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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. There is a benchtop version, | ||
the 181, and a rackmount version, the RM181. | 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 | |||
frequency stability in a 24 hour period, the same stability as the [[180A]]. | |||
* [http://manoman.sqhill.com/pdf/tek-181.pdf Tektronix 181 Manual (PDF)] | * [http://manoman.sqhill.com/pdf/tek-181.pdf Tektronix 181 Manual (PDF)] |