Keysight Technologies C Series User Manual page 588

Fieldfox analyzers

Frequency Offset Using Power Sensor (FOPS) – Option 208

FOPS Settings

Sweep Type and Frequency

Set the source and receiver frequencies for the FOPS measurements. The

receiver is a Keysight U-Series Power Sensor. These are broadband

measurement devices, which means that they measure power over a very wide

frequency range. Tables of frequency and power correction factors are stored

within the power sensors. The receiver (Rx) frequencies are used ONLY to apply

the appropriate correction factors to the power levels measured with the power

It is YOUR responsibility to ensure that ONLY the signal of interest is

present at the power sensor. All other signals MUST be filtered

appropriately.

How to set Sweep Type and Frequency

— Press Freq/Dist

— Then choose from the following:

To make FOPS measurements at a single frequency, choose Swept, then

enter a Src Center frequency, then Span = 0 Hz.

Not available until source data is stored into memory. Displays the

Output power / Source power (memory trace).

Displays the raw received power at the USB power sensor.

Used to make standard (non-offset) power meter measurements at a

single frequency. Learn more in

Used to make swept FOPS measurements.

Then enter source (Src) frequencies as either Center and Span

or Start and Stop. Both methods set the FieldFox internal

source sweep range out the Port 1 RF Output connector.

——The frequency limits are determined by the limits of both the

FieldFox and the power sensor.

——The LOW frequency is limited by the higher of either the

FieldFox or the power sensor minimum frequencies.

——The HIGH frequency is limited by the lower of either the

FieldFox or the power sensor maximum frequencies.

——Then More.

"USB and LAN Power Meter Settings" on

Keysight N9915-90020 User's Guide

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