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465M: Difference between revisions
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The 465M is essentially a 100MHz bandwidth scope in a 455 | The 465M is essentially a 100MHz bandwidth scope in a the cabinet of a [[455]]. | ||
The construction methods of the 455, 465M and the T900 series are similar. | The construction methods of the 455, 465M and the [[900-series_scopes|T900 series]] are similar. | ||
In contrast to typical 400-series portable scopes, | |||
which | which use socketed semiconductors, the 465M's semiconductors are soldered in place. | ||
In theory, this gives the 465M a reliability advantage. | |||
The front panel layout of the 465M is | The front panel layout of the 465M is | ||
nearly identical in appearance and function | nearly identical in appearance and function | ||
to that of the 465. | to that of the 465. | ||
Since the vertical preamplifier and trigger/sweep unit | |||
are plug- | are implemented as plug-in modules, one might guess | ||
that there would be other implementations of those functions, | that there would be other implementations of those functions, | ||
there | but there weren't. | ||
What you see is what was made. | What you see is what was made. | ||
There never was a single-channel or single timebase module made, | There never was a single-channel or single timebase module made, | ||
although some may have been originally on the drawing board. | although some may have been originally on the drawing board. | ||
Whether or not | Whether or not the 465M was more rugged than the original 465 is unknown. | ||
In the Oklahoma City Tektronix Service Center, | In the Oklahoma City Tektronix Service Center, | ||
a lot of 465Ms came in for warranty service, | a lot of 465Ms came in for warranty service, | ||
primarily from the Federal Aviation Administration | primarily from the Federal Aviation Administration | ||
which had purchased a large quantity of that model. | which had purchased a large quantity of that model. | ||
But | But the rate at which instruments are brought to a service center | ||
is | is not by itself a measure of reliability, as one would be comparing | ||
a large number of new 465Ms that were shipped to the customer's depot | the failure rate of a large number of new 465Ms | ||
with an established | that were shipped to the customer's depot | ||
with an established base of 465s which already had | |||
most early defects corrected. | most early defects corrected. | ||