ESVD,EMI接收机^ESVD 品 牌：德国罗德与施瓦茨 | R&S | Rohde&Schwarz Rohde & Schwarz ESVD EMI Test Receiver, 20 MHz - 1 GHz (2 GHz) The R&S ESVD Test Receiver is equally suitable for the measurement of signal strength and interference. For planning and operation of mobile radio networks it is important to know the propagation conditions in the area to be covered. The ESVD Test Receiver features optimal bandwidths for mobile radio services as well as a high measurement rate so that it is ideal for fixed and mobile coverage measurements. The number of measurements required to ensure electromagnetic compatibility is continuously increasing in the field of RFI measurements. Thanks to the built-in intelligence of Test Receiver ESVD, the time required for such measurements is reduced considerably. Being also a specialist for EMI measurements to CISPR, CENELEC, ETSI, FCC, VCCI and VDE standards, the ESVD can furnish results more rapidly and accurately than has been possible up to now. 专业销售，租赁，回收二手频谱分析仪，信号源，网络分析仪，示波器，无线电综合测试仪，音频分析仪,噪声系数分析仪，WIFI测试仪，手机综合测试仪，EMI测试仪，天馈线分析仪，功率计，频率计，校准件，函数信号发生器，电源，GPIB卡，万用表，衰减器等测试仪器 The R&S ESVD Test Receiver for digital mobile radio networks is a triple-conversion heterodyne receiver covering the frequency range from 20 to 1000 MHz (2050 MHz optionally). Its main features and facilities are: * RF attenuator switchable in 10-dB steps in the range 0 to 120 dB * One preselector with fixed tuning and five tracking preselectors, option ESVD-B2 with four additional filters with fixed tuning * Preamplifier with wide dynamic range, can be switched between preselector and 1st mixer * Crystal-stabilized synthesizer as 1st LO, variable in 100-Hz steps, sweep mode for fast frequency scans; frequency accuracy complying with GSM recommendations * High-level mixer ensuring high isolation of 1st LO for converting the input frequency to the first IF (1354.7 MHz or 394.7 MHz) * High-level mixers for conversion to the second (74.7 MHz) and third (10.7 MHz) IF * IF filters (10 kHz, 120 kHz, 300 kHz and 1 MHz) in the third IF stage with group-delay optimization * Precise I/Q demodulator * Highly linear envelope detector with more than 70 dB dynamic range * Peak, average and quasi-peak detectors operating in parallel, which enables simultaneous measurements in different weighting modes * Peak indication with IF bandwidth correction factors for measuring broadband interference (PK/MHz) automatically taken into account * Measurement monitoring by means of automatic overload detection in the relevant ESVD stages and by the permanently activated peak detector * Logarithmic amplifier with more than 70 dB dynamic range * 12-bit A/D converter with short conversion time