User`s guide

Chapter 13 317
W-CDMA Digital Modulation for Component Test
W-CDMA Concepts
If the Scramble Offset field is zero, then the scramble code is in the primary set. Any
non-zero entry enables the secondary set. The Scramble Offset field has a range of
0 through 15.
The Scramble Type field has three modes: Standard, Right Alternate, and Left Alternate.
The standard scramble type has a value of zero and does not contribute to the scramble code.
Selecting the right alternate adds 16384 to the actual scramble code, whereas the left
alternate adds 8192.
Scramble Codes with Standard Scramble Type
A primary scramble code is the product of the Scramble Code field entry and 16. Therefore,
the primary scramble code set contains all multiples of 16 from 0 through 8176.
A secondary scramble code is the sum of the non-zero Scramble Offset field entry and the
primary scramble code. The secondary scramble code set uses the numbers in between the
multiples of 16.
Thus, all numbers from 0 through 8191 are available for scramble codes when using the
standard scramble type.
Refer to the following for examples of scramble codes generated with the primary and
secondary sets:
Where n = scramble code
i = scramble code field input
k = scramble offset field input
m = scramble type field input
A: Primary set B: Secondary set
i = 6 i = 8
k = 0 k = 7
m = 0 m = 0
n = 96 n = 135
n 16 i×()km++=