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Chapter 5 175
CDMA Measurements - Screens and Control Fields
Control Fields for CDMA Measurements
Walsh Chan
This field selects the Walsh channel to which to move the marker (IS-95
only mode). The marker can be moved by either entering the Walsh
channel number using the keypad, or by using the cursor-control knob.
Screens on which this field is present
COD DOM (Code Domain Analyzer, IS-95 only): marker controls menu
Walsh Order
This selectable IS-2000 Code Domain display field shows the Walsh
order of the currently selected channel. The Walsh order represents the
number of bits used to specify a selected channel (which also
determines channel size). Walsh order 7 (the highest order), will
generate a set of 128 distinct values, or channels of size 1. Walsh order
3, comprised of code values of 3 bits each, will generate 8 distinct values
of channel size 16. The Walsh order (or channel size) indicates how
many channels are used to generate the signal. The lower the Wash
order, the larger number of channels are used to generate the signal. A
lower Walsh order, while using up bandwidth, can accommodate a
larger amount of data, resulting in a higher data rate.
Lower Walsh orders are usually reserved for data transmission, while
higher Walsh orders are used for voice transmissions.
Screens on which this field is present
CODE DOM (Code Domain Analyzer, IS-2000 only): Complex Power
measurement.