Why do I get the error 'Too many input arguments', when executing 'tx(data,fc)'?

I set up my SDR transmitter device as follows:

tx = comm.SDRuTransmitter('Platform', 'fooPlatform', ...
'SerialNum','fooSerialNumber', ...
'CenterFrequency',fc, ...
'InterpolationFactor',fooFactor, ...
'MasterClockRate', fooRate,...
'Gain',fooGain);

If 'data' is a sine wave signal, when I use

tx(data, fc)

to transmit the signal, I get the following error:

Too many input arguments. Expected 1 (in addition to System object), got 2.

Answer 1

[MathWorks Support Team]

The function call should be modified as tx(data) instead of tx(data, fc), as specified in this example:

https://www.mathworks.com/help/releases/R2021a/supportpkg/usrpradio/ug/comm.sdrutransmitter-system-object.html#mw_84da65a6-f7ca-4e51-a132-346d26954568

In this case, the carrier frequency is set when the system object is set up, so it should not be included in the function call.