Harman Kardon DPR 1001, Руководство по обслуживанию

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8 FREQUENCY RESPONSE 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
Digital Input data is a 96 KHz sampling r ate, 24 bit, no Pr e-emphasis, PCM bitstr eam.
ⷍ
FRONT AMP SECTION
No DESCRIPTION INPUT UNIT LIMIT NOMINAL
1
Dynamic Range Coaxial 1
With a 0 dBFS, 1 KHz sinewave PCM bitstream, and Main Volume
at 20 dB below Max, set meter to read THD+N Ampl, with dBr
units. Use 'A Weighting' filter, 10 Hz-80 KHz BW. Record the
Output Voltage at FL and FR speaker outputs to be the 0 dBr
Reference val
dB >90 >93
2
RESIDUAL NOISE Coaxial 1
With Digital Generator amplitude at -999 dBFS (Generator turned
off), 1 KHz sinewave PCM bitstream, and Main Volume at 20 dB
below Max, set meter to read Amplitude,10 Hz-22 KHz BW. Take
Amplitude readings on both FL and FR Speaker Outputs.
mVrms <1 <0.8
Coaxial 1
With Digital Generator amplitude at -999 dBFS (Generator turned
off), 1 KHz sinewave PCM bitstream, and Main Volume at 20 dB
below Max, set meter to read Amplitude,10 Hz-80 KHz BW. Take
Amplitude readings on both FL and FR Speaker Outputs.
mVrms <1.5 <1
Coaxial 1
With Digital Generator amplitude at -999 dBFS (Generator turned
off), 1 KHz sinewave PCM bitstream, and Main Volume at 20 dB
below Max, set meter to read Amplitude,10 Hz-22 KHz BW. Take
Amplitude readings on both FL and FR Speaker Outputs.
mVpk <3 <2
3
TOTAL HARMONIC
DISTORTION
Coaxial 1 20 Hz
With a 0 dBFS, 1 KHz sinewave PCM
bitstream, and Main Volume at 20 dB below
Max, set meter to read THD+N , with % units.
Use 10 Hz-22 KHz BW. Read THD+N Ratio,
with dBr units on both FL and FR Speaker
Outputs.
% <0.25 <0.15
1 KHz
With a 0 dBFS, 20 Hz sinewave PCM
bitstream, and Main Volume at 20 dB below
Max, set meter to read THD+N , with % units.
Use 10 Hz-22 KHz BW. Read THD+N Ratio,
with dBr units on both FL and FR Speaker
Outputs.
% 0.6 0.4
REMARK
10
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
DETAILED SPECIFICATIONS (CONT'D)