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  • Receiver Testing with the Anritsu MS2830A Signal Analyzer, MG3710A Vector Signal Generator, and S412E LMR Master
    Public safety receivers are built to perform in the harshest environments. Physically they appear to be up to any challenge. Some even work under water. Unfortunately, it is not easy to see how they will perform in a harsh RF environment. Narrowbanding moves adjacent channel performance to a new
  • Design Concepts for Semiconductor based Ultra-Linear Varactor Circuits (Invited)
    an. indication of the system-level responses for linear. varactors, a varactor-based "true" time delay phase. shifter is designed and the system-level linearity. parameters, like adjacent channel power ratio (ACPR). and error vector magnitude (EVM), are evaluated for. various application conditions
  • PA Linearization for Modern Communication Systems (.pdf)
    In third generation (3G) mobile communication systems, ultra linear amplification is required for complex modulation formats. Nonlinear amplification yields inter-modulation distortion (IMD) products and results in unacceptable spectral regrowth in the adjacent channels. To achieve ultra linear
  • Increasing the Maximum Transmit Power Rating of a Power Amplifier Using a Power Combining Technique
    the linearity performance of error vector magnitude (EVM). and adjacent channel power ratio (ACPR).
  • Thin Film Resonators and High Frequency Filters
    more apparent as spectrum crowding increases with use and the deployment of new systems into old spectrum allocations. Accordingly, there is a growing need for front-end filters that protect receivers from adjacent channel interference and output filters that limit the bandwidth of transmitter noise
  • Fiber Optic Rotary Joints
    . Crosstalk measures the amount of signal crossing between adjacent channels. The higher the figure, the lower the crossing. For example, 60 dB crosstalk represents crossing of 1 part per million to adjacent channels. Crosstalk requirement differs from system to system. In general, the higher the system
  • Semiconductor Optical Amplifier in Coarse Wavelength Division Multiplexed Systems
    in a CWDM system is generally required to amplify at least 4 adjacent channels. Gain bandwidth describes how the optical gain provided by the SOA changes with wavelength. Figure 2 shows typical gain variation with wavelength for SOA-1084 and SOA-1085. These. SOA show ~ 80 nm of 3-dB gain bandwidth
  • Agilent: Spectrum Analysis Basics
    . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .80. Display range and measurement range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .80. Adjacent channel power measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .82. Chapter 7 – Extending the Frequency Range
  • High Accuracy Temperature Measurement
    shares many of the same. signals can create system level issues when used. challenges faced by other measurement devices, in. with less capable hardware designs. A high level, or. addition to several challenges unique to this application. over-load condition, applied to a channel adjacent to a. area
  • AN116 Why Use Isolated Signal Conditioners?
    . although at very high sample rates, even this value. measurement errors that may go undetected. In its most. may be too high. exaggerated form, a nearly exact duplicate of one channel. appears on an adjacent channel to which nothing is. When source impedance cannot be controlled, an. connected. isolation

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