1. Good sample set #1 centre freq=2
Good sample set #1 centre freq=2.55GHz, i/p signal=-70dbm,5MHz offset low amplitude signal – no noise spikes

2. Good sample set #2 centre freq=2
Good sample set #2 centre freq=2.55GHz, i/p signal=no signal (50 points) no signal so just noise, again noise spikes

3. Good sample set #3 centre freq=2
Good sample set #3 centre freq=2.55GHz, i/p signal=no signal (2K points) looking at more samples – still shows no spikes

4. Bad sample set #4 centre freq=1
Bad sample set #4 centre freq=1.3GHz, i/p signal=-70dbm,5MHz offset noise spike of -251

5. Bad sample set #5 centre freq=1
Bad sample set #5 centre freq=1.3GHz, i/p signal=no signal (50 points) with no signal, more spikes 4x

6. Bad sample set #6 centre freq=1
Bad sample set #6 centre freq=1.3GHz, i/p signal=no signal (2K points) with larger sample sets can see many noise spikes