Sherwood RX-772 User Manual download pdf (Page 4)

Measuring methods in confirmity with IEC standard 315

Measurements condition FM : Radio frequency = 98.0MHz(RDS), 98.1MHz(K)

Audio frequency = 1kHz Reference level = 1mV on ( 75ohms ) Filter = B.P.F at STEREO

Deviation : MONO = ±75kHz, Stereo = ±67.5kHz±7.5kHz

Test Point : TP 1 = 90.0MHz, TP 2 = 98.0MHz, TP 3 = 106.0MHz(RDS)

Test Point : TP 1 = 90.1MHz, TP 2 = 98.1MHz, TP 3 = 106.1MHz(K)

Power supply : 230V / 50Hz(RDS), 220V / 60Hz(K)

●

FM SECTION

No. UNIT NOMINAL L/R LIMIT L/R

1 TUNING RANGE LOW ~ HIGH MHz

STEP(RDS) AUTO/Man. kHz

(K) AUTO/Man. kHz

2 USABLE SENSITIVITY TP 1 dBµV

≤5 ≤12

S/N = 30dB TP 2 dBµV

≤5 ≤12

TP 3 dBµV

≤5 ≤12

3 AUTO STOP LEVEL dBµV 20±3 20+14/-10

4 S/N RATIO @1mV MONO dB

≥70 ≥65

IHF-A FILTER STEREO dB

≥65 ≥60

5 TOTAL HARMONIC DISTORTION MONO %

≤0.5 ≤1

STEREO %

≤0.8 ≤2

6 50dB QUIETING SENS. MONO dBµV

≤15 ≤25

STEREO dBµV

≤35 ≤45

7 CHANNEL SEPARATION 100Hz dB

≥35 ≥30

1kHz dB

≥35 ≥30

10kHz dB

≥30 ≥25

8 FREQUENCY RESPONSE AT ±3dB

1kHz=0dB 50㎲(RDS), 75㎲(K)

9 SPURIOUS RESPONSE dB

≥76 ≥60

10 IF REJECTION TP 1 dB

≥80 ≥70

11 IMAGE REJECTION TP 3 dB

≥46 ≥30

12 AM REJECTION RATIO AT AM 30% dB

≥60 ≥55

13 OUPUT LEVEL MONO TAPE REC OUT mV 600±150 600±180

100 / 100

Hz 40~14K 50~12.5K

TUNER SECTION

DESCRIPTION

87.5~108

50 / 50

1 2 3 4 5 6 7 8 9 ... 31 32

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Sherwood RX-772 User Manual Page 4

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