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(New page: The Tektronix Type 280 Trigger Countdown Unit takes in a periodic signal between 50MHz and 5GHz and puts out a pulse in the 15 to 45 MHz range. The main purpose of the 280 is to extend th...) |
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The Tektronix Type 280 Trigger Countdown Unit takes in a | The Tektronix Type 280 Trigger Countdown Unit takes in a signal with repetition rate 50MHz and 5GHz | ||
and puts out a pulse in the 15 to 45 MHz range. The main purpose of the 280 is to extend the | and puts out a pulse train with repetition rate in the 15 to 45 MHz range. | ||
The main purpose of the 280 is to extend the | |||
frequency range of the the trigger circuitry in sampling scopes. For example, consider a scope | frequency range of the the trigger circuitry in sampling scopes. For example, consider a scope | ||
with a [[3T77]] and a [[3S2]] with [[S2]] sampling heads. The S2 has response to at least 4GHz | with a [[3T77]] and a [[3S2]] with [[S2]] sampling heads. The S2 has response to at least 4GHz | ||
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* [http://bama.edebris.com/download/tek/280/Tek%20280.pdf Tektronix 280 Manual (PDF)] | * [http://bama.edebris.com/download/tek/280/Tek%20280.pdf Tektronix 280 Manual (PDF)] | ||
<gallery> | |||
Image:Tek 280 schem.png | |||
</gallery> | |||