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Regarding this pdf of 7000 series currents ..... I am unfamiliar with the terms Foldback currents and ULU. Can some-one please explain??

On Sat, Oct 13, 2018 at 12:22 AM, Craig Cramb wrote: Hi Craig, > > So I would guess that what you are meaning is the internal switch in the PG506 > needs to be set to DC instead of Square Wave. > This

So I would guess that what you are meaning is the internal switch in the PG506 needs to be set to DC instead of Square Wave.

Here is a link to Dr. Holden's very interesting and informative article on this subject: http://worldphaco.com/uploads/TEKTRONIX_2465b_OSCILLOSCOPE_CALIBRATION___REPOWERING_THE_DS1225.pdf

Thanks for that, Chuck Raymond

Thank you, Chuck, for clarifying that the calibrator output is 0V to requested level positive 1KHz. Then it seems that I've done nothing wrong till now. But was defeated by LIMIT problem. I'll try

Not that it matters much, but Tektronix used the 68B02 microprocessor here, rather than the 6502. They are both substantially similar, and there are quite good assemblers and disassemblers available

Dear All, Free to a good home, to be collected in Cirencester UK. 7704A 4 slot mainframe. It lights up but the intensity is playing up a bit so some TLC is required. I do not have the time to

The signals from the PG506, while in calibrate voltage mode are all 0 to whatever positive volts... not bipolar. The calibration routine CAL02 does *n0t* always tell you about an out of range

OOPS! See typo below: Chuck Harris wrote: ^ 10^14

Their web sites shows availability but their checkout system is disabled. I called the phone number, and was told to enter the info into Ebay, and it would show up if they still had stock, which they

Does this help? https://www.surplusselect.com/products/up-to-2-new-tektronix-integrated-circuits-155-0004-01

I have two 576 Curve Tracers. One has everything working perfectly and the other has readout problems in the Beta display. I have two BAD and one good 155-0004-01 ICs. I know the problem is this part

Chuck, I've noticed too the same weird behavior of the pots on the front panel. It's like the FW value isn't synchronized to the real pot position unless the whole CW-CCW-desired position swing could

Alas, I don't use my 2465As or 2465s anymore.....gone digital etc. I keep them as I used to dream of owning them back as an undergrad. Used PDP 11, Commodore 64, Atari ST, Amiga 4000 back in the days

Hugo Holden did a quick calculation using his logic analyzer, and the FRAM datasheet, and came up with the following: Ramtron claims the FM16W08 cells should operate for 10^14 R/W cycles. The life

On Fri, Oct 12, 2018 at 04:34 PM, Chuck Harris wrote: Hi Chuck, You're writing: > > 99% (hopeless exaggeration) of the NVRAM is not calibration > constants, but rather operating memory for the 6802.

The DAC outputs differential currents, which are converted to voltages across R2520 and R2521. The centerpoint of those two is the 1.36V reference, which itself is derived from the DAC through U2521,

Consider what you guys routinely do to your scopes in the name of repair/restoration/polishing, and then think on the value of your NVRAM's contents: 1) replace burned out attenuators, and vertical

Wouldn't it be nice to have a copy of the source for that code. It would be fun to fix those things. Regards