Operating instructions

OPTIMOD-AM DIGITAL INSTALLATION
2-7
E) Connect the earth ground terminals on the Rolloff Filter to earth ground for
shielding.
To avoid potential ground loops, the earth ground is not connected to
the COM terminals.
F) Set the ROLLOFF control of the Rolloff Filter to taste. See Figure 2-5 on page 2-
6.
Figure 2-6: Monitor Rolloff Filter Schematic Diagram
9400 Rear Panel
The Ground Lift Switch can be set to connect the 9400’s circuit ground to its chas-
sis ground (in the G
ROUND position). In the LIFT position, it breaks that connection.
(See Set Ground Lift switch on page 2-3.)
The V
oltage Select switch can be set to 115V (for 90-130V operation) or 230V (for
180-260V operation).
Fuse values can be changed to support 115V or 230V operation. For safety, use ½-A-
250V Slow-Blow for 115V, or 500mA-250V for 230V.
The Power Cord is detachable and is terminated in a “U-ground” plug (USA stan-
dard), or CEE7/7 plug (Continental Europe), as appropriate to your 9400’s Model
Number.