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Models LB480A/LB680A USB PowerSensor+™
Product Manual PPA (Pulse Profiling Application)
Offset provides a single valued offset to all measured data. Offset shifts the actual values of the measured data (not
the viewing area). Simple offsets can be useful but they are limited in that they are not sensitive to frequency. If there
is a frequency sensitive device in the measurement path, offset becomes very cumbersome since every frequency
change must be accompanied by a change in offset.
To solve this problem use the Response tool. It is ideal for correcting measurements through devices like directional
couplers. The Response function allows you to enter a set of amplitude and frequency pairs. As the user changes the
frequency of measurement, the application automatically adjusts the offset based on the frequency selected by the
user.
Both Offset and Response can be enabled and disabled without changing the data. This allows you to setup a
response and enable and disable it without removing the data.
Instrument Preset
The Inst Preset button returns the unit to the following factory default state:
Frequency = 1 GHz
Sweep Time = 1 msec
Reference Level & Resolution = 20 dBm, 10 db/Div
Offset = 0 dB, disabled
Response = 0 dB, disabled
Trigger Source = Internal Auto
Trigger Level = -35 dBm
Trigger Edge = Positive
Trigger Mode = Continuous
Delay = 0 usec, disabled
Trigger Out = Off, Non-inverted
Averaging = 10, Off
Filter = 10 MHz with Option 004; 100 kHz without Option 004
Poles = 4 with option 004;1 with Optoin 004
Markers = All Off
Measurement Threshold = -55 dBm, On
Pulse Criteria = 6 dB (see Markers toolbar)
Gates = All Off
Display Font = Arial, 8 pts
Theme = Green
Grid = On
Results pane font = Arial, 9 pts
Auto Measure pane (not applicable)
Measurement Trace notation = Arial, 9 pts
Panoramic Trace notation = Arial, 9 pts
Measurement Trace is reset
ID Sensor
Set Address
Exit
The ID Sensor button causes the green LED on the back of the sensor to blink. This allows you to quickly associate a
particular sensor with a particular window. It is especially useful if you have more than one sensor attached to the
computer. The Set Address tool allows you to change the sensor address (1 to 255). Changing the unit address will
cause the application to close. You must then re-start the application to initialize the sensor. The Exit button allows
you to close the application.
Revision: 08/02/11
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