标准立体声***器 MSDC2
STANDARD STERODECODER MSDC2
厂家：德国罗德与施瓦茨 ROHDE&SCHWARZ
特性：
stereo multiplex input(balanced or unbalanced,selected with shorting link)
Frequency range:30Hz-75KHz
input impedance(balanced):≥40KΩ
Common-mode suppression:
at f<150Hz:≥58dB
150Hz<f<15KHz:≥46dB
15KHz<f<100KHz:≥36dB
input impedance(unbalanced):≥20KΩ
nominal input level(settable in 6-dB steps):-12 to +12dBm(0dBm=0.775v into 600Ω)
continuous input-level adjustment:&plu***n;3dB
overdrive limit:≥6.5dB
AF OUTPUTS
R,L,M outputs(floating,balanced)
nominal output level:+6dBm
output impedance:≤20Ω
Load impedance:≥200Ω
Level difference between L and R channels:≤0.1dB
S output(not floating,unbalanced)
nominal output level:+6dBm
output impedance:≤500Ω
Linear distorti***
frequency resp***e variati*** of L,R,M or S output
signal over the frequency range 30Hz to 15KHz
relative to 500Hz:≤&plu***n;0.15dB
Switchable deemphasis:50μs&plu***n;2%
alternatively(slide switch on printed circuit board):75μs&plu***n;2%
Linear crosstalk
crosstalk between M and S channels:≥46dB(typ.50dB)
crosstalk between L and R channels:
at 100Hz to 5KHz:≥60dB(typ.64dB)
30Hz to 15KHz:≥58dB(typ.60dB)
Nonlinear distorti***(L,R,M and S outputs)
Harmonic distortion at 6 and 12.5dBm:≤&plu***n;0.1%
Difference-frequency intermodulation distortion according to DIN 45 403 at 12.5dBm:d2:≤&plu***n;0.05%
d3:≤&plu***n;0.1%
weighted and unweighted noise(with 50-μs deemphasis)
unweighted signal-to-noise ratio relative to +6dBm
at 1000Hz,frequency range 30Hz to 100KHz,rms measurement:≥80dB
weighted signal-to-noise ratio relative to +6dBm,
peak-value measurement according to CCIR Recommendation 468-1:≥78dB
peak-value measurement according to DIN 45 405:≥80dB
Pilot-tone suppression relative to +6dBm:≥90dB
SCA suppression relative to +6dBm in frequency range 56 to 96KHz(SCA level-16dB relative tomultiplex signal):≥76dB
Indication on front-panel instrument
indication of L,R,M,S or pilot-tone level via selector switch
indicating error:≤0.2dB plus 1.5% of full scale value
pilot-tone indication:-7.5 to -17dB
AF indication(6 ranges in 10dB steps):+18 to -66dBm