Author Topic: Conversion of 500MHz TDS744A to 1GHz TDS784A  (Read 77384 times)

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Offline David Hess

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Re: Conversion of 500MHz TDS744A to 1GHz TDS784A
« Reply #75 on: September 22, 2016, 08:11:31 pm »
Speaking of FastFrame... What sort of use case is it for? There's no example in the manual and I never could really think of a situation where it would be useful. (Obviously it is useful, or it wouldn't be a feature!)

It allows capturing only the relevant parts of a signal around the trigger points and usually produces a much higher waveform acquisition rate without the disadvantages of DPO mode.
 

Offline rx8pilot

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Re: Conversion of 500MHz TDS744A to 1GHz TDS784A
« Reply #76 on: September 22, 2016, 08:14:10 pm »
To my surprise - the voice control on the Keysight scope is an awesome feature that I use all the time. When my hands are delicately trying to probe two tiny points - the voice control can save my ass. Start, stop, scaling, and more. Super handy and works with a normal voice and all the fans on my bench going full blast too. I would give up touch screen before voice control.
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Offline snoopy

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Re: Conversion of 500MHz TDS744A to 1GHz TDS784A
« Reply #77 on: September 23, 2016, 12:01:31 am »

The first one were the 54645A and the 54645D (MSO version of the 54645A).

Can't remember what the waveform rate was for the original but I believe it was somewhere in the 250k wfms/s region. The important bit however was that it was not just one large number at a specific setting (as with InstaVu/DPO), it reached high update rates in almost any setting.

Hmmm - you need to be more specific regarding wfrms/s because when dave reviewed an older HP 54622 (2000 vintage) with MegaZoom it says something about 25 million vectors per second ??? Go to 8:40 where dave tests the actual update rate - a measily 520 wfrms/s at best  :--

« Last Edit: September 23, 2016, 12:10:54 am by snoopy »
 

Online MarkL

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Re: Conversion of 500MHz TDS744A to 1GHz TDS784A
« Reply #78 on: September 23, 2016, 02:03:53 am »
Hmmm - you need to be more specific regarding wfrms/s because when dave reviewed an older HP 54622 (2000 vintage) with MegaZoom it says something about 25 million vectors per second ??? Go to 8:40 where dave tests the actual update rate - a measily 520 wfrms/s at best  :--
Different meaning of vectors; from the 54645A manual:

Quote
Using Vectors

One of the most fundamental choices you must make about your display is whether to draw vectors (connect the dots)  between the samples, or simply let the samples fill in the waveform. To some degree, this is a matter of personal preference, but it also depends on the waveform.

· You will probably operate the oscilloscope most often with vectors on. Having vectors on slows the display of the oscilloscope, thus works better for slower sweep speeds, peak detect, or average displays, and signals with stable triggers.

· Having vectors off works better for fast sweep speeds, normal displays, or unstable triggers. Complex analog signals like video and eye diagrams show more intensity information with vectors off. Turn vectors off when the maximum display rate is required, or when highly complex or multi-valued waveforms are displayed.
 

Offline Daxxin

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Re: Conversion of 500MHz TDS744A to 1GHz TDS784A
« Reply #79 on: December 13, 2017, 11:04:46 am »
Did the modification removing R1064 and 4 caps , but no difference with the banner
 

Offline Jwalling

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Re: Conversion of 500MHz TDS744A to 1GHz TDS784A
« Reply #80 on: December 13, 2017, 11:21:58 am »
Not surprising. R1064 should be installed. The other three should be removed.  ;)
Jay

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Offline Vlad_01

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Re: Conversion of 500MHz TDS744A to 1GHz TDS784A
« Reply #81 on: March 09, 2018, 04:08:49 am »
TDS744  (without "A")
firmware v.1.0e
Options 13, 1F,1M, 2F

All combinations of resistors are tried, no result.
It looks like I should change the firmware.
On what to change and where to look the instruction?
What is the difference between TDS744 and TDS744A?



There were 3 lintels - R1061, R1062 & R1064.
All 16 combinations are checked, no result.

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« Last Edit: March 09, 2018, 11:36:38 pm by Vlad_01 »
 

Offline oaba

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Re: Conversion of 500MHz TDS744A to 1GHz TDS784A
« Reply #82 on: August 30, 2018, 10:29:54 pm »
Vlad_01
I have the same problem. Have you find it out?
What are those configuration 0 resistor are for at tds744?
I removed the capacitors anyway.
« Last Edit: August 30, 2018, 10:31:36 pm by oaba »
 

Offline Jwalling

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Re: Conversion of 500MHz TDS744A to 1GHz TDS784A
« Reply #83 on: August 31, 2018, 09:52:26 am »
Vlad_01
I have the same problem. Have you find it out?
What are those configuration 0 resistor are for at tds744?
I removed the capacitors anyway.

The TDS784A did not exist when the non-suffixed TDS744 did. I think removing the caps and installing R1064 only will let the scope sample @ 4GS/s on 1 channel and 1GS/s on four channels simultaneously, but it will still say that it's a TDS744.
Jay

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Offline oaba

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Re: Conversion of 500MHz TDS744A to 1GHz TDS784A
« Reply #84 on: August 31, 2018, 11:04:30 pm »
I got it.
Is it possible to modify the firmware? Is that in the NVRAM.
Have you replaced it or saved it?
To prevent future problems.
Thanks.
 

Offline Jwalling

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Re: Conversion of 500MHz TDS744A to 1GHz TDS784A
« Reply #85 on: September 01, 2018, 09:25:27 am »
I got it.
Is it possible to modify the firmware? Is that in the NVRAM.
Have you replaced it or saved it?
To prevent future problems.
Thanks.

It's possible, but I wouldn't try it. Google Tekfwtool. You may brick your scope trying...
Jay

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Offline Alfons

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Re: Conversion of 500MHz TDS744A to 1GHz TDS784A
« Reply #86 on: November 01, 2019, 02:33:58 pm »
I did it now and it worked immediately. My TDS744a with firmware version 1.1e is now a TDS784a. However, in the first test, signals recorded at 4GS / s showed strong distortions, switched to 2GS / s (two channels turned on), everything was normal. I then ran SPC, which ended with "pass". After that everything was back to normal, the distortions were gone. The bandwidth has doubled and it looks quite accurate even without calibration.

 

Offline strick

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Re: Conversion of 500MHz TDS744A to 1GHz TDS784A
« Reply #87 on: November 06, 2019, 01:46:01 am »
Alfons,
would you mind sharing how you updated the firmware on your 744A?  I've updated the 540A series and the 500/700C series, but I haven't seen a tool that worked on the 744A.  All the 744A boards (except one) had the 2F008SA flash and the normal Tektool was built for the 2F016.  Tektool5 is around and works ok for the 500A series but is for the 2F010 and 2F020 chips.

thanks,
Strick
 

Offline radioguy123

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Re: Conversion of 500MHz TDS744A to 1GHz TDS784A
« Reply #88 on: November 11, 2019, 06:04:28 pm »
Is it possible to convert a TDS540C into a TDS580C ?
 

Offline Alfons

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Re: Conversion of 500MHz TDS744A to 1GHz TDS784A
« Reply #89 on: November 11, 2019, 10:19:33 pm »
Alfons,
would you mind sharing how you updated the firmware on your 744A?  I've updated the 540A series and the 500/700C series, but I haven't seen a tool that worked on the 744A.  All the 744A boards (except one) had the 2F008SA flash and the normal Tektool was built for the 2F016.  Tektool5 is around and works ok for the 500A series but is for the 2F010 and 2F020 chips.

thanks,
Strick

Maybe I did not express myself correctly? I did not change the firmware, but the hardware (remove one resistor and few C's). But that is synonymous here everything in the thread. I have not read anything yet that somebody managed to put up another firmware.

« Last Edit: November 13, 2019, 07:35:11 am by Alfons »
 

Offline radioguy123

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Re: Conversion of 500MHz TDS744A to 1GHz TDS784A
« Reply #90 on: November 12, 2019, 02:00:28 pm »
I was just wondering if it is possible to convert a 500mhz TDS540C into a 1Ghz TDS580C ? Just wondering if anyone has researched this ?
Thanks for any info on this.
 

Offline Jay_Diddy_BTopic starter

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Re: Conversion of 500MHz TDS744A to 1GHz TDS784A
« Reply #91 on: November 13, 2019, 03:31:44 am »
I was just wondering if it is possible to convert a 500mhz TDS540C into a 1Ghz TDS580C ? Just wondering if anyone has researched this ?
Thanks for any info on this.

Do you have a TDS540C?

If you do, open the case carefully remove the acquisition board and look for configuration resistors. They will probably be on the back of the board.

If you don't try searching the internet for photographs of the A10 acquisition board.


Regards,

Jay_Diddy_B
 

Offline radioguy123

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Re: Conversion of 500MHz TDS744A to 1GHz TDS784A
« Reply #92 on: November 13, 2019, 04:21:37 pm »
Yes I do have a TDS540C
So it's the A10 acquisition board that you change ?
I will get the scope open and look at the back of the board.
I have read through this thread and I know you have to remove some capacitors also.
Not to mention the re-cal.
I'll get you the board number in a little bit.
I was just wondering if anyone has tried this.
Thanks for the reply.
The A11 board is: 679-4002-00
The A10 board is: 679-4204-00
« Last Edit: November 13, 2019, 11:22:36 pm by radioguy123 »
 

Offline Alfons

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Re: Conversion of 500MHz TDS744A to 1GHz TDS784A
« Reply #93 on: November 13, 2019, 06:33:28 pm »
Please read the thread. You find there, what to look for. On the bottom of the acquisition board are resistors, four pieces. How exactly your equipment must look to change something, I do not know. With my board, it was only necessary to remove one resistor.
 

Offline madao

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Re: Conversion of 500MHz TDS744A to 1GHz TDS784A
« Reply #94 on: November 17, 2019, 07:08:33 am »
I think, it is possible.



I have collected list of  A10 & A11 Board part numbers.
TDS540C has same A10 board as by  TDS754C.

TDS540C is just a  TDS754C with monochrome CRT and not 13 & 2F options as standard.

regards
matt

 

Offline Galen

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Re: Conversion of 500MHz TDS744A to 1GHz TDS784A
« Reply #95 on: December 17, 2019, 02:07:18 pm »
I have tried to convert my TDS540C to TDS580C, by take out the 4 capacitors and only short the R1064, it shows 4Gs/s, but the banner shows TDS xxx. my firmware is FV:v5.0e. 
Passed SPC.
Maybe it is the firmware version problem?
Delighted when problem fixed
 

Offline thm_w

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Re: Conversion of 500MHz TDS744A to 1GHz TDS784A
« Reply #96 on: December 17, 2019, 10:45:09 pm »
I have tried to convert my TDS540C to TDS580C, by take out the 4 capacitors and only short the R1064, it shows 4Gs/s, but the banner shows TDS xxx. my firmware is FV:v5.0e. 
Passed SPC.
Maybe it is the firmware version problem?

Did you try 1061 instead of 1064?
What was the original resistor configuration?
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Offline geostep

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Re: Conversion of 500MHz TDS744A to 1GHz TDS784A
« Reply #97 on: December 17, 2019, 10:52:59 pm »
I recently got a 540C from eBay. So you have captured my interest. It would be sweet to get it running at 1 GHz. Frustratingly I can't access it until after Christmas.    |O
So it has to sit in a box... for now.  After Christmas I'll open mine up, check my firmware version, look at the programming resistors and caps as well.

I'm hoping there is newer firmware out there that will allow 540C's with only R1064 think it is a 580C.
I'll look around and see if I can find anything about it.

- George
 

Offline Galen

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Re: Conversion of 500MHz TDS744A to 1GHz TDS784A
« Reply #98 on: December 17, 2019, 11:36:02 pm »
I have tried to convert my TDS540C to TDS580C, by take out the 4 capacitors and only short the R1064, it shows 4Gs/s, but the banner shows TDS xxx. my firmware is FV:v5.0e. 
Passed SPC.
Maybe it is the firmware version problem?

Did you try 1061 instead of 1064?
What was the original resistor configuration?
Thanks thm_w. The original ID resister is R1061,1062,1063 shorted.
I will try R1061 today, to see If it works.
Delighted when problem fixed
 

Offline Galen

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Re: Conversion of 500MHz TDS744A to 1GHz TDS784A
« Reply #99 on: December 18, 2019, 11:42:20 am »
Report the progress. short R1061 only, it shows TDS540C, the sample rate max 1G for 1 or 2 channel on.
So, I changed back to shorting R1064 only. Very possible the FW version too low.
Have to bear the 'TDS xxx' now, until upgrade the FW.
« Last Edit: December 18, 2019, 11:51:36 am by Galen »
Delighted when problem fixed
 
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