31,810
edits
82: Difference between revisions
no edit summary
No edit summary |
No edit summary |
||
| Line 10: | Line 10: | ||
a low controlled impedance (93 ohms), as opposed to other 500-series scopes | a low controlled impedance (93 ohms), as opposed to other 500-series scopes | ||
that present a high impedance to the plug-in. | that present a high impedance to the plug-in. | ||
Stan Griffiths wrote: | |||
<blockquote> | |||
If you feed [a fast risetime] signal into an early type 82, you will | |||
find that the top three least sensitive positions have really terrible frequency | |||
response . . . so bad, in fact, that some customers thought they were broken. | |||
When told this was normal, these customers wondered why Tek ever included them | |||
on the plugin. The answer was that they were still useful for low frequency | |||
signals . . . but Tek never really made it well known that these 82 attenuator | |||
positions were lousey. I think this was fixed on the later 82's as Tek learned | |||
how to make better attenuators. If you have an early 82 and need to look at | |||
high frequency signals on the less sensitive ranges, the answer is to get X100 | |||
probes and use them on the more sensitive ranges where the frequency response is | |||
better. | |||
</blockquote> | |||
* [http://w140.com/tek-82.pdf Tektronix Type 82 Manual (PDF)] | * [http://w140.com/tek-82.pdf Tektronix Type 82 Manual (PDF)] | ||