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M377: Difference between revisions
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==165-2089-xx Pinout== | ==165-2089-xx Pinout== | ||
In the 11A32, output 1 is AUX SIG (aka AUX TRIGGER), output 2 is TRIGGER, and output 3 is DISPLAY. | In the 11A32 and 11A34, output 1 is AUX SIG (aka AUX TRIGGER), output 2 is TRIGGER, and output 3 is DISPLAY. | ||
Note that in the 11A32 and 11A34, the HF ADJUST control voltages are not set identically for the three outputs. | |||
The reason for this is that the DISPLAY and TRIGGER outputs are in parallel with the corresponding output from another | |||
M377, which forms a broadband termination. In contrast, the AUX SIG outputs are not combined, and therefore have | |||
1/4 W resistors on the PCB, shunting to ground. The 1/4 W resistors become inductive at high frequencies, so the optimal | |||
HF adjustment for the AUX SIG output is different than for the DISPLAY and TRIGGER outputs. | |||
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