Nortel DCT1900 Technical Product Manual page 228

Technical Product Manual - DCT1900
Installation Instructions, Base Station – KRC 101 1371
5. Enter the measured delay value into the correct column on the Base Station identification and
Location chart (refer to "Table 21-1, Example of Base Station Administration" in Chapter 21)
along with the Base Station number and location.
6. Repeat the delay measurement for all Base Stations connected to the CLU or SLU.
7. Re–connect the connectors to the CLU or SLU.
If applicable, repeat the delay measurement for the Base Stations connected to the other CLUs
and SLUs.
16.4 Installation Criteria
The Base Station should always be mounted such that the antennas are vertical with respect to
the floor or ceiling. Two types of antennas are available to facilitate the correct orientation of the
Base Station. One set is a vertical antenna for wall mounting of the Base Station and the other set
is a right angle antenna that allows the Base Station to be mounted on the ceiling.
The Base Station should never be mounted above the ceiling tiles as this reduces the coverage
area. Base Stations should not be mounted near large metal objects, such as pipes or air
conditioning conduits. Do not mount Base Stations directly on I-Beams or lamp poles, as these
objects tend to distort the RF field which reduces the effectiveness of the RF coverage area. Use
the Base Station outdoor wall mounting kit (see Paragraph 16.3.4) or a factory hanging device
(see Paragraph 16.3.2). Do not mount the Base Station more than 20 ft. high.
Note:
When mounting Base Stations near to each other to provide additional call capacity, it is necessary
to maintain at least 40 inches spacing between Base Stations.
The location where the Base Station is to be mounted is determined either by a previous site
survey or by the needs of the customer when adding to a system.
The following is a recommended order of installing a Base Station:
- Base Station cable delay measurement
- Mounting the Base Station - indoor
- Mounting the Base Station - outdoor
- Connecting the Base Station plug to the cable
16.5 Connecting the Base Station Plug to the Cable
Note:
Make sure that there is no power applied to the Base Station cable on which you are working.
Either the power cable or the signal cable on the front of the CLU/SLU should be disconnected
before connecting the cable to the RJ45 plug. -48V DC for powering the Base Stations is provided
between the data pairs and on the EPP wires.
1. Cut the Base Station cable to the correct length and connect the cable to the RJ45 Modular
Jack (see Fig. 16-2 Connector Pinning).
2. If an external power supply or AC/DC converter is used to power the Base Station, it is
recommended that this device be located in the last IDF in the signal path. Connection of the
output voltage from these devices will be made to the EPP pairs going out to the Base Station.
16-6
Install-DCT1900/R8/mw
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