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Technical Overview
cdma2000®/1xEV-DV and 1xEV-DO Modulation Analysis
Gain a thorough understanding of your signal’s performance using Option B7T cdma2000®/1xEV-DV and Option B7W for 1xEV-DO modulation analysis.
With Option B7T, you can descramble, despread and demodulate forward link and reverse link cdma2000, spread rate one (SR1) modulated signals. Optionally, you may also enable analysis of forward link 1xEV-DV signals.
Option B7W allows you to descramble, despread, and demodulate signals modulated by the 1xEV-DO Revision 0 standard. This option supports configurations in the reverse link (mobile station or access terminal) and forward link (base station or access network) channels.
Both options will automatically identify all active channels regardless of the symbol rate or Walsh code length. Signal analysis capabilities include composite code domain power, composite time, and channel specific analysis.
Display up to 20 measurement traces or tables simultaneously, with up to 20 markers per trace. For maximum visibility into your signal, look at pre-demodulated signal data, CDP and CDE trace data for the composite signal or a specified code layer; or error data for a single code channel, or the composite signal.
cdma2000, 1xEV-DV, and 1xEVDO are just some of over 70 signal standards and modulation types for which the 89600B vector signal analysis (VSA) creates a window into what’s happening inside your complex wireless devices.
The 89600B tools provide views of virtually every facet of a problem, helping you see the “why?” behind signal problems. Whether you’re working with emerging or established standards, Keysight’s industry-leading 89600B VSA software helps you see through the complexity.
Key Features
– Troubleshoot and evaluate signals with robust toolset
– Descramble, despread and demodulate forward and reverse-link signals
– Quickly analyze signals with automatic active channel detection
– Examine CDP and CDE errors for a single layer or composite signal
– Get a 20:20 view of the overall signal using 20 traces, each with 20 markers
cdma2000/1xEVDV/1xEV-DO technology overview
As the wireless industry moved into its third generation, data services started to become a larger portion of the industry’s revenue stream.
Short message service (SMS) and packet data emerged as the two dominant types of data services. SMS systems operate on circuit switched networks with great efficiency. Since SMS message length is limited, data can be sent to a phone in a single message on the control channel.
However, applications that require large data packets, such as internet browsing or streaming video, require higher throughput than an SMS system can handle.
Packet-data systems can, however, handle the throughput requirements of services such as internet browsing and streaming video, as resources are assigned only as needed for the data transfer and may be shared among many users with real time low control.
The 1xEV-DV format is best suited for SMS systems and maintains backward compatibility, while the 1xEV-DO standard is optimized for packet data service. The 1xEV-DO standard can incorporate these data-only services into a 3G system by sacrificing voice service parameters to increase packet data throughput, providing new capability at the expense of backward compatibility.
Option B7T supports the following standard:
– 1xEV-DV: 3GPP2 C.S0003-C Medium Access Control (MAC) Standard for cdma2000 Spread Spectrum Systems version 1.0
Option B7W supports the following 1xEV-DO standards:
– 3GPP2 C.S0024 v2.01 1xEV-DO High Rate Packet Data Air Interface
– 3GPP2 C.S0032 1xEV-DO Inter-Operability Specification (IOS) for CDMA 2000 Access Network
– 3GPP2 C.P9012 Recommended Minimum Performance Standards for 1xEV-DO High Rate Packet Data Access Terminal
– TIA/EIA/IS-856 1xEV-DO High Rate Packet Data Air Interface Specification
Analysis and Troubleshooting
Gain insight into your signal with 20:20 visibility at the composite or layer level
The 89600B displays up to 20 traces with 20 markers each, letting you display CDE and CDP trace data for a specific code layer, as well as that layer’s EVM and IQ error traces. You can also look at a channel’s demodulated symbols and view its associated EVM errors.
Gain insight into your signal with 20:20 visibility at the composite or layer level
The 89600B displays up to 20 traces with 20 markers each, letting you display CDE and CDP trace data for a specific code layer, as well as that layer’s EVM and IQ error traces. You can also look at a channel’s demodulated symbols and view its associated EVM errors.
Open a window into your signal’s underlying behavior with detailed measurement parameter control
Choose the desired despread channel and CDP layer for display, as well as your analysis channel and modulation type, and provide long code masks and other format parameters. You can select active channel detection, semi-automatic detection, or predefined active channel detection.
The 89600B provides you with tools to handle standard signals, as well as to set up the analyzer for identification of failed test causes. Additionally, you can save your measurement setup for easy recall at a later time.
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