LTE PRACH Measurement
R&S
®
CMW-KM5xx/-KS5xx
765
User Manual 1173.9628.02 ─ 16
In the Standalone (SA) scenario, this parameter is controlled by the measurement. In
the Combined Signal Path (CSP) scenario, it is controlled by the signaling application.
For background information see
chapter 4.2.7, "LTE PRACH UL Signal Properties"
Remote command:
(SA)
(CSP)
(CSP)
Number of Preambles
Specifies the number of preambles to be captured per measurement interval and to be
presented in "multi preamble" result views, e.g. "EVM vs Preamble" and "Power vs
Preamble".
"Single Preamble" views evaluate only one preamble per measurement interval. To
achieve maximum measurement speed for these views, set this parameter to 1.
Remote command:
PRACH Frequency Offset
Enable "Auto" to detect the frequency offset automatically or disable "Auto" and specify
the frequency offset used by the UE. A manual configuration of the frequency offset
may speed up the measurement.
The frequency offset is required to calculate the location of the 6 preamble Resource
Blocks (RB) within the channel bandwidth. For FDD the number of the first RB equals
the offset, for TDD it is calculated from this parameter and the parameter frequency
resource index as described in 3GPP TS 36.211 section 5.7.1 "Time and frequency
structure".
In the Standalone (SA) scenario, this parameter is controlled by the measurement. In
the Combined Signal Path (CSP) scenario, it is controlled by the signaling application.
For background information see
chapter 4.2.7.1, "Preambles in the Frequency
Remote command:
(SA)
(CSP)
4.3.2.3
Modulation Settings
The following parameters configure the modulation settings of the LTE PRACH mea-
surement.
GUI Reference
深圳德标仪器
135-1095-0799