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146 Chapter 5
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CDMA Measurements - Screens and Control Fields
CDMA Measurements
Figure 5-12 Code Domain Power, IS-2000, Hadamard Ordering
Time offset (Tm Ofs) and frequency error (Freq Err) are always
displayed when any code domain measurement is made. Carrier
feedthrough (CarFT) is also displayed except when fast power is
measured.
Code Domain Power, IS-2000
The code domain power displays the power in each of the 128 Walsh
channels, relative to the total power inside a 1.23 MHz bandwidth
centered at the tune frequency. The 128 Walsh channels (0 through 127)
are represented by a vertical bar on the analyzer’s display. Use the
Marker controls to move the marker to the channel you want to
measure. Reading the Code Domain Power in IS-2000 mode is slightly
different than in IS-95 only mode. Figure 5-13 illustrates some of the
important parameters. Note that Chan Num is now comprised of two
values: the sumplemental channel (20 in Figure 5-13) and the Walsh
channel ((52) in Figure 5-13).
Figure 5-13 Reading Code Domain Power, IS-2000
Walsh 0
(Pilot)
Set to Marker
Select the Marker
position
Read code domain
power
Marker
Supplemental
Channel
Walsh
Channel
Number of
Channels
that
comprise
the Supplemental
Channel