Scans and displays the power of all 32 SYNC‑DL codes in sequential order, including Ec/Io (dB) and Tau (µs). DwPTS Power and Pilot Dominance values are displayed below the table of codes (Figure: TD‑SCDMA/HSPA+ OTA Code Scan). The Scrambling Codes (SC) corresponding to each SYNC‑DL code are also displayed next to each code for easy reference.
Tau Scan
Displays the code power versus Tau in a bar graph format. The horizontal axis (Tau) has dynamic scale. The six strongest SYNC‑DL codes are displayed below the bar graph with their Tau (us) and Ec/Io (dB) values. DwPTS Power and Pilot Dominance values are displayed below the table of the six strongest codes (Figure: TD‑SCDMA/HSPA+ OTA Tau Scan).
DwPTS Pwr
The power in the Downlink Pilot slot, excluding the gap.
Pilot Dominance
Pilot dominance is a measure of the strength of the strongest code compared to the next strongest code in the same channel.
TD‑SCDMA/HSPA+ OTA Tau Scan
Measurement Setup
Refer to the User Guide for selecting the TD‑SCDMA/HSPA+ Signal Analyzer mode.
1. Press the Setup main menu key. Press the Trigger submenu key. The Trigger menu opens.
a. Press the Trigger Type submenu key to toggle through the three trigger types: No Trig, GPS, and Ext. The active state is underlined on the face of the virtual submenu key.
b. Press the Ext Trigger Polarity submenu key to toggle either Rising or Falling trigger edge.
c. If necessary, press the Tau Offset submenu key to specify a Tau Offset value.
d. Press the Back submenu key to return to the Setup menu.
2. Continue with the following setups for the specific OTA measurements.
Code Scan
1. Press the Measurements main menu key.
2. Press the OTA submenu key. The Over‑the‑Air menu is displayed.
3. Press the Code Scan submenu key to activate this measurement view.
Tau Scan
1. Press the Measurements main menu key.
2. Press the OTA submenu key.
3. Press the Tau Scan submenu key to activate this measurement view.
