Products: FSIQ, SMIQ
Tests on 3G-Base Stations to TS 25.141
with FSIQ and SMIQ
This application note describes how to measure the various WCDMA signals which are used for transmitter tests on FDD base stations with an FSIQ signal analyzer, and how to generate the diverse stimulus signals needed for receiver and performance tests with an SMIQ signal generator.
The demo program 3GdemoBS is included. Run 3GDemoBS to set up the instruments and carry out the tests to TS 25.141 via remote control. The demo program is distributed as source code; adopt the remote control commands and test sequences for your own test routines, and integrate FSIQ and SMIQ into your
test systems with maximum ease.
Contents
1Overview (4)
2Installing of the demo program 3GDemoBS (5)
3Principles of Operation (6)
First steps with the demo program (6)
Advanced information about the demo program (8)
Uncertainty of the complete test system (9)
4 (9)
5 (9)
6Transmitter Tests (10)
Test set up for transmitter tests (11)
Transmitter tests step by step (12)
Base station maximum output power (6.2.1) (13)
CPICH power accuracy (6.2.2) (14)
Frequency error (6.3) (17)
Power control steps (6.4.2) (19)
Power control dynamic range (6.4.3) (21)
Total power dynamic range (6.4.4) (23)
Occupied bandwidth (6.5.1) (25)
Spectrum emission mask (6.5.2.1) (27)
Adjacent Channel Leakage Power Ratio (6.5.2.2) (29)
防砸鞋Spurious emissions (6.5.3) (31)
Spurious emissions Category A (6.5.3.4.1) (32)
Spurious emmisions Category B (6.5.3.4.2) (33)
Protection of the base station receiver (6.5.3.4.3) (33)
Co-existence with GSM 900 (6.5.3.4.4) (34)
Co-existence with DCS 1800 (6.5.3.4.5) (34)
Co-existence with PHS (6.5.3.4.6) (35)
Co-existence with services in adjacent bands (6.5.3.4.7) (35)
Co-existence with UTRA-TDD (6.5.3.4.8) (36)
Transmit intermodulation (6.6) (36)
Error Vector Magnitude (6.7.1) (37)
Peak Code Domain Error (6.7.2) (39)
7Receiver Tests (41)
Test Setup for Receiver tests (41)
Receiver Test Demonstration Step by Step (42)
Reference Sensitivity Level (7.2) (43)
Dynamic Range (7.3) (45)
Adjacent Channel Selectivity (7.4) (46)
Blocking Characteristics (7.5) (48)
Intermodulation Characteristics (7.6) (49)
Spurious Emissions (7.7) (51)
Verification of Internal BER Calculation (7.8) (53)
8PerformanceTests (53)
Test Setup for Performance Tests (54)
Performance Test Demonstration Step by Step (55)
Demodulation of DCH in Static Propagation Conditions (8.2) (55)
Demodulation of DCH in Multipath Fading Conditions (8.3) (57)
自封袋设备Demodulation of DCH in Moving Propagation Conditions (8.4) (60)
Demodulation of DCH in Birth / Death Conditions (8.5) (61)
Verification of Internal BLER Calculation (8.6) (62)
9Test Signals Only (63)
Synchronising Base Station and SMIQ (64)
Generating Test Signals (64)
10Literature (65)
11Abbreviations (66)
12Hardware and Software Requirements (67)
3GDemoBS Hardware Requirements for PC (67)
3GDemoBS Software Requirements for PC (67)
Options required for FSIQ and SMIQ (67)
13Ordering information (70)
14Contact (70)
1Overview
This application note describes how to measure the various WCDMA
signals which are used for transmitter tests on FDD base stations with an
FSIQ signal analyzer, and how to generate the diverse stimulus signals
needed for receiver and performance tests with an SMIQ signal generator.
The demo program 3GdemoBS is included. Run 3GDemoBS to set up the
instruments and carry out the tests to TS 25.141 via remote control.
Figure 1 shows the basic test set up for this application note:
Fig. 1: Basic test set up
滚珠滑轨
The combination of SMIQ and FSIQ can run every test that the specification TS 25.141 stipulates. Some tests, however, need two SMIQ generators, or
additional signal sources for interference. For these cases, the program
3GDemoBS demonstrates the principle of the tests, and generates the
single signals subsequently.
The program 3GDemoBS can also set up the SMIQ to provide any type of
test model and uplink reference measurement channel without running a
test.
Demo Mode:
If there is no base station available, simulate the downlink signal with SMIQ.
For receiver and performance tests, monitor the uplink test signal with
FSIQ. Both tasks are supported by 3GDemoBS automatically.
The demo program is distributed as source code; adopt the remote control
commands and test sequences for your own test routines, and integrate
FSIQ and SMIQ into your test systems with maximum ease.imerj
To modify the code and generate a version of your own, you need the
LabWindows CVI software from National Instruments Rev. 5.5 or higher.
The following pages describe how to use the 3GDemoBS demo program
电热丝
绕线机and give a detailed description of each transmitter, receiver and
performance test.
Notes:For 3GPP base stations, Rohde & Schwarz offers the
TS9850 Test System, for measurements at the air interface
CMU200 / 300 Universal Radio Communication Tester, see
section Ordering Information.
An overview of the application notes currently available for
3GPP from Rohde & Schwarz is given in section 10 on
page 65.
For a list of abbreviations used in this application note, see
section 11 on page 66.
2Installing of the demo program 3GDemoBS
The 3GPP tests require some specific hardware and software options in
both the SMIQ generator and FSIQ analyzer.
1. Check the hardware and software requirements. See the section 12 on
page 67.
2. Install the 3GDemoBS demo program on your computer. You need the
four files:
• 3GDemoBS.MSI
• DistFile.cap
• Setup.ini
•
Download the sites from
hde-schwarz --> products --> Application Notes
Search for 1MA38.
If the Microsoft Installer is not yet available at your PC, download it 测量
空间 from the R&S website containing 1MA38, and install it first.
3.
4. Follow the instructions of the installation dialog.
Note:If the installation program finds an older version of 3GdemoBS on
your computer, it will deinstall this version first. After the
deinstallation, again to install the new version.
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