Carrier (Carrier Mapping, 6GR)
The group of the Carrier Mapping tab. All parameters are auto-coupled — see Auto and Manual Parameter Coupling.
Enabled - Includes or excludes the selected carrier from the measurement.
Default: Selected
Freq Offset - The selected carrier's frequency offset from the measurement center frequency.
Default: 0 Hz
Range: -500 MHz Megahertz: A unit of frequency equal to one million hertz or cycles per second. to 500 MHz
Carrier Definition - Selects which carrier definition (from the Carrier Definition tab's list) this carrier uses.
Default: 0
Cell ID / Source - The carrier's physical-layer cell identity, paired with a source selector. The value and the source selector are independently auto-coupled. The Cell ID value is editable only when the source is Manual.
- Auto Detected - The cell ID is detected automatically during synchronization.
- Manual - The cell ID is taken from the value entered here.
- From Definition - The cell ID is taken from the associated carrier definition's Cell ID.
While the source is Auto Detected, the value shown is the configured cell ID, not the one the measurement detected — the detected value is determined during synchronization and is reported by the Cell ID summary result.
Default: Cell ID 0, source Auto Detected
Range (Cell ID): 0 to 1007. Choices (source): Auto Detected, Manual, From Definition
Meas Channel Indexes - The measurement input channel(s) assigned to this carrier, as a list or range (for example, ).
Default: Auto — every currently available input channel
Transmitter DC Freq - The frequency of the transmitter's DC subcarrier In an orthogonal frequency division multiplexing (OFDM) or orthogonal frequency division multiple access (OFDMA) signal, the subcarrier whose frequency would be equal to the RF center frequency of the station., used to account for transmitter LO-related impairments at that frequency.
Default: Auto — tracks the measurement center frequency
Range: 0 to 200 GHz Gigahertz: A frequency measurement which equals one billion hertz.
Phase Compensation Freq - The frequency the transmitter used for symbol phase compensation, paired with a source selector. A transmitter that follows 3GPP applies a per-symbol phase rotation derived from its upconversion carrier frequency; the measurement removes that rotation, and needs to know which frequency the transmitter used in order to do so. The value and the source selector are independently auto-coupled.
- From Measurement - The transmitter is assumed to have compensated at the frequency this carrier is measured at — the center frequency of the first measurement channel assigned to this carrier, offset by Freq Offset.
- Manual - The transmitter is assumed to have compensated at the frequency entered here.
- Disabled - The transmitter is assumed not to have applied symbol phase compensation, so the measurement does not remove it.
Default: 1 GHz, source From Measurement
Choices (source): From Measurement, Manual, Disabled
This setting changes how the measurement reconstructs the reference signal, not just a reported value. Setting it to something other than what the transmitter actually did degrades EVM Error vector magnitude (EVM): A quality metric in digital communication systems. See the EVM metric in the Error Summary Table topic in each demodulator for more information on how EVM is calculated for that modulation format.. Entering a frequency switches the source to Manual automatically, so the value you typed is the one used.
See Also
