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5-2
Figure 5-1 Positive/Negative Pulse
Figure 5-2 Rise/Fall Time
The 2251A, for all of the automatic functions except Phase, defaults to the following
signal conditioning parameters:
COMMAND
Parameter Set
BCC
Common Channel B to Channel A
AAU
Auto-trigger Channel A (and Channel B due to Common)
ADC
DC couple Channel A (and Channel B due to Common)
AFD
Filter is disabled on Channel A, the only channel on which it is
available.
When in the automatic functions of Pulse Width and Rise/Fall Time, the signal being
measured on the 2251A is on a single channel and the Common mode (BCC) is
automatically enabled. Channel A and B inputs are internally connected to allow the counter
to minimize propagation delay and mismatch. When in Common mode it is not possible to
swap Channels A and B. Therefore, Special Function 21 (SFE 21) is not applicable.
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Содержание 2251A
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