3-6 Over-the-Air Measurements W-CDMA/HSPA+ Signal Analyzer
3-20 PN: 10580-00234 Rev. T 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 display the Over-The-Air submenu.
5. Press the Scrambling Code submenu key and select Auto to automatically detect the six
scrambling codes (Figure 3-11).
6. 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.
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