USRP Radio Parameters and Supported Ranges

Since R2026a

To configure USRP™ radios, you need to set the parameters of these System objects and blocks so that the hardware can tune and transmit or receive the signals.

• comm.SDRuTransmitter

• comm.SDRuReceiver

• SDRu Transmitter

• SDRu Receiver

This topic lists the key parameters of USRP radios supported by Communications Toolbox™ Support Package for USRP Radio and shows valid ranges for each USRP radio series.

Center Frequency

Center frequency is the frequency at which the USRP radio transmits or receives signals. The center frequency value depends on the RF daughterboards supported by each USRP radio.

USRP Radio Series	Valid Range (Hz)
USRP B2xx Series	70 MHz to 6 GHz
USRP N2xx Series	The center frequency value for N2xx series radios varies depending on the RF daughterboard.

For USRP N2xx series radio , the center frequency value depends on the RF daughterboard.

RF daughterboard	Valid Range (Hz)
LFRX	0 to 30 MHz
LFTX	0 to 30 MHz
SBX	400 MHz to 4.4 GHz
WBX	50 MHz to 2.2 GHz
UBX	10 MHz to 6 GHz
TVRX	50 MHz to 860 MHz
TVRX2	50 MHz to 860 MHz
XCVR2450	High band — 4.9 GHz to 6.0 GHz Low band — 2.4 GHz to 2.5 GHz
DBSRX	8 MHz - 66 MHz
DBSRX2	800 MHz to 2.3 GHz

Gain

Gain determines the level of amplification applied to the signal. Increasing gain boosts the signal strength, which can improve reception of weak signals but may also introduce noise or distortion if set too high. Lower gain reduces amplification, which can help avoid saturation but may make the signal too weak for accurate processing. Choosing the right gain ensures a balance between signal quality and noise performance. The gain value depends on the RF daughterboards supported by each USRP radio.

USRP Radio Series	Rx Gain Valid Range (in dB)	Tx Gain Valid Range (in dB)
USRP B2xx Series	0 to 76 dB	0 to 90 dB
USRP N2xx Series	The gain value for N2xx series radios varies depending on the RF daughterboard.

For USRP N2xx series radio , the gain value depends on the RF daughterboard.

RF daughterboard	Rx Gain Valid Range (in dB)	Tx Gain Valid Range (in dB)
SBX	0 to 31.5 dB	0 to 31.5 dB
WBX	0 to 31.5 dB	0 to 31.5 dB
UBX	0 to 31.5 dB	0 to 31.5 dB
TVRX	RF: -13.3 to 50.3 dB (frequency-dependent) IF: -1.5 to 32.5 dB	-
TVRX2	0 to 30 dB	-
XCVR2450	Low-noise amplifier (LNA): 0 to 30.5 dB Variable gain amplifier (VGA): 0 to 62 dB	Variable gain amplifier (VGA): 0 to 30 dB Baseband (BB): 0 to 5 dB
DBSRX	Gain control 1 (GC1): 0 to 56 dB Gain control 2 (GC2): 0 to 24 dB	-
DBSRX2	Gain control 1 (GC1): 0 to 73 dB Gain control 2 (GC2): 0 to 15 dB	-

Master Clock Rate

Master clock rate is the base hardware clock that determines the radio’s internal sampling and conversion rates. USRP radios transmit and receive waveforms at a sample rate of MCR divided by a supported decimation or interpolation factor, where MCR is the master clock rate.

USRP Radio Series	Valid Range (Hz)
USRP B2xx Series	5 MHz to 61.44 MHz
USRP N2xx Series	100 MHz

Decimation Factor or Interpolation Factor

Decimation and interpolation factors control how the radio scales the master clock rate to achieve the requested sample rate.

USRP Radio Series	Decimation Factor Valid Range	Interpolation factor Valid Range
USRP B2xx Series	1 2 3 Odd integer from 4 to 128 Even integer in the range [4,256] Integer multiple of 4 in the range [256,512	1 2 3 Odd integer from 4 to 128 Even integer in the range [4,128] Even integer in the range [128,256] Integer multiple of 4 in the range [256,512
USRP N2xx Series	2 (Valid only when you set TransportDataType property to int8 Odd integer from 4 to 128 Even integer in the range [4,256] Integer multiple of 4 in the range [256,512	2 (Valid only when you set TransportDataType property to int8 Odd integer from 4 to 128 Even integer in the range [4,128] Even integer in the range [128,256] Integer multiple of 4 in the range [256,512