified data and don't think it's helpful to spread what amounts to (from all we know until now) misinformation. Whether or not the Owon can capture a single pair of waveforms (or a few in a row) in this amount of time is irrelevant: the Owon is a DSO that has a slow continuous waveform update rate - there is absolutely no doubt about that. Not only is it readily apparent when you use the device - it has been confirmed in many ways: from numerous glitch tests I ran almost two years ago - to Dave's simple glitch demonstration in his video - to email confirmation from Owon themselves.
The Trigger Out rates repeated over and over in this thread - and measured again by Dave in his video - ARE the waveform update rates of this DSO (or very close to them) - this is what Owon confirmed in writing a long time ago already. Please don't try to convince people that it's otherwise unless there is some definitive proof beyond this chart.
I have used the Rigol DS1052E, the Owon SDS7102, the Hantek DSO5062B, and now the Rigol DS2000. The Owon was absolutely, without a doubt, the slowest of all these by a significant margin.
Perhaps your HW is 7102 1143xxx ?
Do you have any start up problem or any problem during use. Only problem is led color or any other problem?
You tell that FAN speed also drop.
I have a similar case, model number Owon 7102 1246099
After a certain time the system begins to slow down and finally it doesn't respond at all. No knobs are working. The display shows the measured waveform. Sometimes it works for weeks w/o any problem, but sometimes it won't work at all for, only display is functioning.
I have purchased this unit brand new in 2013 february. The problem appeared first time during the initial test.
Do You have any idea what can cause this issue?
About wfps for Owon SDS7102.
Guys I'm not an expert, but If I connected the trigger output (P/F) of Owon to a multimeter like Fluke45 at Frequency Postition, can you tell me what really measures with that? Is this appropriate for wfps measures?
If it yes, then Owon measures from low 10Hz (10M) to 450Hz(1K).
However, I'm sure you have read, that the reliability of this method has been put in question.
Depending on the setting of the time base the screen refresh rate of the SDS7102 falls in the following ranges:
Acquire Length Screen Refresh Rate
----------------- -----------------------
1K 76.9 - 425.5 wfm/s
10K 65.8 - 404.9 wfm/s
100K 62.5 - 390.6 wfm/s
1M 40 - 288 wfm/s
10M 10.5 - 80 wfm/s
------------------------------------------------------------------------------------------------------------------------------------
If this interpretation is correct it should put to rest the notion that the SDS7102 refresh rate is subpar compared to other DSOs in its price range. Thanks for the excellent data. I'm sure it took quite a bit of time and effort to compile it.
Tom - this is unverified data and don't think it's helpful to spread what amounts to (from all we know until now) misinformation. Whether or not the Owon can capture a single pair of waveforms (or a few in a row) in this amount of time is irrelevant: the Owon is a DSO that has a slow continuous waveform update rate - there is absolutely no doubt about that. Not only is it readily apparent when you use the device - it has been confirmed in many ways: from numerous glitch tests I ran almost two years ago - to Dave's simple glitch demonstration in his video - to email confirmation from Owon themselves.
The Trigger Out rates repeated over and over in this thread - and measured again by Dave in his video - ARE the waveform update rates of this DSO (or very close to them) - this is what Owon confirmed in writing a long time ago already. Please don't try to convince people that it's otherwise unless there is some definitive proof beyond this chart.
I have used the Rigol DS1052E, the Owon SDS7102, the Hantek DSO5062B, and now the Rigol DS2000. The Owon was absolutely, without a doubt, the slowest of all these by a significant margin.
Thanks for the reply and the rebuttal. As I stated, I'm unable to verify this chart. So if it looks like I'm trying to sway peoples opinions, it wasn't my intention. As a new member of this forum, I'm amazed at the number of knowledgeable people like yourself that contribute to its popularity. For this reason, I doubt that my post will be misconstrued as gospel and taken at face value.
I've been able to verify the Trigger Out rates using a second scope, and if this is a reliable method for determining the refresh rate, I can confirm that the refresh rates I detected agree with yours and Dave's findings. However, I'm sure you have read, that the reliability of this method has been put in question. So I'm looking forward to additional discussion, clarifications, and tests results. Perhaps something has changed since you tested this hardware 2 years ago. If that's the case, I surely would like to know.
If the chart posted by rf-loop is misinformation, I would like to know that too!
But, it need carefully note that there is not claim for continuous waveform capture rate!
But, it need carefully note that there is not claim for continuous waveform capture rate!
Which is exactly what I was referring to when I wrote "unverified": as continuous waveform capture rate. When Tom writes those data in the form of HZ, he's implying they are continuous.
Yes, it is wrong.
My opinion is: With this double pulse method can not proof continuous waveform update speed.
But still result from Owon is markable becouse it tell that it can trig to random occurence before it can expect if use max continuous average waveform update rate for thinking. So, inside this some low average speed it can do momentarily also capture much faster. And this duble pulse method show this fastest possible retrig/capture period. There is not DPO memory for collect many of these over each others, there can be perhaps just one waveform waiting in sampling buffer for transfer to memory where from it displayed?
Also my old photograph method supports the idea that the average maximum is around 35wfrm/s. And perhaps I have now some explanation why in my old photograph method these waveforms traces on the screen have sometimes markable different spacing but in theory they need be nearly same spacing becouse signal sweep was linear. Becouse it can trig and capture faster. (but not continuously)
About wfps for Owon SDS7102.
Guys I'm not an expert, but If I connected the trigger output (P/F) of Owon to a multimeter like Fluke45 at Frequency Postition, can you tell me what really measures with that? Is this appropriate for wfps measures?
If it yes, then Owon measures from low 10Hz (10M) to 450Hz(1K).
And on what timebases do you measure these frequencies? If you'll recall, in Dave's video, he has a frequency counter hooked up to the Trigger Out, and he can never get it to read more than 35Hz - regardless of the sample length.
About wfps for Owon SDS7102.
Guys I'm not an expert, but If I connected the trigger output (P/F) of Owon to a multimeter like Fluke45 at Frequency Postition, can you tell me what really measures with that? Is this appropriate for wfps measures?
If it yes, then Owon measures from low 10Hz (10M) to 450Hz(1K).
And on what timebases do you measure these frequencies? If you'll recall, in Dave's video, he has a frequency counter hooked up to the Trigger Out, and he can never get it to read more than 35Hz - regardless of the sample length.
But still result from Owon is markable becouse it tell that it can trig to random occurence before it can expect if use max continuous average waveform update rate for thinking. So, inside this some low average speed it can do momentarily also capture much faster. And this duble pulse method show this fastest possible retrig/capture period. There is not DPO memory for collect many of these over each others, there can be perhaps just one waveform waiting in sampling buffer for transfer to memory where from it displayed?
Also my old photograph method supports the idea that the average maximum is around 35wfrm/s. And perhaps I have now some explanation why in my old photograph method these waveforms traces on the screen have sometimes markable different spacing but in theory they need be nearly same spacing becouse signal sweep was linear. Becouse it can trig and capture faster. (but not continuously)
One old test image sample is here.
(and Owon trig out what is not real trig out exept with very slow speeds, just as I have told, it can ring bell in rest room that scope have trigged if it was waiting state leaved in lab.
Daves review says a lot about the original review for this thread (CRAP ). That is the review by the way. Otherwise this thread would have died ages ago along with the scope.
Just to say there are some pretty useless reviewers out there.