Using the W-CDMA or W-CDMA (with HSDPA) Over the Air Tool

Using the W-CDMA or W-CDMA (with HSDPA) Over the Air Tool
W-CDMA and W-CDMA (with HSDPA) over the air measurements provide a quick method of verifying W-CDMA or W-CDMA (with HSDPA) transmitter performance. These transmitter measurements can be made on a base station (commonly referred to as a Node B) from the convenience of your vehicle without taking the base station out of service. Over the air measurements are especially useful in maintaining hard-to-access cell sites such as pole top base stations. The W-CDMA Over the Air and W-CDMA (with HSDPA) options (Option 250 - W-CDMA Over Air Test, and Option 245 - HSDPA Analyzer & HSDPA Over Air Test) may also be used to measure signals at a coupled port on the transmitter.
High Speed Downlink Packet Access (HSDPA) was added in Release 5 of the 3GPP specifications. HSDPA was added in an attempt to make the W-CDMA systems more efficient for packet data applications by increasing peak data rates and reducing packet latency. You will need Option 245 - HSDPA Analyzer & HSDPA Over Air Test to make HSDPA-specific measurements, although other W-CDMA measurements can still be made without this option installed on your test set.
This chapter covers Option 250 - W-CDMA Over Air Test installed on its own, and Option 250 - W-CDMA Over Air Test installed together with Option 245 - HSDPA Analyzer & HSDPA Over Air Test.
Where differences exist between using Option 250 - W-CDMA Over Air Test installed on its own, and using it in conjunction with Option 245 - HSDPA Analyzer & HSDPA Over Air Test, these differences are usually called out in this help system. Where the differences are small, however, they are not called out.
Example of a difference that is not called out: a title on a menu can be either W-CDMA Ovr Air or HSDPA Over Air depending on whether or not Option 245 - HSDPA Over Air Test & HSDPA Over Air Test has been installed. The keys under that menu do not change, and only the title of the menu changes. Such differences are not called out here.

CAUTION: To achieve valid over-the-air measurements, the test set must be stationary (not moving). An alternative is to make these measurements from a coupled port at the base station.