:FFT:REFerence
:FFT:REFerence <level>
:FFT:REFerence?
<level>
NR3
The current reference level in NR3 format
The :FFT:REFerence command specifies the FFT vertical value represented at center screen. If you set the reference level to a value outside of the legal range, the level is automatically set to the nearest legal value.
<level><NL> where <level> is the current reference level in NR3 format
Query the current reference level
:FFT:REFerence?