Models LB480A/LB680A
USB Powe™
Product Manual PPA (Pulse Profiling Application)
Revision: 08/02/11
38
Now click to the left and right of the gate pair to set the gate end points as shown below. The measured value will
appear in the
Results
pane under the gate and above the grid in the Measurement view. Notice that if the gate is not
expanded you will see a measurement summary next to the gate node. You click on a gate to make it active. An
asterisk (*) indicates the active gate and only one gate can be active at a time. The drop down menu on each gate
shows the selection of measurements that can be made or, right-click on the gate in the
Results
pane. A dashed line
(--.--) will appear if the gate cannot take a measurement or is not set. Adjust the gate end points accordingly to get a
reading. A complete cycle of the incoming signal must be gated for periodic measurements such as duty cycle and
frequency; and pulse width measurements must be at or below the 3 dB points (see the measurement description
above). Notice that the measurement result does not change as long as an entire pulse is selected. That is, if you
move the left gate closer to the left edge of the display the measurement result remains unchanged.
