2 Operating Information
22 U2000 Series Operating and Service Guide
Measurement Mode
The U2000 Series USB power sensors have two measurement modes:
average only (chopper- based measurement) and normal
1
(sample- based
measurement) mode.
Average only Mode
The average only mode (default mode) is optimized for wide dynamic
range. In this measurement mode, a trigger can be controlled externally
via TTL input.
Normal Mode
The normal mode is used for making average power measurement in a
defined time interval (also known as time- gated measurement) with
reduced dynamic range. A trigger can be derived from an RF signal
(internal trigger) or controlled externally via TTL input (external trigger).
Trace Displ ay
The U2000 Series USB power sensors can also be configured to display
measurement results in trace format using SCPI commands or the N1918A
Power Analysis Manager when the power sensors are set to normal mode.
To create the trace graph display using SCPI commands, refer to the
programming example available in the Agilent U2000 Series USB Power
Sensors Programming Guide.
To set up the trace graph display using the N1918A Power Analysis
Manager, refer to the software help file for a step- by- step procedure.
Figure 2- 1 shows the illustration of the trace graph if the N1918A Power
Panel tool is used.
1 Not applicable for U2004A.
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