It should be as accurate as the 7L13 instrument itself. Note however that given their age, each 7L13 today most likely requires full calibration to achieve the factory specs. I had to calibrate mine,

I've done this trick with two timebases in my 7854 to display the vintage MDA (Hercules monochrome) PC graphics card output on the scope CRT. It is readily doable, but tricky due to the following: - T

I don't have the original PDF, but I compiled and posted instructions some time ago on the group in a thread named "DC508A Option 7 installation guide": https://groups.io/g/TekScopes/message/167339 Ph

Hi Holger, Nice work, I'm always pleased to see new gadgets bridge the gap between the modern and the vintage. I invested effort into writing software that lets you connect the 7854 to the modern PC u

Hi Everybody, 7854 is too awesome to retire just yet. It's unique digital features were not easy to access from the outside for a long time due to expensive GPIB hardware and lack of software support

Hi Dennis, I'm glad you're OK and back with us. I second everything the rest of the group has said, especially the invitation to reach out. I hope the number of replies in this thread is enough of a p

Hi Dennis, First of all I'm glad that Marian had a successful operation and is recovering well. All the best wishes to you and your family from the other side of the Planet. Regarding mail bouncing, o

No precursor, I'm just stunned by the winning bid of over $500. Nenad F.

I'd appreciate the enlightenment why somebody dished out >$500 for a PG506: https://www.ebay.co.uk/itm/Tektronix-PG-506-Calibration-Generator-/224356816953 A few months ago I was the second highest bi

Hi Atilio, Not on my unit, at least one zero should be lit. Without signal, the number of (zero) digits lit and decimal point position depends on the averaging setting (AVGS). Changing AVGS also affec

Hi Bob, You did not mention using any termination in your setup. Your HP 8657B performance is specified only if terminated with 50Ohm. Even if you did use an external 50Ohm terminator with your Tek 24

Hi Jeff, 5103N appears to be only the module mainframe, separate from the CRT unit. However I found the CRT circuit to be similar (if not identical) among the 5000 series models, so no problem there.

Hi Dennis, I believe it's not worth the effort, I'd personally build a new one using instructions from Sam's Laser FAQ: https://www.repairfaq.org/sam/laserhps.htm#hpstoc You'll find wealth of informat

Hi Chuck, Yes, I agree we derailed the subject by going deep into the cathode issues, but I still instinctively believe that double peaking explanation may be within grasp (without major research). Un

Perhaps my statement wasn't precise enough, I meant to say "if the interface layer was behind the double peaking phenomenon...", not question the interface layer existence per se. Oxide cathode is so

If the "interface layer" theory was true then the same negative resistance phenomenon would also be observable in conventional tubes. Personally I've never seen one behave like that, although I curve

The eBay ad is a mess but the device is decent, well worth it but won't do wonders for $20. It's a white noise source, just a plain Zener diode hooked to a wideband amplifier. Reference (average) leve

I've got one very much like this: https://www.ebay.com/itm/0-2-2000M-Noise-Signal-Generator-Simple-Spectrum-Tracking-Source-High-Flatness/174453557146 It's reasonably flat and worth the price. You mig

Using 7L* SAs in 7854 is a song. It's not just the digital storage, it's the averaging that can significantly help smooth the measurement and increase your SNR. I do it all the time with my 7L5 and al

Hi Everybody, Inspired by recent talk of the admirable 500 series, I'd like to share my story and some questions that keep bugging me. I'm in Eastern Europe. A month ago a local trader in scavenged EE