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{{TM500 | mfg=Tektronix | type=SC504 | function=80 MHz dual-channel oscilloscope | class=oscilloscope | image=Tek_sc504_3.jpg | introduced=1978 | discontinued=1993 | | {{TM500 | mfg=Tektronix | type=SC504 | function=80 MHz dual-channel oscilloscope | class=oscilloscope | image=Tek_sc504_3.jpg | introduced=1978 | discontinued=1993 | an=an | | ||
manuals= | designers= |manuals= | ||
* [ | * [[Media:070-2296-00.pdf|Tektronix SC504 Manual]] (PDF) | ||
* [[Media:TB-9-6625-2173-35.pdf|US Army Calbration Guide for SC501, SC502, and SC504 (PDF)]] | |||
* [[Media:TM-9-6695-246-34P.pdf|TM-9-6695-246-34P Parts List]] | * [[Media:TM-9-6695-246-34P.pdf|TM-9-6695-246-34P Parts List]] | ||
}} | }} | ||
{{BeginSpecs}} | |||
{{Spec | Bandwidth | 80 MHz (derated to 70 MHz from 35 °C to 50 °C ambient), 10 Hz AC coupling cutoff }} | |||
[[ | {{Spec | Rise time | 4.4 ns (derated to 5.0 ns from 35 °C to 50 °C ambient) }} | ||
{{Spec | Deflection | 5 mV/Div to 10 V/Div, 1−2−5, and ×2.5 variable; max. input 250 V (DC coupled), 400 V (AC) }} | |||
{{Spec | Sweep | 50 ns/Div to 200 ms/Div, 1−2−5; variable ×2.5 (to at least 0.5 s/Div); ×10 magnifier }} | |||
{{Spec | Trigger | 0.4 div or 60 mV, DC to 30 MHz; 1.5 div or 150 mV, 30 MHz to 80 MHz; AC coupling >50 Hz; AC LF REJ >10 kHz; HF REJ <50 kHz }} | |||
{{Spec | Input impedance | 1 MΩ // 20 pF }} | |||
{{Spec | Ext Trig Input | 1 MΩ // 24 pF (750 kΩ // 28 pF when not selected), max. 250 V DC+peak AC) }} | |||
{{Spec | CRT | 8×10 divisions of 6.35 mm (0.25") each; 12 kV acceleration, P31 phoshor; [[154-0730-05]] tube }} | |||
{{Spec | Calibrator | 0.6 V<sub>p-p</sub> @ 1 kHz }} | |||
{{Spec | Power | approx. 26 W operating, <1 W in standby }} | |||
{{Spec | Features | 1-or 2-channel (chop/alt), Add (1+2), Subtract (1-2), X-Y mode (2 MHz, <3° to 50 kHz), single sweep }} | |||
{{EndSpecs}} | |||
==Links== | ==Links== | ||
* [http://k6jca.blogspot.com/2017/12/repair-log-tektronix-sc-504-oscilloscope.html Repair Log: Tektronix SC-504 Oscilloscope] (K6JCA) | |||
* [http://www.barrytech.com/tektronix/tektm500/teksc504.html SC504 @ barrytech.com] | * [http://www.barrytech.com/tektronix/tektm500/teksc504.html SC504 @ barrytech.com] | ||
==Rear interface== | |||
The SC504 has dedicated rear interface signal inputs switchable from the front panel AC/DC/GND/Int DC coupling selectors. These are terminated in 50 Ω (max. 5 V<sub>RMS</sub>, 0.5 W). | |||
Additionally, it provides a trigger input, Z-axis input (±5 V), delayed gate input (ECL), gate select input (ground for ext gate), intensify input (ECL), Ch1 trigger output (>50 mV/Div, 30 MHz), triggered gate output (ECL), holdoff output (ECL), ramp output (0−10 V), sweep reset input, ready light output, and +5 V. | |||
==Internals== | |||
A slide switch under the right side cover allows the variable sweep control to be used as a variable holdoff control instead. | |||
The SC504 uses some custom Tek ICs, namely the [[155-0124-00]] preamplifier (U4345), [[155-0109-01]] trigger (U3238), and [[155-0122-00]] A-B logic (U3158). There are two passive input attenuator hybrids (HY1520, HY1420) and two [[155-0161-00]] attenuator/amplifier hybrids (HY1530, HY1430). | |||
The power supply uses the pass transistors provided by the two mainframe slots that the SC504 covers. | |||
Those on the right slot provide ±20 V from the mainframe's ±33.5 V rails, those on the left slot make +5 V from the +11.5 V rail and −5 V from the rectified 17 V<sub>AC</sub> supply. Power is drawn from the right mainframe slot, the pass transistors are the only connections on the left slot. | |||
==Pictures== | ==Pictures== | ||
<gallery> | <gallery> | ||
Tek sc504 1.jpg | Tek sc504 1.jpg | front panel | ||
Tek sc504 2.jpg | Tek sc504 2.jpg | in operation (2ch) | ||
Tek sc504 3.jpg | Tek sc504 3.jpg | in operation | ||
Tek sc504 4.jpg | Tek sc504 4.jpg | top | ||
Tek sc504 5.jpg | Tek sc504 5.jpg | right | ||
Tek sc504 6.jpg | Tek-sc504-right.jpg | right interior | ||
Tek sc504 7.jpg | Tek sc504 6.jpg | left | ||
Tek sc504 8.jpg | Tek-sc504-left.jpg | left interior | ||
Tek sc504 front.JPG | Tek sc504 7.jpg | bottom | ||
Tek sc504 and SAFT.jpg|SC504 with non-Tek plug-ins | Tek-sc504-bottom.jpg | bottom interior | ||
Tek sc504 with fg501.jpg | Tek sc504 8.jpg | rear | ||
Tek sc504 front.JPG | in operation | |||
Tek sc504 and SAFT.jpg | SC504 with non-Tek plug-ins | |||
Tek sc504 with fg501.jpg | SC504 with [[FG501]] | |||
Tek-sc504-am503.jpg | SC504 with [[AM503]] in [[TM503]] | |||
</gallery> | </gallery> | ||
{{Custom ICs|SC504}} | |||