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Section 10
Power Meter
The N9340B spectrum analyzer can be used with the Keysight U2000 Series
USB power sensor to make average power measurements. It can make true
average power measurements for all types of signals with a frequency range
of 9 kHz to 24 GHz, power levels from –60 dBm to +20 dBm, and with measure-
ment speed of up to 1000 readings per second in buffered mode. The N9340B
controls the power sensor, and retrieves measurement results over the
USB port.
The N9340B displays measurement results and provides pass/fail testing with
user-defined upper and lower limits. The results are displayed in dBm and W for
absolute power measurements and in dB and percentage for relative measure-
ments. Results can be displayed in power meter mode with fast display update
rates or on a chart of power versus time.
In this demo, the N9340B is used with a U2000A USB power sensor to measure
the output power of an external signal generator.
Instruction
Key strokes
Connect the U2000A power sensor to the
USB interface of the N9340B.
[PRESET]
Turn on the power meter function.
[MODE], Rotate the knob to highlight
PowerMeter, [ENTER]
Zero and the zero type is INT
{Zeroing}, {Zeroing}
Connect the USB power sensor’s RF IN port to
the signal generator’s output and turn on the
generator.
Turn on the limit function.
If sound warning when power is beyond limit
value, {Limit Beep {On}}.
[MEAS], [Meas Setup], {Limits}, {Limits
{On}}, {Return}
Change the display mode from meter to chart. [MEAS], {Meas Disp}, {Chart View}
Save the chart (400 points)
[SYS], {File}, Enter the file name, {Save}
