Fader Path Commands

These commands set the fading path parameters for up to 24 paths. The firmware uses either filtered noise or Jakes spectral shapes for the fading simulation. The firmware does not support having some paths with Jakes method and others with filtered noise in the same simulation.

When using filtered noise, changes to the carrier frequency will change either the Doppler frequency or UE speed on all paths depending on the coupling selected. Additionally, any change to Doppler frequency or UE speed are applied to all paths and cannot be set independently for each path. Use the six channel level commands to set these parameters.

When using a Jakes Rounded or Jakes Classical spectral shape, the carrier frequency can be coupled to the Doppler frequency or UE speed for each individual path. For a one or two channel configuration only, you can also set different Doppler frequencies on different paths. Use the path level command to set these parameters.

Run-time Adjustment of Fading Parameters

For 1 Channel Generate and Fade or 1 Channel Fade (ext in) configurations:

When Dynamic Fading is not enabled, all Fader parameters (except Random Seed and Dynamic Fading), including the number of paths, are run-time adjustable from the user interface or through SCPI commands while the waveform is playing .

If n is the initial number of enabled paths, you can increase the number of paths to 6 (n ≤ 6), 12 (6 < n ≤ 12), 18 (12 < n ≤ 18) or 24 (18 < n ≤ 24).

FSIMulator[1]2 – These choices correspond to the Master Setup being configured. For Multi-user MIMO, a Master Setup is required for each user. For other configurations, using :FSIM only in the commands is sufficient.

FADer[1]2|3|4|5|6|7|8 - These choices correspond to the fader simulation block of your predefined configuration associated with the desired signal output. For MIMO configurations, the fader block number will vary depending on the number of inputs and outputs in your configuration.

PATH[1]|2|3|4|5|6|7|8|9|10|11|12|13|14|15|16|17|18|19|20|21|22|23|24 - The path attribute or value will be applied to the selected path number.

Channel Level Commands

Channel level commands are applied to all paths within the Fader group.

[:SOURce]:FSIMulator[1]2:FADer[1]|2|3|4|5|6|7|8:CFCoupling DFR|VSP

This command selects which setting (either Doppler Frequency or Vehicle Speed) is coupled to the Carrier Frequency setting. The property being coupled is recalculated from the one that remains constant when the carrier frequency is modified.

DFR	With this choice, the Doppler frequency changes (UE speed remains constant) for all enabled paths when you change the carrier frequency.
VSP	With this choice, the UE speed changes (Doppler frequency remains constant) for all enabled paths when you change the carrier frequency.

[:SOURce]:FSIMulator[1]2:FADer[1]|2|3|4|5|6|7|8:DFRequency <val>

[:SOURce]:FSIMulator[1]2:FADer[1]|2|3|4|5|6|7|8:DFRequency?

This command sets the maximum Doppler frequency of the direct ray for Rician fading and the maximum Doppler shift for Rayleigh fading for all paths on the selected fader block. Changing the Doppler recalculates the UE speed. All paths are coupled unless you select the Spectral Shape as Jakes Classical or Jakes Rounded.

The variable <val> is expressed in Hertz.

Range: 0 to 1600

[:SOURce]:FSIMulator[1]2:FADer[1]|2|3|4|5|6|7|8:DLENgth <val>

[:SOURce]:FSIMulator[1]2:FADer[1]|2|3|4|5|6|7|8:DLENgth?

This command sets the decorrelation length (m) for the configured path. Decorrelation length is the average size of objects that cause the shadowing that results in log normal fading. It requires that Log Normal or Suzuki fading is enabled.

The variable <val> is expressed in meters.

Range: 1 to 1000

[:SOURce]:FSIMulator[1]2:FADer[1]|2|3|4|5|6|7|8:SDEViation <val>

[:SOURce]:FSIMulator[1]2:FADer[1]|2|3|4|5|6|7|8:SDEViation?

This command sets the standard deviation of the log-normal shadow fading. It is activated when Log Normal is enabled or is implied by Suzuki fading. Changing the standard deviation for one path will change it for all paths.

The variable <val> is expressed in dB.

Range: 0 to 12

[:SOURce]:FSIMulator[1]2:FADer[1]|2|3|4|5|6|7|8:SSHape C3DB|C6DB|FLAT|ROUNded|GAUSsian|JCLassical|JROunded

[:SOURce]:FSIMulator[1]2:FADer[1]|2|3|4|5|6|7|8:SSHape?

This command selects the spectral shape of the filter for the fading simulation.

C3DB	Classical 3 dB filters are representative of outdoor vehicular fading environments with fixed reflectors.
C6DB	Classical 6 dB filters are representative of outdoor vehicular fading environments with fixed reflectors.
FLAT	The flat filter is representative of indoor fading environments with fixed reflectors.
ROUNded	The rounded filter represents indoor or outdoor fading environments for fixed stations with moving reflectors.
GAUSsian	The Gaussian filter is representative of slow moving hand-held reception.
JCLassical	Jakes Classical is representative of vehicular fading environments with fixed reflectors (corresponds to the 3 dB and 6 dB shape using the filtered noise method). It is required when using dynamic fading.
JROunded	Jakes Rounded is representative of indoor or outdoor fading environments for fixed stations with moving reflectors. It is required when using dynamic fading.

[:SOURce]:FSIMulator[1]2:FADer[1]|2|3|4|5|6|7|8:VSPeed <val>

[:SOURce]:FSIMulator[1]2:FADer[1]|2|3|4|5|6|7|8:VSPeed?

This command sets the speed of the UE for all paths on the selected fader block when you are using filtered noise as the spectral shape. It adjusts the Doppler frequency according to the current carrier frequency. The UE speed resolution will decrease as the number of paths is increased or the fader bandwidth is decreased and is limited by the maximum allowable Doppler frequency.

All paths are coupled unless the Spectral Shape is Jakes Classical or Jakes Rounded. Refer to the path-level :VSPeed command when using Jakes method to set different UE speeds on different paths.

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Path Level Commands

Path level commands are applied to the selected path in the selected Fader group.

[:SOURce]:FSIMulator[1]2:FADer[1]|2|3|4|5|6|7|8:
PATH[1]|2|3|4|5|6|7|8|9|10|11|12|13|14|15|16|17|18|
19|20|21|22|23|24:AOA <val>

[:SOURce]:FSIMulator[1]2:FADer[1]|2|3|4|5|6|7|8:
PATH[1]|2|3|4|5|6|7|8|9|10|11|12|13|14|15|16|17|18|
19|20|21|22|23|24:AOA?

This command sets the mean of the angle of arrival of the signal at the receiver for the selected path.

The variable <val> is expressed in degrees.

Range: –360 to 360 degrees

[:SOURce]:FSIMulator[1]2:FADer[1]|2|3|4|5|6|7|8:
PATH[1]|2|3|4|5|6|7|8|9|10|11|12|13|14|15|16|17|18|
19|20|21|22|23|24:AOD <val>

[:SOURce]:FSIMulator[1]2:FADer[1]|2|3|4|5|6|7|8:
PATH[1]|2|3|4|5|6|7|8|9|10|11|12|13|14|15|16|17|18|19|20|21|22|23|24:AOD?

This command sets the mean of the angle of departure of the signal at the transmitter for the selected path.

The variable <val> is expressed in degrees.

Range: – 360 to 360 degrees

[:SOURce]:FSIMulator[1]|2:FADer[1]|2|3|4|5|6|7|8:
PATH[1]|2|3|4|5|6|7|8|9|10|11|12|13|14|15|16|17|18|19|20|21|22|23|24:ASAOA <val>

[:SOURce]:FSIMulator[1]|2:FADer[1]|2|3|4|5|6|7|8:
PATH[1]|2|3|4|5|6|7|8|9|10|11|12|13|14|15|16|17|18|19|20|21|22|23|24:ASAOA?

This command specifies the azimuth spread of the angle of arrival at the antenna arrays of the receiver. The azimuth spread characterizes the degree of dispersion of the non-LOS signals due to a large number of local reflectors. The azimuth spread impacts the power azimuth spectrum and the correlation characteristics across the elements of the antenna array.

Range: 0.01 to 180 degrees

[:SOURce]:FSIMulator[1]|2:FADer[1]|2|3|4|5|6|7|8:
PATH[1]|2|3|4|5|6|7|8|9|10|11|12|13|14|15|16|17|18
|19|20|21|22|23|24:ASAOD <val>

[:SOURce]:FSIMulator[1]|2:FADer[1]|2|3|4|5|6|7|8:
PATH[1]|2|3|4|5|6|7|8|9|10|11|12|13|14|15|16|17|18
|19|20|21|22|23|24:ASAOD?

This command specifies the azimuth spread of the angle of departure at the antenna arrays of the receiver. The azimuth spread characterizes the degree of dispersion of the non-LOS signals due to multipath from a large number of local reflectors. The azimuth spread impacts the power azimuth spectrum and the correlation characteristics across the elements of the antenna array.

Range: 0.01 to 180 degrees

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[:SOURce]:FSIMulator[1]2:FADer[1]|2|3|4|5|6|7|8:
PATH[1]|2|3|4|5|6|7|8|9|10|11|12|13|14|15|16|17|18|
19|20|21|22|23|24:CFCoupling DFR|VSP

[:SOURce]:FSIMulator[1]2:FADer[1]|2|3|4|5|6|7|8:
PATH[1]|2|3|4|5|6|7|8|9|10|11|12|13|14|15|16|17|18|
19|20|21|22|23|24:CFCoupling?

This command selects whether to keep the Doppler frequency or UE speed constant when the carrier frequency is changed. The coupling can be changed on individual paths only when using Jakes method. For other spectral shapes, the coupling applies to all paths in the Fader.

DFR	With this choice, the Doppler frequency remains constant (UE speed changes) on the selected path when you change the carrier frequency.
VSP	With this choice, the UE speed remains constant (Doppler frequency changes) on the selected path when you change the carrier frequency.

[:SOURce]:FSIMulator[1]2:FADer[1]2|3|4|5|6|7|8:
PATH[1]|2|3|4|5|6|7|8|9|10|11|12|13|14|15|16|17|18|
19|20|21|22|23|24:DVARiation <val>

[:SOURce]:FSIMulator[1]2:FADer[1]2|3|4|5|6|7|8:
PATH[1]|2|3|4|5|6|7|8|9|10|11|12|13|14|15|16|17|18|
19|20|21|22|23|24:DVARiation?

This command sets the amount of time that the delay can vary when using the moving propagation profile. To be valid, this command requires that standard model W-CDMA, moving propagation profile, and related commands:DELay, and :DVPeriod are executed.

The variable <val> is expressed in terms of seconds.

Range: 10E–6 to 0

[:SOURce]:FSIMulator[1]2:FADer[1]|2|3|4|5|6|7|8:
PATH[1]|2|3|4|5|6|7|8|9|10|11|12|13|14|15|16|17|18|
19|20|21|22|23|24:DELay <val>

[:SOURce]:FSIMulator[1]2:FADer[1]|2|3|4|5|6|7|8:
PATH[1]|2|3|4|5|6|7|8|9|10|11|12|13|14|15|16|17|18|
19|20|21|22|23|24:DELay?

This command sets the amount of time delay due to scattering of non-LOS paths. This delay includes the path delay due to the propagation environment in addition to the inherent latency of the fading simulator.

The variable <val> is expressed in seconds.

Range:0 to 2

[:SOURce]:FSIMulator[1]2:FADer[1]|2|3|4|5|6|7|8:
PATH[1]|2|3|4|5|6|7|8|9|10|11|12|13|14|15|16|17|18|
19|20|21|22|23|24:DELay:TYPE FIXed|MOVing

[:SOURce]:FSIMulator[1]2:FADer[1]|2|3|4|5|6|7|8:
PATH[1]|2|3|4|5|6|7|8|9|10|11|12|13|14|15|16|17|18|
19|20|21|22|23|24:DELay:TYPE?

This command selects whether the propagation for the selected path is either fixed or moving. Fixed delay allows you to set a constant path delay. Moving delay varies the path delay over time depending on the path's MINDelay, MAXDelay and ROSCillation commands.

MOVing	With this choice, the propagation for the selected path is moving.
FIXed	With this choice, the propagation for the selected path is fixed.

[:SOURce]:FSIMulator[1]2:FADer[1]|2|3|4|5|6|7|8:
PATH[1]|2|3|4|5|6|7|8|9|10|11|12|13|14|15|16|17|18|
19|20|21|22|23|24:DFRequency <val>

[:SOURce]:FSIMulator[1]2:FADer[1]|2|3|4|5|6|7|8:
PATH[1]|2|3|4|5|6|7|8|9|10|11|12|13|14|15|16|17|18|
19|20|21|22|23|24:DFRequency?

This command sets the maximum Doppler frequency of the direct ray for Rician fading and the maximum Doppler shift for Rayleigh fading. If you change the Doppler frequency, the UE speed will be recalculated.

The variable <val> is expressed in Hertz.

Range: 0 to 1600

[:SOURce]:FSIMulator[1]2:FADer[1]2|3|4|5|6|7|8:
PATH[1]|2|3|4|5|6|7|8|9|10|11|12|13|14|15|16|17|18|
19|20|21|22|23|24:DVPeriod <val>

[:SOURce]:FSIMulator[1]2:FADer[1]2|3|4|5|6|7|8:
PATH[1]|2|3|4|5|6|7|8|9|10|11|12|13|14|15|16|17|18|
19|20|21|22|23|24:DVPeriod?

This command sets the period of time during which the moving propagation delay variation completes one cycle.

To be valid, this command requires that standard model W-CDMA, and moving propagation profile and related commands:DELay, and :DVARiation are executed.

The variable <val> is expressed in terms of seconds.

Range: 1 to 1000

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[:SOURce]:FSIMulator[1]2:FADer[1]|2|3|4|5|6|7|8:
PATH[1]|2|3|4|5|6|7|8|9|10|11|12|13|14|15|16|17|18|
19|20|21|22|23|24:ENABle 1|0|ON|OFF

[:SOURce]:FSIMulator[1]2:FADer[1]|2|3|4|5|6|7|8:
PATH[1]|2|3|4|5|6|7|8|9|10|11|12|13|14|15|16|17|18|
19|20|21|22|23|24:ENABle?

This command turns the path on or off. The channel bandwidth may be adjusted based on the number of paths enabled.

Configurations with regular channels:

Paths	Standard	R2C License (U01 or later)
0-6	120 MHz	160 MHz
7-12	80 MHz	80 MHz
13-24	40 MHz	40 MHz

Configurations with split channels that require split fading Option N5106A-169 (e.g., 2x8 MIMO and 4x4 MIMO):

Paths	Standard	R2C License (U01 or later)
0-6	60 MHz	80 MHz
7-12	40 MHz	40 MHz
13-24	20 MHz	20 MHz

[:SOURce]:FSIMulator[1]2:FADer[1]|2|3|4|5|6|7|8:
PATH[1]|2|3|4|5|6|7|8|9|10|11|12|13|14|15|16|17|18|
19|20|21|22|23|24:FOFFset <val>

[:SOURce]:FSIMulator[1]2:FADer[1]|2|3|4|5|6|7|8:
PATH[1]|2|3|4|5|6|7|8|9|10|11|12|13|14|15|16|17|18|
19|20|21|22|23|24:FOFFset?

This command sets the path's frequency offset with a minimum resolution of 0.01 Hz. Each path can have a different frequency offset. For a path, the absolute value of the frequency offset plus the Doppler frequency value must not exceed 1600 Hz.

The variable <val> is expressed in terms of hertz.

Range: –1600 to 1600

[:SOURce]:FSIMulator[1]2:FADer[1]|2|3|4|5|6|7|8:
PATH[1]|2|3|4|5|6|7|8|9|10|11|12|13|14|15|16|17|18|
19|20|21|22|23|24:FTYPe RAYLeigh|RICian|SUZuki|PDOPpler

[:SOURce]:FSIMulator[1]2:FADer[1]|2|3|4|5|6|7|8:
PATH[1]|2|3|4|5|6|7|8|9|10|11|12|13|14|15|16|17|18|
19|20|21|22|23|24:FTYPe?

This command sets the fading type to be applied in the fader simulation for up to 24 paths to simulate the multi-point reflection experienced in a real-world multipath environment.

RAYLeigh	This fading type simulates small scale fading environments with no direct ray component.
RICian	This fading type that adds a line-of-sight (LOS) to the Rayleigh model.
SUZuki	This fading type simulates the effects of a dense urban area. It superimposes the log normal distribution onto the Rayleigh distribution.
PDOPpler	This choice provides the flexibility to simulate pure Doppler fading by using non-zero Doppler frequencies and LOS AOA not equal to 90 or 270 degrees, or constant phase fading with either zero Doppler frequency and/or LOS AOA set to 90 or 270 degrees.

[:SOURce]:FSIMulator[1]2:FADer[1]|2|3|4|5|6|7|8:
PATH[1]|2|3|4|5|6|7|8|9|10|11|12|13|14|15|16|17|18|
19|20|21|22|23|24:LAOA <val>

[:SOURce]:FSIMulator[1]2:FADer[1]|2|3|4|5|6|7|8:
PATH[1]|2|3|4|5|6|7|8|9|10|11|12|13|14|15|16|17|18|
19|20|21|22|23|24:LAOA?

This command sets line-of-sight (LOS) angle of arrival for Rician fading. Modifications to this parameter will change the LOS frequency.

The variable <val> is expressed in degrees.

Range: 0 to 180 degrees

[:SOURce]:FSIMulator[1]2:FADer[1]|2|3|4|5|6|7|8:
PATH[1]|2|3|4|5|6|7|8|9|10|11|12|13|14|15|16|17|18|
19|20|21|22|23|24:LOGNormal On|OFF|1|0

[:SOURce]:FSIMulator[1]2:FADer[1]|2|3|4|5|6|7|8:
PATH[1]|2|3|4|5|6|7|8|9|10|11|12|13|14|15|16|17|18|
19|20|21|22|23|24:LOGNormal?

This command selects a log normal distribution of the mean signal power.

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[:SOURce]:FSIMulator[1]2:FADer[1]|2|3|4|5|6|7|8:
PATH[1]|2|3|4|5|6|7|8|9|10|11|12|13|14|15|16|17|18|
19|20|21|22|23|24:LOSS <val>

[:SOURce]:FSIMulator[1]2:FADer[1]|2|3|4|5|6|7|8:
PATH[1]|2|3|4|5|6|7|8|9|10|11|12|13|14|15|16|17|18|
19|20|21|22|23|24:LOSS?

This command sets the amount of relative path loss for the selected paths.

The variable <val> is expressed in dB.

Range: 0 to 84

[:SOURce]:FSIMulator[1]2:FADer[1]|2|3|4|5|6|7|8:
PATH[1]|2|3|4|5|6|7|8|9|10|11|12|13|14|15|16|17|18|
19|20|21|22|23|24:MAXDelay <val>

[:SOURce]:FSIMulator[1]2:FADer[1]|2|3|4|5|6|7|8:
PATH[1]|2|3|4|5|6|7|8|9|10|11|12|13|14|15|16|17|18|
19|20|21|22|23|24:MAXDelay?

This command sets the maximum LTE moving propagation delay. Moving propagation varies the path delay sinusoidally over time depending on the path's MINDelay, MAXDelay and ROSCillation commands.

Range: Varies, depending on the MINDelay command setting

[:SOURce]:FSIMulator[1]2:FADer[1]|2|3|4|5|6|7|8:
PATH[1]|2|3|4|5|6|7|8|9|10|11|12|13|14|15|16|17|18|
19|20|21|22|23|24:MINDelay <val>

[:SOURce]:FSIMulator[1]2:FADer[1]|2|3|4|5|6|7|8:
PATH[1]|2|3|4|5|6|7|8|9|10|11|12|13|14|15|16|17|18|
19|20|21|22|23|24:MINDelay?

This command sets the minimum LTE moving propagation delay. Moving propagation varies the path delay sinusoidally over time depending on the path's MINDelay, MAXDelay and ROSCillation commands.

Range: Varies, depending on the MAXDelay command setting

[:SOURce]:FSIMulator[1]2:FADer[1]|2|3|4|5|6|7|8:
PATH[1]|2|3|4|5|6|7|8|9|10|11|12|13|14|15|16|17|18|
19|20|21|22|23|24:PSHift <val>

[:SOURce]:FSIMulator[1]2:FADer[1]|2|3|4|5|6|7|8:
PATH[1]|2|3|4|5|6|7|8|9|10|11|12|13|14|15|16|17|18|
19|20|21|22|23|24:PSHift?

This command sets the RF phase shift for the LOS component in addition to the implicit phase shift due to path delay for the selected paths.

Range: 0 to 360 degrees

[:SOURce]:FSIMulator[1]2:FADer[1]|2|3|4|5|6|7|8:
PATH[1]|2|3|4|5|6|7|8|9|10|11|12|13|14|15|16|17|18|
19|20|21|22|23|24:RKFactor <val>

[:SOURce]:FSIMulator[1]2:FADer[1]|2|3|4|5|6|7|8:
PATH[1]|2|3|4|5|6|7|8|9|10|11|12|13|14|15|16|17|18|
19|20|21|22|23|24:RKFactor?

This command sets the K factor when using the Rician fading type. The K factor is the power ratio between the direct ray and the Rayleigh component of the fade. A K factor of 6 indicates that the direct ray is 6 dB stronger than the Rayleigh component.

The variable <val> is expressed in dB.

Range: –84 to 84

[:SOURce]:FSIMulator[1]2:FADer[1]|2|3|4|5|6|7|8:
PATH[1]|2|3|4|5|6|7|8|9|10|11|12|13|14|15|16|17|18|
19|20|21|22|23|24:ROSCillation <val>

[:SOURce]:FSIMulator[1]2:FADer[1]|2|3|4|5|6|7|8:
PATH[1]|2|3|4|5|6|7|8|9|10|11|12|13|14|15|16|17|18|
19|20|21|22|23|24:ROSCillation?

This command sets the rate of oscillation for LTE moving propagation delay. Moving propagation varies the path delay sinusoidally over time depending on the path's MINDelay, MAXDelay and ROSCillation commands.

Range: 0 to 50 rad/s

[:SOURce]:FSIMulator[1]2:FADer[1]|2|3|4|5|6|7|8:
PATH[1]|2|3|4|5|6|7|8|9|10|11|12|13|14|15|16|17|18|
19|20|21|22|23|24:SDGaussian <val>

[:SOURce]:FSIMulator[1]2:FADer[1]|2|3|4|5|6|7|8:
PATH[1]|2|3|4|5|6|7|8|9|10|11|12|13|14|15|16|17|18|
19|20|21|22|23|24:SDGaussian?

This command sets the path's standard deviation of the Gaussian distribution with a minimum resolution of 0.01. To set the deviation, you must first set the path's Spectral Shape to Gaussian. After setting the Spectral Shape to Gaussian, the Std Deviation of Gaussian column appears.

Range: 0.05 to 0.2

[:SOURce]:FSIMulator[1]2:FADer[1]|2|3|4|5|6|7|8:
PATH[1]|2|3|4|5|6|7|8|9|10|11|12|13|14|15|16|17|18|
19|20|21|22|23|24:SSHape 3DB|C6DB|FLAT|ROUNded|JCLassical|JROunded|GAUSsian

[:SOURce]:FSIMulator[1]2:FADer[1]|2|3|4|5|6|7|8:
PATH[1]|2|3|4|5|6|7|8|9|10|11|12|13|14|15|16|17|18|
19|20|21|22|23|24:SSHape?

This command selects the spectral shape of the filter for the fading simulation.

3DB	Classical 3 dB filters are representative of outdoor vehicular fading environments with fixed reflectors.
C6DB	Classical 6 dB filters are representative of outdoor vehicular fading environments with fixed reflectors.
FLAT	The flat filter is representative of indoor fading environments with fixed reflectors.
ROUNded	The rounded filter represents indoor or outdoor fading environments for fixed stations with moving reflectors.
JCLassical	Jakes Classical is representative of vehicular fading environments with fixed reflectors (corresponds to the 3 dB and 6 dB shape using the filtered noise method). It is required when using dynamic fading.
JROunded	Jakes Rounded is representative of indoor or outdoor fading environments for fixed stations with moving reflectors. It is required when using dynamic fading
GAUSsian	For DVB models, the Gaussian filter is representative of slow moving hand-held reception.

[:SOURce]:FSIMulator[1]2:FADer[1]|2|3|4|5|6|7|8:
PATH[1]|2|3|4|5|6|7|8|9|10|11|12|13|14|15|16|17|18|
19|20|21|22|23|24:VSPeed <val>

[:SOURce]:FSIMulator[1]2:FADer[1]|2|3|4|5|6|7|8:
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19|20|21|22|23|24:VSPeed?

This command sets the speed of the UE on individually selected paths when using Jakes method. If you change the UE speed, the Doppler frequency will be recalculated. The UE speed resolution will decrease as the number of paths is increased or the fader bandwidth is decreased.

The variable <val> is expressed in km/h.

Range: 0 to maximum value depending on Doppler frequency and carrier frequency.

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