OPTIMOD-FM DIGITAL
INSTALLATION
2-11
Whenever coaxial cable is used, shields are automatically grounded at both ends
through the terminating BNC connectors.
Power Ground
Ground the 8300 chassis through the third wire in the power cord. Proper
grounding techniques never leave equipment chassis unconnected to power /
earth ground. A proper power ground is essential for safe operation. Lifting a
chassis from power ground creates a potential safety hazard.
Circuit Ground
To maintain the same potential in all equipment, the circuit (audio) grounds must be
connected together:
Circuit and chassis ground should always be connected by setting the 8300’s
G
ROUND
L
IFT
switch to its
G
ROUND
connect position
,
except
when the 8300’s ste-
reo encoder is driving an
unbalanced exciter input
. (Many older exciters have
unbalanced inputs.) This is an unbalanced-to-unbalanced connection, so set the
8300’s
G
ROUND
L
IFT
switch to
L
IFT
to break the ground loop that would other-
wise occur.
Alternately, you can balance and float the exciter input with the Orban
CIT25 Composite Isolation Transformer — see page 2-8.
In high RF fields, the system is usually grounded through the equipment rack in
which the 8300 is mounted. The rack should be connected to a solid earth
ground by a wide copper strap — wire is completely ineffective at VHF because
of the wire’s self-inductance.
8300 Front Panel
Screen Display
labels the four soft buttons and provides control-setting infor-
mation.
Screen
Contrast
button adjusts the optimum viewing angle of the screen dis-
play.
Four
Soft buttons
provide access to all 8300 functions and controls. The func-
tions of the soft buttons change with each screen, according to the labels at the
bottom of each screen.
Next
and
Prev
(
and
) buttons scroll the screen horizontally to accommo-
date menus that cannot fit in the available space. They also allow you to move
from one character to the next when you enter data into your 8300.
Summary of Contents for 8300J
Page 1: ...Operating Manual OPTIMOD FM 8300 Digital Audio Processor Version 2 1 Software...
Page 7: ...Operating Manual OPTIMOD FM 8300 Digital Audio Processor Version 2 1 Software...
Page 24: ......
Page 94: ...2 46 INSTALLATION ORBAN MODEL 8300 This page intentionally left blank...
Page 190: ......
Page 204: ......
Page 246: ......
Page 247: ...OPTIMOD FM DIGITAL TECHNICAL DATA 6 29...
Page 254: ...6 36 TECHNICAL DATA ORBAN MODEL 8300 CPU Module...
Page 260: ...6 42 TECHNICAL DATA ORBAN MODEL 8300 8300 RS232 BOARD PARTS LOCATOR...
Page 262: ...6 44 TECHNICAL DATA ORBAN MODEL 8300 8300 POWER SUPPLY PARTS LOCATOR...
Page 264: ...6 46 TECHNICAL DATA ORBAN MODEL 8300 8300 I O BOARD PARTS LOCATOR...
Page 270: ...6 52 TECHNICAL DATA ORBAN MODEL 8300 DSP BOARD PARTS LOCATOR DRAWING 32170 000 14...
Page 278: ...6 60 TECHNICAL DATA ORBAN MODEL 8300 8300 DISPLAY BOARD PARTS LOCATOR...
Page 279: ...OPTIMOD FM DIGITAL TECHNICAL DATA 6 61 DISPLAY BOARD...