◯spurious signal
>spectrum analyzer
◯spectrum analyzer
>RF amplitude and frequency
◯Voltmeter
>indicate impedance of the voltmeter
◯Accuracy of a frequency counter
>time base accuracy
>It devides a higher frequency signal
◯antenna analyzer
>don't need extrrnal RF source
>connect ......directly
digital signal states simultaneously
>logic analyzer
oscilloscope probe
>as nearly flat as possible
>keep the signal ground connection
