NF WAVE FACTORY WF1967, Instruction Manual (Operations

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3.3 Cautions on Floating Ground Connection
WF1967/WF1968
3-18
3.3 Cautions on Floating Ground Connection
The signal ground of the BNC terminals for FCTN OUT, SYNC/SUB OUT, and MOD/ADD IN is
shared, but since it is insulated from the enclosure (ground potential), it can be connected to the
equipment that has a different potential. Moreover, when the equipment is mounted in a rack, the signal
ground is not affected by the potential of the rack.
In WF1968, the above-mentioned BNC terminals are also insulated between channels.
Further, the signal ground of the 10MHz REN IN is also insulated from the enclosure. Therefore, noise
caused by ground-loop does not affect the connection with a frequency standard.
Nor does noise caused by ground-loop affect the connection even when synchronously connecting
multiple units of WF1967 and WF1968.
Note that, in all cases, the floating voltage should be limited to 42Vpk (DC + AC peak) or lower to
prevent electric shocks.
The other signal grounds are all connected to the enclosure. The enclosure itself is connected to a
protective conductor terminal of the power supply input.
To prevent electric shocks, do not apply a voltage exceeding 42Vpk
(DC + AC peak) between the ground of the BNC connectors insulated
from the enclosure and the enclosure.
Also, do not apply a voltage exceeding 42Vpk (DC + AC peak)
between the grounds of the BNC connector groups insulated from the
enclosure. "BNC connector groups" indicate multiple BNC connectors
that are connected to a common ground.
If such a high voltage is applied, the internal voltage limiting elements
will try to reduce the voltage, but a too high voltage may cause the
product to be burned.
If a difference in potential exists between the ground of a BNC connector
insulated from the enclosure and the enclosure, do not short-circuit the
hot side of that BNC connector and the enclosure. This may damage the
product.
If a difference in potential exists between the grounds of BNC
connectors, do not short circuit these BNC connector grounds. This may
damage the product.
CAUTION
CAUTION
WARNING