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DC509: Difference between revisions
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It is internally similar to the [[DC5009]] to which it could be converted through an upgrade kit. | It is internally similar to the [[DC5009]] to which it could be converted through an upgrade kit. | ||
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The DC509 uses reciprocal counting with an internal 100 MHz clock phase-locked to the reference oscillator. | |||
An R6504 microprocessor (28-pin variant of a [[6502]] with 8K addressable memory) performs the calculations. | |||
Opt.01 is an OCXO for improved stability. | |||
{{BeginSpecs}} | |||
{{Spec | Frequency | ≤100 μHz to ≥135 MHz (Ch B in Ratio: ≥125 MHz) }} | |||
{{Spec | Time A-B | ≤15 ns to ≥3.05 hours }} | |||
{{Spec | Single shot resolution | 10 ns }} | |||
{{Spec | Totalize | 2<sup>40</sup counts (1.09 × 10<sup>12</sup>) }} | |||
{{SpecGroup | Standard time base }} | |||
{{Spec | Frequency | 10 MHz ± 1 × 10<sup>-7</sup> at cal }} | |||
{{Spec | Error | ≤ ±5 × 10<sup>-6</sup> from 0 °C to +50 °C }} | |||
{{Spec | Aging | ≤ ±1 × 10<sup>-6</sup> per year }} | |||
{{SpecGroup | Opt.01 OCXO time base }} | |||
{{Spec | Frequency | 10 MHz ± 2 × 10<sup>-8</sup> at cal }} | |||
{{Spec | Error | ≤ ±2 × 10<sup>-7</sup> from 0 °C to +50 °C (after oven warm-up) }} | |||
{{Spec | Aging | ≤ ±1 × 10<sup>-8</sup> per day }} | |||
{{EndSpecs}} | |||
==Links== | ==Links== | ||