Harman Kardon DPR 1001, Руководство по обслуживанию

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20 KHz
With a 0 dBFS, 20 KHz sinewave PCM
bitstream, and Main Volume at 20 dB below
Max, set meter to read THD+N Ratio, with %
units. Use 10 Hz-22 KHz BW. Read THD+N
Ratio, on both FL and FR Speaker Outputs.
% <0.25 <0.15
4
IMD(SMPTE) Coaxial 1
Sine wave # 1 f
=80Hz. Ampl=4,
sine wave # 2 f= 2
KHz. Ampl=1
With a 0 dBFS, SMPTE (80 Hz-4X:2 KHz-1X)
waveform PCM bitstream, and Main Volume
at 20 dB below Max, set meter to read
SMPTE/DIN Distortion, with % units. Read
SMPTE/DIN Distortion, on both FL and FR
Speaker Outputs.
% 0.6 0.4
5
S/N RATIO,IHF-A FILTER Coaxial 1
With a 0 dBFS, 1 KHz sinewave PCM bitstream, and Main Volume
at 20 dB below Max, record the Output Voltage at FL and FR
speaker outputs to be the 0 dBr Reference value. Set Digital
Generator amplitude to -999 dBFS (Generator turned off),Then
set meter t
dB >85 > 90
Coaxial 1
With a 0 dBFS, 1 KHz sinewave PCM bitstream, and Main Volume
adjusted to obtain 1 W output into an 8 ohm load. Record the
Out
Voltage at FL and FR speaker outputs to be the 0 dBr
Reference value. Set Digital Generator amplitude to -999 dBFS
dB > 70 >75
6
Coaxial 1 20 Hz
With a 0 dBFS, 1 KHz sinewave PCM
bitstream, and Main Volume at 20 dB below
Max, record the Output Voltage at FL and FR
speaker outputs to be the 0 dBr, 1 KHz
Reference value. Set meter to read
Amplitude
,
with dBr units, and
a 10 Hz-500 KHz BW. Then, ch
dBr > -0.7 > -0.3
Coaxial 1 20 KHz
,
dBr > -3 > -2
FREQUENCY RESPONSE
11
put
(Generator turned off),Then
meter t set
With a 0 dBFS, 1 KHz sinewave PCM
bitstream, and Main Volume at 20 dB below
Max, record the Output Voltage at FL and FR
speaker outputs to be the 0 dBr, 1 KHz
Re
with dBr units, and
a 10 Hz-500 KHz BW.
fe
Then, ch
rence value. Set meter to read
Amplitude
DPR1001 harman/kardon