comm.SDRuReceiver

Receive data from USRP® device

Description

The SDRuReceiver System object™ receives data from a Universal Software Radio Peripheral (USRP®[1] ) hardware device, allowing simulation and development for various software-defined radio applications. The object enables communication with a USRP® board on the same Ethernet subnetwork or a USRP® board via a USB connection. You can write a MATLAB® application that uses the System object, or you can generate code for the System object without connecting to a USRP® radio.

This object receives signal and control data from a USRP® board using the Universal Hardware Driver (UHD) from Ettus Research®. The SDRuReceiver System object receives data from a USRP® board and outputs a column vector or matrix signal of a fixed number of rows. The first call to this object might contain transient values, which can result in packets containing undefined data.

Note

Starting in R2016b, instead of using the step method to perform the operation defined by the System object, you can call the object with arguments, as if it were a function. For example, y = step(obj,x) and y = obj(x) perform equivalent operations.

Construction

rx = comm.SDRuReceiver creates an SDRuReceiver System object, rx.

rx = comm.SDRuReceiver(Name,Value) creates an SDRuReceiver System object with the specified property name set to the specified value. You can specify additional name-value pair arguments in any order as Name1,Value1,...,NameN,ValueN.

rx = comm.SDRuReceiver(address,Name,Value) creates an SDRuReceiver System object, with the IPAddress property set to address and the other specified properties set to the specified values.

Properties

expand all

Model number of the radio, specified as:

  • 'N200/N210/USRP2'

  • 'N300'

  • 'N310'

  • 'N320/N321'

  • 'B200'

  • 'B210'

  • 'X300'

  • 'X310'

Setting Platform to 'N200/N210/USRP2', 'N300', 'N310', 'N320/N321', 'X300', or 'X310' enables the IPAddress property. Setting Platform to 'B200' or 'B210' enables the SerialNum property.

Data Types: char

IP address of the USRP® device, specified as a character vector. When more than one IP address is specified, each address is separated by commas or spaces.

To find the logical network location of all connected USRP® radios, use the findsdru function.

Example: '192.168.10.2, 192.168.10.5' specifies IP addresses for two devices.

Dependencies

To enable this property, set 'Platform' to 'N200/N210/USRP2', 'N300', 'N310', 'N320/N321', 'X300', or 'X310'.

Data Types: char

Serial number of radio hardware, specified as a character vector.

This property must match the serial number of the radio hardware assigned during hardware setup. See Guided USRP Radio Support Package Hardware Setup. If you configure the radio hardware with a serial number other than the default, update SerialNum accordingly.

The drop-down list displays serial numbers for USRP® devices attached to the host computer.

Dependencies

To enable this parameter, set 'Platform' to 'B200' or 'B210'.

Data Types: char

Option to enable the TwinRX daughterboard, specified as a numeric or logical 0 (false) or 1 (true). To enable the TwinRX daughterboard on an X-series radio, set IsTwinRXDaughterboard to 1 (true).

When you enable the TwinRX daughterboard, you can use the EnableTwinRXPhaseSynchronization property to provide phase synchronization between channels of the TwinRX daughterboard.

Dependencies

To enable this property, set the Platform property to 'X300' or 'X310'.

Data Types: logical | numeric

Flag to enable phase synchronization between channels of the TwinRX daughterboard, specified as a numeric or logical 0 (false) or 1 (true). When you set this property to 1 (true), TwinRX daughterboard provides phase synchronization between all the channels. In this case, the value of the CenterFrequency property must be same for all the channels.

Note

The local oscillator (LO) source present on the channel 1 is the master source to drive other LOs of the TwinRx daughterboard channels.

To share LOs between two TwinRx daughterboards, attach the four MMCX RA male cables on one daughterboard to the MMCX RA male cables on the other daughterboard by crisscrossing the cables between the two daughterboards. Make these cable connections, as also shown in the figure.

  • J1 to J2

  • J2 to J1

  • J3 to J4

  • J4 to J3

Dependencies

To enable this property, set the Platform property to 'X300' or 'X310' and IsTwinRXDaughterboard property to 1 (true).

Data Types: logical | numeric

Channel mapping for radio or bundled radios, specified as a positive integer or vector. This table shows valid values for various radio platforms.

Platform ValueChannelMapping Value

'N200/N210/USRP2'

1-by-N row vector, where N is the number of IP addresses included in IPAddress

'N300'

1, 2, or [1 2]

'N310'

Row vector of length [1, 4] with channel numbers as {1, 2, 3, 4}

'N320/N321'

1, 2, or [1 2]

'B200'

1

'B210'

1, 2, or [1 2]

'X300' or 'X310' when the IsTwinRXDaughterboard property is 0 (false)

  • when IPAddress includes one IP address, specify this property as 1, 2, or [1 2]

  • When IPAddress includes N IP addresses, specify the property as 1-by-2N row vector. N is the number of IP addresses included in IPAddress.

'X300' or 'X310' when two TwinRX daughterboards are connected and the IsTwinRXDaughterboard property is 1 (true)

When the EnableTwinRXPhaseSynchronization property is 0 (false), specify this property as one of these values.

  • [N M], where N and M are distinct integers from 1 to 4 — Channels N and M are in use.

  • [N M P], where N, M, and P are distinct integers from 1 to 4 — Channels N, M, and P are in use.

  • [1 2 3 4]

When the EnableTwinRXPhaseSynchronization property is 1 (true), specify this property as 1, [1 2], [1 2 3], or [1 2 3 4].

When IPAddress includes multiple IP addresses, the channels defined by ChannelMapping are ordered first by the order in which the IP addresses appear in the list and then by the channel order within the same radio.

Example: If Platform is 'X300' and IPAddress is '192.168.20.2, 192.168.10.3', then ChannelMapping must be [1 2 3 4]. Channels 1, 2, 3, 4 of the bundled radio refer to channels 1 and 2 of the radio with IP address 192.168.20.2 and channels 1 and 2 of the radio with IP address 192.168.10.3.

Data Types: char

Center frequency, specified as a nonnegative scalar or row vector in Hz. The valid range of values for this property depends on the RF daughter card of the USRP® device.

When you call the step method to change the center frequency, specify the value according to these conditions.

When the IsTwinRXDaughterboard property is 0 (false)

  • For a single channel (SISO), specify the value for the center frequency as a nonnegative scalar.

  • For multiple channels (MIMO) that use the same center frequency, specify the center frequency as a nonnegative scalar. The center frequency is set by scalar expansion.

  • For multiple channels (MIMO) that use different center frequencies, specify the values in a row vector, for example, [70e6 100e6]. The ith element of the vector is applied to the ith channel specified by ChannelMapping.

    Note

    • The center frequency for B210 with MIMO must be a scalar. You cannot specify the frequencies as a vector.

    • The channels corresponding to the same RF daughterboard of N310 must have same center frequency value.

When the IsTwinRXDaughterboard property is 1 (true).

  • To tune all channels to the same frequency, specify the EnableTwinRXPhaseSynchronization property as 1 (true) and the center frequency as a scalar or row vector of the same values.

  • To tune channels to different frequencies, specify the EnableTwinRXPhaseSynchronization property as 0 (false) and the center frequency as a row vector. Each value in the row vector specifies the frequency of the corresponding channel.

Note

When IsTwinRXDaughterboard and EnableTwinRXPhaseSynchronization are both set to 1 (true), the LO source present on channel 1 is the master source to drive other LOs of the TwinRX daughterboard channels. In this case, the CenterFrequency property value must be the same for all channels of the TwinRX daughterboard.

For more information, see EnableTwinRXPhaseSynchronization.

Tunable: Yes

Data Types: double

Local oscillator (LO) offset frequency, specified as a scalar in Hz. The valid range of this property depends on the RF daughterboard of the USRP® device.

The local oscillator offset does not affect the received center frequency. However, it does affect the intermediate center frequency in the USRP® hardware, as shown in the diagram.

  • f RF represents the received RF frequency.

  • f center represents the center frequency specified by the System object.

  • f LO offset is the local oscillator offset frequency.

  • Ideally, fRF - fcenter = 0.

To move the center frequency away from interference or harmonics generated by the USRP® hardware, use LocalOscillatorOffset.

When you call the step method to change the LO offset, specify the value according to these conditions:

  • For a single channel (SISO), specify the LO offset as a scalar.

  • For multiple channels (MIMO), the LO offset must be zero. This restriction is due to a UHD limitation. You can specify the LO offset as scalar (0) or as a vector ([0 0]).

Tunable: Yes

Data Types: double

Overall gain for the USRP® hardware receiver data path, including both analog and digital components, specified as a scalar or row vector in dB. The valid range of this property depends on the RF daughterboard of the USRP® device.

When you call the step method to change the gain, specify the value according to these conditions:

  • For a single channel (SISO), specify the gain as a scalar.

  • For multiple channels (MIMO) that use the same gain value, specify the gain as a scalar. The gain is set by scalar expansion.

  • For multiple channels (MIMO) that use different gains, specify the values in a row vector, for example, [32 30]. The ith element of the vector is applied to the ith channel specified by ChannelMapping.

Tunable: Yes

Data Types: double

Clock source, specified as:

  • Internal — Uses the internal clock signal of the USRP® radio.

  • External — Uses the 10-MHz clock signal from an external clock generator.

For B-series radios, the external clock port is labeled 10 MHz. For N3xx, N2xx, USRP2®, and X-series radios, the external clock port is labeled REF IN.

To synchronize the frequency for all channels of the bundled radios, provide a common external 10-MHz clock signal to all the bundled radios and set ClockSource to 'External'.

Data Types: char

Decimation factor, specified as an integer from 1 to 1024 with restrictions, based on the radio you are using.

ValueB-seriesN2xx-seriesN3xx-seriesX-series

1

Not valid.

Not valid when connected with TwinRX daughterboard

2

Acceptable when using int8 transport data type only.

3

Not valid.

Any odd number from 4 to 128

Not valid.

Any even number from 4 to 128

Any even number from 128 to 256

Any multiple of 4 from 256 to 512

Any multiple of 8 from 512 to 1024

Not valid.

Not valid.

The radio uses the decimation factor when downconverting the intermediate frequency (IF) signal to a complex baseband signal.

Tunable: Yes

Data Types: double

Transport data type, specified as:

  • 'int16' — Uses 16-bit transport. Achieves higher precision.

  • 'int8' — Uses 8-bit transport. Uses a quantization step 256 times larger than 16-bit transport. Achieves approximately two times faster transport data rate.

Using the default transport data rate data type, means 16 bits are assigned for the in-phase component and 16 bits are assigned for the quadrature component, resulting in 32 bits for each complex sample of transport data.

Data Types: char

Data type of the output signal, specified as 'Same as transport data type', 'double', or 'single'.

  • 'Same as transport data type' — Indicates output data type will be the same as the transport data type, either 'int8' or 'int16'.

    • When the transport data type is 'int8', output values will be raw 8-bit I and Q samples from the board in the range [–128, 127].

    • When the transport data type is 'int16', output values will be raw 16-bit I and Q samples from the board in the range [–32768, 32767].

  • 'single' — Indicates single-precision floating point values scaled to the range of [–1, 1].

  • 'double' — Indicates double-precision floating point values scaled to the range of [–1, 1].

Data Types: double
Complex Number Support: Yes

Number of samples per frame of the output signal that the object generates, specified as a positive integer scalar. This value optimally utilizes the underlying Ethernet packets, which have a size of 1500 8-bit bytes.

Data Types: double

Option to enable burst mode, specified as true or false. To produce a set of contiguous frames without an overrun or underrun to the radio, set EnableBurstMode to true. Enabling burst mode helps you simulate models that cannot run in real time.

When burst mode is enabled, specify the desired amount of contiguous data using the NumFramesInBurst property. For more information, see Detect Underruns and Overruns.

Data Types: logical

Number of frames in a contiguous burst, specified as an integer.

Dependencies

To enable this parameter, set EnableBurstMode to true.

Data Types: double

Master clock rate, specified as a scalar in Hz. The master clock rate is the A/D and D/A clock rate. The valid range of values for this property depends on the radio platform connected.

Platform ValuePossible Master clock rate (Hz) Value

'N200/N210/USRP2'

100e6 Hz. Read-only.

'N300' or 'N310'

122.88e6 Hz, 125e6 Hz, or 155.3e6 Hz

Default value is 125e6 Hz.

'N320/N321'

200e6 Hz, 245.76e6 Hz, or 250e6 Hz

Default value is 200e6 Hz.

'B200' or 'B210'

From 5e6 Hz to 56e6 Hz. When using B210 with multiple channels, the clock rate must be no higher than 30.72e6 Hz. This restriction is a hardware limitation for the B210 radios only when using two-channel operations.

Default value is 32e6 Hz.

'X300' or 'X310'

184.32e6 Hz or 200e6 Hz

200e6 Hz — When IsTwinRXDaughterboard property is true.

Default value is 200e6 Hz.

Dependencies

To enable this property, set Platform to 'N300', 'N310', 'N320/N321', 'B200', 'B210', 'X300', or 'X310'.

Data Types: double

Parts per second (PPS) signal source, specified as:

  • 'Internal' — Uses the internal PPS signal of the USRP® radio.

  • 'External' — Uses the PPS signal from an external signal generator.

To synchronize the time for all channels of the bundled radios, provide a common external PPS signal to all the bundled radios and set PPSSource to 'External'.

Data Types: char

Methods

infoDisplay information about SDRuReceiver System object
stepReceive signal and control data from USRP® board
Common to All System Objects
release

Allow System object property value changes

Usage

Object Connectivity

You can verify that your SDRuReceiver System object is connected to USRP® hardware by using the info method.

  1. Create an SDRuReceiver System object.

    rx = comm.SDRuReceiver
  2. Use the info method.

    S = info(rx)

    Hardware information is returned in structure S.

Baseband Rate Lost Samples

The SDRuReceiver System object has an optional lost samples output port. When this port is active, it outputs a logical signal that indicates whether the System object is processing data in real time. If the System object is not keeping up with the hardware, the signal indicates the approximate number of lost samples.

This port is a useful diagnostic tool for determining real-time operation of the System object. If your code is not running in real time, see Common Problems and Fixes.

Examples

collapse all

Configure a B210 radio with serial number set to '30F59A1'. Set the radio to receive at 2.5 GHz, with the decimation factor of 256.

Create a SDRu Receiver System object to use for data reception.

rx = comm.SDRuReceiver(...
              'Platform','B210', ...
              'SerialNum','30F59A1', ...
              'CenterFrequency',2.5e9, ...
              'DecimationFactor',256);

Save the data using the dsp.SignalSink System object.

rxLog = dsp.SignalSink;
    for counter = 1:20
      data = rx();
      rxLog(data);
    end

Create an SDRu receiver System object for a multi-channel radio configuration.

radio = comm.SDRuReceiver('Platform','X300','IPAddress','192.168.60.2');
radio.ChannelMapping = [1 2];
radio.CenterFrequency = [1.2 1.3]*1e9;
radio.Gain = [5 6];

Call the info method.

info(radio)
ans = struct with fields:
                    Mboard: 'X300'
                  RXSubdev: {'UBX RX'  'UBX RX'}
                  TXSubdev: {'UBX TX'  'UBX TX'}
    MinimumCenterFrequency: [-70000000 -70000000]
    MaximumCenterFrequency: [6.0800e+09 6.0800e+09]
               MinimumGain: [0 0]
               MaximumGain: [37.5000 37.5000]
                  GainStep: [0.5000 0.5000]
           CenterFrequency: [1.2000e+09 1.3000e+09]
     LocalOscillatorOffset: 0
                      Gain: [5 6]
           MasterClockRate: 200000000
          DecimationFactor: 512
        BasebandSampleRate: 390625

Configure a B210 radio with serial number set to '30F597A'. Set the radio to receive at 1 GHz with an decimation factor of 512 and master clock rate of 56 MHz.

Create a SDRu Receiver System object to use for data reception.Calculate the baseband sample rate from master clock rate and decimation factor.

rx = comm.SDRuReceiver(...
               'Platform','B210', ...
              'SerialNum','30F597A', ...
              'CenterFrequency',1e9, ...
              'DecimationFactor',512, ...
              'MasterClockRate', 56e6);
sampleRate = rx.MasterClockRate/rx.DecimationFactor; % Calculate baseband sample rate        

Create a baseband file writer object having center frequency of 1 GHz.

rxWriter = comm.BasebandFileWriter('b210_capture.bb', ...
         sampleRate, rx.CenterFrequency);

Write the baseband data to file 'b210_capture.bb'.

for counter = 1:2000
      [data, len] = rx();
      if len>0
        rxWriter(data);
      end
end

Display information about received signal. Release the System objects.

info(rxWriter);
release(rx);
release(rxWriter);

Configure a B210 radio with serial number set to '30F597A'. Set the radio to receive at 2.5 GHz with an decimation factor of 125, output data type as 'double' and master clock rate of 56 MHz.

Create a USRP radio receiver System object to use for data reception.

rx = comm.SDRuReceiver('Platform','B210', ...
         'SerialNum','30F597A', ...
         'CenterFrequency',2.5e9, ...
         'DecimationFactor',125, ...
         'MasterClockRate',56e6, ...
         'OutputDataType','double');

Capture signal data using comm.DPSKDemodulaor System object.

demodulator = comm.DPSKDemodulator('BitOutput',true);

Inside a for loop, receive the data using the rx System object and return overrun as an output argument. Display the messages when receiver indicates overrun with data loss.

for frame = 1:2000
      [data, len, overrun] = rx();
      demodulator(data);
      if len>0
          if overrun~=0
              msg = ['Overrun detected in frame # ', int2str(frame)];
          end
      end
end
release(rx)

With SRDu receiver System objects, the overrun output indicates data loss. This output is a useful diagnostic tool for determining real-time operation of the System object.

Configure a B210 radio with serial number set to '30F597A'. Set the radio to receive at 2.5 GHz with an decimation factor of 125 and master clock rate of 56 MHz. Enable burst-mode buffering to overcome overrruns. Set number of frames in a burst to 20 and samples per frame to 37500.

Create a SDRu receiver System object to use for data reception.

rx = comm.SDRuReceiver(...
               'Platform','B210', ...
              'SerialNum','30F597A', ...
              'CenterFrequency',2.5e9, ...
              'DecimationFactor',125, ...
              'MasterClockRate', 56e6, ...
              'OutputDataType','double');
rx.EnableBurstMode = true;
rx.NumFramesInBurst = 20;
rx.SamplesPerFrame = 37500;

Capture signal data using comm.DPSKDemodulaor System object.

demodulator = comm.DPSKDemodulator('BitOutput',true);

Inside a for loop, transmit the data using the rx System object and return overrun as an output argument. Display the messages when receiver indicates overrun with data loss.

numFrames = 100;
for frame = 1:numFrames
        [data,len,overrun] = rx();
        demodulator(data);
      if len>0
          if (overrun)
              msg = ['Overrun detected in frame # ', int2str(frame)];
         disp(msg);
          end
      end
end
Overrun detected in frame # 1
Overrun detected in frame # 21
Overrun detected in frame # 41
Overrun detected in frame # 61
Overrun detected in frame # 81
release(rx)

Overruns are indicated at the start frame of transmission for each burst. With burst mode enabled, an overrun occurs in between bursts as the streaming resumes, because it is not possible to get continuous data when starting and stopping streaming.

Receive phase synchronized signals using the TwinRX daughterboard. The sinusoidal signals are transmitted with an N210 radio and reception is carried out on an X300 radio with two TwinRX daughterboards.

Configure an N210 radio with IP address '192.168.10.2'. Set the radio to transmit at 2.45 GHz, an interpolation factor of 100, and a master clock rate of 100 MHz. Set a gain of 8 dB and transport data type of 'int16'.

tx = comm.SDRuTransmitter('Platform','N200/N210/USRP2','IPAddress','192.168.10.2');
tx.MasterClockRate = 100e6;
tx.InterpolationFactor = 100;
tx.Gain = 8;
tx.CenterFrequency = 2.45e9;
tx.TransportDataType = 'int16';

Generate a sine wave of 30 kHz for transmission. The sample rate is calculated from the master clock rate and interpolation factor specified for an N210 radio System object configuration. Set the output data type of the sine wave as 'double'.

sinewave = dsp.SineWave(1,30e3); 
sinewave.SampleRate = 100e6/100; 
sinewave.SamplesPerFrame = 5e4; 
sinewave.OutputDataType = 'double'; 
sinewave.ComplexOutput = true;
data = step(sinewave);

Set the frame duration for the sine wave to transmit based on the samples per frame and sample rate. Create time scope and frequency scope System objects to display time-domain and frequency-domain signals, respectively. Display a message when transmission starts.

frameDuration = (sinewave.SamplesPerFrame)/(sinewave.SampleRate); 
time = 0;
timeScope = dsp.TimeScope('TimeSpan',4/30e3,'SampleRate',100e6/100);
spectrumScope = dsp.SpectrumAnalyzer('SampleRate',sinewave.SampleRate); 
disp("Transmission Started"); 
timeScope(data); 
spectrumScope(data);

Inside a while loop, transmit the sine wave using the tx System object. Display a message when transmission is complete. Release the radio System object.

while time<30
    tx(data); 
    time = time+frameDuration; 
end 
disp("Transmission Stopped"); 
release(tx);

Configure an X300 radio with IP address set to '192.168.10.2'. Set the radio to receive at 2.45 GHz with an decimation factor of 200 and a master clock rate of 200 MHz. Enable the TwinRX daughterboard and the TwinRX phase synchronization capability to receive phase synchronized signals. Set the channel mapping to [1 2 3 4]. Connect the power splitter from an N210 transmitter to four receiver channels of X300 radio for calibration.

rx = comm.SDRuReceiver('Platform','X300','IPAddress','192.168.20.2');
rx.OutputDataType = 'double'
rx.IsTwinRXDaughterboard = true; 
rx.EnableTwinRXPhaseSynchronization = true; 
rx.MasterClockRate = 200e6; 
rx.DecimationFactor = 200; 
rx.Gain = 35; 
rx.SamplesPerFrame = 4000; 
rx.ChannelMapping = [1 2 3 4];
rx.CenterFrequency = 2.45e9;

Set the frame duration for the sine wave to receive based on samples per frame and sample rate. Create the time scope and frequency scope System objects to display time-domain and frequency-domain signals, respectively. Display the message when reception starts.

frameduration = (rx.SamplesPerFrame)/(200e6/200); 
time = 0; 
timeScope = dsp.TimeScope('TimeSpan',4/30e3,'SampleRate',200e6/200); 
timeScope.ReduceUpdates = true; 
spectrumScope = dsp.SpectrumAnalyzer('SampleRate',200e6/200); 
spectrumScope.ReducePlotRate = true; 
disp("Reception Started");

Inside a while loop, receive the sine wave using the rx System object. Normalize the signal with respect to amplitude for each receive channel. Compute the fast fourier transform (FFT) of each normalized signal. Calculate the phase difference between channel 1 and channel 2, channel 1 and channel 3, and channel 1 and channel 4.

while time < 10 
 [data,len] = step(rx); 
 if len > 0 
    amp(1) = max(abs(data(:,1))); 
    amp(2) = max(abs(data(:,2))); 
    amp(3) = max(abs(data(:,3))); 
    amp(4) = max(abs(data(:,4))); 
    maxAmp = max(amp); 
    if any(~amp)  
       NormalizedData = data; 
    else 
      NormalizedData(:,1) = maxAmp/amp(1)*data(:,1); 
      NormalizedData(:,2) = maxAmp/amp(2)*data(:,2); 
      NormalizedData(:,3) = maxAmp/amp(3)*data(:,3); 
      NormalizedData(:,4) = maxAmp/amp(4)*data(:,4); 
    end 
    freqOfFirst = fft(NormalizedData(:,1)); 
    freqOfSecond = fft(NormalizedData(:,2)); 
    freqOfThird = fft(NormalizedData(:,3)); 
    freqOfFourth = fft(NormalizedData(:,4)); 
    angle1 = rad2deg(angle(max(freqOfFirst)/max(freqOfSecond))); 
    angle2 = rad2deg(angle(max(freqOfFirst)/max(freqOfThird))); 
    angle3 = rad2deg(angle(max(freqOfFirst)/max(freqOfFourth))); 
    timeScope([real(NormalizedData),imag(NormalizedData)]); 
    spectrumScope(NormalizedData); 
 end 
    time = time + frameduration; 
end

Display the calculated phase difference between channel 1 and each of the other channels of TwinRX daughterboard.

disp([' Phase difference between channel 1 and 2: ', num2str(angle1)]); 
disp([' Phase difference between channel 1 and 3: ', num2str(angle2)]); 
disp([' Phase difference between channel 1 and 4: ', num2str(angle3)]); 
disp("Reception Ended"); 
release(timeScope); 
release(spectrumScope); 
release(rx);
Phase difference between channel 1 and 2 is -98.511
Phase difference between channel 1 and 3 is -161.599
Phase difference between channel 1 and 4 is -86.680

More About

expand all

Compatibility Considerations

expand all

Errors starting in R2020a

Introduced in R2011b


[1] USRP, USRP2, UHD, and Ettus Research are trademarks of National Instruments Corp.