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DC508A: Difference between revisions
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{{TM500 | mfg=Tektronix | type=DC508A | function=1.3 GHz counter | class=counter | image=Tek sw503 dc502 sg504 dc508a mr501 tm515.png | introduced=1980 | discontinued=1983 | |||
{{TM500 | mfg=Tektronix | type=DC508A | function=1.3 GHz counter | class=counter | image=Tek sw503 dc502 sg504 dc508a mr501 tm515.png | introduced=1980 | discontinued=1983 | designers= |manuals= | |designers= | ||
|manuals= | |||
* [[Media:070-3638-00.pdf|DC508A Manual]] (OCR) | |||
}} | }} | ||
It replaced the previous [[DC508]] version (1978), extending the frequency range to 1.3 GHz. | |||
{{BeginSpecs}} | |||
{{Spec | Frequency Range | 0–100 MHz direct (15 mV<sub>RMS</sub>, 1 MΩ // 25 pF), gate times 1 ms to 10 s in decade steps; 100 MHz – 1.3 GHz via prescaler (20 mV<sub>RMS</sub>, 50 Ω input, fused), gate times 8 ms to 8 s in decade steps }} | |||
{{Spec | Resolution | 9 digits }} | |||
{{Spec | Functions | Frequency, events }} | |||
{{EndSpecs}} | |||
[[ | ===Options=== | ||
* Option 1 − High accuracy time base | |||
* Option 7 − Accepts rear panel control signals from a [[TR502]] or [[SW503]] to measure a marker frequency. Resolution and gating remote control circuitry is added to the DC508(A). Requires a [[TM503|TM503 - option 7]] or an appropriately modified mainframe. This option inherently also adds option 1. | |||
==Links== | |||
* [https://www.amplifier.cd/Test_Equipment/Tektronix/Tektronix_500/DC508.htm Tek DC508 page @ amplifier.cd] | |||
{{Documents|Link=DC508A}} | |||
{{PatentLinks|DC508A}} | |||
==Internals== | |||
The DC508A uses an off-the-shelf divide-by-4 counter ICs as the prescaler, a [[Plessey SP8611B]] (Tek part number 156-1302-01), which is rated to 1.5 GHz. | |||
==Pictures== | |||
<gallery> | |||
Tek sw503 dc502 sg504 dc508a mr501 tm515.png|DC508A in [[TM515]] with other TM500 gear | |||
</gallery> | |||
{{BetterPics}} | |||
==Components== | |||
{{Parts|DC508A}} | |||