JBL JSR-400, Руководство по обслуживанию

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6
Dolby Pro-Logic Ò A/V Receiver JSR-400
Measuring methods in conformity with IEC standard 315
Measurement conditions AM - MW: Radio frequency = 1000/999kHz
Audio frequency = 400Hz
LW: Radio frequency = 207kHz
Audio frequency = 400Hz
Reference level = 5mV/m, 10mV/m on 50ohms
Modulation = 30%
Test Point: MW TP1 = (600)kHz TP2 = (1000)kHz TP3 = (1400)kHz
LW TP1 = 162kHz TP2 = 207kHz TP3 = 252kHz
AM Section
NO. DESCRIPTION UNIT LIMIT L/R NOMINAL L/R
1
TUNING RANGE LOW ~ HIGH
MW
LW
STEP AUTO/Man.
kHz 520~1710
kHz
kHz
10
2
USABLE SENSITIVITY MW TP 1
TP 2
S/N = 20dB TP 3
LW TP 1
TP 2
TP 3
uV/m £
800 £ 500
uV/m
£
800 £ 500
uV/m
£
800 £ 500
uV/m
uV/m
uV/m
3
S/N RATIO MW
LW
dB ³ 35 ³ 45
dB
4
TOTAL HARMONIC DISTORTION
% £
1.5 £ 1.0
5 OVER LOAD DISTORTION 5mV 80% MOD
% £ 10 £ 5
6
FREQUENCY RESPONSE at -6dB MW
LW
Hz 100~2k 80~2.3k
Hz
7
SELECTIVITY 10KhZ/9KhZ MW
LW dB ³ 20 ³ 25
dB
8
AGC FIGURE OF MERIT INPUT 100mV
dB
³
40 ³ 45
9
IMAGE REJECTION MW = TP 3
LW = TP 3 dB ³ 30 ³ 35
dB
10
FREQUENCY RESPONSE AT
±
1.5dB
%
£
15 £ 10
% £ 15 £ 10
11
AUTO STOP LEVEL MW
LW
uV/m
800(
±
6dB) 800( ± 5dB)
uV/m
12
TUNED LEVEL MW
LW
uV/m
800(
±
6dB) 800( ± 5dB)
uV/m
13 OUTPUT LEVEL
mV
120
±
40
120 ± 30