Simulating Indoor External Antennas With The Cdt; Using Coaxial Cable And An External Antenna; Changing The Cell Boundary Value - Nortel Meridian Companion Reference Manual

For each cell center requiring indoor external antennas, it is best to plan for
two, four, six or eight indoor external antennas. Connect each pair of indoor
external antennas at a cell center to the same Base Station.
If you connect only one radio to an external antenna serving the same cell
center, it is best to disconnect the other radio. If, with external antennas, you
have two radios in the same Base Station serving different cells, users in the
area could have poor audio links and could drop their calls.

Simulating indoor external antennas with the CDT

Use one of the following methods to plan a cell requiring external antennas.

Using coaxial cable and an external antenna

Use this method when an external antenna and coaxial cable are available for
planning.
When using a CDT transceiver with the coaxial cable and external antenna, set
the CDT to external antenna and a cell boundary value of 6 dB higher than the
value given in Table 4 on page 19. For example, -67 dBm is 6 dB higher than
-73 dBm. The additional 6 dB is required because external antennas do not
have antenna diversity.
For more information on this method, see "Base Stations" on page 5.

Changing the cell boundary value

Use this method when the external antenna and cable are not available for
planning.
Calculate a new cell boundary value from the antenna's gain, the coaxial
cable's loss, and the cell boundary value given in Table 4 on page 19. Set the
Appendix B: Using indoor external antennas Page 91 of 102
Meridian Companion Site Planning Reference Manual