Anritsu 3GPP, Measurement Manual, Page: 38 / 244

3-3 General Measurement Setups W-CDMA/HSPA+ Signal Analyzer
3-6 PN: 10580-00234 Rev. Y 3GPP MG
Threshold Setup
The threshold level is an advanced setting that can be set to indicate which codes are
considered active. In the Code Domain Power screen, the threshold level is indicated by a
horizontal dotted red line. 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.
To set the threshold level:
1. Press the
Setup
main menu key, then press
More
.
2. Press the
Threshold
submenu key and select
Auto
or
Manual
.
3. To set the threshold level manually, press the
Manual Threshold
submenu key and use
the rotary knob, arrow keys, or the numeric keypad to change the value. When entering
a threshold using the keypad, the screen menu will show the Units key. Press the
dB
submenu key or the
Enter
key to set the entered threshold.
Filtered versus Unfiltered Power
The ACLR measurement uses the filtered channel power to determine the ACLR values and
it is listed as filtered on the display. In all other screens the unfiltered channel power is
displayed as channel power.