Keysight x-series User Reference Manual page 472

8 Frequency Scan Measurement
Meas Setup
to move the marker around on the trace(s). You may Pause or Stop the scan from the Sweep/ Control
menu.
If there are no ranges turned on in scan table, an error is generated and the scan cannot be performed.
Search:
If Search is part of the current Scan Sequence, once the scan is complete, the measurement searches for
peaks on the trace(s). The search is based on the current Search Criteria (set under the Meas Setupà
Limits key). At any given point, if any peak meets the search criteria, a frequency zoom is performed on the
peak to determine the exact frequency of the peak. Next, the frequency will be added to the Signal List and
the amplitude value is added into the detector column of that scan. A cross mark is added for each peak
signal found on the trace. If there are multiple traces in the scan, the Search function applies to all traces.
You may pause or stop the search from the Sweep/ Control menu.
If there is no valid trace data, an error is generated and a Search cannot be performed.
If no signal peak was added from the Search to Signal List because there are no signal peaks found within
the defined parameters of the search criteria, an error is generated.
If the number of signals in the list reaches 2000, any trial to add additional peaks into the list will get an
execution error.
If the signal peaks found are more than can fit in the signal list, you will be prompted by the following
message that asks whether to continue or not:
WARNING! There is not enough free space in Signal List. Would you like to clear the Signal list before
adding signals? Press ENTER to continue or ESC to Cancel.
Measure:
If Measure is part of the current Scan Sequence, the final measurement is performed on the signals in the
signal list. This consists of making a zero span measurement on each peak using the specified final
measurement detectors and dwell times. If there are multiple ranges selected in the scan table and the
selected signal frequency falls into the range, the setting in the scan table will be used. Otherwise, for
signals in the list that are outside the scan table range, the following Resolution BW, attenuation and
preamp values will be used.
Resolution BW
• When the standard is "None":
For frequencies above the scan table range, use the maximum RBW in the selected range(s). For
frequencies below the scan table range, use the minimum RBW in the selected range(s).
• When the standard is "CISPR":
Frequency
Freq < 150 kHz
150 kHz ≤Freq < 30 MHz
30 kHz ≤Freq < 1 GHz
Freq > 1GHz
• When the standard is "MIL":
472
Resolution BW
200 Hz
9 kHz
120 kHz
1 MHz
EMI Receiver Mode Reference