Rohde & Schwarz R&S CMW-KM300, Руководство пользователя, Страница: 351 / 388

NB-IoT NPRACH Measurement
R&S
®
CMW-KM300/-KS300
351 User Manual 1178.5689.02 ─ 06
● Key Features .........................................................................................................351
● Specifying General and Common Measurement Settings .................................... 351
● Specifying Required NPRACH Settings ................................................................352
● Specifying Measurement-Specific Settings ...........................................................352
● Configuring the Trigger System ............................................................................ 352
● Specifying Limits ................................................................................................... 352
● Performing Single-Shot Measurements ................................................................ 353
● Single-Shot and Continuous Measurements .........................................................354
4.4.1 Key Features
The NB-IoT NPRACH measurement is programmed as follows:
●
The measurement is controlled by SCPI commands with the following syn-
tax:
...NIOT:MEAS:PRACh...
●
Use general commands of the type
...:NIOT:MEAS...
(no
:PRACh
mnemonic)
to define the signal routing and perform RF and analyzer settings.
●
After a
*RST
, the measurement is switched off. Use
READ:NIOT:MEAS:PRACh...?
to initiate a single-shot measurement and retrieve
the results. You can also start the measurement using
INIT:NIOT:MEAS:PRACh
and retrieve the results using
FETCh:NIOT:MEAS:PRACh...?
.
●
For synchronization and proper decoding, some UE signal settings must be in
accordance with the measured signal; see
Chapter 4.4.3, "Specifying Required
NPRACH Settings" , on page 352.
4.4.2 Specifying General and Common Measurement Settings
// *****************************************************************************
// Initial system-reset
// *****************************************************************************
*RST; *OPC?
*CLS; *OPC?
// *****************************************************************************
// Define signal routing and perform RF and analyzer settings:
// Center frequency 1850 MHz, frequency offset 1 kHz, peak power -2 dBm,
// no user margin and 1 dB mixer level offset.
// *****************************************************************************
ROUTe:NIOT:MEAS:SCENario:SALone RF1C, RX1
CONFigure:NIOT:MEAS:RFSettings:EATTenuation 2
CONFigure:NIOT:MEAS:BAND OB2
CONFigure:NIOT:MEAS:RFSettings:FREQuency 1850E+6
CONFigure:NIOT:MEAS:RFSettings:FOFFset 1000
CONFigure:NIOT:MEAS:RFSettings:ENPower -2
CONFigure:NIOT:MEAS:RFSettings:UMARgin 0
CONFigure:NIOT:MEAS:RFSettings:MLOFfset 1
Programming
深圳德标仪器
135-1095-0799