3GPP2 Signal Analyzer Measurement Guide : EVDO Signal Analyzer : Measurements Menu : Demodulator Menu
 
Demodulator Menu
Key Sequence: Measurements > Demodulator
EVDO Demodulator Menu (1 of 2)
CDP MAC: The first press of this submenu key begins a CDP MAC measurement and also displays an arrow on the soft key (to indicate that a sub menu is available). The Code Domain Power (CDP) MAC view displays all of the Pilot and MAC codes in a color coded graphical format. MAC channels are Walsh despread into 64 sub-channels (physical layer Subtype 0 or Subtype 1) or 128 sub-channels (physical layer Subtype 2).
The bottom half of the CDP graph area shows a zoomed-in view of the code powers. A blue mask behind the zoomed-in area is duplicated in the upper graph to indicate which signals are in the zoom view.
The numerical results displayed in this view are:
Pilot and MAC Power (dBm)
Freq Error (Hz)
Rho Pilot
Data Modulation
Channel Power (dBm)
Freq Error PPM
Rho Overall1
Noise Floor (dB)
The codes are color coded according to the following list:
Reserved Channels in White
Inactive channels in Gray
Reverse Activity (RA) in Red
Active channels alternate between Orange and Yellow
An additional press of the CDP submenu key opens the CDP MAC Menu.
CDP Data: Lists the CDP Data menu. The Code Domain Power (CDP) Data view displays only the data code powers. The display is split into the I (In phase) data and Q (Quadrature phase) data components. Each contains 16 sub-channels.
The numerical results that are displayed in this view are:
Active Data Power (dBm)
Rho Pilot
Max Data CDP
Data Modulation Type
Rho Overall1
Min Data CDP
Demodulator Menu (Continued)
EVDO Demodulator Menu (2 of 2)
MAC CDP Table: This screen shows the power of the codes in a tabular format. The table displays the following 4 columns:
Code number
Status: RA, Active, Pilot, Page, Sync, All Traffic (Color Coded rows)
Power (in dB, relative)
Power (in dBm, absolute)
Code Utilization is displayed in percent (%) at the bottom of the table. It is a number indicating how many codes are used by a particular user (traffic).
Modulation Summary: Pressing this submenu key displays a summary of all the modulation-related numerical measurement results in a table format, with rows for: Pilot & MAC Power, Channel Power, Rho Pilot, Rho MAC, Rho Data, Rho Overall1, Rho Overall2, Data Modulation, Noise Floor, RMS Phase Err, Freq Error, and Tau.
Back: Returns to the Measurements Menu.