What does the symbol mean?

[Chengjun Li]

Hi,

I have a function generator Agilent 33250A,

On it output port, it has a symbol like shown below.

What does it mean?
The function generator has an inner circuit like
,
The shield is connected to the ground through a resistor and a capacitor, but I really don't see there is any relation with 42Vpk.
Also in my Agilent 6614C

there is a symbol

Could anyone tell me what does it mean?

Thanks.

 

[hevans1944]

The symbol on the 33250A means the shield of the BNC is not connected to Earth ground, but will tolerate up to 42 V peak voltage between the shield and Earth ground.
The symbol on the 6614C means the power supply outputs are not connected to Earth ground, but can be "floated" ±240 VDC with respect to Earth ground without damage to the power supply. Handy for stacking multiple power supply outputs.