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LBXXXA Series USB PowerSensor+™
Product Manual PMA (Power Meter Application)
The Toolbar
The toolbar is shown below. Notice that each toolbar button has a label if you hover over it with the mouse cursor. The
toolbar buttons are like hot keys that duplicate many of the menu selections or actions and make it easier to
manipulate the meter settings. Each function is accessible from the menu bar and some toolbar buttons are simply
switches.
More detailed descriptions of the toolbar buttons are listed below. Graphic examples of the toolbar functions follow in
sequence after that starting with Averaging.
Switch between Average (CW) and Pulse Power modes of operation. This button is not present for LB5XXA.
Mode:
Select the power units (dBm, dBW, dBkW, dBuV, dBmV, dBV, W, V, dB Relative).
Power:
Select the frequency units (MHz or GHz). The center frequency must be updated when the incoming
Frequency:
signal frequency changes as this frequency setting is used to correct amplitude for frequency variation. The best
measurement accuracy requires the frequency to be set and not doing so can be a significant source of error.
Select averaging from 1 to 30000 measurements. The number of averages depends on signal stability
Averaging:
and power level. More averaging may be required for low-level signals. Increasing the number of averages also
increases the measurement time.
Set, enable, reset extended averaging from the drop down. Extended averaging should be seen
Extended Averaging:
as an adjunct to averaging. Extended averaging is an exponential average of the last n readings where n is the
number of extended averages. This function is reset by the front panel button labeled Rst Max & XAvg. This button
resets or restarts both the max hold and extended averaging functions.
:
Retains the maximum measured value until reset or deactivated. For pulse measurements, each reading
Max Hold
(Pulse, Peak, CrF, Avg, DC) is held at its maximum value independent of the other readings. This function is reset by
the front panel button labeled Rst Max & XAvg . This button resets or restarts both the max hold and extended
averaging functions.
The toolbar button is toggle on/off. Enable anti-alias control for input modulation bandwidths
Anti-alias Control:
greater than 200 kHz. Disable it for modulation bandwidths less than 200 kHz.
The toolbar button is toggle on/off. The Offsets & Response setup menu allows gain or loss
Offset Correction:
offsets to be entered as part of the measurement setup.
The toolbar button is toggle on/off. The Offsets & Response setup menu allows
Frequency Response Correction:
frequency dependent gain or loss offsets to be entered as part of the measurement setup.
Revision: 08/02/11
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