Multiple-View Display
The W-CDMA or W-CDMA (with HSDPA) Over the Air analyzer multiple-view screens are divided into two sections in the Zoom view (default) and five sections in the Full view as follows:
The frequency reference indicator is at the bottom right corner of the screen, the time reference indicator at the bottom left. For each indicator the text indicates which reference you have chosen. A green LED indicates a locked condition. A red "X" indicates an unlocked condition.
- Zoom view: The top-left graph (Code Domain Trace View) shows the power in all 512 OVSF (Orthogonal Variable rate Spread Factor) Code Channels. Code channels have variable width depending on the Spread Factor for the channel. SF512 has 512 code channels with each channel 1 unit in width. SF256 has 256 channels with each channel 2 units in width. The width continues to double for SF128, SF64, and so forth. 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 numbers.
- The light blue section on the bottom bar corresponds with the section displayed in zoom view (described below). The red line across the graph represents the active channel threshold. The control channels are in the color indicated in Channel Descriptions and Acronyms, below.
- Active code channels shown on the display include:
- Red - Common Pilot Channel (CPICH)
- Yellow - Primary common control channel (P-CCPCH)
- Green - Secondary common control channel (S-CCPCH); if enabled under the Setup menu
- Light blue - Paging Indication Channel (PICH) if enabled under the Setup menu; also P-SCH
- Purple - S-SCH
- Orange - Active DPCH traffic channels
- Light yellow - Active HS-PDSCH (QPSK and 16QAM) traffic channels
- Noise (light gray)
- Full view: The top-left graph (Code Domain Trace View) shows the power in the first half of the OVSF channels (SF512 channels 0 - 255). The lower-left graph shows the power in the other half of the channels (SF512 channels 256-511). The code channel appearance and colors are the same as described above.
- Zoom view: The lower-left graph (Zoom View) shows the power in the section of the graph highlighted in light blue in the top-left graph, a section of 32, 64, 128, or 256 codes.
- Zoom and Full views: The top-right graph (Strongest Pilot View) contains the pilot dominance and multipath power parameters. This shows the strongest Scrambling Codes seen by the test set. Active codes, that is, codes that reach or exceed the Threshold Level, are indicated by having their Scrambling Code displayed on the X-axis. Codes that do not reach the Threshold Level are considered inactive, and do not have their Scrambling Code displayed.
- The Scrambling Code of interest should clearly dominate. The display is useful when positioning the test set to see what other base stations or sectors need to be avoided. Awareness of these two parameter values helps you be sure that you are making valid measurements on the sector of interest.
- Full view: The lower-right graph (Control View) shows the power in the control channels (see Channel Descriptions and Acronyms, below).
- The delta power (relative to CPICH) is shown in the middle of the control bars.
- Zoom and Full views: The bottom portion (Metrics View) displays 15 measurement parameters for the current measurement, displayed in three columns and five rows-each with a value and units. For more information about the metric display, refer to "Metrics Provided by the W-CDMA or W-CDMA (with HSDPA) Over Air Measurement"
NOTE: In W-CDMA or W-CDMA (with HSDPA), the P-SCH and S-SCH are not assigned OVSF codes and therefore do not appear in the code domain trace view. The E7495A/B features a control channel graph view (Control View) for these two Sync channels to measure power only, since there are no OVSF codes associated with these channels. They have special non-orthogonal codes and are only On 10% of the time
Channel Descriptions and Acronyms