Create a sine wave signal and view it in the scope.
Fs = 1000; % Sampling frequency
signal = dsp.SineWave('Frequency',50,'SampleRate',Fs,'SamplesPerFrame',100);
scope = dsp.TimeScope(1,Fs,'TimeSpan',0.25,'YLimits',[-1 1]);
for ii = 1:2
xsine = signal();
scope(xsine)
end