Technical data

564 Chapter 19
W-CDMA or W-CDMA (with HSDPA) Analyzer
W-CDMA or W-CDMA (with HSDPA) Analyzer Measurement Settings
W-CDMA or W-CDMA (with HSDPA)
Analyzer
NOTE CDP measurements will only meet Agilent’s published specifications when you are
using either Medium or Slow measurement speeds.
Enabling PICH and S-CCPCH
In 3GPP W-CDMA or W-CDMA (with HSDPA), two optional control channels are
provided: S-CCPCH and PICH. These can have different spreading codes and
spreading factors. For this reason, the E7495A/B only identifies them as PICH and
S-CCPCH channels when enabled by you. The test set defaults to the disabled (off)
state. In the default mode, the test set still shows the energy by assuming a spread
factor of 512 in the Full view and Zoom view graphs. Either the actual spreading
factor or spreading code must be entered manually before the test set will display the
PICH or S-CCPCH parameters with their correct spread factors and OVSF codes.
To enable the PICH and S-CCPCH
Table 19-1 Slots and Frame Alignment at Different Meas. Speeds
Meas Time Number
of Slots
W-CDMA (HSDPA Off) W-CDMA (HSDPA On)
Slow 2 Aligned to Scramble Sequence Frame (CPICH = 0)
Medium 2 Random Slot Aligned to the start of the
next sub-frame boundary
Fast 2 Random Slot Random Slot
Step Notes
1 [Setup]
2 On [Meas Time] select
Slow, Medium, or Fast.
Each time you press this softkey, the selected
option changes.
Step Notes
1 [Setup] The same procedure is used for both settings.
S-CCPCH is used in this example.
2 [S-CCPCH] Each time you press this softkey, the selected option
changes.