I want to know what is the value of EbNo (SNR) in this channel ?? and how can I change it ? please

%%Set the sample rate and the maximum Doppler shift.

rs = 20e6;

fd = 3;

%% Create a CDMA Typical Urban channel model (TUx) channel object and turn on frequency response visualization.

chan = stdchan('cdmaTUx',rs,fd);

chan.Visualization = 'Frequency response';

%% Generate random data and apply QPSK modulation.

data = randi([0 3],10000,1);

txSig = pskmod(data,4,pi/4);

%% Filter the QPSK signal through the CDMA channel.

y = chan(txSig);