Technical data

80 Chapter 3
1xEV-DO Analyzer and Over Air Test
Optional 1xEV-DO Tx and Over Air Analyzer Measurement Settings
1xEV-DO Analyzer and Over Air
Test
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 below this power
level are considered inactive (or noise), and any code channels exceeding this power
level are considered to be potentially active traffic channels. Any potentially active
traffic channels, that is, any channels exceeding the Active Channel Threshold
Level, must also have a low power variance over time to be considered truly active
channels. A horizontal red line on the screen represents the threshold level. The test
set can set this level automatically, or you can manually enter a value.
In Auto mode the threshold level moves as the noise fluctuates. The threshold level
is set by the test set at an optimal offset above the average noise floor. If you choose
Auto mode, you can alter the auto threshold offset. The recommended and default
setting is 0 dB. A negative value moves the threshold lower (closer to the noise
floor) and is a more aggressive setting that increases the likelihood of interpreting an
inactive channel as active. A positive value moves the threshold higher (away from
the noise floor) and is a more conservative setting that increases the likelihood of
interpreting an active channel as inactive.
In Manual mode the threshold level is fixed and does not move as the noise
fluctuates.
To Set the Active Channel Threshold Level:
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[Setup]