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{{TM500 | mfg=Tektronix | type=DC503A | function=100 MHz, 7-digit frequency counter | class=counter | image=Tek dc503a on.jpg | introduced=1981 | discontinued=1993 | |||
|designers=Roland Crop;Jim Geddes | |||
|manuals= | |||
* [[Media:070-2971-00.pdf|DC503A Manual]] (OCR) | |||
* [[Media:TM_9-6625-474-14.pdf|DC503A Military Manual]] | |||
}}. It replaced the [[DC503]] in 1981. | |||
[ | {{BeginSpecs}} | ||
{{Spec | Frequency Range | 0 Hz (AC coupled: 10 Hz) to ≥125 MHz }} | |||
{{Spec | Impedance | 1 MΩ paralleled by approx. 27pF}} | |||
{{Spec | Sensitivity | 20 mV<sub>RMS</sub> sinewave to 100 MHz, 35 mV<sub>RMS</sub> sinewave to 125 MHz }} | |||
{{Spec | Max Input Voltage | 1× Atten: 200 V<sub>peak</sub>, 400 V<sub>p-p</sub> @ DC − 50 kHz; 200 V<sub>peak</sub>, ≤(20/f) V<sub>p-p</sub> @ 50 kHz − 1.33 MHz; 200 V<sub>peak</sub>, ≤15 V<sub>p-p</sub> @ 1.33 – 125 MHz }} | |||
{{Spec | Max Input Voltage | 5× Atten: 200 V<sub>peak</sub>, 400 V<sub>p-p</sub> @ DC − 5 MHz; 200 V<sub>peak</sub>, ≤(2000/f) V<sub>p-p</sub> @ 5 − 100 MHz; 200 V<sub>peak</sub>, ≤20 V<sub>p-p</sub> @ 100 – 125 MHz }} | |||
{{EndSpecs}} | |||
==Links== | |||
* [https://www.youtube.com/watch?v=LKyo1sXVjpk Tektronix DC503A Frequency Counter OCXO Mod] by NFM @ YouTube | |||
{{Documents|Link=DC503A}} | |||
==Pictures== | |||
<gallery> | |||
dc503a.jpg | DC503A | |||
Tek dc503a on.jpg|DC503A | |||
Tek dc503a left internal.jpg|DC503A left internal | |||
</gallery> | |||
==Components== | |||
{{Parts|DC503A}} |