Benchmark MPA1 Manual de Instruções descarregar pdf (Página 21)

MPA1 Instruction Manual Page 21

THD Spectrum at 10 KHz

Audio Precision

02/19/07 11:09:3010 kHz FFT at 60 dB Gain, Output Level = +24 dBu, 0 dBr = +24 dBu

ColorSweep Trace Line Style Thick Data Axis Comment Cursor1 Cursor2

1 1 Red Solid 4 Fft.Ch.2 Ampl Left *-109.271 dBr A *-118.787 dBr A

-150

-100

-148

-146

-144

-142

-140

-138

-136

-134

-132

-130

-128

-126

-124

-122

-120

-118

-116

-114

-112

-110

-108

-106

-104

-102

-109.271

-118.787

2k 32k4k 6k 8k 10k 12k 14k 16k 18k 20k 22k 24k 26k 28k 30k

20.022k 30.0293k

dx=10.0073 kHz

dy=-9.515 dB

The above FFT plot shows that the MPA1 has very little harmonic distortion at high frequencies. The

10 kHz test tone is notched out with a THD analyzer to improve the resolution of the test. The 20-

kHz 2

-harmonic distortion measures better than -109 dB. The 30-kHz 3

-harmonic distortion

measures better than -118 dB.

1 2 ... 16 17 18 19 20 21 22 23 24 25 26 ... 29 30

Benchmark MPA1 1
Instruction Manual 1
Safety Information 2
Contents 3
Overview 4
Features 5
Connections 6
Output Signal Levels 7
Driving Unbalanced Loads 7
AC Power Entry Connector 7
Fuse Holder 7
Preamp Section 8
Phantom Power Switches 9
Input Protection 9
Polarity Switch 9
40 Hz High-Pass Filters 9
LED Output Level Meters 10
HPA2™ Headphone 11
Rack Mounting 12
Performance Graphs 13
Audio Precision 14
Inter-Channel Phase Response 15
THD+N vs. Frequency 16
Wideband THD+N vs. Frequency 17
Noise Spectrum 19
THD Spectrum at 1 KHz 20
THD Spectrum at 10 KHz 21
Specifications 22
Direct Outputs 23
HPA2™ Headphone Amplifier 23
AC Power Requirements 24
Dimensions 25
Warranty Information 28
Benchmark Extended Warranty 29
Calibration 30

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