Technical data

Chapter 7 195
CDMA Analyzer
Optional CDMA Tx Analyzer Measurement Settings
CDMA Analyzer
represents the threshold. 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. In 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:
Setting Measurement Time
The measurement time setting allows you to alter the speed at which measurements
are made. Three choices exist: Slow, Average, and Fast. The test set defaults to
Average.
Slow measurement time provides a more accurate measurement at the expense of
time.
Fast measurement time provides a quicker measurement at the expense of accuracy.
Average measurement time strikes a balance between measurement speed and
accuracy.
Step Notes
1. [Setup]
2. On [Thresh Lvl] select
Auto or Manual.
Each time you press this softkey, the selected
option changes. If you choose Manual, you must
enter the threshold you want using the numeric
keypad, then press [dB].
3. [Auto Thres Offset] The default value is 0 dB. Optionally, you can
enter a negative (more aggressive) or positive
(more conservative) value, then press [dB].