Orban OPTIMOD-FM 8700, Operating Manual

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OPTIMOD-FM DIGITAL INSTALLATION
2-3
plies are connected to AC power, then the alarm indicates that one supply has
failed. Because the alarm cannot be silenced except by fixing the problem, we
recommend purchasing a spare supply and keeping it available in case of failure.
For safety reasons, there are no user-serviceable parts inside the supply. In case of failure,
the entire failed module must be replaced.
3. Mount the 8700i in a rack.
The 8700i requires three standard rack units (5 inches / 12.7 cm).
There should be a good ground connection between the rack and the 8700i chas-
sis—check this with an ohmmeter to verify that the resistance is less than 0.5

.
Mounting the unit over large heat-producing devices (such as a vacuum-tube
power amplifier) may shorten component life and is not recommended. Ambient
temperature should not exceed 45

C (113

F) when equipment is powered.
Equipment life will be extended if the unit is mounted away from sources of vi-
bration, such as large blowers and is operated as cool as possible.
4. Connect inputs and outputs.
See the hookup and grounding information on the following pages.
Audio Input and Output Connections ............................................................ Page 2-6
AES3 Digital Input and Output ....................................................................... Page 2-8
Connecting a Ratings Encoder ........................................................................ Page 2-8
Composite Output and Subcarrier Inputs ...................................................... Page 2-9
Grounding ...................................................................................................... Page 2-12
Setting up a Dante Audio-Over-IP Connection .......................................... Page 2-100
5. Connect remote control interface. (optional)
For a full listing of 8700i’s extensive remote control provisions, refer to “Remote
Control Interface Programming” on page 2-61.
Optically isolated remote control connections are terminated in a type DB-25 male
connector located on the rear panel. It is wired according to Figure 2-2.
To select the desired function, apply a 5-12V AC or DC pulse between the appropri-
ate Remote Interface terminals. The (

) terminals can be connected together and
then connected to power common at pin 1 to create a Remote Common. A current-
l12VDC source is available on pin 25. If you use 48V, connect a 2k
 
10%, 2-
watt carbon composition resistor in series with the Remote Common or the (+) ter-
minal to provide current limiting.
In a high-RF environment, these wires should be short and should be run through
foil-shielded cable, with the shield connected to CHASSIS GROUND at both ends.
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