HP 3300A Technical Manual page 13

Section III
± 25 V, between CKT GND and the
common grounds. OUTPUT GND, SHIELD
GND, and PWR LINE GND should be
shorted together (15).
c. If more than ± 25 V dc offset is desired,
short CKT GND.
SHIELD GND together (15). Up to ± 250 V
OUTPUT GND, and
dc may be applied between this common
ground and PWR LINE GND.
WHEN THE OUTPUT GROUND IS
FLOATED
GROUND.
WILL BE AT THE OFFSET VOLTAGE.
3-2
Model 3300A
WARNING
ABOVE POWER LINE
ALL BNC CONNECTORS