Interpreting the Display
The 1xEV-DO Tx screen is divided into two sections, and the 1xEV-DO Over Air screen is divided into three sections. The extra, third section in the 1xEV-DO Over Air screen shows the OTA PN Scanner results, and appears at the top of the display.
You can switch the OTA PN Scanner On or Off independently in either a 1xEV-DO Tx Analyzer measurement or in a 1xEV-DO Over Air measurement. The presence or absence of the OTA PN Scanner is the main difference between the 1xEV-DO Tx Analyzer screen and the 1xEV-DO Over Air screen.
If you have the OTA PN Scanner display switched On, it appears at the top of the screen. The code domain trace display in the center. The pilot dominance and multipath power parameters are shown to the left of the screen. When you are making Over the Air measurements, awareness of these two parameter values helps you be sure that you are making valid measurements on the sector of interest.
The code domain trace display contains 128 Walsh codes when CDP Type is MAC 128, or 64 Walsh codes when CDP Type is MAC 64. These are shown in a bit-reversed order to represent the combined code channels for the varying data rate traffic channels. The Y-axis labels display the relative power (dB) or absolute power (dBm), threshold level, and dB/division. The X-axis labels display active channel Walsh Code numbers. Active code channels shown on the display include:
The metrics display shows 14 measurement parameters displayed below the CDP display in three columns and five rows-each with a value and units. For more information about the parameters in the metric display, refer to "Metrics Provided by the 1xEV-DO Tx and Over Air Analyzer Measurement"
- Active MAC (Medium Access Control) RPC (Reverse Power Control) channels (shown in orange)
- RA (Reverse Activity) MAC channel (shown in light blue)
- Noise (shown in light gray)
- Unknown (MAC indexes 0 to 3 only) (typically these are displayed in gray, that is, as noise. If they are found to be active, they are shown in light brown)
- Pilot (shown as a red bar, and only when CDP Type is Pilot)
The time reference indicator is at the bottom right. For each indicator the text indicates which time reference you have chosen. A green LED indicates a locked condition, a red "X" indicates an unlocked condition. You must have a valid time references (either from the GPS system, or from an Even Second Clock) to make valid measurements.