5310 RMAA测试结果FAIL，请帮忙分析下是哪里出了问题

yuanzhong

5310　RMAA测试结果FAIL，请帮忙分析下是哪里出了问题，用的是普通的对录线。


RightMark Audio Analyzer test report
Testing device NOKIA
Sampling mode 16-bit, 44 kHz
Interface  
Testing chain External loopback (line-out - line-in)
RMAA Version 6.2.3
  
  
20 Hz - 20 kHz filter ON
Normalize amplitude ON
Level change -53.6 dB / -52.1 dB
Mono mode OFF
Calibration singal, Hz 1000
Polarity correct/inverted




Summary
Frequency response (from 40 Hz to 15 kHz), dB +45.79, -30.35 Very poor
Noise level, dB (A) -10.1 Very poor
Dynamic range, dB (A) 16.9 Very poor
THD, % 7.718 Very poor
THD + Noise, dB (A) -3.8 Very poor
IMD + Noise, % 81.485 Very poor
Stereo crosstalk, dB -63.1 Average
IMD at 10 kHz, % 168.312 Very poor
General performance  Very poor




Frequency response


From 20 Hz to 20 kHz, dB -30.35, +45.79
From 40 Hz to 15 kHz, dB -30.35, +45.79




Noise level


Left Right
RMS power, dB -11.2 -11.0
RMS power (A-weighted), dB -10.3 -10.0
Peak level, dB FS -6.0 -6.0
DC offset, % +0.3 +0.2




Dynamic range


Left Right
Dynamic range, dB +14.4 +13.0
Dynamic range (A-weighted), dB +17.6 +16.2
DC offset, % +0.34 +0.23




THD + Noise (at -3 dB FS)


Left Right
THD, % +7.7198 +7.7161
THD + Noise, % +76.1727 +80.5798
THD + Noise (A-weighted), % +60.8144 +67.9971




Intermodulation distortion


Left Right
IMD + Noise, % +74.2813 +88.6882
IMD + Noise (A-weighted), % +82.1485 +98.0779




Stereo crosstalk


Left Right
Crosstalk at 100 Hz, dB -70 -48
Crosstalk at 1000 Hz, dB -65 -59
Crosstalk at 10000 Hz, dB -58 -52




IMD (swept tones)


Left Right
IMD + Noise at 5000 Hz, 14.5402 14.9077
IMD + Noise at 10000 Hz, 247.9601 196.8299
IMD + Noise at 15000 Hz, 291.9247 243.7070