Remote Spectrum Monitor™ MS27201A User Guide : 5GNR Measurements : 5GNR EIRP
 
5GNR EIRP
In antenna measurements, EIRP is equivalent isotropic radiated power. The measured radiated power in a single direction is known as the EIRP. EIRP is especially valuable for over-the-air power measurements of 5GNR signals, which utilize beamforming for signal transmission, unlike older wireless technologies, which are typically radiated omnidirectionally. EIRP gives a better reflection of atmospheric energy of the beam than a typical channel power measurement. Integrating EIRP in a 360 degree sphere around a beamforming transmitter would give the total radiated power (TRP). Note the EIRP should only be measured in the far field, where beams are fully formed.
EIRP Normal View
An EIRP measurement with the normal spectrum view is shown in Figure: 5GNR EIRP Normal View
5GNR EIRP Normal View
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 EIRP).
2. SYNC: Valid 5GNR occupied bandwidth measurements require signal synchronization. The indicator here blinks green when the received signal is synchronized, indicating that you have a valid measurement.
3. SETUP Menu: The EIRP settings are configured in the SETUP menu. See SETUP Menu (5GNR EIRP).
4. EIRP Measurement Summary: This area shows the measurement results summary with pass/fail test results, when enabled:
The ACTIVE EIRP value and upper/lower test limits are expressed in dBm with a pass/fail result.
The saved HORIZONTAL EIRP value with upper/lower test limits expressed in dBm with a pass/fail result.
The saved VERTICAL EIRP value with upper/lower test limits expressed in dBm with a pass/fail result.
The effective sum of the saved HORIZONTAL and VERTICAL EIRP values, with upper/lower test limits expressed in dBm with a pass/fail result.
Tapping this summary area opens the EIRP SETUP menu.
5. EIRP Input Parameters: This area shows the input parameters for the measurement:
Gate delay and length parameters are applied when gated sweep is enabled (requires Option 90). See Gated Sweep (Option 90).
The frequency and band parameters are configured in the BAND CONFIG menu. See BAND CONFIG Menu.
Receiver antenna gain parameters are configured in the EIRP SETUP menu. See SETUP Menu (5GNR EIRP).
EIRP Normal View
An EIRP measurement with the quick view is shown in Figure: 5GNR EIRP Quick View. This simplified view provides a conceptional visual of the EIRP measurement and displays the summary measurement data and input parameters. The adjustable parameters can be touched directly to change their value. Set up the measurement parameters using the BAND CONFIG Menu and SETUP Menu (5GNR EIRP).
5GNR EIRP Quick View
 
SETUP Menu (5GNR EIRP)
The EIRP SETUP menu is available in MEASURE > MEASUREMENT > EIRP > SETUP. Once the EIRP measurement is selected in the normal view, the SETUP menu can be quickly accessed by tapping on the summary display area below the spectrum display.
SETUP Menu (EIRP)
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SAVE HORIZONTAL
Saves the current EIRP measurement as the horizontally polarized EIRP value. The antenna must be set up for horizontal polarization for a valid measurement.
SAVE VERTICAL
Saves the current EIRP measurement as the vertically polarized EIRP value. The antenna must be set up for vertical polarization for a valid measurement.
RESET SUM
Clears the saved horizontal and vertical EIRP measurements and resets the sum.
RX ANT GAIN
Sets the antenna gain value from 0 dBi to 999 dBi with a resolution of 0.01 dB. For the most accurate reading, any cable loss between the antenna and the instrument should be subtracted from the RX ANT GAIN.
DISTANCE TO ANT
Sets the straight line distance between the antenna and signal source. The range can be set from 1 m to 1000 m (approximately 3.3 ft to 3300 ft) with a resolution of 0.01 (m or ft).
DISTANCE UNIT
Sets the distance unit of measure to Meters or Feet.
UPPER LIMIT
Enables the pass/fail compliance test for the upper radiated power. Once enabled, the settable range is –99 dBm to 100 dBm.
LOWER LIMIT
Enables the pass/fail compliance test. Once enabled, the settable range is –99 dBm to 100 dBm.
RX CABLE LOSS
Sets the cable loss parameter in dB/m.
PRESET SETUP
Presets the SETUP menu to default settings.
 
 
Status Panel (5GNR EIRP)
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 EIRP Measurements) shows the 5GNR status panel that covers the 5GNR EIRP measurements.
Status Panel (5GNR EIRP Measurements) 
 
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.