Anritsu 3GPP, Measurement Manual

Page: 52 / 244

3-6 Over-the-Air Measurements W-CDMA/HSPA+ Signal Analyzer
3-20 PN: 10580-00234 Rev. Y 3GPP MG
3-6 Over-the-Air Measurements
OTA Setup
In Over-the-Air (OTA) mode, the instrument is not connected to the node B equipment. The
OTA screen displays the six strongest scrambling codes as bar graphs. Displayed underneath
the bar graphs are the related scrambling code number, CPICH, Ec/Io, Ec, and pilot
dominance in the table format.
In Over-the-Air measurement, the Scrambling Code can be set to Auto to automatically
measure and display the six strongest scrambling codes, or Manual, to look for the set
scrambling codes.
The OTA measurement screen can be locked by pressing the
Code Lock On/Off
submenu key.
The
Display Unit
submenu key can be used to display the OTA bar graph by selecting
CPICH
or
Ec/Io
. The default display is CPICH. The
Sort By
submenu key can display the scrambling
codes sorted by Power or Code.
OTA Procedure
1. Connect the appropriate antenna to the
RF In
connector to make OTA measurements.
2. Set the measurement frequency using one of the methods listed in the User Guide
3. Press the
Measurements
main menu key.
4. Press the
OTA
submenu key to activate the Over-The-Air submenu.
5. Press the
OTA
key again to open the OTA menu.
6. Press the
Scrambling Code
submenu key and select Auto to automatically detect the six
scrambling codes ( Figure 3-11 ).
7. To only look for specific scrambling codes, press the
Scrambling Code
submenu key to
highlight
Manual
, then use the
Manual Code
submenu key to select the specific code and
the
On/Off
submenu key to turn the selected code on or off. The
Code Lock
submenu key
locks the code, so that the code will not change with each update.
Refer to “Over-The-Air Menu” on page 3-38 for a description of OTA measurement submenus.
Note
Press Reset to activate the OTA measurement in a different location for accurate
results.