HP E4418B User Manual page 82

Power Meter Operation
Measuring Pulsed Signals
To set the duty cycle:
Duty cycle can be disabled and re-enabled simply by pressing
Duty Cycle Off On
Note
2-42
System
1. Press ,
Input Settings
Inputs
the duty cycle is displayed under the
2. To change this setting press
displays the duty cycle in a pop up window. Modify this value (see
below) until the desired duty cycle is displayed.
Use or
currently positioned.
Use or
3. To confirm your choice press
4.
Duty Cycle Off On
is entered using
.
Pulse power averages out any aberrations in the pulse such as
overshooting or ringing. For this reason it is called pulse power
and not peak power or peak pulse power.
In order to ensure accurate pulse power readings, the input signal
must be pulsed with a rectangular pulse. Other pulse shapes (such
as triangle, chirp or Gaussian) will cause erroneous results.
The pulse power on/off ratio must be much greater than the duty
cycle ratio.
,
More
Duty Cycle
Duty Cycle
to modify the digit on which the cursor is
to move to other digits.
.
%
is automatically set to "On" when a value
.
Duty Cycle
. The current setting of
softkey.
. The power meter
HP E4418B User's Guide