A1 电路图.pdf

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1、 Mar. 98 / V2.0 / PhS, MBe N:#A1projUser ManualA1 UM V20A1UM20_E.DOC User Manual A1 Audio Test -3dB at 400Hz 10% 22.4Hz to 22.4kHz BP 60dB / decade; -3dB at 22.4Hz and 22.4kHz ( 10%) Crosstalk filter 40 dB / decade; Q = 5 Display Graphic 256*128 dot backlit LCD module Display Modes Measurement displ

2、ay 15mm high characters and 100mm wide bargraph Graphics Curves (Sweeps) Oscilloscope Input signal vs. time Interfaces Printer Interface Centronics interface (25pin Sub-D female connector) for printouts of sweeps, scope graphics and single measurement results. Serial Interface RS232C for remote cont

3、rol and data transfer with a PC General Data Size 274*396*132mm Weight approx. 7.5 kg A1 Audio Test 20 Autoscaling .20 Sensitivity .20 Block Diagram Input Stage. 15 BS 4847. 33 C CCIR 409. 33 CCIR-468. 30 Centronics Pin Assignment.48 Timing Diagram .48 Coarse Mode ( ). 17 Crosshair . 39 CROSSTALK Ab

4、solute Measurement.32 Measurement Function.32 Relative Measurement .32 Cursor. 22; 39 D DIN 45507. 33 DIP Switch Settings . 47 Display Analog .20 Bargraph.19 GRAPH.21 METER.19 Modes.19 Numerical Results.19 SCOPE.24 Sweeps.21 Unit.20 Distributors. 55 Drift (W 39 Mode.21 X-Scaling .23 Y-Scaling .22 Gr

5、ounding .12 I IEC 386 .33 Input Block Diagram .15 Connectors.13 Impedance.13 Impedance Option.11 Level.21 Installation.11 Inventory.11 J JIS C 5551.33 L LEVEL 2-Channel Input.35 A1 Audio Test 23 Selectable Input Impedance.13 SET REF.28; 31 Setup A1.45 DIP Switch.47 Signals Balanced.14 Speed Error (W 22