Author Topic: Yet another fast edge pulse generator  (Read 28489 times)

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Offline Leo Bodnar

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Re: Yet another fast edge pulse generator
« Reply #50 on: July 15, 2017, 02:12:42 AM »
I have assembled and tested all the last revision boards I had. 
They all have identical rise/fall time and profiles to within +-2ps.  Therefore, I won't be printing individual screenshots like I planned before - they all look the same within my measurement capabilities.  I have attached representative screen captures for the whole batch.

I am planning to finish output level configuration software this weekend and start shipping immediately and reorder more PCBs and parts.
I did not expect that level of interest - for which I am grateful :)

Thanks
Leo



 
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Online BravoV

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Re: Yet another fast edge pulse generator
« Reply #51 on: July 15, 2017, 02:38:18 AM »
I'm in for one, thank you.  :-+

Offline TheAmmoniacal

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Re: Yet another fast edge pulse generator
« Reply #52 on: July 15, 2017, 02:39:03 AM »
I would also be interested in one? Just PM me with details.
« Last Edit: July 15, 2017, 02:51:16 AM by TheAmmoniacal »
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Offline mk_

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Re: Yet another fast edge pulse generator
« Reply #53 on: July 15, 2017, 03:50:42 AM »
I'm in for two boards

thanks

Michael
 

Offline metrologist

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Re: Yet another fast edge pulse generator
« Reply #54 on: July 15, 2017, 05:27:21 AM »
I have assembled and tested all the last revision boards I had. 
They all have identical rise/fall time and profiles to within +-2ps.  Therefore, I won't be printing individual screenshots like I planned before - they all look the same within my measurement capabilities.  I have attached representative screen captures for the whole batch.

I am planning to finish output level configuration software this weekend and start shipping immediately and reorder more PCBs and parts.
I did not expect that level of interest - for which I am grateful :)

Thanks
Leo

Very impressive! Let me ask a question.

One for me, if you can ship to US.  I'm happy to take a single US shipment as remail them to final destination.

electrolust, you are a confirmed US distributor?

Are all of the assembled units already spoken for?

I might have to join the TEA party here soon...
 

Offline jpb

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Re: Yet another fast edge pulse generator
« Reply #55 on: July 15, 2017, 05:32:04 AM »
If they are still available then I would like to register my interest, thank you.
 

Offline Leo Bodnar

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Re: Yet another fast edge pulse generator
« Reply #56 on: July 15, 2017, 05:38:05 AM »
I intend to keep making them until there is interest so don't panic, everyone who wants one will have a chance to get one.
Leo
 
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Offline barry14

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Re: Yet another fast edge pulse generator
« Reply #57 on: July 15, 2017, 09:10:14 AM »
You can put me down for one unit also.  I appreciate the effort you put into this project.  Thanks from everyone.
 

Online WastelandTek

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Re: Yet another fast edge pulse generator
« Reply #58 on: July 15, 2017, 02:24:09 PM »
I intend to keep making them until there is interest so don't panic, everyone who wants one will have a chance to get one.
Leo

sweet!
I'm new here, but I tend to be pretty gregarious, so if I'm out of my lane please call me out.
 

Offline Leo Bodnar

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Re: Yet another fast edge pulse generator
« Reply #59 on: July 16, 2017, 03:19:17 AM »
Gentlemen,

I have finished the configuration software and I call the project ready to ship. 
You can adjust output level from 50mV to about 1.2V peak-to-peak and flip the trigger/output phase in case you are using sampling scope.  Not much of exciting science.  Settings are non-volatile, stored in the device and survive power off. 

There is a user calibration multiplier if you want to fudge voltage levels to read reasonably accurate value.  Output matches indicated value to about 5-10%.  Rise and fall times seems to stay the same throughout the whole output range (50-1200mVpp.)

I have 12 units in stock available here for shipping on Monday July the 17th: USB Pulser

The next batch is coming on Wednesday so I am going to continue taking orders after the first 12 are gone.  If you order does not ship on Monday, don't panic it's being assembled, tested, calibrated and shipped this week.

Many thanks for this fun!
Leo
« Last Edit: July 16, 2017, 03:21:41 AM by Leo Bodnar »
 

Offline TheAmmoniacal

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Re: Yet another fast edge pulse generator
« Reply #60 on: July 16, 2017, 03:28:38 AM »
Looks good!

Quote
Thank You! We Appreciate your Business!
Your Order Number is: 20498

Thanks.
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Offline JPortici

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Re: Yet another fast edge pulse generator
« Reply #61 on: July 16, 2017, 03:34:26 AM »
excellent :-+ will order this week
 
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Offline Berni

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Re: Yet another fast edge pulse generator
« Reply #62 on: July 16, 2017, 04:00:35 AM »
Nice, already went ahed and ordered mine.

Im curious how will it look like on my 4GHz scope.
 
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Online H.O

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Re: Yet another fast edge pulse generator
« Reply #63 on: July 16, 2017, 04:19:48 AM »
Placed my order as well, thank you for making this available, much appreciated!
 
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Offline Leo Bodnar

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Re: Yet another fast edge pulse generator
« Reply #64 on: July 16, 2017, 04:34:51 AM »
Cheers, guys.  This is probably an ultimate case of impulse buying.

Offline richnormand

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Re: Yet another fast edge pulse generator
« Reply #65 on: July 16, 2017, 04:50:47 AM »
In response to my previous posting indicating my interest I just placed an order on your website a few minutes ago :)

Will be interesting how my sampling scope signal looks with your unit.
Software is a very nice touch too.

Cheers.

 
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Online macboy

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Re: Yet another fast edge pulse generator
« Reply #66 on: July 16, 2017, 05:08:04 AM »
Count me in for one unit.
Ordered one unit. Looking forward to playing with this on my Lecroy WavePro 960 and Tek 2465A.
« Last Edit: July 16, 2017, 05:18:24 AM by macboy »
 

Offline HighVoltage

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Re: Yet another fast edge pulse generator
« Reply #67 on: July 16, 2017, 05:19:33 AM »

I'll be happy to build a few for sale if this is something useful to others.

Leo
If you build some, I am interested in buying one.
Thanks
Really good work!
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Online macboy

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Re: Yet another fast edge pulse generator
« Reply #68 on: July 16, 2017, 05:21:59 AM »
Cheers, guys.  This is probably an ultimate case of impulse buying.
Impulse buying? Never! you can't measure risetime with an impulse  :P
 

Offline HighVoltage

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Re: Yet another fast edge pulse generator
« Reply #69 on: July 16, 2017, 05:40:56 AM »
Code: [Select]
Thank You! We Appreciate your Business!
Your Order Number is: 20505

Thanks, I just ordered one on your website
There are 3 kinds of people in this world, those who can count and those who can not.
 
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Offline Berni

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Re: Yet another fast edge pulse generator
« Reply #70 on: July 16, 2017, 05:56:24 AM »
Also it would be nice if the frequency was adjustable from a range of choices. For example this is useful for TDR measurements of cables and if you have a long cable then you need a lower frequency than 10MHz in order for all the reflections to make it back before the next pulse. Perhaps make it a choice of 10MHz 1MHz 100KHz 10KHz 1KHz.
 

Offline jpb

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Re: Yet another fast edge pulse generator
« Reply #71 on: July 16, 2017, 06:01:51 AM »
Your Order Number is: 20506 (Just placed order on website)
Thanks
 
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Offline Leo Bodnar

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Re: Yet another fast edge pulse generator
« Reply #72 on: July 16, 2017, 07:24:46 AM »
Also it would be nice if the frequency was adjustable from a range of choices. For example this is useful for TDR measurements of cables and if you have a long cable then you need a lower frequency than 10MHz in order for all the reflections to make it back before the next pulse. Perhaps make it a choice of 10MHz 1MHz 100KHz 10KHz 1KHz.
Yes, I have considered TDR use for long cables.  This would need quite a redesign as opposed to just a tweak.  For example, current version has AC coupled output and 10MHz pulse droop on 50R load is only a few percent across the pulse span.
With 1kHz the output would have to be DC coupled which will need a redesign and re-qualification of the frontend.  The tradeoff will probably include losing crisp pulse fronts and going back to 100+ps risetimes.  Isn't spread spectrum TDR all the rage now for new designs anyway?

Online rx8pilot

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Re: Yet another fast edge pulse generator
« Reply #73 on: July 16, 2017, 07:46:15 AM »
Just placed the order. Look forward to pulsing. Thanks Leo - looks like a nice clean design
Thank you EEVBlog for all the support in the Keysight Test to Impress Giveaway voting!
 
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Offline Berni

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Re: Yet another fast edge pulse generator
« Reply #74 on: July 16, 2017, 08:26:20 AM »
Also it would be nice if the frequency was adjustable from a range of choices. For example this is useful for TDR measurements of cables and if you have a long cable then you need a lower frequency than 10MHz in order for all the reflections to make it back before the next pulse. Perhaps make it a choice of 10MHz 1MHz 100KHz 10KHz 1KHz.
Yes, I have considered TDR use for long cables.  This would need quite a redesign as opposed to just a tweak.  For example, current version has AC coupled output and 10MHz pulse droop on 50R load is only a few percent across the pulse span.
With 1kHz the output would have to be DC coupled which will need a redesign and re-qualification of the frontend.  The tradeoff will probably include losing crisp pulse fronts and going back to 100+ps risetimes.  Isn't spread spectrum TDR all the rage now for new designs anyway?

Ah right i didn't know there was an AC coupling limitation with it. Makes sense to have a fixed frequency then. The 10MHz is enough for about 10m of cable anyway.
 


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