Boonton 4540 Peak Power Meter User Manual - Manual (Page 61)

Boonton 4540 Series RF Power Meter
Operation 4-13
4.5.8 Channel > Calibration Menu
The calibration menu contains menu items to initiate multi-step autocalibration, fixed calibration, and sensor offset zeroing.
Additionally, menus are provided to allow selection of the calibration source and a shortcut menu to the selected calibrator
control menu. Note: You can access the calibration menus directly using the Cal/Zero key. Pressing the key repeatedly will
cycle between each channel’s calibration menu. The calibration menus are presented in channel order for all active channels.
Active channels are defined as those that are installed, turned on, and have a sensor connected. If there are not active
channels, pressing the Cal/Zero key will bring you to the Channel 1 calibration menu.
Main > Channel > Channel 1 | 2 > Calibration > AutoCal
Description: Initiates a multi-point sensor gain calibration of the
selected sensor with the either the internal calibrator, or
an optional external 1 GHz calibrator. This procedure
calibrates the sensor’s linearity at a number of points
across its entire dynamic range. A sensor must be
connected to the channel input and the selected
calibrator output.
Menu Type: Action.
SCPI Command: CALibration[1|2][:INTernal|EXTernal]:AUTO[?]
Main > Channel > Channel 1 | 2 > Calibration > Fixed Cal
Description: Performs a single point sensor gain calibration of the
selected sensor with the selected calibrator. This
procedure calibrates the sensor’s gain at a single point.
At other levels, that gain setting is combined with
stored linearity factors to compute the actual power.
Menu Type: Action.
SCPI Command: CALibration[1|2]:USER:FREQcal[?]
Main > Channel > Channel 1 | 2 > Calibration > Zero
Description: For a sensor that has been previously auto calibrated
and has valid status, initiates a zero offset null
adjustment. The sensor does not need to be connected
to any calibrator for zeroing – the procedure is often performed in-system. However, this
command will turn off the specified calibrator (defaults to internal) prior to zeroing to
avoid the need to perform this step explicitly
.
Menu Type: Action.
SCPI Command: CALibration[1|2][:INTernal|EXTernal]:ZERO[?]
Fig. 4-8 Calibration Menu