4 CALibration Subsystem
108 U2000 Series Programming Guide
CALibration Subsystem
The CALibration command subsystem is used to zero the power sensor.
Zeroing of the power sensor 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.
Keyword Parameter Form Notes Page
CALibration
[:ALL] [event; no query] page 109
[:ALL]? [event; query] page 110
:AUTO <boolean>|ONCE page 112
:ZERO
:AUTO <boolean>|ONCE page 114
:TYPE <EXTernal|INTernal> page 116
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