Technical data

232 Chapter 8
CDMA Over Air
Optional CDMA Over Air Measurement Settings
CDMA Over Air
Setting the PN Increment
The PN Increment allows you to choose the increment step for the PN Offset.
Typically the PN Increment is set to 1 when measuring CDMA transmitter
performance while connected to the base station via RF cable.
The PN Increment field enables you to search based on a step size of your choice. If
PN Increment = 1 (default), the search will step through PN values by one PN at a
time. If PN Increment = 5, it will step through PN values 0, 5, 10, and so on. The
Measured PN displayed will be a multiple of 5, even if the actual PN is not a
multiple of 5. If you know that all base stations in the area have fixed increments,
then set the PN Increment field to that increment value. If you don’t know, then use
the default value of 1.
Setting the Transmitter Reference Level
You can set the CDMA transmitter reference level to display either relative power
(dB) or absolute power (dBm). The test set defaults to relative. The top graticule
(horizontal line) represents the total power in the CDMA channel. The scale per
division is set to 5 dB per division.
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.
Step Notes
1. [PN Inc]
2. Enter the PN Increment using
the numeric keypad.
The maximum value you can enter is 15.
3. [Enter] Notice (and verify) that the number you
entered for your chosen PN Increment
number appears below the
PN Inc text on the
corresponding button.
Step Notes
1 [Level/Location]