Real Time
PRACH Settings
These settings control the real-time baseband and W-CDMA functionality.
For more information, refer to the Multi PRACH Settings tab and to the PRACH Structure tab.
PRACH Settings Configuration Summary Table
This section defines the Settings Current and Apply Needed buttons. Only one button is available at any time. These buttons are available in all of the W-CDMA/HSPA+ Uplink's tree nodes.
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This button indicates that the current real-time settings have been applied to the instrument. No action is required.
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This button indicates that the instrument settings are not current and need to be updated to be applied to the instrument. Click this button to update the instrument's settings.
[:SOURce]:RADio:WCDMa:TGPP[:BBG]:ULINk:APPLy
[:SOURce]:RADio:WCDMa:TGPP[:BBG]:ULINk:APPLy?
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Begins the PRACH transmission. This button is active when the PRACH Start Trigger Source is set to Trigger in the PRACH node.
[:SOURce]:RADio:WCDMa:TGPP[:BBG]:ULINk:PRACh:TRIGger[:SEND]
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1. General Settings
PRACH Generation Mode
Choice: Single|Multiple
Default: Single
Sets the PRACH generation type.
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Single
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This choice generates a single PRACH.
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Multiple
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This choice generates up to eight PRACHes.
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[:SOURce]:RADio:WCDMa:TGPP[:BBG]:ULINk:PRACh:MODE[:SELect] SINGle|MULTi
[:SOURce]:RADio:WCDMa:TGPP[:BBG]:ULINk:PRACh:MODE[:SELect]?
2. Transmission Settings
Number of PRACH
Range: 1 to 2147483647 | Infinity
Default: 1
Sets the repetition number of PRACH (Preamble + Message part).
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Infinity
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This choice means the repeating number will continue while the PRACH mode is selected and the start trigger is ignored.
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If the parameter set by the following command is changed while the signal is active, the :ULINk:APPLy command or Apply Needed () button must be executed for the change to occur.
[:SOURce]:RADio:WCDMa:TGPP[:BBG]:ULINk:PRACh[:SINGle]:NUMBer <val>|INFinity
[:SOURce]:RADio:WCDMa:TGPP[:BBG]:ULINk:PRACh[:SINGle]:NUMBer?
Number of PRACH (Multiple PRACH Mode)
Range: 1 to 2147447836 | Infinity
Default: 1
Sets the repetition number of PRACH (80 ms Multiple PRACH configuration).
If the parameter set by the following command is changed while the signal is active, the :ULINk:APPLy command or Apply Needed () button must be executed for the change to occur.
[:SOURce]:RADio:WCDMa:TGPP[:BBG]:ULINk:PRACh:MULTi:NUMBer <val>|INFinity
[:SOURce]:RADio:WCDMa:TGPP[:BBG]:ULINk:PRACh:MULTi:NUMBer?
Start Sub-Channel
Range: 0 to 11
Default: 0
Sets the sub-channel number for starting of the PRACH signal.
If the parameter set by the following command is changed while the signal is active, the :ULINk:APPLy command or Apply Needed () button must be executed for the change to occur.
[:SOURce]:RADio:WCDMa:TGPP[:BBG]:ULINk:PRACh:SUBChannel <val>
[:SOURce]:RADio:WCDMa:TGPP[:BBG]:ULINk:PRACh:SUBChannel?
3. Trigger Settings
PRACH Start Trigger Source
Choices: Immediate|Trigger
Default: Immediate
Sets the trigger source of PRACH.
Immediate: This choice resets the waveform and immediately replays waveform from the start.
Trigger: This choice plays the waveform after receiving the PRACH start trigger.
If the parameter set by the following command is changed while the signal is active, the :ULINk:APPLy command or Apply Needed () button must be executed for the change to occur.
[:SOURce]:RADio:WCDMa:TGPP[:BBG]:ULINk:PRACh:TRIGger:SOURce IMMediate|TRIGger
[:SOURce]:RADio:WCDMa:TGPP[:BBG]:ULINk:PRACh:TRIGger:SOURce?
Related Topics
PRACH Structure
Preamble
RACH
