4 CALibration Subsystem
200 N1911A/1912A P-Series Power Meters Programming Guide
CALibration Subsystem
The CALibration command subsystem is used to zero and calibrate the
power meter. It is also used to set the reference calibration factor for the
power sensor which is being used.
The numeric suffix of the CALibration command refers to a specific
channel:
• CALibration1 represents Channel A
• CALibration2 represent Channel B
This command does not apply to the single channel N1911A power meter
and results in the error “Header suffix out of range.”
Zeroing and calibration of the power meter is recommended:
•When a 5
o
C change in temperature occurs
• When you change the power sensor
• Every 24 hours
• Prior to measuring low level signals. For example, 10 dB above the
lowest specified power for your sensor.
The following CALibration commands are overlapped commands:
• CAL:ALL
• CAL:AUTO
• CAL:ZERO:AUTO
An overlapped command allows the instrument to continue parsing and
executing subsequent commands while it is still executing.
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