Last updated: 2014-11-28
The following settings are only available when the operating mode is TD-SCDMA Test. For the downlink channel level configurations in Active Cell operating mode, see Generator Info.
TD-SCDMA Test DPCH Level specifies the power level at which the downlink DPCH is transmitted. TD-SCDMA Test DPCH Level cannot be set 30 dB below the total RF power.
In the TD-SCDMA Test operating mode, when the CALL SETUP hardkey is pressed, the Downlink Code Channel Power Level window is displayed to show the "current" and "desired" power level of each downlink channel.
All downlink time slots are transmitted with full cell power (including the Downlink Pilot Time Slot, DwPTS). The relative power of the physical channels in one time slot must sum to 100% of the time slot power.
The power levels of DwPCH, P-CCPCH and PICH are all fixed and shown on the Downlink Code Channel Power Level screen.
You can specify the TD SCDMA Test DPCH Level. However, the power levels of DwPCH, P-CCPCH and PICH are fixed in the test set, as the table below.
|
|
DwPCH |
P-CCPCH |
PICH |
|
Power Level (in dB) |
0 |
-3 |
-3.02 |
The DPCHo Level is a calculated value used to balance the relative power levels in a time slot so that they sum to 100%. The Current DPCHo Level indicates the current power level in use and the Desired Level indicates the calculated level. When TD SCDMA Test DPCH Level is changed, the test set re-calculates a DPCHo level in order that the DPCH and DPCHo levels sum to 100% of the time slot power. If the state of TD SCDMA Test DPCH Level is set to Off, the downlink DPCH channel is not transmitted and the DPCHo occupies 100% of the time slot power.
The DPCHo is always active concurrently with the DPCH.
GPIB Commands: CALL:TDTest:DPCHannel:LEVel