It is used as the access method in many mobile phone standards. IS-95, also called "cdmaOne", and its 3G evolution CDMA2000, are often simply referred to as "CDMA", but UMTS, the 3G standard used by GSM carriers, also uses "wideband CDMA", or W-CDMA, as well as TD-CDMA and TD-SCDMA, as its radio technologies. Many carriers (such as AT&T and Verizon) shut down 3G CDMA-based networks in 2022, rendering handsets supporting only those protocols unusable for calls, even to 911.[3][4]
Cellular networks continue to grow at a rapid pace around the world. In many regions, network operators are bringing cdma2000 1xEV-DO capabilities into commercial service as part of the evolution towards Third-Generation (3G) networks.
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This technical brief will introduce the reader to cdma2000 1xEV-DO wireless network concepts and will provide understanding and insight into the air interface. In order to assist maintenance personnel in achieving the high data rates promised by EVDO technology, a particular focus will be given to base station forward-link transmissions. We begin with a review of the evolution of cdma2000 1xEV-DO, followed by a description of the forward-link air interface and key RF parameters. We will then discuss some of the testing challenges in cdma2000 1xEV-DO and describe state-of-the-art test tools that can help wireless networks meet quality of service (QoS) goals.
The first CDMA standard commonly deployed by wireless service providers was IS-95A. It contained the core elements for voice transmission that are present in all later versions. Additional standards such as J-STD-008 and IS-95B were released after IS-95A to enhance performance and accommodate various frequency bands around the world. The series of standards released in this time period are collectively known as cdmaOne. The CDMA wireless technology evolution is shown in Figure 1.
The Tektronix NetTek analyzer is a handheld, multi-standard BTS field measurement tool. When equipped with the YBT250 test module, the NetTek analyzer is ready to troubleshoot and verify EVDO base stations quickly and easily. The YBT250 test module can be used for many other wireless standards as well, including, IS-95 and cdma2000 1xRTT.
cdma2000 1X EV-DO brings important new capabilities to CDMA-based networks, and is becoming a reliable revenue generator for operators. EVDO is one of the least costly upgrades on the path to 3G technology, yet it provides unmatched data rates though its dedicated data channel. Operators, keenly aware of the benefits of bringing data features to market in the shortest possible time, are racing to qualify and install EVDO in their networks.
RF Signal Generators, in particular, are a focal point in the signal generators market. These generators are designed to generate radio frequency signals, which are essential for a plethora of applications, including wireless communication, radar, and electronic warfare. The versatility and precision of RF signal generators make them indispensable tools in research and development, manufacturing, and quality assurance.
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