User's Manual Part 1

Tsunami Multipoint Version 1.3 Installation Guide
3. Configure the SU’s IP settings:
º Enter setSUIP <Terminal ID> <IP address> to set the SU’s IP address. Proxim suggests that
you configure each SU with a unique IP address in the same IP subnet as the BSU in Bridging
mode and configure each SU with a specific subnet in IP routing mode.
º Enter setSUSubnet <Terminal ID> <subnet mask> to set the SU’s subnet mask.
4. Repeat Steps 2 and 3 for each SU that you want to add to the Tsunami Multipoint system.
5. Enter dspSU to view the list of SUs that have been added to the BSU’s database.
6. Install the SUs as described in “Chapter 3. Deploying the Subscriber Unit” on page 31.
Configuring the System for Multi Sector Mode
If you are installing the BSU in the same geographical location as other BSUs, i.e., in a location where
one BSU may interfere with another, set the unit to Multi Sector mode; this enables the GPS receiver.
GPS is used to ensure that all BSUs in the same geographical region transmit and receive at the same
time. In additional, the ratio of downlink to uplink slots must be the same for all BSU’s that may
interfere with each other. Together, these eliminate the possibility of a BSU transmitting while a co-
located BSU is receiving. This synchronization is achieved using the timing signal supplied by the GPS
receiver. The GPS receiver needs to see four satellites to obtain an accurate time. Once time has been
initialized, the receiver can keep accurate time even if it sees only a single satellite.
There are two multi-sectors modes; auto-restart and auto-resync. The difference between these modes
has to do with how the BSU synchronizes its timing to gps after an outage. The reader is referred to the
TMP reference manual for more details. To configure the BSU for Multi Sector Mode, use the
setFrameSync command (setFrameSync <0 (Multi-sector with auto-restart | 1 (independent – NOT
multisector) | 2 (multi-sector with auto-resync). Multi-sector mode with auto-resync is the recommended
mod). To turn off Multi Sector Mode, enter setFrameSync 1, indicating Independent (GPS is not used).
Testing the GPS Receiver
The GPS Receiver Test examines the quality of the GPS signal. This test is for use only in the field by
customers who have installed multiple Base Station Units (BSUs) in the same location (with the Frame
Sync parameter set to Multi Sector).
This tool tests the GPS quality for BSUs that receive timing information from GPS satellites.
Note: The BSU must have the GPS antenna connected to receive GPS signals. See “Mounting the GPS Antenna.”
Chapter 2. Pre-Installation Tasks 29
CPN 63179 Issue Date: 01/24/03