======================================================================== 深圳市迈凯瑞仪器仪表有限公司 超低价，成色新，测试合格后再付款，欢迎体验测试，服务好 联系人：姚小姐：电话 QQ: 廖先生 QQ： 公司：深圳市迈凯瑞仪器仪表有限公司 地址：深圳市龙华新区东环一路天汇大厦D栋6楼D-615室 ======================================================================== Outline The VA-2230A is a high-performance à î multifunction audio analyzer featuring a measuring signal generator with fast response and high stability and 10 measuring functions. It consists of a measuring signal generation block incorporating a programmable (DDS) oscillator and high-speed measurement block which processes signals using a notch filter à î HPF and LPF and applies DSP computations. The 10 measuring functions include the frequency measurement à î AC level measurement with a wide bandwidth up to 210 kHz à î wattage measurement à î total distortion measurement à î total harmonic distortion measurement à î high-order harmonic analysis à î S/N ratio measurement à î L/R ratio measurement à î SINAD measurement and DC level measurement. These functions can be used independently or can also be combined with the signal generation block to build audio measuring systems with low noise à î high accuracy and high speed. With digital technology invested everywhere à î the VA-2230A makes possible fully automated measurements including automatic range switching and automatically synchronized measurement data output. In addition à î it is also packed with a multiplicity of versatile functions including a preset memory for storing and recalling up to 100 measure-ment condition settings à î a limiting function using zone display with GO/NO-GO judgment of the measurement results à î an auto sequencing function which recalls the preset memory settings in sequence à î a printer output for printing the measurement results à î an EXT I/O for remote control and a GP-IB as standard. Features DSP for Measurements Based on FFT Computations True rms measurements based on FFT are made possible by the DSP. The distortion measurements include the total distortion measurement (THD N) as well as the total harmonic distortion measurement (THD) and the harmonic analysis (HD) which have previously been available only with high-grade tools. DDS Signal Generator with Low Distortion The signal generator is capable of low-distortion signal oscillation based on the DDS (Direct Digital Synthesizer) method with a high 50 ppm frequency stability. The setting can be made at a high speed. Large LCD for Versatile Display Three display modes include a numeric display mode (PAGE 1), an analog meter mode (PAGE 2) and a limit mode for use in GO/NO-GO judgments (PAGE 3). Excellent Operability Menu operations are performed based on selections using function keys， while direct keys are used to switch the output channels and measuring items. The output value settings can be modified using the numeric keys or the jog /shuttle keys. GP-IB Provided as Standard The GP-IB is now standard production line item. It also makes system expansion easy by enabling the transfer of memory contents between tools of the same model (memory copy), and the synchronized recalling of preset memory, etc. Floating Switching The GND circuits of the signal generation block, AC measurement block and DC measurement block are separate and each can be floated from the cabinet independently of the others. SINAD Measurement The SINAD measurement makes the analyzer usable in the field of communications equipment as well as in the field of audio equipment. Two Input/Output Channels While the signal generation and measurement blocks are composed of single-channel circuitry, signal switchers are built in to allow the input and output of 2 channels of signals. This makes possible the measurements of crosstalk, signal separation and L/R ratios. Other Major Features The frequency range of the frequency counter and AC level measurement functions is expanded up to 210 kHz to enable the head bias adjustment of the tape decks. Relative measurement is possible in AC level measurement while wattage display (virtual load) is possible when simulating a loudspeaker, etc. The BAL/UNBAL input capabilities make possible the non-grounded measurement of high-power amplifiers, etc. 100-step sequence memory, which can be divided into 10 groups. I/O ports for external control and printing out.