W-CDMA/HSPA+ Signal Analyzer 3-5 Demodulator
3GPP MG PN: 10580-00234 Rev. T 3-15
Code Domain Power (CDP) Procedure
1. Set the measurement frequency using one of the methods listed in the User Guide.
2. Press the Setup main menu key.
3. Press the Scrambling Code submenu key to select Auto so that the scrambling code is
automatically detected.
4. The instrument has automatic external reference frequency detection or, if equipped,
activate GPS and synchronize the instrument to High Internal accuracy.
5. Connect the external reference to the RF In BNC connector and wait for the unit to
recognize the external reference and lock up to it. Refer to the User Guide for additional
information.
6. Press the S-CCPCH Spread submenu key to manually set the S-CCPCH spreading.
The default S-CCPCH spreading factor of 256 will be displayed in all the views. Set the
S-CCPCH spreading factor to show accurate results.
7. Press the S-CCPCH Code submenu key to enter the correct S-CCPCH code. The default
S-CCPCH code of 3 will be displayed in all the views. Set the S-CCPCH code to show
accurate results.
8. Press the PICH Code submenu key to enter the correct PICH code. The default PICH
code of 16 will be displayed in all the views. Set the PICH code to show accurate results.
9. Press the Threshold submenu key to manually set the Threshold level which determines
which codes are active. The default value is –30 dB.
10. Press the Measurements main menu key.
11. Press the Demodulator submenu key to activate the demodulator menu.
12. Press the CDP submenu key to activate the CDP measurement.
13. Press the CDP submenu key again to activate the zoom function.
14. Press the Zoom submenu key to select the appropriate zoom level. The Zoom key toggles
between 32, 64, and 128.
15. Press the Zoom Start submenu key to manually enter the zoom start code.
16. Press the Back submenu key to go back to the CDP measurement.
Note
The blue color block on the CDP screen represents the selected zoom codes and
the same codes are displayed in the zoom screen.
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