BBK BX900U, Руководство по обслуживанию

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永 福 电 子 有 限 公 司
YUNG FU ELECTRONICS LTD
Model No CD003 Date:2013-1-17
Section: FM TUNER Page: 1 of 6
Measuring Items Condition Unit Normal Limit Test Data
1 2
3
Tuning Frequency Range Low End MHz 64 +/-0.5
High End MHz 108 +/-0.5
Intermediate Frequency MHz 10.7 +/-0.1
Max. Sensitivity 64MHz dB 20
90MHz dB 20
106MHz dB 20
-30dB Quieting S/N Sensitivity 64MHz dB 26
90MHz dB 26
106MHz dB 26
Dial Calibration 64MHz MHz 0.5
60MHz MHz 0.5
106MHz MHz 0.5
IF Rejection 90MHz dB 40 35
Image Rejection 106MHz dB 26 20
AM Rejection 90MHz dB 40 30
RF Overload Distortion:100dB 75KHz Dev
90MHz % 3 4
10%THD Output Power 75KHz Dev 90MHz W 8 7.8
Maximum o/p
75KHz Dev 60dB
W 8 7.8
Distortion at Max Volume 22.5KHz Dev
Distortion at Max Volume,75KHz Dev
90MHz % 10
90MHz % 25
-6dBAudio Fidelity Low Freq Hz 100 150
High Freq KHz 4.5 3.8
-3dB Limiting Sensitivity 90MHz dB 30 35
Distortion at Ref Output,75KHz Dev 90MHz % 1 3
S/N Ratio with 1mV 90MHz dB 50 40
Modulation Hum 90MHz dB 55 45
Noise Output (Hum and Noise)
Max Vol mV
Min Vol mV <3
Auto Tuning Stop(Seek) Sensitivity 64MHz dB 20 28
90MHz dB 20 28
106MHz dB 20 28
Fall Out Voltage(AC) 90MHz % <70
Fall Out Voltage(DC) 90MHz % <70
Fall Out Voltage 9VDC Clock Backup % -30
AFC Holding
–
3dB KHz
Stereo Separation: 1Mv75KhzDev 100HZ dB
1KHZ dB 28
10KHZ dB
Stereo indicator Sensitivity 90MHZ dB 24 28
Mono/Stereo Output Difference 90MHZ dB 1
L/R Channel Output Difference dB 3
Test Conditions Approved By: 程挺锋
1.Supply Voltage : AC 220-240V 50Hz
2.Standard Output : 50 Mw
3.Speaker impedance: 4 OHM
SPECIFICATIONS
1