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Last updated: October 28, 2004
This section is only applicable to the lab application.
Supporting soft and softer handoffs in the test set requires simulation of a second CDMA base station simulator (Cell 2). Cell 2 is implemented with only the channels (see Generated Code Channel Information for Cell 1 and Cell 2 ) required to exercise the soft and softer handoff functionality of a CDMA mobile station. For more Cell 2 features in soft/softer handoff, see Cell 1 and Cell 2 Used in Soft/Softer Handoff .
| F-Pilot | F-Pilot | F-Pilot | |
| F-Sync | F-FCH/Traffic | F-Traffic | |
| F-Paging | F-OCNS | F-OCNS | |
| F-Traffic | |||
Setting Cell 2 Power, such as power range, rules, current level and desired level) are similar to the Cell Power (cell 1) settings. The test set's total RF output power is a combination of the power of cell 1, cell 2 and AWGN power:
Total RF Power (dBm/1.23 MHz) = [Cell 1 Power + Cell 2 Power + AWGN Power] (dBm/1.23 MHz)
(see Configuring Cell Power and AWGN Power Levels for more information about cell power and AWGN power)
For how to change Cell 2 power to verify the mobile station soft/softer handoff behavior, see .
The test set includes commands to set the desired Cell 2 Power. You may also query the desired power level settings.
The test set also includes commands to query the current level of cell 2 power. This CALL:STATus command is query only. It returns a value indicating the test set's actual hardware settings and hardware status. Current hardware settings can differ from the desired level you've set, most frequently due to an error condition. When no error conditions exist, the commands used to set the desired level will return the same results as the commands used to query current level. For example, "CALL:CELL2:POWer?" will return the same value as "CALL:STATus:CELL2:POWer?" when no error conditions exist.
| Current Level | Desired Level | |
|---|---|---|
| Cell 2 Power |
Setting Cell 2 code channel levels (such as current level, desired level, OCNS calculation) are similar to those for Cell 1. See Setting Code Channel Levels and Walsh Codes .
To set the Cell 2 code channels from the front panel, see How Do I Change Generator Information? .
The following table contains a list of GPIB commands controlling cell 2 code channels.
| Command | Purpose | |
|---|---|---|
| CALL:CELL2:PILot | Sets Cell 2 F-Pilot Level. | |
|
Cell 2 F-Traffic Level (IS-95 system) |
CALL:CELL2:TRAFfic | Sets Cell 2 Traffic Level (IS-95). |
| CALL:CELL2:FCHannel | Sets Cell 2 F-FCH/Traffic Level (IS-2000). | |
| CALL:CELL2:DELay | Sets Cell 2 Delay (baseband channel relative to Cell 1). | |
| Cell 2 OCNS Level | CALL:CELL2:OCNSource |
The Cell 2 F-OCNS/OCNS level is a calculated value and can only be queried. The F-OCNS value is calculated to provide a summing value that results in a total code channel value equalling 100% of cell 2 power. |
| Queries current level and states of Cell 2 Power, Cell 2 F-Pilot code channel, Cell 2 F-FCH/Traffic code channel and Cell 2 OCNS. Queries soft/softer handoff state. |
The Cell 2 closed loop power control, together with cell 1 closed loop power control, is used to verify that the mobile station responds correctly to more than one power control subchannel during soft/softer handoffs. See for details.
The closed loop power control bit patterns for Cell 2 (Cell 2 Rvs CLPC) are:
The Cell 2 Rvs CLPC (cell 2 reverse closed loop power control) bit patterns can be set using the CALL:CELL2:CLPControl commands:
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