The test set's base station emulator provides control over the following RF power levels:
To access the cell power parameter using the test set's front panel, see How Do I Change Call Parameters? .
To access the AWGN power parameter using the test set's front panel, see How Do I Change AWGN Power Levels? .
These power levels are displayed in the Generated Power Level Information table (see Generated Power Level Information (for Test Application) ).
For the lab application , the test set has the ability to simulate two individual base stations, referred as Cell 1 power and Cell 2 power. The total RF power consists of Cell 1 power, Cell 2 power and the AWGN power if their states are on (see Generated Power Level Information (for Lab Application) ). The Cell 1 power used in the lab application is identical to the Cell power used in the test application. For more information about Cell 2 power which is only available in the lab application, see Configuring Cell 2 Used for Soft/Softer Handoff .
For the lab application , an external AWGN value is displayed when the test set is configured to generate faded forward channel signals with AWGN. This setup requires a rear panel digital bus connection to an external PC running Baseband Studio software. See Digital Bus Information for details.
The test set includes commands to set the desired cell power and AWGN power levels. You may also query what you've set these desired power levels to, as well as query what the total RF power will be based on your desired cell power and AWGN power levels. See RF Power Levels .
The test set also includes commands to query the current level of cell power, AWGN power, and total RF power. See RF Power Levels . These CALL:STATus commands are query only. They return values that indicate the test set's actual hardware settings and hardware status. Actual hardware settings can differ from the desired level you've set. 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:AWGNoise:POWer?" will return the same value as "CALL:STATus:AWGNoise:POWer?" when no error conditions exist.
Current Level | Desired Level | |
---|---|---|
Cell Power | ||
AWGN Power |
CALL:STATus:AWGNoise[:INTernal]:POWer[:AMPLitude][:SELected]? |
CALL:AWGNoise[:INTernal]:POWer[:SAMPlitude]<[:SELected]|:DIGital2000|:DIGital95> |
Total RF Power |
CALL:TOTal:POWer[:AMPLitude][:SELected]? (query only) |
The range of values that you can set these power levels to differs from the actual hardware range of the source. This is due to compensation for path loss between the test set RF output port and the mobile station antenna connector (see Amplitude Offset ).
For example, if you enter a value of -30 dBm for desired CW cell power, this indicates that you want -30 dBm of power at the mobile station antenna connector. So, if you have indicated an amplitude offset of -3.5 dB exists between the test set's RF In/Out port and the mobile station antenna connector, the source will actually have to output -26.5 dB in order to deliver -30 dB to the mobile station's antenna connector. Thus, with an amplitude offset of -3.5 dB, the settable range of CW cell power is -130.5 dB to -13.5 dB. The actual power range at a given time is defined by adding the value of the associated amplitude offset to the actual hardware range. If you select an invalid combination of power levels and amplitude offsets, an error message will appear.
Actual Hardware Range with Amplitude Offset = 0 (RF In/Out Port) |
Actual Hardware Range with Amplitude Offset = 0 (RF Out Only Port) |
||
---|---|---|---|
-119 dBm to -2 dBm | |||
How Do I Change Call Parameters?
How Do I Change AWGN Power Levels?
Configuring Forward Channel Power Levels and Walsh Codes
Troubleshooting Setting Power Levels