Search found 73 matches

by fenugrec
May 27th, 2018, 6:17 am
Forum: Other or Discontinued Oscilloscopes
Topic: TDS420 Options Possible?
Replies: 17
Views: 10861

Re: TDS420 Options Possible?

Igorkasona1233 wrote:
May 26th, 2018, 9:07 am
How do i actually use the debug feature, just using the -d is not working :)
strange, either -d or --debug should work... did you compile yourself ?
by fenugrec
May 25th, 2018, 11:37 am
Forum: Other or Discontinued Oscilloscopes
Topic: TDS420 Options Possible?
Replies: 17
Views: 10861

Re: TDS420 Options Possible?

Yup that dump is the Main Firmware but i got an error before it all was dumped, im maybe using the wrong address range. Well I'm almost 100% sure you have the correct start address 0x0100 0000, because I recognize the first few hundred bytes as very similar to other ROMs. About your tekfwtool error...
by fenugrec
May 22nd, 2018, 7:25 am
Forum: Other or Discontinued Oscilloscopes
Topic: TDS420 Options Possible?
Replies: 17
Views: 10861

Re: TDS420 Options Possible?

nvLibrariansDiag The "Librarians" functions is how these scopes store cal, config and option data in the NVRAM, so this is a good sign - it's the same mechanism as on the later scopes. "Start PowerhOw Diag SAquence ccountant probe routines" they seem to be different every time i start the instrumen...
by fenugrec
May 8th, 2018, 7:01 pm
Forum: Other or Discontinued Oscilloscopes
Topic: TDS420 Options Possible?
Replies: 17
Views: 10861

Re: TDS420 Options Possible?

Code: Select all

-> help
undefined symbol: help
Interesting, so this would be a very limited console. Can you paste the whole output produced by a normal boot ?

Some other commands you could try : "lkup" and "lkAddr 0x1000000", those may help find which other commands are defined.
by fenugrec
April 29th, 2018, 3:49 pm
Forum: Other or Discontinued Oscilloscopes
Topic: TDS420 Options Possible?
Replies: 17
Views: 10861

Re: TDS420 Options Possible?

Igorkasona1233 wrote:
April 29th, 2018, 1:46 pm
I have once tried it over the Serial Port and only a view commands are working like clearing the Log, but all the other ones are not working
To be clear, I meant the serial "service console" connection only accessible inside the unit's case, not the regular RS232 interface on the back panel.
by fenugrec
April 28th, 2018, 6:15 pm
Forum: Other or Discontinued Oscilloscopes
Topic: TDS420 Options Possible?
Replies: 17
Views: 10861

Re: TDS420 Options Possible?

As far as i have look it should be in the NVRAM, Ok i will try to dump the Firmware. It may take a bit until i have dumped it, i think it only works over GPIB not over the serial. I never tried it with my interfaces to do this It *is* possible to dump the firmware over the serial console, but it's ...
by fenugrec
April 28th, 2018, 5:43 pm
Forum: Other or Discontinued Oscilloscopes
Topic: TDS744A Error message digDataFormatDiag
Replies: 10
Views: 6667

Re: TDS744A Error message digDataFormatDiag

digSpeedMemDiag, ERROR !!U206 MemAddr = 0x73a2b2a data = 0x35 exp = 0x25, Interesting, in this case it was able to figure out the error was in U206. It calculated the two digits "06" by doing ((memaddr - 0x7380000 >> 1) & 0x0F) + 1 If we apply the same calculation to your other error at 0x738002c, ...
by fenugrec
April 27th, 2018, 8:12 am
Forum: Other or Discontinued Oscilloscopes
Topic: 2445a with GPIB
Replies: 1
Views: 2407

Re: 2445a with GPIB

Qu66nman wrote:
April 25th, 2018, 10:16 am
Any idea on how to turn off the LOCK mode?
Check for DIP switches at the back of the unit (those that would set the GPIB address), sometimes one of them can set modes like this. Otherwise you might have a more serious problem like the CPU not booting properly.
by fenugrec
April 27th, 2018, 7:57 am
Forum: Other or Discontinued Oscilloscopes
Topic: TDS744A Error message digDataFormatDiag
Replies: 10
Views: 6667

Re: TDS744A Error message digDataFormatDiag

I've just got an old TDS744A me too - what fw version is yours ? ERROR!!in demux 200 ,i= 21 memBaseAdr 0x738002c= data = 200, expectedData[i] = 1200 There might be a service function to loop test a specific address, but I'm not sure. I'll try to check next time I'm looking at the firwmare. The TDS5...
by fenugrec
April 27th, 2018, 7:30 am
Forum: Other or Discontinued Oscilloscopes
Topic: TDS 3054C Front Panel Repair
Replies: 2
Views: 2587

Re: TDS 3054C Front Panel Repair

I looked closely at J700 I noticed there was solder bridging across pins 1 and 2: Certainly looks unusual, but could be normal. You could try removing that solder blob and seeing if there is indeed a trace connecting the two pins anyway, or continuity between them (with the connector unplugged to r...
by fenugrec
April 24th, 2018, 6:10 pm
Forum: Other or Discontinued Oscilloscopes
Topic: TDS-524A NVRAM backup
Replies: 38
Views: 58646

Re: TDS-524A NVRAM backup

An interesting little titbit was that in order for the commands to actually write the value I had to un-write protect the NVRAM. yes, the only way to write to the NVRAM is to un-protect it... find a way to load the factory defaults into NVRAM so I don't keep getting Error log messages every time I ...
by fenugrec
April 24th, 2018, 6:00 pm
Forum: Other or Discontinued Oscilloscopes
Topic: TDS420 Options Possible?
Replies: 17
Views: 10861

Re: TDS420 Options Possible?

Igorkasona1233 wrote:
February 5th, 2018, 7:02 pm
i hope this topic is not redundant, but i have been resceaching if it is possible to recover the lost options in a TDS420.
Most probably. And I'd also bet that they're saved in the NVRAM. If you have a firmware ROM dump I can take a quick look.
by fenugrec
April 12th, 2018, 1:36 pm
Forum: Other or Discontinued Oscilloscopes
Topic: TDS520 problem ( Attn/acq interface )
Replies: 22
Views: 17738

Re: TDS520 problem ( Attn/acq interface )

Good, glad to hear you managed to fix it.
by fenugrec
April 3rd, 2018, 10:52 am
Forum: Other or Discontinued Oscilloscopes
Topic: TDS520 problem ( Attn/acq interface )
Replies: 22
Views: 17738

Re: TDS520 problem ( Attn/acq interface )

This is for U624.7 (CCATN) and U629.5 (ATTNSB)... Not good :( This is the next to must check ( U1324 ) ? U1324 ?? Why ? You checked the inputs of U624 and U629, and they look probably OK. You then checked the outputs of U624 and U629, and they look bad. What are the 2 possibilities that would expla...
by fenugrec
March 30th, 2018, 7:18 pm
Forum: Other or Discontinued Oscilloscopes
Topic: TDS520 problem ( Attn/acq interface )
Replies: 22
Views: 17738

Re: TDS520 problem ( Attn/acq interface )

Element of supply to U629 and U624 is ... ? Do you mean - what pin # are their supplies ? that's in their datasheets; on the schematics too; usually 7 and 14 on 74xxx logic ICs. - where the +5V is generated ? you'll have to look at the pin assignments for the connectors - probably J101. - if you me...
by fenugrec
March 29th, 2018, 4:15 pm
Forum: Other or Discontinued Oscilloscopes
Topic: TDS520 problem ( Attn/acq interface )
Replies: 22
Views: 17738

Re: TDS520 problem ( Attn/acq interface )

michanio91 wrote:
March 28th, 2018, 10:37 am
How i Can look +5.1V and +5V voltage for U624 and U629 ? Which one elements ?
I don't understand your question...
by fenugrec
March 27th, 2018, 8:54 pm
Forum: Other or Discontinued Oscilloscopes
Topic: TDS520 problem ( Attn/acq interface )
Replies: 22
Views: 17738

Re: TDS520 problem ( Attn/acq interface )

Can i try something else ? Yes. Connect to the service console port and look at the output during boot. Are those "pu_diag ..." errors recent ? "pu_" means "power-up" of course, but are you getting a new error on every boot ? Also, to state the obvious, *everything* needs to be connected inside the...
by fenugrec
March 21st, 2018, 9:31 pm
Forum: Other or Discontinued Oscilloscopes
Topic: TDS520 problem ( Attn/acq interface )
Replies: 22
Views: 17738

Re: TDS520 problem ( Attn/acq interface )

ATTNSTRB and CCATTN Those should be 0/5V TTL signals. I think your mini scope settings are wrong : 5us/div is way too fast, and 5mV/div will not show 5V excursions (way off screen). Try maybe 50-300us/div, 2V/div, and turn the scale control back and forth until your mini scope gets a good trigger (...
by fenugrec
March 21st, 2018, 9:18 pm
Forum: Other or Discontinued Oscilloscopes
Topic: 2445A Channel 1 & 2 no Vertical
Replies: 1
Views: 2346

Re: 2445A Channel 1 & 2 no Vertical

Any input on what I need to look at? The schematics, for starters. You're in the lucky position of being able to use ch3/4 to self-troubleshoot the scope ! Apply a signal (cal testpoint on the front panel is perfect) to both one good and one bad channel; follow the signal path and compare identical...
by fenugrec
March 20th, 2018, 2:31 pm
Forum: Other or Discontinued Oscilloscopes
Topic: TDS520 problem ( Attn/acq interface )
Replies: 22
Views: 17738

Re: TDS520 problem ( Attn/acq interface )

Ok, but do you get to the normal display with traces etc ? I have a traces ,but they are bad. Ah. Still, a good place to start. Start by trying the flowchart in the SM page 9-1 "A15 att board programming troubleshooting". Note, you will maybe need a second scope to verify some signals. I dont have ...

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