RACH
These settings control the uplink transport Random Access Channel (RACH).
1. General Settings |
2. Error Insertion Settings |
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RACH 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.
1. General Settings
Data
Choice: PN9 | FIX4 | Custom Pattern | User Data
Default: PN9
Sets the type of data to be inserted into RACH.
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[:TGRoup[1]]:RACH[1]:DATA PN9|FIX4|PATTern|"<filename>"
[:SOURce]:RADio:WCDMa:TGPP[:BBG]:ULINk[:TGRoup[1]]:RACH[1]:DATA?
If you select <"filename">, PATTern or FIX4, use the following commands to create the pattern:
[:SOURce]:RADio:WCDMa:TGPP[:BBG]:ULINk[:TGRoup[1]]:RACH[1]:DATA:FIX4 <val>
[:SOURce]:RADio:WCDMa:TGPP[:BBG]:ULINk[:TGRoup[1]]:RACH[1]:DATA:FIX4
[:SOURce]:RADio:WCDMa:TGPP[:BBG]:ULINk[:TGRoup[1]]:RACH[1]:DATA:PATTern <val>
[:SOURce]:RADio:WCDMa:TGPP[:BBG]:ULINk[:TGRoup[1]]:RACH[1]:DATA:PATTern
Block Size
Range: 0 to 5000
Default: 168
Sets the transport block size for RACH.
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[:TGRoup[1]]:RACH[1]:BLKSize <val>
[:SOURce]:RADio:WCDMa:TGPP[:BBG]:ULINk[:TGRoup[1]]:RACH[1]:BLKSize?
Number of Blocks
Range: 0 to 4095
Default: 1
Sets the number of transport blocks coded into RACH.
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[:TGRoup[1]]:RACH[1]:NBLock <val>
[:SOURce]:RADio:WCDMa:TGPP[:BBG]:ULINk[:TGRoup[1]]:RACH[1]:NBLock?
Coding Type
Indicates the type of channel coding for RACH.
[:SOURce]:RADio:WCDMa:TGPP[:BBG]:ULINk[:TGRoup[1]]:RACH[1]:CODE?
TTI
Choice: 10 | 20 (ms)
Default: 20 ms
Sets the transmission time interval (TTI) for RACH.
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.
For the following commands, either can be used to set the RACH TTI.
[:SOURce]:RADio:WCDMa:TGPP[:BBG]:ULINk:PRACh:TTI 10000|20000
[:SOURce]:RADio:WCDMa:TGPP[:BBG]:ULINk:PRACh:TTI?
[:SOURce]:RADio:WCDMa:TGPP[:BBG]:ULINk[:TGRoup[1]]:RACH[1]:TTI 10000|20000
[:SOURce]:RADio:WCDMa:TGPP[:BBG]:ULINk[:TGRoup[1]]:RACH[1]:TTI?
Rate Matching Attribute
Indicates the rate match parameters of RACH.
[:SOURce]:RADio:WCDMa:TGPP[:BBG]:ULINk[:TGRoup[1]]:RACH[1]:RMATch?
CRC Length
Choice: 0 | 8 | 12 | 16 | 24
Default: 16
Sets the number of cyclic redundancy code (CRC) bits that are to be added to each transport channel block.
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[:TGRoup[1]]:RACH[1]:CRC 0|8|12|16|24
[:SOURce]:RADio:WCDMa:TGPP[:BBG]:ULINk[:TGRoup[1]]:RACH[1]:CRC?
Bits Per Frame
Indicates the bits per frame for RACH.
[:SOURce]:RADio:WCDMa:TGPP[:BBG]:ULINk[:TGRoup[1]]:RACH[1]:BPFRame?
Puncture Rate
Indicates the puncture rate removed from or added to the fully coded channel of RACH.
[:SOURce]:RADio:WCDMa:TGPP[:BBG]:ULINk[:TGRoup[1]]:RACH[1]:PPERcentage?
Maximum Puncture Rate
Indicates the allowed maximum puncture rate.
Bit Rate
Indicates the bit rate for RACH.
[:SOURce]:RADio:WCDMa:TGPP[:BBG]:ULINk[:TGRoup[1]]:RACH[1]:BRATe?
2. Error Insertion Settings
Error Insertion Mode
Choice: None | BER | BLER
Default: None
Sets the error insertion mode. The error insertion is available when the PRACH generation mode is set to "Single".
BLER |
This choice selects block error rate (BLER) mode. |
BER |
This choice selects a bit error rate (BER) mode. |
None |
This choice selects no BLER or BER mode (no error blocks or bits inserted). |
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[:TGRoup[1]]:RACH[1]:DATA:EINSert BLER|BER|NONE
[:SOURce]:RADio:WCDMa:TGPP[:BBG]:ULINk[:TGRoup[1]]:RACH[1]:DATA:EINSert?
BLER
Range: 0 to 1 (Resolution 0.0001)
Default: 0
Sets the inserted block error rate value.
[:SOURce]:RADio:WCDMa:TGPP[:BBG]:ULINk[:TGRoup[1]]:RACH[1]:DATA:BLER[:VALue] <val>
[:SOURce]:RADio:WCDMa:TGPP[:BBG]:ULINk[:TGRoup[1]]:RACH[1]:DATA:BLER[:VALue]?
BLER Error Blocks
Indicates the actual block errors inserted in the total number of blocks.
[:SOURce]:RADio:WCDMa:TGPP[:BBG]:ULINk[:TGRoup[1]]:RACH[1]:DATA:BLER:ERRor:BLOCk?
BLER Total Blocks
Indicates the total blocks inserted for the block error ratio calculation.
[:SOURce]:RADio:WCDMa:TGPP[:BBG]:ULINk[:TGRoup[1]]:RACH[1]:DATA:BLER:TOTal:BLOCk?
BER
Range: 0 to 1 (Resolution 0.0001)
Default: 0
Sets the bit error rate (BER) value for RACH.
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[:TGRoup[1]]:RACH[1]:DATA:BER[:VALue] <val>
[:SOURce]:RADio:WCDMa:TGPP[:BBG]:ULINk[:TGRoup[1]]:RACH[1]:DATA:BER[:VALue]?
BER Error Bits
Default: 0
Indicates the actual error bits inserted for the total number of bits.
[:SOURce]:RADio:WCDMa:TGPP[:BBG]:ULINk[:TGRoup[1]]:RACH[1]:DATA:BER:ERRor:BIT?
BER Total Bits
Default: 0
Indicates the total number of bits inserted for the bit error rate (BER) calculation.
[:SOURce]:RADio:WCDMa:TGPP[:BBG]:ULINk[:TGRoup[1]]:RACH[1]:DATA:BER:TOTal:BIT?