User's Manual

3. Installing the Hardware
EAC-2100 Manual: (Draft, 02/01) Page 3-6
3.3 Installing the Antennas
Antennas should already have been mounted, as described in Section 2.4.2, in locations
that meet the following requirements:
• Minimum signal level from any donor cell: -75 dBm or greater at the D1 antenna
connector. (See Section 2.4.2 for multi-hop and multi-donor unit variations.)
• Physical separation: M1 and M2 antennas separated at least 10 feet (3 m)
horizontally or 3 feet (1 m) vertically.
• Isolation between D1 and M1, and between D1 and M2:
− >75 dB
• Modem antenna: Placed so as to minimize interference with the M1, M2, and D1
antennas (minimum 60 dB isolation required). The minimum signal level required
for proper operation is -100 dBm. Alternatively, the data radio may be connected
to the internal donor duplexer sampling port. However, make sure signal level is
enough to make up for the 20 dB coupling loss.
Antenna installation involves connecting the antennas to the EAC-2100, measuring
isolation and signal level, and making needed adjustments.
3.3.1 Connecting the Antennas
Connect the antennas to the EAC-2100. All antenna connectors (type 7/6
DIN) are located on the bottom he cabinet, arranged as shown in Figure 3-5.
Figure 3-5. Antenna Connectors
(NOTE: ADD DRAWING OF BOTTOM HERE)