Fiber Optic Installation; Audio Setup; Table 1. Maximum Fiber Lengths - Telecast Adder 882i Instruction Manual

Fiber Optic Installation

The installer is responsible for providing the fiber optic cable runs that are
available from Telecast Fiber Systems, Inc. Refer to the Accessory List on page
18 of this manual for the cable and other items required for system installation.
Be sure that the fiber core diameters are compatible with the intended installation
distances as shown in Table 1.
Fiber core diameter
8 micron (single mode)
The units have been configured at the factory for the fiber type with which they
are going to be used. Mark or tag the optical fibers when they are installed,
carefully avoiding the fiber tip, so that their identity is known at both ends. If there
is confusion about the identity of the two fibers, illuminate the end of one fiber
with a flashlight and look for the light at the other end.
WARNING: Do NOT use the Adder 882i optical output for this purpose.
Never look directly into the end of the optical fiber while either end of the
system is operating. Eye damage is possible.
Inspect the fiber ends and clean them with clean, dry compressed air or with
Kim-Wipes and isopropyl alcohol. Fingerprints or other dirt on the optical
connector end surfaces will reduce the received optical signal level.

Audio Setup

The setup switches for line or mic input levels are inside on the mother-board of
the Adder 882i. Setup steps are not required if all inputs are at the factory default
600 W, 0 dB gain, line level. This would include Clear-Com and RTS intercoms.
Setup is required for 4-Wire intercoms if mic level inputs are used, if 5 kW input
impedance is required, or if the optional 10 dB boost/cut is desired on line inputs.
Procedure
1. Determine which inputs will be used for 4-Wire applications where the
10 dB boost/cut can be used.
2. Copy Table 2 and fill in the required I/O characteristics.
3. With the power switch off, take off the top cover of the unit by removing
the #4 flat head screws at each corner.
10
50 micron
62.5 micron
Table 1: Maximum Fiber Lengths
Maximum fiber length
5 km (3 miles)
3 km (2 miles)
10 km (6 miles)