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181: Difference between revisions
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The Tektronix Type 181 is a time mark generator [[introduced in 1955]]. There is a benchtop version, | The Tektronix Type 181 is a time mark generator [[introduced in 1955]]. There is a benchtop version, | ||
the 181, and a rackmount version, the RM181. MOD 110 substitutes a oven-stabilized | the 181, and a rackmount version, the RM181. MOD 110 substitutes a oven-stabilized | ||
1MHZ crystal oscillator, the CO181, thereby achieving | 1MHZ crystal oscillator, the CO181, thereby achieving 2 parts per million | ||
frequency stability in a 24 hour period, the same stability as the [[180A]]. | frequency stability in a 24 hour period, the same stability as the [[180A]]. | ||