Agilent Technologies E4418B, Руководство пользователя

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2 Power Meter Operation
30 E4418B Power Meter User’s Guide
The Zero/Cal Lockout facility can be enabled or disabled through either the
System Inputs menu or the Zero Cal menu as follows:
Press , , , , or .
Press , , , , or .
Calibrating the Power Meter
Calibration sets the gain of the power meter using a 50 MHz 1 mW calibrator
as a traceable power reference. The power meter’s POWER REF output or a
suitable external reference is used as the signal source for calibration. An
essential part of calibrating is setting the correct reference calibration factor
for the power sensor you are using. The
Agilent Technologies E4418B Series
Power Meter User’s Guide require you to set the reference calibration factor.
The Agilent E- Series power sensors and N8480 Series power sensors
(excluding Option CFT) set the reference calibration factor automatically.
During calibration, the wait symbol is displayed. Offset, relative, and duty
cycle settings are ignored during calibration.
Calibration Procedure Using Agilent E-Series Power Sensors
and N8480 Series Power Sensors (excluding Option CFT)
The following procedure describes how you calibrate the power meter with an
Agilent E- Series power sensor or N8480 Series power sensor (excluding
Option CFT). Since the power meter automatically downloads the
Agilent E- Series power sensor or N8480 Series power sensor (excluding
Option CFT)’s calibration table, there is no requirement to enter the reference
calibration factor. The power meter identifies that an Agilent E- Series power
sensor or N8480 Series power sensor (excluding Option CFT) is connected and
will not allow you to select certain softkeys. The text on these softkeys appears
grayed out.
Must Cal Off On
Must Cal Off On
N O T E
During calibration, the power meter automatically switches the power reference calibrator
on (if it is not already on), then after calibration, it switches it to the state it was in prior to
the calibration.