DD501

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The Tektronix DD501 is a digital delay plug-in for the TM500 system.

It provides "delay by events", producing a trigger output pulse after a selectable number (0 − 99,999) of input trigger events.

Key Specifications

Event count	0 to 99,999
Max. count rate	80 MHz
Insertion delay	≤ 30 ns
Recycle time	≤ 25 ns
Min. detectable pulse	≥ 5 ns
Input impedance	1 MΩ // 20 pF
Input sensitivity	85 mVp-p up to 80 MHz, selectable + or − slope
Trigger level	± 1 V
Trigger view output	≥ 0.5 V
Output	Events pulse width plus 6 ns or less, TTL level (<0.8 V / >2.0 V) into three standard TTL loads

Prices

Year	1975	1980	1985	1990
Catalog price	$495	$850	$1,385	$2,295
In 2023 Dollars	$2,800	$3,200	$3,900	$5,400

Pictures

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Components

Some Parts Used in the DD501

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