ESVD,EMI接收機^ESVD 品 牌：德國羅德與施瓦茨 | 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. 專業銷售，租賃，回收二手頻譜分析儀，信號源，網絡分析儀，示波器，無線電綜合測試儀，音頻分析儀,噪聲系數分析儀，WIFI測試儀，手機綜合測試儀，EMI測試儀，天饋線分析儀，功率計，頻率計，校準件，函數信號發生器，電源，GPIB卡，萬用表，衰減器等測試儀器 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