User's Manual

INSTALLATION AND MAINTENANCE MANUAL
Tsunami FAMILY
SPREAD SPECTRUM RADIOS
SEPTEMBER 1999
SECTION 3: INSTALLATION & ADJUSTMENTS PAGE 3-25
3.12.2 Spreading Code Selection
The spreading code is the pseudo-random chip sequence that is mixed with the data to produce
the spread spectrum signal. The spreading code is generated by the Tsunami radio internally.
Different codes can be selected using the DIP switches on the Tsunami radio rear panel.
The spreading code must be the same for both ends of a radio
link.
The spreading code has no effect with the Model 31185 (8Mbps)
3-channel Tsunami.
Spreading codes are all set in the factory to code 1. Should the code need to be changed, then
both ends of the link must be changed.
Changing the spreading code is an out-of-service adjustment. There are two DIP switch segments
on SW3 located on the rear panel which select the spreading codes. See Figure 3-7 for DIP
switch segment settings.
Figure 3-7: Spreading Code Selection