EVDO demodulator measurements include, CDP MAC, CDP Data, MAC CDP table, and Modulation Summary. To demodulate EVDO signals, connect the instrument to the base station by using the following setup instructions:
1. Press the Setup key to open Setup menu.
2. Press the PN Setup submenu key and choose the trigger type: No Trigger (No Trig), GPS, or External (Ext).
3. Press PN Search Type submenu key to toggle between Auto and Manual search.
Note
If Manual Search is selected, then press Manual PN Offset submenu key and enter the PN value manually.
4. Press Back to go to the previous menu.
5. Press the Walsh Codes submenu key to choose 64 codes or 128 codes.
6. Press the Measurement main menu key to open the measurements menu.
7. Press the Demodulator submenu key to activate the Demodulator measurements menu.
CDP MAC Setup
8. Pressing this submenu key displays the CDP MAC codes (Figure: EVDO CDP MAC). The lower part of the screen displays the zoom codes.
EVDO CDP MAC
From the Demodulator menu, use the following procedure for CDP MAC measurements:
1. Press the CDP MAC submenu key to display MAC codes.
2. Press the CDP MAC submenu key again to display the CDP MAC submenu key menu.
3. Press the Zoom submenu key and select 16 codes, 32 codes, or 64 codes.
4. Press the Zoom Start submenu key and enter the desired zoom starting code.
5. Press CDP Units submenu key to select Relative power (in dB) or Absolute Power (in dBm) for the y-axis in the graphic display.
Marker Setup (Activating Markers)
Note
Markers are only available in Channel Spectrum measurements.
1. Press the Marker main menu key to display the Marker menu.
2. Press the Marker submenu key to select the appropriate marker (1 through 6). The underlined marker number is the currently selected marker.
3. Press the On/Off submenu key to toggle the selected marker On or Off.
4. Press the Marker Table submenu key to display the Marker table. The marker table is displayed on the measurement screen below the CDP measurements table.
CDP Data Setup
CDP Data displays the data I (In phase) and Q (Quadrature phase) codes (Figure: EVDO CDP Data).
EVDO CDP Data
From the Demodulator menu, use the following procedure for CDP Data measurements:
1. Press the CDP Data submenu key to display the codes.
2. Press the CDP Data submenu key again to display the CDP Data submenu.
3. Press the CDP Units submenu key to select Relative power (in dB) or Absolute power (in dBm).
MAC CDP Table Setup
The MAC CDP Table View displays all of the active codes in a tabular format. From the Demodulator menu, press the MAC CDP Table submenu key to display the Code Domain Power table view (Figure: EVDO MAC CDP Table).
EVDO MAC CDP Table
EVDO Modulation Summary Setup
The EVDO modulation summary view displays EVDO critical RF and demodulator measurements in tabular format. From the Demodulator menu, press the Modulation Summary submenu key to display the summary of measurements (Figure: EVDO Modulation Summary).
