ElectroVoice-ELX1A-mix-维修说明书手册含电器原理图

Electroloice'ELX-1ARack-Mount Mic/Line MixerFour inputs,one output in a singlerack spaceVery-high-quality audio performance◆High reliabilityExtensive filtering circuitry andshielding protect against rfinterference.Power from 115/230-V ac or external dcTransformer-isolated outputHeadphone output with separatepower amp and level controlSwitchable 1-kHz oscillatorSwitchable output limiter preventsclipping·30-V phantom powerKEY GENERAL SPECIFICATIONSMaximum Voltage Gain,+2 dBNet Weight:Conditions:Mic Input to Main Output:3.36kg(7.41b)1.0dBu=0.775Vms.91 dBShipping Weight:2.0 dBm 1 mW into 600 ohms (0.775 VMic Input to Headphone Output:4.1kg(9.01b)across 600 ohms).82 dB3.Measurements are referred to a 1-kHzMic Input to Stacking Output (modifiedDESCRIPTION0-dBu sine-wave input unless noted.for insert patching):The Electro-Voice ELX-1A mixer is a compact,4.Measurement bandwidth is restricted to63 dBhigh-performance audio mixer designed for30 kHz unless noted.Common-Mode Rejection,20-20,000 Hz:professional applications where clean audio5.Load impedance is 600 ohms unless60 dB,typicaland reliable operation are important.Featuresnoted.Low-Cut Filter,and performance make the ELX-1A ideallyFrequency Response,Any Input to AnySlope:suited for broadcast and production recordingOutput(0-dBm output,500-kHz measure-6 dB per octaveapplications.The ELX-1A can mount in a singlement bandwidth):Corner Frequency:rack space or set on any surface.Extensive rf30-20.000Hz,+0/-1dB100Hzfiltering circuitry and shielding provide protec.Total Harmonic Distortion Plus NoisePhantom Power(mic inputs only,3,600-tion against rf interference.Mic/LIne Output,ohm equlvalent source resistance):+4dBm,20-20,000Hz:30-V dc3The block diagram is shown in Figure 1.Figurec0.15%Power Requirements,2 shows the front and rear panels.+18dBm,50-20,000Hzac:GENERAL FEATURES0.15%115 or 230 volts,switchable,Stacking or Headphone Output,50/60 Hz,12 wattsOptimum circuit design provides flat+18dBm,20-20,000Hz:External dc:*frequency response,low distortion and lownoise.<0.10%24-45 volts,100-mA maximumEquivalent Input Noise(mic input,Colors,Materials and Finishes,Space-saving.compact design usesonly one rack space (1.75 in.).maximum gain,150-ohm source,Chassis:Powerable from ac line or external“A"weighted):Dark gray painted metal withdc source,with automatic switchover:-130 dBm,typicalwhite graphicsdetachable line cord.Output Noise,Inputs Down,"A"Weighted,Knobs:Electro-PulseTM indicator shows powerMaster Down:Medium gray with light gray insertsstatus.s-82 dBmSwitches:Switchable,low-distortion 1-kHz sine-waveMaster at Nominal:Light grayoscillator facilitates level calibration.s-81 dBmDimensions,Master Full Up:Height:Ten-segment,three-color PPMLEDbargraphmeter shows peak output level and has clips-68 dBm4.45cm(1.75in.)indicators;can be converted intemally to VUWidth:characteristics.1.For Other General Specificalions,Input Specifications.48.3cm(19.0in.)Switchable output limiter prevents clipping:Depth:21.0cm(8.25i