Agilent Technologies E4418B, Руководство пользователя

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Power Meter Operation 2
E4418B Power Meter User’s Guide 69
To set the duty cycle:
1
Press , , . The current setting of the duty
cycle is displayed under the softkey.
2
To change this setting, press . The power meter displays the
duty cycle in a pop- up window. Modify this value (see below) until the
desired duty cycle is displayed.
• Use or to modify the digit on which the cursor is
currently positioned.
• Use or to move to other digits.
3
To confirm your choice, press .
4
is automatically set to “On”, when a value is entered
using .
Duty cycle can be disabled and re- enabled simply by pressing
.
Input Settings
Duty Cycle
Duty Cycle
%
Duty Cycle Off On
Duty Cycle
Duty Cycle Off On
N O T E
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 or off ratio must be much greater than the duty cycle ratio.