Technical data

194 Chapter 7
CDMA Analyzer
Optional CDMA Tx Analyzer Measurement Settings
CDMA Analyzer
division is set to 5 dB per division by default, but you can change it if you wish.
If the reference level is set to relative, the reference level is relative to the total
power (in dB) in the CDMA channel. If the reference level is set to absolute, the
reference level displays the actual power (in dBm) in the CDMA channel.
To Set the CDMA Transmitter Reference Level:
NOTE The insertion loss of the test cable and high power attenuator must be accounted for
to obtain accurate CDMA power measurements such as channel power and pilot
power. The insertion loss of the test cable/attenuator combination are accounted for
as the RF In Loss, which is an offset applied to the power measurements by the test
set.
Setting the Active Channel Threshold Level and Auto Threshold
Level
The active channel threshold level is an advanced setting that can be set to indicate
which code channels are considered active. Any code channels exceeding this power
level are considered active traffic channels and any code channels below this power
level are considered inactive (or noise). A horizontal red line on the screen
Step Notes
1. [Level/Location]
2. On [Reference] select
Abs or
Rel.
Each time you press this softkey, the selected
option changes.
3. [RF IN Loss]
4. Enter the RF In Loss using
the numeric keypad.
If you are using a cable and attenuator
connected to the base station power amplifier,
enter the combined cable and attenuator RF In
Loss here. The RF In Loss can be obtained by
measuring the Insertion loss. See “Two Port
Insertion Loss” on page 123.
Note: If data had been previously entered in
[RF IN Loss], that data will be lost and
replaced by the value you enter here.
5. [dB]