11A71: Difference between revisions

6 bytes removed ,  18 July 2018
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The 11A71 is derived from the [[7A29]].
The 11A71 is derived from the [[7A29]].
However, the 7A29 has a VARIABLE gain control
However, the 7A29 has a VARIABLE gain control while the 11A71 does not, it has only the 1-2-5 gain sequence.
while the 11A71 does not.


The 11A71 has only the 1-2-5 gain sequence.
The 7A29 and 11A71 have virtually the same analog circuitry including a Gilbert multiplier at the front end,
The 7A29 and 11A71 have virtually the same analog circuitry including a Gilbert multiplier at the front end,
but in the 11A71 it is only used for automatic calibration, not for fine gain control.
but in the 11A71 it is only used for automatic calibration, not for fine gain control.
This is feature regression, but it avoids an issue that the 7A29 has: the bandwidth of the 7A29 changes substantially with the setting of the front panel VARIABLE VOLTS/DIV control.
This is feature regression, but it avoids an issue that the 7A29 has, namely that its bandwidth changes substantially with the setting of the front panel VARIABLE VOLTS/DIV control.


After calibration, there is a small imbalance in the 10mV/div setting, about 0.05 div.
After calibration, there is a small imbalance in the 10 mV/div setting, about 0.05 div.
This is a design flaw.
This is a design flaw.


{{BeginSpecs}}
{{BeginSpecs}}