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181: Difference between revisions
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The Tektronix Type 181 is a time mark generator. 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 adds a temperature-stabilized | the 181, and a rackmount version, the RM181. MOD 110 adds a temperature-stabilized | ||
oven for the 1MHZ crystal oscillator, thereby achieving 3 parts per million | oven for the 1MHZ crystal oscillator, thereby achieving 3 parts per million | ||