Codogram displays the code power levels over time. Two graphs are displayed on the screen, the top one displays all the selected OVSF codes and the bottom one displays the selected OVSF zoom codes.
Codogram 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. 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.
5. 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.
6. 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.
7. Press the Threshold submenu key to manually set the Threshold level which determines which codes are active. The default value is –30dB.
8. Press the Measurements main menu key.
9. Press the Demodulator submenu key to list the Demod menu.
10. Press the Codogram submenu key to activate the Codogram measurement.
11. If needed, press the Codogram key again to list the Codogram menu and set the zoom and test time parameters for the measurement.
12. Press the Zoom submenu key to select the appropriate zoom level. The Zoom key toggles between 32, 64, and 128.
13. Press the Zoom Start submenu key to manually enter the zoom start code.
14. Press the Total Time or Single Sweep Time submenu key to set the required time.
15. Press the Back submenu key to go back to the Codogram measurement.
Note
The blue color block on the Codogram screen represents the selected zoom codes and the same codes are displayed in the zoom screen. Save the data before making any measurements, otherwise the data will be lost.
