Remote Spectrum Monitor™ MS27201A User Guide : 5GNR Measurements : 5GNR Channel Power
 
5GNR Channel Power
Channel power measurements are one of most common measurements for a radio transmitter. This test measures the output power of a transmitter within the specified channel bandwidth. Out-of-specification power measurements indicate system faults, which can be in the power amplifiers or in filter circuits. Channel power measurements can be used to validate transmitter performance, comply with government regulations, or to keep overall system interference at a minimum.
The channel power measurement is a test performed to measure the power transmitted within a specified frequency or channel bandwidth. The total RF power and power spectral density (PSD) is determined from a channel power measurement. An example of a channel power measurement is shown in Figure: 5GNR Channel Power Measurement.
5GNR Channel Power Measurement 

1. 5GNR Analyzer Status Panel: Each measurement features a unique status panel that displays settings and information relevant to the current measurement and view settings. This panel provides quick access to the measurement frequency, subcarrier spacing, channel bandwidth, and band configuration. See Status Panel (5GNR Channel Power).
2. Channel Power: Channel power is integrated over the shaded region where the dashed green lines indicate the upper and lower frequency thresholds.
3. SYNC: Valid 5GNR channel power measurements require signal synchronization. The indicator here blinks green when the received signal is synchronized, indicating that you have a valid measurement.
4. SETUP Menu: The channel power settings are configured in the SETUP menu. See SETUP Menu (5GNR Channel Power).
5. Channel Power Summary: This area shows the channel power measurement summary data and pass/fail test results, when enabled:
The total channel power value and the test limit are expressed in dBm with a pass/fail result.
The total PSD limit is expressed in dBm with a pass/fail result.
Tapping this summary area opens the Channel Power SETUP menu.
 
SETUP Menu (5GNR Channel Power)
The Channel Power SETUP menu is available in MEASURE > MEASUREMENT > Channel Power > SETUP. Once the channel power measurement is selected, the SETUP menu can be quickly accessed by tapping on the summary display area below the spectrum display.
5GNR SETUP Menu (Channel Power)
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INTEGRATION BW
Sets the range of integration used in calculating the power in the channel. The integration bandwidth (IBW) is displayed as the shaded region between the bandwidth start and stop thresholds (dashed green lines).
PSD UNITS
Sets the unit bandwidth for power spectral density (PSD). The available units are Hz or MHz.
POWER LIMIT
The power limit is the threshold value used to determine whether the actual measured channel power will pass or not. If the measured channel power exceeds the set power limit, the channel power test fails; otherwise, the test passes. Pass/fail test results are shown in the measurement results table.
PSD LIMIT
If the power spectral density limit is on, the PSD limit is the threshold value used to determine whether the actual measured PSD will pass or not. If the measured PSD exceeds the PSD limit, the PSD test fails; otherwise the test passes.
PRESET SETUP
Presets the SETUP menu to default settings.
 
Status Panel (5GNR Channel Power)
The status panels illustrated in this section are unique to the current analyzer and to the particular measurement and view that is selected.
Figure: Status Panel (5GNR Channel Power Measurement) shows the 5GNR status panel that covers the 5GNR channel power measurements.
Status Panel (5GNR Channel Power Measurement) 
 
SWEEP: Toggles the current sweep setting between continuously or sweep once.
SWEEP ONCE
When sweep is set to single sweep, SWEEP ONCE updates the measurement display. Data continues to be captured in the background.
BAND
Select MANUAL, Global All or one of the predefined bands. Selecting MANUAL disables ARFCN and GSCN settings.
ARFCN
ARFCN is the Absolute Radio Frequency Channel Number. The ARFCN is a unique identification number assigned to each radio channel within a communications spectrum. The ARFCN can be used to calculate the center frequency of the radio channel. The available input range is dependent on the selected band. ARFCN is activated when the BAND is set to a predefined band or Global All.
CHANNEL BW
Sets the measurement channel bandwidth. The available bandwidth settings depend on the selected band and bandwidth option installed in the instrument. Refer to Options Settings.
GSCN
GSCN is the Global Synchronization Raster Channel. The GSCN identifies the mapping of the synchronous signal block (SSB). The available input range is dependent on the selected band. GSCN is activated when the BAND is set to a predefined band or Global All.
SUBCARRIER SPACING
Sets the subcarrier spacing. The available input range is dependent on the selected band.
CENTER FREQUENCY
When the band is set to MANUAL, sets the center frequency of the measurement channel. Changing the center frequency sets the band to MANUAL.
SSB OFFSET
SSB is the Synchronous Signal Block. The SSB Offset sets the frequency offset between the SSB and the overall resource block.
TRACES: Displays the current status of up to six traces in a quick-view summary. The summary information includes the trace number, type, mode, and detector type. The active trace or cursor will show a highlighted background with the mode and detector type restated under the table. Clicking a trace in the summary panel opens the TRACE menu. It allows you to select and set up an individual trace as desired.
FREQ REFERENCE
Indicates the current frequency reference source of Internal, External, or GPS Hi Accuracy (requires GPS). The instrument automatically selects the frequency reference in the following order of priority: external, GPS, then the internal time base.