Agilent Technologies 8935 series e6380a Manuale Utente
![Agilent Technologies](https://files.manualsbrain.com/attachments/f20ae6efbee7636e6d0d1a481fd9e3847e3caeb5/common/fit/150/50/991587f279eee8cef3aa0a068e5c2f53d86b00e1bf17fbcbf9a87aa49d96/brand_logo.png)
Chapter 5
139
CDMA Measurements - Screens and Control Fields
CDMA Measurements
Code Domain Measurements – IS-95
If you have selected IS-95 only in the INSTRUMENT CONFIGURE
screen, the Code Domain screen will appear as described in this section,
with the Walsh Code ordering following the Hadamard paradigm, with
64 channels, total. These channels are referred to as “I” channels.
screen, the Code Domain screen will appear as described in this section,
with the Walsh Code ordering following the Hadamard paradigm, with
64 channels, total. These channels are referred to as “I” channels.
If you wish to make use of the extended Walsh ordering - Bit Reverse -
as described by the IS-2000 standard, see See “Code Domain
Measurements – IS-2000” on page 142.
as described by the IS-2000 standard, see See “Code Domain
Measurements – IS-2000” on page 142.
The following measurements are displayed on the CODE DOM (code
domain analyzer) screen: power, fast power, timing and phase.
Measurements are selected from the
domain analyzer) screen: power, fast power, timing and phase.
Measurements are selected from the
Measurement
field on the
Main
controls menu.
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.
displayed when any code domain measurement is made. Carrier
feedthrough (CarFT) is also displayed except when fast power is
measured.
Figure 5-5
Code Domain Power
Code Domain Power, IS-95
The Test Set provides two code domain power measurements.
• Absolute code domain power displays the power in each of the 64
Walsh channels, relative to the total power inside a 1.23 MHz
bandwidth centered at the tune frequency. The 64 Walsh channels (0
through 63) are represented by a vertical bar on the analyzer’s
display. To measure absolute code domain power the
bandwidth centered at the tune frequency. The 64 Walsh channels (0
through 63) are represented by a vertical bar on the analyzer’s
display. To measure absolute code domain power the
Ch pwr unit
field on the
CD Setup
menu must be set to
Abs
(see
). Use
the
Marker
controls to move the marker to the Walsh channel (
Walsh
Chan
) you want to measure (see
Code D om ain
Frequency D om ain
0
1
2
3
4
5
6
7
8
9
32
63
User
1
User
3
User
2
Walsh Code
Pilot Paging
Synch
U s e r # 2
U s e r # 1
S yn ch
P a g in g
P ilo t
1.2288 MHz
fre q
O th e r u se rs & n o ise
Frequency Domain
Code Domain