Stanford Research Systems DS360 Operating Manual And Programming Reference page 116

6-22 Performance Tests
7) Disconnect the + BNC output from the DVM. Connect the - BNC output to the DVM. Repeat
steps 1 through 5.
8) Confirm the output on/off function operates
a) Press
[ON/OFF] (output on/off)
b) Confirm that the DVM reads 0 (or nearly zero).
9) This completes the offset tests.
DS360 Ultra Low Distortion Function Generator