Stanford Research Systems SR860 Operation Manual page 145

Chapter 4
FCRX?
The
FCRX?
is a query only command.
Example
FCRX?
FCRY?
The
FCRY?
is a query only command.
Note that
Example
FCRY?
query returns the frequency value of the FFT cursor readout (in Hz).
Returns the FFT cursor frequency value
query returns the amplitude value of the FFT cursor readout (in dB).
only returns valid data when the SR860 display is set to FFT mode.
FCRY?
Returns the FFT cursor amplitude value
Programming
SR860 DSP Lock-in Amplifier
127
FCRX?
FCRY?