User:Peter: Difference between revisions

Revision as of 09:39, 21 September 2023

Hi, my name is Peter (who would have guessed?). I was born and live in Austria. Originally an EE, my current day job is in IT, in an international environment.

The first Tek I worked with – around 1982 IIRC – was a T912 "vacuum cleaner" which I must say left me slightly underimpressed compared with my favourites at the time, the HP 1740 series. For budget reasons, the first scope I bought for myself was a rather pedestrian circa-1986 Hitachi 100 MHz 2-ch portable (a la 465). It did pay for itself through a consulting assignment (2nd generation products of this effort are still in service), but I learned only some time later what the difference between a passable scope like that and a decent scope was, when I compared them side by side in overdrive ...

The first Tek scope in my own possession was the 7613 pictured below, which I bought in early 2014. Looking for manuals (its power supply needed some TLC), I found TekWiki. The resurrected 7613 did not remain alone for long – see below for the current inhabitants of Tek Sanctuary Central Europe.

On this Wiki, Kurt created an account for me in May 2014. I started to add a few photos and some data, then began building categories and some templates. In June of that year, Kurt already gave me admin rights, thanks for the trust! One thing led to another ... having been familiar with Mediawiki (I set up a corporate Intranet with it in 2006 that is still in use), I started getting involved in this site's software side as well, and over the years helped expand its coverage a bit. Feel free to contact me if you have questions about the Cargo database module, for example.

You can also find me as Peter7000 over at Wellenkino.

Cheers

--Peter

Scopes

213
310A
465 − from the estate of a hobbyist
502 − spent many years in a university lab attached to strain gages watching metal samples being broken, at the end reduced to be a DSO pre-amp
511AD − from a physics institute in Slovenia
545A − from a guy with a remarkable collection of early radios and phonographs
549 − looted for tubes by some Bavarian vulture, restored & nursed back to health by Matt, additional minor repairs in my shop
585 − another university retiree
2230 − this one had been working on the railroad ...
7503 − worked in a plasma physics lab, then moved to the physics dept at a smaller university
7603 (2) − one cured of GHz oscillations but infested with cabling gremlins, the other barely survived rough handling
7613 − my first 7k Tek
7623A
7633 − supposedly from a private museum
7844 − my #1 go-to scope
7854 − in great shape
7904 (2) - worked for some time, PSU to be repaired
7104 − tube worn but in decent shape overall
SC504

Other Instruments

308 − nobody else would pick it up at that hamfest
Sony/Tek-branded AFG320

Carts, Cameras etc.

Plugins

500 7000

S

TM500

Probes

Other

1103 Probe power supply, front panel

Screen shots

Faster-than-light beam on 7104? Using a 067-0587-02 calibration fixture at maximum amplitude produces this trace spanning 1.2 Div horizontally at 200 ps/Div and 8 Div vertically. Trace length is (1.2² + 8²)^½ × 8.5 mm = 68.8 mm, travelled in 1.2 × 200 ps = 240 ps. Apparent speed is therefore 68.8×10^-3 / 240×10^-12 m/s or 2.86×10⁸ m/s. Very near miss ...
7104 rise time measurement. 150 ps risetime pulse from 067-0587-02 at 100 Hz repetition rate. Measured 240 ps (corrected for 150 ps fixture rise time: 190 ns = 1.8 GHz)
7104 rise time measurement as before, 1000 Hz repetition rate at same brightness settings.
7104 recording a single shot pulse (from 067-0587-02) at 200 ps/Div. Camera: Nikon D7000, 50 mm f/1.4, ISO 3200, 1/2 s. CRT filter not removed.
7104 recording 1 GHz sine, single shot at 500 ps/Div. Camera: Nikon D7000, 50 mm f/1.4, ISO 3200, 1/2 s. CRT filter not removed. CRT amplification loss is evident around the center line.
BC337 on 7CT1N
P6202 rise time measured with 7S12, S-4, S-52
P6202 rise time measured with 7S12, S-4, S-52
P6230 Rise time measured on a 7S12 with S-52 and S-4 heads, P6230 ground sleeve connected directly at S-52 output (no ground lead)
P6230 Rise time without ground lead: 9.2 * 20 ps = 184 ps (equiv. to 1.9 GHz bandwidth)
P6230 Rise time - Effect of using the "low inductance" ground lead - rise time 400 ps, bandwidth 875 MHz
P6230 Rise time - Using the 250 mm alligator ground lead - severe pulse distortion, rise time ~3 ns (115 MHz)!
A 7B92A (B098xxx) displaying a 1.01 GHz sine in HF Sync mode (7904 mainframe, 7A19 amplifier)
A 7B92A (B098xxx) triggering a 974 MHz sine applied via 067-0587-02 calibration fixture (7904 mainframe)
Classic readout board diagnostic display
Tektronix 067-0587-02, gain mode, in horizontal slot
Tektronix 067-0587-02, gain mode, in vertical slot
7D14 screen picture - 500 MHz signal (7A19, 7B92A, 7904)
7B85 used for rise time measurement
7B85 used for rise time measurement
7B85 used for pulse width measurement
7B85 used for pulse period measurement
7B85 used for pulse period measurement
7S11/7T11, 1 GHz sine, smooth mode, on variable-persistence storage scope (7613)
7S11/7T11, 1 GHz sine, smooth mode
7S11/7T11, 1 GHz sine, normal mode
7S11/S-4 and 7T11A displaying 1 GHz sine
7S12 as a sampler displaying a 1 GHz signal (hi-res mode / storage)
7S12 as a sampler displaying a 1 GHz signal (hi-res mode / storage)
7S12 as a sampler displaying a 1 GHz signal (normal mode / non-storage)
7S12 displaying the incident pulse from an S-52 (nom. < 25 ps) through an S-6 head (nom. < 30 ps)
7S12/S-6/S-52 "Self Portrait" - pulse reflected on S-6 "through" path (approx. 120 ps one way)
Full pulse pattern of a 7S12/S-52 in real time (top trace) and sampled (bottom trace) shown simultaneously on 7844. 7S12 trace at slowest possible sweep.
S-52 pulse in real time (top trace) and sampled (bottom trace) shown simultaneously on 7844. Approximately equal time scales.
15 μV_p-p triangle wave measured through 7A22. Using variable-persistence storage mode on a 7613 for noise filtering
sub-millivolt triangle signal displayed through 7A22, BW=1 kHz
sub-millivolt triangle signal displayed through 7A22, BW=10 kHz
sub-millivolt triangle signal displayed through 7A22, BW=100 kHz
sub-millivolt triangle signal through 7A22, BW=1 MHz
P6022 / passive term. @ 10 mA/Div (top) vs. P6021+134 (bottom), sawtooth @ 100 mA_p-p, 100 Hz
P6022 / passive term. @ 10 mA/Div (top) vs. P6021+134 (bottom), sawtooth @ 100 mA_p-p, 1 kHz
P6022 / passive term. @ 10 mA/Div (top) vs. P6021+134 (bottom), sawtooth @ 100 mA_p-p, 10 kHz
Measuring diode reverse recovery
Diode reverse recovery, 20 mA/Div
Tunnel diode quick check example using the method from Service Scope 49. Right beam is zoomed with delayed timebase to show step speed.
7A29 rise time (7104, 7B10, pulse from S-52)
308 display, timing mode (binary counter example)
308 display, state mode (binary counter example)

@@ Line 1: / Line 1: @@
 Hi, my name is Peter (who would have guessed?). I was born and live in Austria.  Originally an EE, my current day job is in IT, in an international environment.
-The first Tek I worked with – around 1982 IIRC – was a [[T912]] "vacuum cleaner" which I must say left me slightly underimpressed at the time, compared with my favourites at the time, the HP 1740 series.
+The first Tek I worked with – around 1982 IIRC – was a [[T912]] "vacuum cleaner" which I must say left me slightly underimpressed compared with my favourites at the time, the HP 1740 series.
 For budget reasons, the first scope I bought for myself was a rather pedestrian circa-1986 Hitachi 100 MHz 2-ch portable (a la [[465]]).
 It did pay for itself through a consulting assignment (2nd generation products of this effort are still in service),