Measuring methods in confirmity with IEC standard 315
Measurements condition FM : Ref. frequency = ( 98.1 MHz), Audio frequency = 1kHz
Reference level = 1 mV on (75ohms, 300ohms) Deviation :
Filter = B.P.F at STEREO and MONO
Test Point : TP1 = 90.1 MHz, TP2 = 98.1 MHz, TP3 = 106.1 MHz (50kHz STEP)
MOD:40 kHz(Mono)/40 kHz±7.5 kHz (STEREO)
9. FM SECTION
NO UNIT NOMINAL LIMIT
1 TUNING COVER RANGE LOW ~ HIGH MHz
STEP AUTO/MANUAL kHz
2 USABLE SENSITIVITY TP 1 dBu
12
15
S/N = 30
TP 2 dBu
12
15
TP 3 dBu
12
15
3 AUTO STOP LEVEL dBu 25±6 25±8
4 S/N RATIO MONO dBu
55
50
IHF "A" STEREO dBu
50
45
5T.H.D
MONO 1, 1kHz
ポ
0.7
1.2
STEREO 1, 1kHz
ポ
1.0
1.5
6 OVER LOAD DISTORTION (120dBu,75kHz) MONO dB
2
3
7 STEREO SEPARATION
250
ภ
dBu
30
25
(MAIN 53.5%, PILOT 10%) dBu
30
25
EXT 19kHz FILTER
6.3
dBu
20
15
8 FREQUENCY RESPONSE (50us, -3dB) TP 2 Hz 60~8k 70~7k
9 IF REJECTION TP 1 dB
75
70
10 IMAGE REJECTION TP 3 dB
75
70
11 AM SUPRESSION (at AM 30% 1kHz) dB
40
35
12 OUPUT LEVEL(MONO) TP 2
mV rms
280±50 280±100
DESCRIPTION
87.5~108
50/50(200/200 Brasil)
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