In telecommunication, a measuring receiver or measurement receiver is a calibrated laboratory-grade radio receiver designed to measure the characteristics of radio signals. The parameters of such receivers (tuning frequency, receiving bandwidth, gain) can usually be adjusted over a much wider range of values than is the case with other radio receivers. Their circuitry is optimized for stability and to enable calibration and reproducible results. Some measurement receivers also have especially robust input circuits that can survive brief impulses of more than 1000 V, as they can occur during measurements of radio signals on power lines and other conductors.
Measuring receivers are used with calibrated antennas to
●determine the signal-strength and standards-compliance of broadcast signals,
●investigate and quantify radio-frequency interference,
●determine compliance of a device with electromagnetic interference and TEMPEST standards and regulations.
Measuring receivers are also used without antennas to
●calibrate RF attenuators and signal generators.
Measuring receivers are widely used in metrology and calibration lab environments, spectrum monitoring and electromagnetic-compatibility facilities.
Receivers that are used for compliance testing have to fulfill the basic emc standard CISPR 16-1-1. CISPR 16-1-1 defines requirements for indication of CW Signals and pulses. The amplitude range where these requirements are met is called CISPR indication range. Within this range the receiver can be used for compliance tests. Usually EMI receivers have a CISPR indication range that starts about 6dB above the noise floor. The performance usually demonstrated by a linearity check for sinusoidal signals and broadband pulses. This linearity check is performed over the amplitude range starting from typical levels of 10dBuV. Some EMI receivers, even if called full compliant have a CISPR indication range that starts at higher levels e.g. 40dBuV. Typically for such a receivers only one level e.g. 60dBuV is presented. A demonstration of CISPR compliance at lower levels cannot be demonstrated.
Hot Tags: measurement receiver, China, manufacturers, Suppliers, Factory, buy, low price, in stock, Precision Picoammeter, Optical Spectrum Analyzer, Precision Impedance Analyzer, Semiconductor Analyzers, Digital Multimeter, Waveform Generator
