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* [http://w140.com/smb/DD501_SM.pdf Tektronix DD501 Manual (OCR, PDF)] | * [http://w140.com/smb/DD501_SM.pdf Tektronix DD501 Manual (OCR, PDF)] | ||
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It provides "delay by events", producing a trigger output pulse after a selectable number (0 − 99,999) of input trigger events. | |||
== | {{BeginSpecs}} | ||
{{Spec|Event count|0 to 99,999 }} | |||
{{Spec|Max. count rate|80 MHz}} | |||
{{Spec|Insertion delay|≤ 30 ns}} | |||
{{Spec|Recycle time|≤ 25 ns}} | |||
{{Spec|Min. detectable pulse| ≥ 5 ns}} | |||
{{Spec|Input impedance|1 MΩ // 20 pF}} | |||
{{Spec|Input sensitivity|85 mV<sub>p-p</sub> up to 80 MHz, selectable + or − slope}} | |||
{{Spec|Trigger level|± 1 V}} | |||
{{Spec|Trigger view output| ≥ 0.5 V}} | |||
{{Spec|Output|Events pulse width plus 6 ns or less, TTL level (<0.8 V / >2.0 V) into three standard TTL loads}} | |||
{{EndSpecs}} | |||
==Prices== | |||
{| class="wikitable" | |||
|- | |||
! Year | |||
! 1975 | |||
! 1980 | |||
! 1985 | |||
! 1990 | |||
|- | |||
! Catalog price | |||
|align=right| $495 | |||
|align=right| $850 | |||
|align=right| $1,385 | |||
|align=right| $2,295 | |||
|- | |||
! 2018 value | |||
|align=right| $2,300 | |||
|align=right| $2,570 | |||
|align=right| $3,210 | |||
|align=right| $4,380 | |||
|- | |||
|} | |||
==Pictures== | ==Pictures== |