DC504: Difference between revisions
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{{TM500 | mfg=Tektronix | type=DC504 | function= | {{TM500 | mfg=Tektronix | type=DC504 | function=80 MHz, 5-digit frequency counter | class=counter | image=Tek dc504 on.jpg | introduced=1975 | discontinued=1983 | | ||
designers= |manuals= | designers= |manuals= | ||
* [[Media:070-1670-01.pdf|DC504 | * [[Media:070-1670-01.pdf|DC504 Manual]] (OCR) | ||
}} | }} | ||
It was superseded by the [[DC504A]] in 1984. | |||
{{BeginSpecs}} | {{BeginSpecs}} | ||
{{Spec|Frequency Range | | {{Spec|Frequency Range | DC (AC coupled: 10 Hz) to at least 80 MHz }} | ||
{{Spec|Sensitivity | {{Spec|Sensitivity | 20 mV<sub>RMS</sub> sine wave below 15 MHz, 35 mV<sub>RMS</sub> to 50 MHz, derated down to 175 mV<sub>RMS</sub> at 80 MHz}} | ||
{{Spec|Input impedance| 1 MΩ // 20 pF}} | {{Spec|Input impedance | 1 MΩ // 20 pF}} | ||
{{Spec|Trigger Level Range| −1.5 V to +1.5 V}} | {{Spec|Trigger Level Range | −1.5 V to +1.5 V}} | ||
{{Spec| | {{Spec|Frequency Resolution | kHz ranges: 0.1 Hz; 1 Hz and 10 Hz (7 digit resolution possible in overflow kHz position); MHz ranges: 100 Hz, 1 kHz (9 digit resolution possible in overflow kHz position) }} | ||
{{Spec| | {{Spec|Period resolution | ms ranges: 1 µs, 10 µs; s ranges: 10 ms, 1 ms, 0.1 ms}} | ||
{{Spec|Display Time | Variable ~0.1 s ... ~10 s and HOLD mode}} | |||
{{Spec|Display Time| Variable ~0.1 s ... ~10 s and HOLD mode}} | {{Spec|Standard Time Base | 1 MHz, ±1×10<sup>-5</sup> from 0°C to +50°C, ±1×10<sup>-5</sup> per month, Adjustable to within 1×10<sup>-7</sup>}} | ||
{{ | {{Spec|Opt. 1 Time Base | 5 MHz, ±1×10<sup>-7</sup> from 0°C to +50°C, ±1×10<sup>-7</sup> per month, Adjustable to within 1×10<sup>-9</sup>}} | ||
{{ | |||
{{EndSpecs}} | {{EndSpecs}} | ||
An internal "RPM" mode switch stretches gate times sixfold | An internal "RPM" mode switch stretches gate times sixfold, giving a longest gate time of 1 minute with a display scaled in revolutions per minute. | ||
==Rear Interface== | ==Rear Interface== | ||
Line 44: | Line 36: | ||
* 19A − BCD out 1 | * 19A − BCD out 1 | ||
* 16A − Signal input (GND on 17A) | * 16A − Signal input (GND on 17A) | ||
* 14A − External Clock | * 14A − External Clock (GND on 15A) | ||
==Pictures== | ==Pictures== |
Revision as of 14:28, 24 April 2023
The Tektronix DC504 is a 80 MHz, 5-digit frequency counter plug-in for the TM500 system.
It was superseded by the DC504A in 1984.
Key Specifications
Frequency Range | DC (AC coupled: 10 Hz) to at least 80 MHz |
---|---|
Sensitivity | 20 mVRMS sine wave below 15 MHz, 35 mVRMS to 50 MHz, derated down to 175 mVRMS at 80 MHz |
Input impedance | 1 MΩ // 20 pF |
Trigger Level Range | −1.5 V to +1.5 V |
Frequency Resolution | kHz ranges: 0.1 Hz; 1 Hz and 10 Hz (7 digit resolution possible in overflow kHz position); MHz ranges: 100 Hz, 1 kHz (9 digit resolution possible in overflow kHz position) |
Period resolution | ms ranges: 1 µs, 10 µs; s ranges: 10 ms, 1 ms, 0.1 ms |
Display Time | Variable ~0.1 s ... ~10 s and HOLD mode |
Standard Time Base | 1 MHz, ±1×10-5 from 0°C to +50°C, ±1×10-5 per month, Adjustable to within 1×10-7 |
Opt. 1 Time Base | 5 MHz, ±1×10-7 from 0°C to +50°C, ±1×10-7 per month, Adjustable to within 1×10-9 |
An internal "RPM" mode switch stretches gate times sixfold, giving a longest gate time of 1 minute with a display scaled in revolutions per minute.
Rear Interface
- 28A − Hold
- 28B − Gate Out, Totalize Start/Stop
- 27B − Decimal point
- 26A − /Reset
- 25A − TS1 (digit select 1, MSD)
- 24B − Scan clock out
- 24A − TS2 (digit select 2)
- 23B − Overflow
- 23A − TS3 (digit select 3)
- 22A − TS4 (digit select 4)
- 21B − BCD out 2
- 21A − TS5 (digit select 5, LSD)
- 20B − BCD out 8
- 20A − BCD out 4
- 19B − Latch Out (Data Good)
- 19A − BCD out 1
- 16A − Signal input (GND on 17A)
- 14A − External Clock (GND on 15A)
Pictures
DC504 (1975−1983)
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DC504
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DC504
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DC504
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DC504
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DC504
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DC504
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DC504 inside; component side
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DC504 inside; copper side
DC504A (1984−1993)
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DC504A
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DC504A
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DC504A left internal
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DC504A right internal
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DC504A 3/4 view