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SR5500
Data Sheet
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User Guide
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User Guide
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Spirent SR5500 Data Sheet

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Wireless Channel Emulation
SR5500 WIRELESS CHANNEL EMULATOR
The SR5500 re-creates RF fading and interference effects for testing wireless receivers. An advanced fading engine ensures accurate testing of sophisticated technologies like HSPA, HSPA+, EV-DO, E-UTRA (LTE), UMB, WLAN and WiMAX.
APPLICATIONS
Research and Development
Diversity
The SR5500 emulates wideband radio channel charac­teristics such as time-varying multi-path delay spread, fast fading, shadow fading and channel loss for advanced receiver implementations using diversity, beamforming and MIMO. The emulator replicates real-world spatial channel conditions, making it possible to isolate per­formance issues early in the development and design verification cycle. Additive White Gaussian Noise (AWGN) further enhances the real-world conditions emulated by the SR5500.
BENEFITS
Confidence in test results – The industry’s cleanest
channel and most statistically accurate fading lead to the most dependable and repeatable test results. Test next-generation, high-order-modulation schemes with confidence.
Efficient setup with less chance of error –
Pre-configured fading models are ready to run. An intui­tive interface minimizes errors, decreasing the chance of erroneous results.
A 2-channel, 24-path system can scale up
Modularity –
to 8 RF I/O ports, 16 digital channels, and 384 paths running under a single GUI. Re-use SR5500 “building blocks” to create multiple independent test setups.
Wireless Channel Emulation
SR5500 WIRELESS CHANNEL EMULATOR
KEY FEATURES
Advanced user interface makes testing effi­cient and less susceptible to operator error
Optional AWGN provides extremely accurate C/N ratios
UNSURPASSED ACCURACY
A key SR5500 value proposition is in the fading engine, where it really counts.
The design of a channel simulator must control instrument parasitics like phase noise, spuri­ous signals and poor channel flatness, so that only controlled impairments are applied to the signal. Residual EVM of the SR5500 exceeds the requirements of any known wireless test standard.
Real-Time Fading Engine
Accurate receiver testing requires real-time creation of the channel’s dynamic parameters. For example, consider a “buffer playback” sys­tem that repeatedly plays back a 10-minute sequence of fading coefficients. Running a ten minute test twelve times is not the same as running a two-hour test with a non-repeating fading sequence. This has a significant effect on the statistical confidence of test results.
“Buffer playback” systems introduce errors by failing to meet statistical requirements due to finite sequence lengths of the playback memory. The SR5500’s real-time fading engine accurately generates fading coefficients in real time, eliminating this systematic error.
Integrated Power Meters
To ensure the accuracy of signal levels and carrier-to-noise ratios, each channel has an independent, real-time digital power meter at both the input and output. Bursty signals as well as constant-envelope signals can be mea­sured and their levels set with a high degree of precision – critical when testing near receiver performance breakdown limits.
Each RF port has a digital power meter at both the input and output
Integrated AWGN for Accuracy
An optional all-digital baseband AWGN gen­erator meets the requirements of all wireless test standards requiring multi-path fading and AWGN. This integrated impairment eliminates the need for external measuring equipment on the bench. More importantly, it provides a level of C/N precision (~ 0.1 dB accuracy) that can’t be matched by a peripheral noise source.
These key performance attributes are not always apparent at the point of sale, but form the basis of Spirent’s approach to channel emulation. Hundreds of repeat customers have benefited from the difference made by experi­ence and attention to detail.
Wireless Channel Emulation
SR5500 WIRELESS CHANNEL EMULATOR
DYNAMIC ENVIRONMENT EMULATION (DEE)
Spirent’s DEE permits you to customize and automate testing by creating a controllable dynamic environment. A simple Excel spread­sheet becomes a powerful control script that manipulates power, delay, fading and other parameters on a per-channel or per-path basis. DEE offers more complete control of environ­mental parameters than any other dynamic channel emulation available.
Wireless systems are being deployed for use in high-velocity scenarios, such as high-speed “bul­let” trains. Testing requires a fine level of time resolution and accuracy. With state durations down to 10 ms, DEE can be used to automate testing for the most demanding deployments.
With DEE, a simple spreadsheet becomes a powerful control script
INTUITIVE USER INTERFACE
TestKit SR5500 software has been designed to create the most intuitively useful control envi­ronment available.
The complexities of simulating a wireless envi­ronment are presented as a logical flow, and even the most complex emulations can be set up with a few mouse clicks and minimal key­board interaction. Thanks to the real-time fad­ing engine, there’s no need to wait for a fading profile to compile. For many test scenarios, this can cut the test session time in half.
The Test Assistant Wizard
Spirent’s exclusive Test Assistant helps you set up a standards-based scenario with a few mouse clicks.
One click selects the technology being tested. A second selects the type of device under test, and a third selects the channel number. The fourth mouse click selects desired fading model, and the last starts the simulation.
The SR5500 Test Assistant setup wizard
Automatic Parameter Checking
The TestKit software validates input selections and entries by checking dependencies within related parameters. When dependencies exist, the software will offer to adjust dependent parameters at the time of entry, and allow the user to choose whether or not to make the change. Details like this help to avoid common but critical setup mistakes.
TestKit SR5500 graphically provides real-time feedback from the fading engine, providing a visual check during test execution.
TestKit SR5500 continually provides visual feedback
...then re-use the building blocks in separate test stands
...or it can be used as two fully functional 2 x 2 emulators
...or 4 x 4* MIMO
*Projected 1st half ‘08
Wireless Channel Emulation
SR5500 WIRELESS CHANNEL EMULATOR
MODULAR ARCHITECTURE
SR5500 “building blocks” can be combined to provide up to 8 RF I/O ports and 16 synchro­nous channels (384 paths), letting you add system capacity as your needs become more complex. A single user-friendly GUI controls the system, no matter how much capability has been added.
Each building block can be used as a fully functional SR5500 with 2x2 MIMO capability. Additional building blocks can be added for more complex MIMO testing. As testing needs change, these units can be easily separated to create different or multiple independent test stations.
PROGRAMMABLE INTERFACES
Application Programming Interface (API)
The SR5500 API is an ideal way to imple­ment software control of the SR5500, and can be accessed via .NET and COM program­ming environments. An SR5500 (or multiple SR5500s) can be readily controlled and moni­tored using Visual Basic, Visual C++, LabView, LabWindows, TestStand programs and scripts.
Extensive hyperlinked help ensures that cod­ing is economical and functional. Programming examples are also available.
Remote Programming Interface (RPI)
The SR5500 RPI provides a clean, simple script-based command set for TCP/IP or GPIB control of the SR5500. Users of the TAS4500 fading emulator now have a straightforward way to convert existing code and take advan­tage of the SR5500’s superior RF channel emulation.
The RPI can be used with any IP or GPIB inter­face, allowing programmed SR5500 control from any machine running any operating sys­tem. Perl scripts under UNIX/Linux or VB scripts under older versions of Windows can all harness the power of the SR5500 system.
Wireless Channel Emulation
SR5500 WIRELESS CHANNEL EMULATOR
Spirent is a contributing member to the industry's leading standards bodies
The WiMAX Forum logo is a trademark of the WiMAX Forum. The FLO Forum logo is a trademark of the FLO Forum. The 3GPP2 logo is the property of the 3rd Generation Partnership Project 2. The 3GPP logo is a trademark of the European Telecommunications Standards Institute.
Wireless Channel Emulation
SR5500 WIRELESS CHANNEL EMULATOR
TECHNICAL SPECIFICATIONS
The following specifications describe warranted performance over the temperature range 0 – 40° C and include a 30-minute warm-up time from ambient conditions.
RF Inputs
RF Outputs
Digital Channels
RF Configurations
Bandwidth
RF Input
Input Power Meter Modes
RF Output Level Range
2 (inter-unit synchronization allows up to 8)
2 (inter-unit synchronization allows up to 8)
2 per unit (4 with MIMO Option, future expansion to 8)
SISO, SIMO, MISO, MIMO (2x2, 2x4, 4x2, 4x4), and Beamforming
26 MHz
Frequency Range
(w/ 6-GHz-EX option) 3300 – 3850 MHz, 4100 – 6000 MHz
Level Range
(w/ 6-GHz-EX option) -5 to -32 dBm @ 3300 to 3850 MHz
(w/ 6-GHz-EX option) -5 to -32 dBm @ 4100 to 6000 MHz
Level Resolution
Damage Level
(w/ 6-GHz-EX option) -35 to -110 dBm @ 3300 to 3850 MHz
(w/ 6-GHz-EX option) -40 to -80 dBm @ 4100 to 6000 MHz
400 – 2700 MHz
+5 to -32 dBm @ 400 to 2700 MHz
0.1 dB
> +20 dBm
Continuous RF Burst-triggering for gated signals Settable duty cycle
-30 to -110 dBm @ 400 to 2700 MHz
Resolution
Accuracy
Residual EVM
RF Port VSWR
Independent Paths
Relative Path Delay
Relative Path Loss
Technical specifications are subject to change without notice.
Better than -36 dB, typical per subcarrier measured at -50 dB output power; actual value depends upon signal format, symbol rate, etc.
Better than 1.5:1
24 (24 paths per channel w/ MIMO option)
0 – 2000 µs, 0.1 ns resolution
0 – 32 dB
0.1 dB
± 1 dB
Wireless Channel Emulation
SR5500 WIRELESS CHANNEL EMULATOR
Dynamic Power Delay Profiles
Dynamic Environment Emulation
Standards-Based Models
Fading Engine Type
Fading Types
Log-Normal Fading Fading Rate
Birth-death, Sliding (moving propagation) Supports dynamic change of path number, relative power and delay
Controllable Parameters
Channel Model Update Rate
WiMAX, UMTS, CDMA2000®, WLAN, GSM, and pre-standard models available from Customer Service Center
Real-time generation of fading environment
Fading Velocity
Repetition Interval
Relative Phase
Rician K factor
Level Crossing Rate (LCR) Accuracy
Fading Power Spectrum
Correlation
State duration, channel output level, AWGN on/off, C/N, path on/off, relative power and delay, LOS AoA, K factor, frequency shift, and Doppler velocity
100 times per second
Rayleigh, Rician, freq shift, phase shift
0.1 to 2398.33 km/h @ 900 MHz; Resolution of 0.1 km/h
> 24 hours
0 – 360 degrees, 0.1 degree resolution
-30 to +30 dB
< ± 2.5% deviation from theoretical LCR curve of the simulated vehicle velocity
Classical 6 dB, Flat, Classical 3 dB, Rounded, Rounded 12 dB
Envelope and Component; Complex correlation is included with MIMO option
0.00 to 20.00 Hz
Standard Deviation
MIMO Option Modes
AWGN Option C/N Ratio
Accuracy
Bandwidth
Fidelity
Sequence Duration
Settable Modes
Control Interface
Other 10 MHz internal reference accuracy
Ethernet or GPIB
AC Power
Dimensions
Weight
0 to 12 dB
Baseline 2x2 Modularily expandable to uni/bi-directional 2x4, 4x2, 4x4
-30 to +32 dB
±0.1 dB for -20 to 15 dB ratios
26, 13, 6.5, 3.25, 1.625 MHz
Meets or exceeds all 3GPP, 3GPP2, WLAN, WiMAX, and LTE requirements
> 2 hours
C/N, C/No, Eb/No
1 ppm, can be locked to external reference
250 watts typical steady state 45 watt maximum additional for 6 GHz Option
19-inch rack mountable Height/Width/Depth: 8.75”/16.88”/21” (22.22 cm/42.88 cm/53.34 cm)
65 pounds (29.5 kg)
Wireless Channel Emulation
SR5500 WIRELESS CHANNEL EMULATOR
ORDERING INFORMATION
Wireless Channel Emulator: P/N SR5500M-24
MIMO w/ 24 paths per channel and Complex Correlation (Option): P/N SR5500-MIMO
SR5500 6 GHZ Extended Frequency (Option): P/N SR5500-6GHZ-EX
Please see your Spirent Regional Sales Manager for help in selecting the configu­ration that best meets your needs.
SPIRENT GLOBAL SERVICES
Spirent Global Services provides a variety of professional services, support services and education services — all focused on helping customers meet their complex testing and service assurance require­ments. For more information, visit the Global Services website at www.spirent­com.com/gs or contact your Spirent sales representative.
© 2007 Spirent Communications, Inc. All of the company names and/or brand names and/or product names referred to in this document, in particular the name “Spirent” and its logo device, are either registered trademarks or trademarks pending registration in accordance with relevant national laws. All rights reserved. Specifications subject to change without notice. Rev. D 12/07
Spirent Communications
Performance Analysis, Wireless and Positioning 541 Industrial Way West Eatontown, NJ 07724 USA
Spirent Communications 1325 Borregas Avenue Sunnyvale, CA 94089 USA
SALES AND INFORMATION
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T: +33 1 6137.2250
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