Rohde & Schwarz SMW-K144 - Page 122

5G New Radio Configuration and Settings
R&S
®
SMW-K144
122User Manual 1178.8013.02 ─ 06
4. Select "PRACH > Settings > Config".
This dialog comprises the settings of the physical random access channel
(PRACH).
According to TS 38.211, the 64 preambles (Preamble Index) defined in each time-
frequency PRACH occasion are numbered starting from the first cyclic shift of a
logical root sequence and then following the logical root sequence index, starting
with the index set by the parameter Logical Root Sequence.
Settings:
Format.........................................................................................................................122
Restricted Set..............................................................................................................122
Logical Root Sequence...............................................................................................122
Zero Correlation Zone.................................................................................................123
Preamble Index...........................................................................................................123
Format
Selects the PRACH format.
The available formats depend on the SC Spacing/CP as follows:
●
SCS = {1.25 kHz; 5 KHz}: "Format" = 0, 1, 2, 3
●
SCS = {15 kHz; 30 kHz; 60 kHz; 120 kHz }: "Format" = A1, A2, A3, B1, B2, B3, B4,
C0, C2
Remote command:
[:SOURce<hw>]:BB:NR5G:SCHed:CELL<ch0>:SUBF<st0>:USER<dir0>:
BWPart<gr0>:ALLoc<user0>:PRACh:FORMat on page 254
Restricted Set
Sets the higher-layer parameter restrictedSetConfig that defines the type of
restricted sets (unrestricted, restricted type A, restricted type B).
Supported restricted sets depend on the PRACH Format as follows:
●
"Format" = 0, 1, 2, 3: "Restricted Type A, Restricted Type B"
●
"Format" = A1, A2, A3, B1, B2, B3, B4, C0, C2: "Unrestricted"
Remote command:
[:SOURce<hw>]:BB:NR5G:SCHed:CELL<ch0>:SUBF<st0>:USER<dir0>:
BWPart<gr0>:ALLoc<user0>:PRACh:RSET on page 254
Logical Root Sequence
Sets the higher-layer parameter prach-RootSequenceIndex that defines the start-
ing logical root sequence index and thus the 64 PRACH preambles.
PRACH Settings