1MA078_ 1e_WCDMA BS Performance Tests

1MA078_ 1e_WCDMA BS Performance Tests
WCDMA Base Station Performance
Tests according to TS25.141
Application Note
Products:
ı
R&S SMW200A
ı
R&S SMU200A
ı
R&S AMU200A
ı
R&S SMATE200A
®
®
®
®
3GPP TS25.141 defines conformance tests for
UTRA base stations (NodeB).
This application note describes how
performance tests (TS25.141 Chapter 8) can be
performed quickly and easily by using vector
signal generators from Rohde & Schwarz.
Examples illustrate the manual operation. A free
software program enables and demonstrates
remote operation.
The WCDMA base station transmitter (Tx) tests
(TS25.141 Chapter 6) are described in Application
Note 1MA67.
Schulz
5.2015 – 1MA78_0e
Application Note
The WCDMA base station receiver (Rx) tests
(TS25.141 Chapter 7) are described in Application
Note 1MA114.
Table of Contents
Table of Contents
1Introduction 4
2General Performance Tests....................................................................................... 6
2.1
Note
6
2.2Performance Test setup ........................................................................................................................6
2.3Instruments and Software options ......................................................................................................7
3Performance Tests (Chapter 8) ................................................................................. 8
3.1Basic operation ......................................................................................................................................8
3.1.1General 3GPP FDD settings (Test Case Wizard) ................................................................................9
3.1.2General Fading settings .....................................................................................................................11
3.1.3General AWGN settings .....................................................................................................................14
3.1.4Demo Program R&S TSrun ................................................................................................................16
3.2Demodulation of DCH .........................................................................................................................20
3.2.1Demodulation of DCH in static propagation conditions (Clause 8.2.1) ..............................................21
3.2.2Demodulation of DCH in multipath fading conditions (Clause 8.3) ....................................................24
3.2.3Demodulation of DCH in moving propagation conditions (Clause 8.4) ..............................................29
3.2.4Demodulation of DCH in birth/death propagation conditions (Clause 8.5).........................................32
3.3Verification of the internal BLER calculation (Clause 8.6) ..............................................................35
3.4RACH performance (Clause 8.8) ........................................................................................................38
3.4.1RACH preamble detection in static propagation conditions (Clause 8.8.1) .......................................39
3.4.2RACH preamble detection in multipath fading case 3 (Clause 8.8.2) ................................................42
3.4.3Demodulation of RACH message in static propagation conditions (Clause 8.8.3) ............................46
3.4.4Demodulation of RACH message in multipath fading case 3 (Clause 8.8.4) .....................................49
4
Appendix 53
4.1R&S TSrun Program ............................................................................................................................53
4.2 References
58
4.3Additional Information ........................................................................................................................58
4.4Ordering Information ...........................................................................................................................59
1MA78_0e
Rohde & Schwarz WCDMA Base Station Performance Tests according to TS25.141
2
Table of Contents
The following abbreviations are used in this Application Note for Rohde & Schwarz test
equipment:
1MA78_0e
ı
The R&S®SMW200A vector signal generator is referred to as the SMW.
ı
The R&S®SMATE200A vector signal generator is referred to as the SMATE.
ı
The R&S®SMU200A vector signal generator is referred to as the SMU.
ı
The R&S®AMU200A baseband signal generator and fading simulator is referred
to as the AMU.
ı
The SMATE, SMU and SMW are referred to as the SMx.
ı
The software R&S®TSrun is referred to as the TSrun.
Rohde & Schwarz WCDMA Base Station Performance Tests according to TS25.141
3
Introduction
1 Introduction
The Wide band code division multiple access (W-CDMA) was first introduced in 3GPP
Release 99/4 considering the growing demand for higher capacity and improved data
rate. Since then, it has gone through a long process of evolution to ensure high quality
experience for customers and maintain market competition.
Table 1-1 gives a brief overview of the evolution of W-CDMA with 3GPP releases.
Evolution of W-CDMA
3GPP Release
Main Features
Rel-99/4
W-CDMA
Rel-5
HSDPA
Rel-6
HSUPA
Rel-7
ı
Downlink MIMO
ı
16 QAM for Uplink and 64 QAM for Downlink
ı
Combination of MIMO and 64 QAM
ı
Dual cell HSDPA
ı
Dual cell HSUPA
ı
Dual band HSDPA
ı
Dual Cell HSDPA + MIMO
Rel-8
Rel-9
Rel-10
Four carrier HSDPA
Table 1-1: Evolution of W-CDMA from 3GPP release 99/4 to release 10
3GPP specification TS 25.141 describes the conformance tests for W-CDMA base
stations operating in FDD mode. It includes transmitter (Tx), receiver (Rx) and
performance (Px) tests.
The transmitter (Tx) tests (TS25.141 Chapter 6) are described in Application Note
1MA67 and the receiver (Rx) tests (TS25.141 Chapter 7) are covered in Application
Note 1MA114.
In this application note the WCDMA Test Case Wizard is used. Please not that this
Wizard supports the testcases according to release R99/R4 only.
Table 1-2 gives an overview of the performance tests defined in line with Chapter 8 of
TS25.141. The tests can be carried out using instruments from Rohde & Schwarz.
These tests are individually described in this application note.
1MA78_0e
Rohde & Schwarz WCDMA Base Station Performance Tests according to TS25.141
4
Introduction
Performance Requirement (Chapter 8) Release R99/R4
Chapter
Test
(TS25.141)
8.2.1 Demodulation of DCH in static propagation conditions
8.2.1
Demodulation of DCH
8.3 Demodulation of DCH in multipath fading conditions
8.3.1
Multipath fading Case 1
8.3.2
Multipath fading Case 2
8.3.3
Multipath fading Case 3
8.3.4
Multipath fading Case 4
8.4 Demodulation of DCH in moving propagation conditions
8.5 Demodulation of DCH in birth/death propagation conditions
8.6 Verification of the internal BLER calculation
8.8 RACH performance
8.8.1
RACH preamble detection in static propagation conditions
8.8.2
RACH preamble detection in multipath fading case 3
8.8.3
Demodulation of RACH message in static propagation conditions
8.8.4
Demodulation of RACH message in multipath fading case 3
Table 1-2: Covered Tests according to Release R99/R4
1MA78_0e
Rohde & Schwarz WCDMA Base Station Performance Tests according to TS25.141
5
General Performance Tests
2 General Performance Tests
2.1 Note
Very high power occurs on base stations! Be sure to use suitable attenuators in order
to prevent damage to the test equipment.
2.2 Performance Test setup
Fig. 2-1 shows the general test setup for performance tests. A SMx is used to perform
the test. The second RF path is used for diversity tests.
Fig. 2-1: Px Test Setup
1MA78_0e
Rohde & Schwarz WCDMA Base Station Performance Tests according to TS25.141
6
General Performance Tests
2.3 Instruments and Software options
Several different vector signal generators can be used for the tests described here:
ı
SMW
ı
SMU
ı
SMATE + AMU
The W-CDMA 3GPP FDD software option is available for each of the listed generators.
The following are needed for the Px tests:
ı
SMx-K42
3GPP FDD
The instrument needs the following general options:
ı
SMx-B14
Fading
ı
SMx-K62
AWGN
For diversity tests the SMx need a second RF path.
1MA78_0e
Rohde & Schwarz WCDMA Base Station Performance Tests according to TS25.141
7
Performance Tests (Chapter 8)
3 Performance Tests (Chapter 8)
Performance tests are for the receiver of the basestation. The basestation typically
measures the bit error rate (BER) or the block error rate (BLER on the DCH) or the
ability to detect certain signals (RACH preamble) under static or multipath channel
conditions.
Reference Measurement Channels (RMC)
For the performance tests RMC are defined. They contain W-CDMA channel
parameters as bit rate, spreading factor etc. They are named according to [1], annex A
and split in different subsets:
ı
RMC 12.2
ı
RMC 64
ı
RMC 144
ı
RMC 384
For more details refer to [1], annex A.
All RMCs are implemented as predefined settings in the signal generator family SMx.
Channels
According to [1] the channels to be tested are at the bottom (B), in the middle (M) and
at the top (T) of the supported frequency range of the base station.
3.1 Basic operation
For most of the following measurements the first operating steps are the same. They
are described only once.
The SMx simulates a UE and the channel with fading and noise (if applicable). Before
starting with the described steps perform a preset of the device (green button in left
upper corner). In principle four main parts are necessary:
ı
Signal routing
ı
W-CDMA settings for a UE in the baseband block
ı
Channel simulation / Fading
ı
AWGN / SNR
The SMx provides a Test Case Wizard which simplifies necessary settings according
to TS25.141. All necessary settings (the four mentioned steps) are handled
automatically according to the standard. In addition manual edition of certain
parameters is possible.
1MA78_0e
Rohde & Schwarz WCDMA Base Station Performance Tests according to TS25.141
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Performance Tests (Chapter 8)
3.1.1 General 3GPP FDD settings (Test Case Wizard)
1.
In the block diagram click the Baseband block (typically A). Select 3GPP FDD…
Fig. 3-1: Selecting of WCDMA (3GPP FDD) in the baseband
The 3GPP FFD A dialog opens (Fig. 3-2)
Fig. 3-2: 3GPP FDD main dialog. Use the Test Case Wizard-
1MA78_0e
Rohde & Schwarz WCDMA Base Station Performance Tests according to TS25.141
9
Performance Tests (Chapter 8)
2.
Press Test Case Wizard.
Fig. 3-3: The Test Case Wizard according to TS25.141: Available cases are shown under 8
Performance Requirement.
3.
In the tab Base Station, set the scrambling code and mode and select the
Power Class.
4.
Press Apply.
5.
Switch ON the RF paths.
Trigger
In default mode the SMx starts the WCDMA signal immediately.
6.
1MA78_0e
To align the start of the LTE signal to the basestation under test, set Trigger In
Mode to Armed Auto. (Fig. 3-4)
Rohde & Schwarz WCDMA Base Station Performance Tests according to TS25.141
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Performance Tests (Chapter 8)
Fig. 3-4: Trigger In settings. The SMx waits for an external trigger signal to align the WCDMA signal.
3.1.2 General Fading settings
The SMx provides channels simulators in the baseband via the block Fading. It allows
the fast and easy configuration with predefined settings according to the different
mobile radio specifications (e.g. in WCDMA 3G CASE 3). Additionally individual fading
settings can be applied.
The Test Case Wizard applies the correct fading settings automatically. To change
settings:
1.
1MA78_0e
Click on the block Fading and Fading Settings (Fig. 3-5)
Rohde & Schwarz WCDMA Base Station Performance Tests according to TS25.141
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Performance Tests (Chapter 8)
Fig. 3-5: Fading Settings
2.
Select a profile via Standard (e.g. 3GPP Case 3 (UE/BS)) (Fig. 3-6 and Fig. 3-7)
3.
Switch the fading block On. (Fig. 3-6)
Fig. 3-6: Overview General Fading settings. Select a predefined setting in Standard
1MA78_0e
Rohde & Schwarz WCDMA Base Station Performance Tests according to TS25.141
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Performance Tests (Chapter 8)
Fig. 3-7: Predefined Fading profiles for 3GPP
1MA78_0e
4.
Repeat the settings in other paths. If special MIMO modes are used, this is done
automatically
5.
The path settings are shown as a table and as graph. Individual settings can be
handled in the tables. (Fig. 3-8 and Fig. 3-9)
Rohde & Schwarz WCDMA Base Station Performance Tests according to TS25.141
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Performance Tests (Chapter 8)
Fig. 3-8: Fading Path table
Fig. 3-9: Fading Path graph
3.1.3 General AWGN settings
The SMx provides noise via the block AWGN. The power levels in [1] are always set
via a noise power and a relative signal-to-noise (SNR) requirement.
1MA78_0e
Rohde & Schwarz WCDMA Base Station Performance Tests according to TS25.141
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Performance Tests (Chapter 8)
The Test Case Wizard applies the correct AWGN settings automatically. To change
settings:
1.
Click on the block AWGN
2.
Switch the state ON and set the Mode to Additive Noise.(Fig. 3-10, Fig. 3-11)
3.
Set the System Bandwidth to 3.840 MHz (Fig. 3-10).
4.
Set the Ratio to 2 (Fig. 3-10).
Fig. 3-10: General AWGN settings. The system bandwidth is 3.840 MHz.
1MA78_0e
5.
Set the Reference Mode to Noise.
6.
Set the Noise Power and the Carrier to Noise Ratio (SNR) (e.g. power = -80.5
dB, SNR = - 4 dB) (Fig. 3-11). Please note that for certain testcases an additional
SNR correction factor applies.
7.
For the SMU each AWGN block has to be set separately.
8.
For the SMW the referenced RF port has to be set (e.g. RF A)
Rohde & Schwarz WCDMA Base Station Performance Tests according to TS25.141
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Performance Tests (Chapter 8)
Fig. 3-11: AWGN settings. Set the noise power and the SNR. The effective Carrier Power is shown.
3.1.4 Demo Program R&S TSrun
This Application Note comes with a demonstration program module called WCDMA BS
Performance Tests for the software R&S TSrun which is free of charge. The module
covers all required tests (with the exceptions in Table 1-2).
The WCDMA BS Performance Tests module represents a so called test for the TSrun
software. See Section 4.1 for some important points on the basic operation of TSrun.
Each test described in this application note can be executed quickly and easily using
the module. Additional individual settings can be applied.
The program offers a straightforward user interface, and SCPI remote command
sequence export functions for integrating the necessary SCPI commands into any
user-specific test environment. A measurement report will be generated on each run. It
can be saved to a file in different formats including PDF and HTML.
Following SCPI resources are needed:
ı
1MA78_0e
SMx
Rohde & Schwarz WCDMA Base Station Performance Tests according to TS25.141
16
Performance Tests (Chapter 8)
Getting started
This section describes only the module for the WCDMA BS Px tests. Double-click the
test to open the window for entering parameters.
The test consists of two independent testcases:
ı
The testcase ResetAll resets all instruments (SMx)
ı
The testcase Measurement is the main part.
Fig. 3-12: Full overview: setting parameters for the WCDMA BS Performance tests.
General settings
The basic parameters are set at the top right:
ı
Reset Devices: Sends a reset command to all connected instruments
ı
Ext. Ref: Uses an external reference
Fig. 3-13: General settings.
1MA78_0e
Rohde & Schwarz WCDMA Base Station Performance Tests according to TS25.141
17
Performance Tests (Chapter 8)
The Attenuation section is used to enter compensations for external path
attenuations.
Fig. 3-14: Attenuation settings.
Test cases
This is the main parameter. Select the wanted test case here. All other remaining
parameters in the window are grayed out or set active based on the requirements for
the selected test case. These parameters are described in detail in the individual
sections below.
Fig. 3-15: Available test cases.
Based on the selected test case, helpful hints are provided in the Comments section
and an illustration of the basic test setup is displayed.
Fig. 3-16: Brief notes are provided in the Comments section (top right) based on the selected test
case.
1MA78_0e
Rohde & Schwarz WCDMA Base Station Performance Tests according to TS25.141
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Performance Tests (Chapter 8)
Fig. 3-17: The Test Setup section (bottom right) displays a basic setup for the selected test case.
General settings for the signal
Use this section to define the basic parameters for the LTE signal:
ı
RF Frequency for the center frequency
ı
Power Level: the wanted level
ı
Trigger Mode: typically External trigger provided by the basestation under test
ı
Diversity: switches on the RX diversity
ı
The section Base Station defines the general BS settings:
▪
▪
▪
Power Class
Scrambling Mode
Scrambling Code
More advanced settings for specific tests cases are described in the corresponding
sections below.
Fig. 3-18: Main parameter settings.
1MA78_0e
Rohde & Schwarz WCDMA Base Station Performance Tests according to TS25.141
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Performance Tests (Chapter 8)
3.2 Demodulation of DCH
The Dedicated Channel (DCH) is a transport channel for dedicated user and control
data. For reproducible testing, so called Reference Measurement Channels (RMC) has
been defined in the specification.
The performance requirement for DCH is determined by the maximum Block Error
Ratio (BLER) allowed when the receiver input signal is at a specified E b/N0 limit. The
BLER is calculated for each of the measurement channels supported by the base
station [1].
If external BLER measurement is not used then the internal BLER calculation shall be
used instead. When internal BLER calculation is used, the requirements of the
verification test according to 8.6 shall be met in advance [1].
DCH tests and data rates
Reference
Measurement
Channel
8.2
8.3
8.4
8.5
12.2




64




144


-
-
-
-
data rate
(kbit/s)
384


Table 3-1: different data rates in DCH tests
The AWGN is for all DCH tests:
AWGN settings
Base Station
AWGN
(dBm)
Wide Area
- 84
Medium Range
- 74
Local Area / Home BS
- 70
Table 3-2: AWGN settings for DCH tests
The resulting RF level is calculated:
𝐿𝑒𝑣𝑒𝑙 = 𝐴𝑊𝐺𝑁 + 10 × 𝑙𝑜𝑔10
𝑅𝑀𝐶
𝐸𝑏
+
6
3.84 × 10
𝑁0
Example for a wide area BS with a RMC of 64 kbit/s and Eb/N0 of 5.5 dB:
Level = -84 dBm – 17.78 dB + 5.5 dB = -96.28 dBm.
1MA78_0e
Rohde & Schwarz WCDMA Base Station Performance Tests according to TS25.141
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Performance Tests (Chapter 8)
3.2.1 Demodulation of DCH in static propagation conditions (Clause
8.2.1)
In this test the BLER is determined in static propagation conditions (AWGN) at certain
Eb/N0.
The test shall verify the receiver's ability to receive the test signal under static
propagation conditions with a BLER not exceeding a specified limit [1].
Requirements for DCH in AWGN channel
Measurement
channel
(kbit/s)
Eb/N0
Eb/N0
BLER
With Rx Diversity
(dB)
Without Rx Diversity
(dB)
0.1
n.a.
n.a.
0.01
5.5
8.7
0.1
1.9
5.1
0.01
2.1
5.2
0.1
1.2
4.2
0.01
1.3
4.4
0.1
1.3
4.4
0.01
1.4
4.5
12.2
64
144
384
Table 3-3: Requirements for 8.2.1
Test Setup
Fig. 3-19 shows the test setup.
For diversity the wanted signal generated by SMx baseband A is split up in two paths.
AWGN is added.
The SMU needs an external trigger at input TRIGGER1, the SMW at USER3.
Fig. 3-19: Test setup for DCH test 8.2.1
1MA78_0e
Rohde & Schwarz WCDMA Base Station Performance Tests according to TS25.141
21
Performance Tests (Chapter 8)
Test Procedure
As an example the settings for diversity, wide area BS and a BLER of 0.01 are shown.
1MA78_0e
1.
For the basic steps see section 3.1.1.
2.
Select 8.2.1 Demodulation of DCH and switch Diversity ON. (both in tab
General)
3.
Select the Reference Measurement Channel and set the RF Frequency. In
addition the resulting Power Level is displayed. (example: RMC 12.2 kbps, 1.95
GHz)
4.
Set the required BLER (example 0.01). In addition the AWGN level (depends on
the Base station power class) and the Eb/No is displayed
Rohde & Schwarz WCDMA Base Station Performance Tests according to TS25.141
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Performance Tests (Chapter 8)
5.
Measure the BLER at the base station.
Demo Program
Fig. 3-20 shows the parameters of the test. Select the wanted Ref Measurement Ch.
and the Required BLER. When selecting a particular test all settings are default
according to the specification. The setting of the Eb/N0 depends on the RMC and the
required BLER and diversity. The level depends also on the base station power class.
For this test the fading is Off.
Fig. 3-20: Parameter for DCH test 8.2.1
1MA78_0e
Rohde & Schwarz WCDMA Base Station Performance Tests according to TS25.141
23
Performance Tests (Chapter 8)
Fig. 3-21 shows the report.
Fig. 3-21: Report 8.2.1
3.2.2 Demodulation of DCH in multipath fading conditions (Clause 8.3)
In this test the BLER is determined in multipath fading conditions and additional AWGN
at certain Eb/N0.
The test is split in four different tests with different fading conditions. Pleas also note
the applicability for the different BS power classes:
Test
Fading
BS class
8.3.1
Case 1
All
8.3.2
Case 2
Not Home BS
8.3.3
Case 3
Not Home BS
8.3.4
Case 4
Wide Area only
Table 3-4: Four tests with different fading conditions for 8.3
The tests shall verify the receiver's ability to receive the test signal
ı
under slow multipath fading propagation conditions (8.3.1)
ı
that has a large time dispersion (8.3.2)
ı
under fast fading propagation conditions (8.3.3 and 8.3.4)
with a BLER not exceeding a specified limit [1].
1MA78_0e
Rohde & Schwarz WCDMA Base Station Performance Tests according to TS25.141
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Performance Tests (Chapter 8)
The tables Table 3-5 to Table 3-8 show the different test requirements.
Requirements for DCH in multipath case 1 channel (8.3.1)
Measurement
channel
Eb/N0
Eb/N0
With Rx Diversity
Without Rx Diversity
(dB)
(dB)
0.1
n.a.
n.a.
0.01
12.5
19.7
0.1
6.8
12.2
0.01
9.8
16.5
0.1
6.0
11.4
0.01
9.0
15.6
0.1
6.4
11.8
0.01
9.4
16.1
BLER
(kbit/s)
12.2
64
144
384
Table 3-5: Requirements for 8.3.1
Requirements for DCH in multipath case 2 channel (8.3.2)
Measurement
channel
(kbit/s)
Eb/N0
Eb/N0
With Rx Diversity
Without Rx Diversity
(dB)
(dB)
0.1
n.a.
n.a.
0.01
9.6
15.6
0.1
4.9
9.8
0.01
7.0
12.9
0.1
4.3
8.8
0.01
6.2
12.1
0.1
4.7
9.3
0.01
6.7
12.7
BLER
12.2
64
144
384
Table 3-6: Requirements for 8.3.2
1MA78_0e
Rohde & Schwarz WCDMA Base Station Performance Tests according to TS25.141
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Performance Tests (Chapter 8)
Requirements for DCH in multipath case 3 channel (8.3.3)
Measurement
channel
(kbit/s)
12.2
64
144
384
Eb/N0
Eb/N0
With Rx Diversity
Without Rx Diversity
(dB)
(dB)
0.1
n.a.
n.a.
0.01
7.8
11.4
0.001
8.6
12.3
0.1
4.0
7.7
0.01
4.4
8.3
0.001
4.7
9.1
0.1
3.4
6.6
0.01
3.8
7.3
0.001
4.2
7.8
0.1
3.8
7.1
0.01
4.2
7.8
0.001
4.8
8.5
BLER
Table 3-7: Requirements for 8.3.3
Requirements for DCH in multipath case 4 channel (8.3.4)
Measurement
channel
Eb/N0
Eb/N0
With Rx Diversity
Without Rx Diversity
(dB)
(dB)
0.1
n.a.
n.a.
0.01
10.8
14.4
0.001
11.6
15.3
0.1
7.0
10.7
0.01
7.4
8.3
0.001
7.7
12.1
0.1
6.4
9.6
0.01
6.8
10.3
0.001
7.2
10.8
0.1
6.8
10.1
0.01
7.2
10.8
0.001
7.8
11.5
BLER
(kbit/s)
12.2
64
144
384
Table 3-8: Requirements for 8.3.4
Test Setup
Fig. 3-22 shows the test setup.
For diversity the wanted signal generated by SMx baseband A is split up in two paths.
The channel is simulated and AWGN is added.
1MA78_0e
Rohde & Schwarz WCDMA Base Station Performance Tests according to TS25.141
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Performance Tests (Chapter 8)
The SMU needs an external trigger at input TRIGGER1, the SMW at USER3.
Fig. 3-22: Test setup for DCH test 8.3
Test Procedure
As an example the settings for diversity, Medium Range BS , RMC 384 and a BLER of
0.001 for fading case 3 are shown.
1MA78_0e
1.
For the basic steps see section 3.1.1.
2.
Select 8.3.3 Demodulation of DCH and switch Diversity ON. (both in tab
General)
3.
Select the Reference Measurement Channel and set the RF Frequency. In
addition the resulting Power Level is displayed. (example: RMC 384 kbps, 1.95
GHz)
4.
Set the required BLER (example 0.001). In addition the AWGN level (depends on
the Base station power class) and the Eb/No is displayed. Note that Fading is
switched On.
Rohde & Schwarz WCDMA Base Station Performance Tests according to TS25.141
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Performance Tests (Chapter 8)
5.
Measure the BLER at the base station.
Demo Program
Fig. 3-23 shows the parameters of the test. Select the wanted Ref Measurement Ch.
and the Required BLER. When selecting a particular test all settings are default
according to the specification. The setting of the Eb/N0 depends on the RMC and the
required BLER and diversity. The level depends also on the base station power class.
For this test the fading is On, the settings depend on the testcase (case 1…4).
Fig. 3-23: Parameter for DCH test 8.3.1
1MA78_0e
Rohde & Schwarz WCDMA Base Station Performance Tests according to TS25.141
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Performance Tests (Chapter 8)
Fig. 3-24 shows the report.
Fig. 3-24: Report 8.3.1
3.2.3 Demodulation of DCH in moving propagation conditions (Clause
8.4)
In this test the BLER is determined in moving propagation conditions and additional
AWGN at certain Eb/N0.
The test shall verify the receiver's ability to receive and track the test signal with a
BLER not exceeding a specified limit [1].
Requirements for DCH in moving channel
Measurement
channel
(kbit/s)
Eb/N0
Eb/N0
With Rx Diversity
Without Rx Diversity
(dB)
(dB)
0.1
n.a.
n.a.
0.01
6.3
9.3
0.1
2.7
5.9
0.01
2.8
6.1
BLER
12.2
64
Table 3-9: Requirements for 8.4
Test Setup
Fig. 3-25 shows the test setup.
For diversity the wanted signal generated by SMx baseband A is split up in two paths.
AWGN is added.
1MA78_0e
Rohde & Schwarz WCDMA Base Station Performance Tests according to TS25.141
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Performance Tests (Chapter 8)
The SMU needs an external trigger at input TRIGGER1, the SMW at USER3.
Fig. 3-25: Test setup for DCH test 8.4
Test Procedure
As an example the settings for diversity, wide area BS, RMC 64 and a BLER of 0.01
are shown.
1MA78_0e
1.
For the basic steps see section 3.1.1.
2.
Select 8.4 Demodulation of DCH in Moving Propagation Conditions and
switch Diversity ON. (both in tab General)
3.
Select the Reference Measurement Channel and set the RF Frequency. In
addition the resulting Power Level is displayed. (example: RMC 64 kbps, 1.95
GHz)
4.
Set the required BLER (example 0.01). In addition the AWGN level (depends on
the Base station power class) and the Eb/No is displayed. Note that Fading is
switched On.
Rohde & Schwarz WCDMA Base Station Performance Tests according to TS25.141
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Performance Tests (Chapter 8)
5.
Measure the BLER at the base station.
Demo Program
Fig. 3-26 shows the parameters of the test. Select the wanted Ref Measurement Ch.
and the Required BLER. When selecting a particular test all settings are default
according to the specification. The setting of the Eb/N0 depends on the RMC and the
required BLER and diversity. The level depends also on the base station power class.
For this test the fading is On, the settings are moving propagation.
Fig. 3-26: Parameter for DCH test 8.4
1MA78_0e
Rohde & Schwarz WCDMA Base Station Performance Tests according to TS25.141
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Performance Tests (Chapter 8)
Fig. 3-27 shows the report.
Fig. 3-27: Report 8.4
3.2.4 Demodulation of DCH in birth/death propagation conditions
(Clause 8.5)
In this test the BLER is determined in birth/death propagation conditions and additional
AWGN at certain Eb/N0.
The test shall verify the receiver's ability to receive the test signal to find new multi path
components with a BLER not exceeding a specified limit [1].
Requirements for DCH in birth/death channel
Measurement
channel
(kbit/s)
Eb/N0
Eb/N0
With Rx Diversity
Without Rx Diversity
(dB)
(dB)
0.1
n.a.
n.a.
0.01
8.3
11.4
0.1
4.7
8.0
0.01
4.8
8.1
BLER
12.2
64
Table 3-10: Requirements for 8.5
Test Setup
Fig. 3-28 shows the test setup.
For diversity the wanted signal generated by SMx baseband A is split up in two paths.
AWGN is added.
1MA78_0e
Rohde & Schwarz WCDMA Base Station Performance Tests according to TS25.141
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Performance Tests (Chapter 8)
The SMU needs an external trigger at input TRIGGER1, the SMW at USER3.
Fig. 3-28: Test setup for DCH test 8.5
Test Procedure
As an example the settings for diversity, wide area BS, RMC 64 and a BLER of 0.01
are shown.
1MA78_0e
1.
For the basic steps see section 3.1.1.
2.
Select 8.5 Demodulation of DCH in Birth/Death Propagation Conditions and
switch Diversity ON. (both in tab General)
3.
Select the Reference Measurement Channel and set the RF Frequency. In
addition the resulting Power Level is displayed. (example: RMC 64 kbps, 1.95
GHz)
4.
Set the required BLER (example 0.01). In addition the AWGN level (depends on
the Base station power class) and the Eb/No is displayed. Note that Fading is
switched On.
Rohde & Schwarz WCDMA Base Station Performance Tests according to TS25.141
33
Performance Tests (Chapter 8)
5.
Measure the BLER at the base station.
Demo Program
Fig. 3-29 shows the parameters of the test. Select the wanted Ref Measurement Ch.
and the Required BLER. When selecting a particular test all settings are default
according to the specification. The setting of the Eb/N0 depends on the RMC and the
required BLER and diversity. The level depends also on the base station power class.
For this test the fading is On, the settings are birth/death propagation.
Fig. 3-29: Parameter for DCH test 8.5
1MA78_0e
Rohde & Schwarz WCDMA Base Station Performance Tests according to TS25.141
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Performance Tests (Chapter 8)
Fig. 3-30 shows the report.
Fig. 3-30: Report 8.5
3.3 Verification of the internal BLER calculation (Clause 8.6)
Base Station System with internal BLER calculates block error rate from the CRC
blocks of the received. This test is performed only if Base Station System has this kind
of feature. All data rates which are used in clause 8 Performance requirement testing
shall be used in verification testing. This test is performed by feeding measurement
signal with known BLER to the input of the receiver. Locations of the erroneous blocks
shall be randomly distributed within a frame. Erroneous blocks shall be inserted into
the UL signal as shown in figure Fig. 3-31 [1].
Information
data
CRC
attachment
CRC error
insertion
Radio frame
segmentation
Rate matching
TrBk concatenation/
Code block segment.
Channel
coding
Radio frame
equalisation
1st interleaving
TrCH
multiplexing
Physical
channel
segmentation
2nd interleaving
Physical
channel
mapping
PhCH
Fig. 3-31: BLER insertion into the information data [1]
The aim of this test is to verify that the internal BER calculation accuracy shall meet
requirements for conformance testing. BLER indicated by the base station system shall
be within ±10% of the BLER generated by the RF signal source for the measurement
signals specified in Table 3-11.
1MA78_0e
Rohde & Schwarz WCDMA Base Station Performance Tests according to TS25.141
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Performance Tests (Chapter 8)
Measurement signal requirements
Transport channel combination
Data rate
BER
DPCH
12.2 kbps
0.01
DPCH
64 kbps
0.01
DPCH
144 kbps
0.01
DPCH
384 kbps
0.01
Table 3-11: Measurement signals requirements for internal BER calculation
Signal source parameters should be set according Table 3-12
Uplink levels
Parameters
Uplink Level
(dBm/3.84 MHz)
UL signal
level
BS Class
12.2
64
144
484
Wide Area BS
- 111
- 107
- 104
- 100
Medium Range BS
- 101
- 97
- 94
- 90
Local Area BS /
Home BS
- 97
- 93
- 90
- 86
Data
sequence
Table 3-12: Parameters for signal source
PN9 or longer
Test Setup
Fig. 3-32: Verification of the internal LBER calculation test setup (8.6). The SMx generates the WCDMA uplink reference measurement channel.
As an example the settings for diversity, wide area BS, RMC 64 and a BLER of 0.01
are shown.
1MA78_0e
1.
For the basic steps see section 3.1.1.
2.
Select 8.6 Verification of internal BLER and switch Diversity ON. (both in tab
General)
Rohde & Schwarz WCDMA Base Station Performance Tests according to TS25.141
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Performance Tests (Chapter 8)
3.
Select the Reference Measurement Channel , the RF Frequency and the Block
Error Rate to 0.01. In addition the resulting Power Level is displayed. (example:
RMC 64 kbps, 1.95 GHz)
4.
Measure the BLER at the base station at least over 50000 blocks.
Demo Program
Fig. 3-33 shows the parameters of the test. Select the wanted Ref Measurement Ch.
and the Bock Error Rate. When selecting a particular test all settings are default
according to the specification. The level depends also on the base station power class.
1MA78_0e
Rohde & Schwarz WCDMA Base Station Performance Tests according to TS25.141
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Performance Tests (Chapter 8)
Fig. 3-33: Parameter for BLER verification test 8.6
Fig. 3-34 shows the report.
Fig. 3-34: Report 8.6
3.4 RACH performance (Clause 8.8)
The Random Access Channel (RACH) is used by the UE for initial access to the radio
interface. The UE transmits RACH with preambles until it receives a confirmation by
the network (via AICH). Then the UE sends a RACH with a message part. Both
receiving cases (preamble and message) are tested in the next sections.
1MA78_0e
Rohde & Schwarz WCDMA Base Station Performance Tests according to TS25.141
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Performance Tests (Chapter 8)
The AWGN is for all RACH tests:
AWGN settings
Base Station
AWGN
(dBm)
Wide Area
- 84
Medium Range
- 74
Local Area / Home BS
- 70
Table 3-13: AWGN settings for RACH tests
The test is split in four different tests with different fading conditions. Please also note
the applicability for the different BS power classes:
Test
Purpose
8.8.1
Channel
BS class
AWGN
All
AWGN + Case 3
Not Home BS
AWGN
All
AWGN + Case 4
Not Home BS
Preamble
8.8.2
8.8.3
Message
8.8.4
Table 3-14: Four tests for RACH 8.8
Please note, that for RACH tests the power level is offset by 5.79 dB. That means the
shown level at the SMx is 5.79 dB lower than the wanted level in the wizard.
3.4.1 RACH preamble detection in static propagation conditions (Clause
8.8.1)
The test shall verify the receiver's ability to detect RACH preambles under static
propagation conditions [1].
The performance requirement is determined by the two parameters probability of false
detection of the preamble (Pfa) and the probability of detection of preamble (Pd). Only
one signature is used and it is known by the receiver [1].
The preamble is repeated.
1MA78_0e
Rohde & Schwarz WCDMA Base Station Performance Tests according to TS25.141
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Performance Tests (Chapter 8)
Preamble
Preamble
Requirements for RACH in AWGN channel
Eb/N0
With Rx Diversity
Eb/N0
Without Rx Diversity
(dB)
(dB)
0.99
- 20.1
- 17.2
0.999
- 19.7
-16.4
Pfa
Pd
≤
≥
0.001
Table 3-15: Requirements for 8.8.1
Test Setup
Fig. 3-35 shows the test setup.
For diversity the wanted signal generated by SMx baseband A is split up in two paths.
AWGN is added.
The SMU needs an external trigger at input TRIGGER1, the SMW at USER3.
Fig. 3-35: Test setup for RACH test 8.8.1
Test Procedure
As an example the settings for diversity, wide area BS and a Pd of 0.999 are shown.
1MA78_0e
1.
For the basic steps see section 3.1.1.
2.
Select 8.8.1 RACH Preamble Detection in Static Propagation Conditions and
switch Diversity ON. (both in tab General)
Rohde & Schwarz WCDMA Base Station Performance Tests according to TS25.141
40
Performance Tests (Chapter 8)
3.
Set the RF Frequency. In addition the resulting Power Level is displayed.
(example: 1.95 GHz)
4.
Set the required Pd (example 0.999). In addition the AWGN level (depends on
the Base station power class) and the Ec/N0 is displayed
5.
Measure the probabilities at the base station.
Demo Program
Fig. 3-36 shows the parameters of the test. Select the wanted Required Pd. When
selecting a particular test all settings are default according to the specification. The
setting of the Ec/N0 depends on the required Pd and diversity. The level depends also
on the base station power class. For this test the fading is Off.
1MA78_0e
Rohde & Schwarz WCDMA Base Station Performance Tests according to TS25.141
41
Performance Tests (Chapter 8)
Fig. 3-36: Parameter for RACH test 8.8.1
Fig. 3-37 shows the report.
Fig. 3-37: Report 8.8.1
3.4.2 RACH preamble detection in multipath fading case 3 (Clause 8.8.2)
The test shall verify the receiver's ability to detect RACH preambles under multipath
fading case 3 propagation conditions [1].
1MA78_0e
Rohde & Schwarz WCDMA Base Station Performance Tests according to TS25.141
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Performance Tests (Chapter 8)
The performance requirement is determined by the two parameters probability of false
detection of the preamble (Pfa) and the probability of detection of preamble (Pd). Only
one signature is used and it is known by the receiver [1].
The requirement shall not be applied to Home BS.
The preamble is repeated.
Preamble
Preamble
Requirements for RACH in AWGN channel
Eb/N0
Eb/N0
≥
With Rx Diversity
(dB)
Without Rx Diversity
(dB)
0.99
- 14.9
- 8.8
0.999
- 12.8
- 5.8
Pfa
Pd
≤
0.001
Table 3-16: Requirements for 8.8.2
Test Setup
Fig. 3-38shows the test setup.
For diversity the wanted signal generated by SMx baseband A is split up in two paths.
The channel is simulated and AWGN is added.
The SMU needs an external trigger at input TRIGGER1, the SMW at USER3.
Fig. 3-38: Test setup for DCH test 8.8.2
Test Procedure
As an example the settings for diversity, wide area BS and a Pd of 0.999 are shown.
1.
1MA78_0e
For the basic steps see section 3.1.1.
Rohde & Schwarz WCDMA Base Station Performance Tests according to TS25.141
43
Performance Tests (Chapter 8)
2.
Select 8.8.2 RACH Preamble Detection in Multipath Fading Case 3
Conditions and switch Diversity ON. (both in tab General)
3.
Set the RF Frequency. In addition the resulting Power Level is displayed.
(example: 1.95 GHz)
4.
Set the required Pd (example 0.999). In addition the AWGN level (depends on
the Base station power class) and the Ec/N0 is displayed. Note that Fading is
switched On.
5.
Measure the probabilities at the base station.
Demo Program
Fig. 3-39 shows the parameters of the test. Select the wanted Required Pd. When
selecting a particular test all settings are default according to the specification. The
1MA78_0e
Rohde & Schwarz WCDMA Base Station Performance Tests according to TS25.141
44
Performance Tests (Chapter 8)
setting of the Ec/N0 depends on the required Pd and diversity. The level depends also
on the base station power class. For this test the fading is ON, the setting is multipath
case 3.
Fig. 3-39: Parameter for RACH test 8.8.2
Fig. 3-40 shows the report.
Fig. 3-40: Report 8.8.2
1MA78_0e
Rohde & Schwarz WCDMA Base Station Performance Tests according to TS25.141
45
Performance Tests (Chapter 8)
3.4.3 Demodulation of RACH message in static propagation conditions
(Clause 8.8.3)
The test shall verify the receiver's ability to receive the message part of the RAC under
static propagation conditions [1].
In this test the BLER of the RACH message is determined in multipath fading
conditions and additional AWGN at certain Eb/N0.
The receiver tries to detect the preamble and the message. The block error rate is
calculated for the messages that have been decoded. Messages following undetected
preambles shall not be taken into account in the BLER measurement [1].
The RACH pattern is repeated.
Preamble
Message
Preamble
Message
Requirements for RACH in AWGN channel, TTI = 20 ms
TB size 360 bits
TB size 168 bits
Eb/N0
Eb/N0
Eb/N0
Eb/N0
With Rx
Diversity
(dB)
Without Rx
Diversity
(dB)
With Rx
Diversity
(dB)
Without Rx
Diversity
(dB)
0.1
4.5
7.6
4.3
7.3
0.01
5.4
8.5
5.2
8.2
BLER
Table 3-17: Requirements for 8.8.3
The resulting RF level is calculated:
𝐿𝑒𝑣𝑒𝑙 = 𝐴𝑊𝐺𝑁 + 10 × 𝑙𝑜𝑔10
𝑇𝐵
𝐸𝑏
+
6
𝑇𝑇𝐼 × 3.84 × 10
𝑁0
Test Setup
Fig. 3-41 shows the test setup.
For diversity the wanted signal generated by SMx baseband A is split up in two paths.
AWGN is added.
The SMU needs an external trigger at input TRIGGER1, the SMW at USER3.
1MA78_0e
Rohde & Schwarz WCDMA Base Station Performance Tests according to TS25.141
46
Performance Tests (Chapter 8)
Fig. 3-41: Test setup for RACH test 8.8.3
Test Procedure
As an example the settings for diversity, wide area BS, TB of 183 bits and a BLER of
0.01 are shown.
1MA78_0e
1.
For the basic steps see section 3.1.1.
2.
Select 8.8.3 Demodulation of RACH Message in Static Propagation
Conditions and switch Diversity ON. (both in tab General)
3.
Select the Transport Block Size, the RF Frequency. In addition the resulting
Power Level is displayed. (example: 168 bits, 1.95 GHz)
4.
Set the required BLER (example 0.01). In addition the AWGN level (depends on
the Base station power class) and the Eb/No is displayed.
Rohde & Schwarz WCDMA Base Station Performance Tests according to TS25.141
47
Performance Tests (Chapter 8)
5.
Measure the BLER at the base station.
Demo Program
Fig. 3-42 shows the parameters of the test. Select the wanted Transport Block Size
and the Required BLER. When selecting a particular test all settings are default
according to the specification. The setting of the Eb/N0 depends on the Transport
Block size, required BLER and diversity. The level depends also on the base station
power class. For this test the fading is Off.
Fig. 3-42: Parameter for RACH test 8.8.3
1MA78_0e
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Performance Tests (Chapter 8)
Fig. 3-43 shows the report.
Fig. 3-43: Report 8.8.3
3.4.4 Demodulation of RACH message in multipath fading case 3 (Clause
8.8.4)
The test shall verify the receiver’s ability to receive the test signal under multipath
fading case 3 propagation conditions with a BLER not exceeding a specified limit [1].
In this test the BLER of the RACH message is determined in multipath fading
conditions and additional AWGN at certain Eb/N0.
The receiver tries to detect the preamble and the message. The block error rate is
calculated for the messages that have been decoded. Messages following undetected
preambles shall not be taken into account in the BLER measurement [1].
Only one signature is used and it is known by the receiver [1].
The requirement shall not be applied to Home BS.
The preamble is repeated.
Preamble
1MA78_0e
Message
Preamble
Message
Rohde & Schwarz WCDMA Base Station Performance Tests according to TS25.141
49
Performance Tests (Chapter 8)
Requirements for RACH in fading case 3 channel, TTI = 20 ms
TB size 360 bits
TB size 168 bits
BLER
Eb/N0
With Rx
Diversity
Eb/N0
Without Rx
Diversity
Eb/N0
With Rx
Diversity
Eb/N0
Without Rx
Diversity
(dB)
(dB)
(dB)
(dB)
11.6
12.7
0.1
8.0
11.7
7.9
0.01
9.1
13.0
8.9
Table 3-18: Requirements for 8.8.4
The resulting RF level is calculated:
𝐿𝑒𝑣𝑒𝑙 = 𝐴𝑊𝐺𝑁 + 10 × 𝑙𝑜𝑔10
𝑇𝐵
𝐸𝑏
+
𝑇𝑇𝐼 × 3.84 × 106 𝑁0
Test Setup
Fig. 3-44 shows the test setup.
For diversity the wanted signal generated by SMx baseband A is split up in two paths.
The channel is simulated and AWGN is added.
The SMU needs an external trigger at input TRIGGER1, the SMW at USER3.
Fig. 3-44: Test setup for DCH test 8.8.4
Test Procedure
As an example the settings for diversity, wide area BS, a TB of 183 bits and a BLER of
0.01 are shown.
1.
1MA78_0e
For the basic steps see section 3.1.1.
Rohde & Schwarz WCDMA Base Station Performance Tests according to TS25.141
50
Performance Tests (Chapter 8)
1MA78_0e
2.
Select 8.8.4 Demodulation of RACH Message in Multipath Fading Case 3 and
switch Diversity ON. (both in tab General)
3.
Select the Transport Block Size, the RF Frequency. In addition the resulting
Power Level is displayed. (example: 168 bits, 1.95 GHz)
4.
Set the required BLER (example 0.01). In addition the AWGN level (depends on
the Base station power class) and the Eb/No is displayed. Note that Fading is
switched On.
5.
Measure the BLER at the base station.
Rohde & Schwarz WCDMA Base Station Performance Tests according to TS25.141
51
Performance Tests (Chapter 8)
Demo Program
Fig. 3-45 shows the parameters of the test. Select the wanted Transport Block Size
and the Required BLER. When selecting a particular test all settings are default
according to the specification. The setting of the Eb/N0 depends on the Transport
Block size, required BLER and diversity. The level depends also on the base station
power class. For this test the fading is ON, the setting is multipath case 3.
Fig. 3-45: Parameter for RACH test 8.8.4
Fig. 3-46 shows the report.
Fig. 3-46: Report 8.8.4
1MA78_0e
Rohde & Schwarz WCDMA Base Station Performance Tests according to TS25.141
52
Appendix
4 Appendix
4.1 R&S TSrun Program
The TSrun software application makes it possible to combine tests (modules) provided
by Rohde & Schwarz into test plans to allow rapid and easy remote control of test
instruments. This program is available free of charge from our website.
Requirements
Operating system:
ı
Microsoft Windows XP / Vista / Windows 7 / Windows 8
ı
NET framework V4.0 or higher
General PC requirements:
ı
Pentium 1 GHz or faster
ı
1 Gbyte RAM
ı
100 Mbyte space harddisk
ı
XGA monitor (1024x768)
Remote control interface:
ı
National Instruments VISA
ı
GPIB card
Or
ı
1MA78_0e
LAN connection. AfterTSrun is launched, the following splash screen appears:
Rohde & Schwarz WCDMA Base Station Performance Tests according to TS25.141
53
Appendix
Fig. 4-1: Overview TSrun
Tests and test plans
Tests are separate, closed modules for TSrun. A test plan can consist of one or more
tests.
1MA78_0e
Rohde & Schwarz WCDMA Base Station Performance Tests according to TS25.141
54
Appendix
Fig. 4-2: Overview of a test plan in TSrun. The test plan in the example contains only one test
(WCDMA BS Tx Test). After the test is completed, the bar along the bottom can be used to display
the measurement and SCPI reports.
The WCDMA BS tests can be found under Tests/ApplicationNotes.
Click RUN to start the current test plan.
SCPI connections
Under Resources|SCPI Connections, you can add all required instruments for
remote control.
1MA78_0e
Rohde & Schwarz WCDMA Base Station Performance Tests according to TS25.141
55
Appendix
Fig. 4-3: Setting the SCPI connections.
Use Configure… to open a wizard for entering the VISA parameters (Fig. 4-4). Use
the Test Connection button to test the connection to the instrument. When the
Demo Mode button is enabled, no instruments need to be connected because TSrun
runs in demo mode and output a fictitious test report.
Fig. 4-4: SCPI connections.
1MA78_0e
Rohde & Schwarz WCDMA Base Station Performance Tests according to TS25.141
56
Appendix
Fig. 4-5: Wizard for entering VISA parameters. Both the IP address and a host name can be entered
directly.
Reports: Measurement and SCPI
After the test is completed, TSrun automatically generates both a Measurement
Report and a SCPI Report.
The measurement report shows the actual results and the selected settings.
The SCPI report returns a LOG file of all transmitted SCPI commands. These can then
be copied and easily used in separate applications.
1MA78_0e
Rohde & Schwarz WCDMA Base Station Performance Tests according to TS25.141
57
Appendix
Fig. 4-6: SCPI report.
4.2 References
1] Technical Specification Group Radio Access Network; Base station conformance
testing (FDD), Release 10; 3GPP TS 25.141, V 10.11.0, September 2014
[2] Rohde & Schwarz: W-CDMA Base Station Receiver Tests according to TS
25.141 Rel. 10, Application Note 1MA114, October 2014
[2] Rohde & Schwarz: W-CDMA Base Station Transmitter Tests according to TS
25.141 Rel. 10, Application Note 1MA67, October 2014
4.3 Additional Information
Please send your comments and suggestions regarding this white paper to
TM-Applications@rohde-schwarz.com
1MA78_0e
Rohde & Schwarz WCDMA Base Station Performance Tests according to TS25.141
58
Appendix
4.4 Ordering Information
Ordering Information for Signal Generators
Vector Signal Generator
1MA78_0e
Product Description
Type
Ordering No.
Vector Signal Generator
SMW200A
1412.0000.02
Baseband Generator
SMW-B10
1413.1200.02
Baseband Generator
SMW-B11
1159.8411.02
Baseband Main Module
SMW-B13
1141.8003.04
Fading Simulator
SMW-B14
1413.1500.02
1st RF path
SMW-B10x
2nd RF path
SMW-B20x
AWGN
SMW-K62
1413.3484.02
Digital Standard 3GPP FDD
SMW-K42
1413.3784.02
Rohde & Schwarz WCDMA Base Station Performance Tests according to TS25.141
59
About Rohde & Schwarz
Regional contact
Rohde & Schwarz is an independent group of
companies specializing in electronics. It is a leading
supplier of solutions in the fields of test and
measurement, broadcasting, radiomonitoring and
radiolocation, as well as secure communications.
Established more than 75 years ago, Rohde &
Schwarz has a global presence and a dedicated
service network in over 70 countries. Company
headquarters are in Munich, Germany.
Europe, Africa, Middle East
+49 89 4129 12345
customersupport@rohde-schwarz.com
North America
1-888-TEST-RSA (1-888-837-8772)
customer.support@rsa.rohde-schwarz.com
Latin America
+1-410-910-7988
customersupport.la@rohde-schwarz.com
Asia/Pacific
+65 65 13 04 88
customersupport.asia@rohde-schwarz.com
China
+86-800-810-8228 /+86-400-650-5896
customersupport.china@rohde-schwarz.com
Environmental commitment
ı
Energy-efficient products
ı
Continuous improvement in environmental
sustainability
ı
ISO 14001-certified environmental
management system
This application note and the supplied programs
may only be used subject to the conditions of use
set forth in the download area of the Rohde &
Schwarz website.
PAD-T-M: 3573.7380.02/02.00/CI/1/EN/
R&S® is a registered trademark of Rohde & Schwarz GmbH & Co.
KG; Trade names are trademarks of the owners.
Rohde & Schwarz GmbH & Co. KG
Mühldorfstraße 15 | D - 81671 München
Phone + 49 89 4129 - 0 | Fax + 49 89 4129 – 13777
www.rohde-schwarz.com
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