CAUTION
To avoid possible equipment damage, the instrument cabinet
should be grounded. Always use a three-wire power cable
connected to a three-wire power line outlet to power the
681XXA.
Power
Connection
Connecting the 681XXA to line power automatically
places it in operation (front panel
OPERATE
LED
on). To connect it to the power source, plug the fe-
male end of the power cable into the receptacle on
the line voltage module (Figure 2-2). Then plug the
male end of the power cord into a three-wire power
line outlet.
Standby Op-
eration
Whenever the sweep generator is not being used it
should be left connected to the power source and
placed in standby. This keeps the internal timebase
frequency reference at operating temperature.
On the front panel, press
LINE
to switch the
681XXA from
OPERATE
(green LED on) to
STANDBY
(orange LED on).
NOTE
During standby operation, the fan runs
continuously.
Figure 2-2. Sweep Generator Rear Panel showing Power Connection
PREPARATION
INSTALLATION
FOR USE
LINE
OPERATE
STANDBY
SYSTEM
MODULATION
LEVEL
CONTROL
Line
Key
681XXA OM
2-5
