SC504: Difference between revisions
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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 | | ||
designers= |manuals= | designers= |manuals= | ||
* [[Media:070-2296-00.pdf|Tektronix SC504 Manual]] (PDF) | * [[Media:070-2296-00.pdf|Tektronix SC504 Manual]] (PDF) | ||
Revision as of 12:48, 26 December 2021
The Tektronix SC504 is an 80 MHz dual-channel oscilloscope plug-in for the TM500 system.
Key Specifications
| Bandwidth | 80 MHz (derated to 70 MHz from 35 °C to 50 °C ambient), 10 Hz AC coupling cutoff |
|---|---|
| Rise time | 4.4 ns (derated to 5.0 ns from 35 °C to 50 °C ambient) |
| Deflection | 5 mV/Div to 10 V/Div, 1−2−5, and ×2.5 variable; max. input 250 V (DC coupled), 400 V (AC) |
| Sweep | 50 ns/Div to 200 ms/Div, 1−2−5; variable ×2.5 (to at least 0.5 s/Div); ×10 magnifier |
| 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 |
| Input impedance | 1 MΩ // 20 pF |
| Ext Trig Input | 1 MΩ // 24 pF (750 kΩ // 28 pF when not selected), max. 250 V DC+peak AC) |
| CRT | 8×10 divisions of 6.35 mm (0.25") each; 12 kV acceleration, P31 phoshor; 154-0730-05 tube |
| Calibrator | 0.6 Vp-p @ 1 kHz |
| Power | approx. 26 W operating, <1 W in standby |
| Features | 1-or 2-channel (chop/alt), Add (1+2), Subtract (1-2), X-Y mode (2 MHz, <3° to 50 kHz), single sweep |
Links
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 VRMS, 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 VAC supply. Power is drawn from the right mainframe slot, the pass transistors are the only connections on the left slot.
Pictures
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front panel
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in operation (2ch)
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in operation
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top
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right
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right interior
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left
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left interior
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bottom
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bottom interior
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rear
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in operation
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SC504 with non-Tek plug-ins
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SC504 with FG501
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Custom ICs used in the SC504
| Page | Model | Part nos | Description | Designers | Used in |
|---|---|---|---|---|---|
| 155-0109-00 | M120B | 155-0109-00 • 155-0109-01 | trigger | Gary Vance | 5B25N • 5B31 • 5B40 • 5B42 • 5B44 • 5S14N • 7B50A • 7B53A • 7B80 • 7B85 • 7B87 • 7B81P • 7B90P • 7S14 • 7612D • SC502 • SC503 • SC504 |
| 155-0122-00 | M132A | 155-0122-00 | sweep control | Larry Gagliani | 455 • SC503 • SC504 |
| 155-0124-00 | M138 | 155-0124-00 | horizontal preamplifier | Bob Nordstrom | 455 • SC503 • SC504 • 2221 • 2230 • 2232 • 2336 • 2337 |
| 155-0161-00 | H616 | 155-0161-00 | attenuator and amplifier | SC504 |