Technical Manual

14
important things to remember are the 60 Amperes of peak cathode current and the
0.001 duty cycle. The peak cathode current is easily observed on the screen of the
oscilloscope.
In the case of the duty cycle, each pulse condition has to be evaluated to ensure
compliance with the magnetron specification. Since the product of the pulse width in
usec and the pulse repetition rate in cycles gives directly the value of the duty cycle,
we have to mathematically evaluate it before proceeding with any pulse condition.
The pulse shape has to meet the specifications in terms of rise and fall time. Also an
important parameter is the rate of rise of the cathode voltage. This parameter has
been set by the manufacturer as the time of the steepest tangent, between the 70%
point of the cathode voltage crossing the zero axis.