Agilent Technologies E1439 User Manual page 39

C. Time C is less than the magDwell time. The magnitude trigger does not recognize the
signal as being low
D. Time D is longer than the magDwell time. The magnitude trigger does recognize the
signal as being low and a negative trigger may occur at the end of D.
In the example shown, the signal is below the threshold at A and C, but in both of these cases, the
signal is low for a time less than the magDwell time. Hence the magnitude trigger does not
recognize the signal as low and these do not cause any triggers. About half way through B, the
signal has remained low long enough so that the trigger recognizes the signal as low. After this, a
positive trigger would occur on the next rising edge of the signal's magnitude. A negative trigger
would occur at the end of D, a magDwell period of time after the falling edge.
Using the Agilent E1439
Magnitude trigger and magdwell time
29