SINGLE / FREE RUN/ MAX PEAK DATA /MAX HOLD to capture (record) data.
SINGLE:Measures only once.
FREE RUN:Continuously overwrites the data.
MAX PEAK DATA:Compares the maximum peak value of the spectrum waveform and overwrites the data when the stored maximum peak value is updated.
MAX HOLD:Compares the peak value at each point of the spectrum waveform and overwrites the data when a stored peak value is updated.