You can verify that the RTL-SDR Receiver block is connected to RTL hardware by examining the block mask.
Open model with an RTL-SDR Receiver block.
Double click on the block to open the block mask.
If the block is connected, then the Hardware Information panel shows the current settings of the RTL radio.
If the block is not connected, the Hardware Information panel
shows the message
Cannot find radio.
Note that a block can connect to only one receiver at a time, on the same radio address.
Follow these steps to verify that your RTL-SDR receiver System object™ is connected to the RTL-SDR radio:
Construct an RTL-SDR receiver System object:
h = System: comm.SDRRTLReceiver Properties: RadioAddress: '0' CenterFrequency: 102500000 EnableTunerAGC: true SampleRate: 250000 OutputDataType: 'int16' SamplesPerFrame: 1024 FrequencyCorrection: 0
Enter the following command:
If there is a radio at RadioAddress 0, then the information returned shows the current settings of the RTL radio.
ans = RadioName: 'Generic RTL2832U OEM' RadioAddress: '0' RadioIsOpen: 0 TunerName: 'R820T' Manufacturer: 'Realtek' Product: 'RTL2838UHIDIR' GainValues: [29x1 double] RTLCrystalFrequency: 28800000 TunerCrystalFrequency: 28800000 SamplingMode: 'Quadrature' OffsetTuning: 'Disabled'
A System object can only connect to one subdevice (receiver) at a time, on the same radio address. RTL-SDR radio System objects connect to a subdevice when you call the step method, and will stay connected until you call the release method.