Sherwood R-325 Service Manual page 5

a FM SECTION
Measuring methods in conformity with IEC standard 315.
Measurements conditions FM;
* Radio frequency: 98.1 MHz, Audio frequency: 1 kHz * Reference level: 1 mV on 75 ohms
* Deviation: MONO=+75 kHz, Stereo=+67.5 kHz+7.5 kHz (Korea/USA/Canada Version)
x Deviation: MONO=+ 40 kHz, Stereo= +40 kHz+7.5 kHz (Europe Version)
x Test point: TP1=90.1 MHz, TP2=98.1 MHz, TP3=106.1 MHz (Korea/USA/Canada Version)
x Test point: TP1=90 MHz, TP2 pe Version
87.5~ 108
200/200
100/50
Korea/USA/Canadal Bf <17.2 <14.2
dBf <17.2 <14.2
dBf <17.2 <= 14.2
Europe dBf 20.2 <17.2
dBf 20.2 <17.2
dBf $20.2 17.2
Step AUTO/Man.
2 |Usable Sensitivity
S/N=30 dB
3 |Full Limiting Sense Output= -3 dB | Korea/USA/Canada dBf < 15.2 <12.2
Europe $20.2 <17.2
|_4 |Auto Stop Level
Pts: BE] 31.2(5)
[31.2123]
Signal to Noise Ratio MONO Korea/USA/Canada dB >65
Europe dB >62
STEREO Korea/USA/Canada dB >60
dB
Total Harmonic Distortion MONO %
STEREO %
7 |50 dB Quieting Sensitivity Korea/USA/Canada dBf
dBf
46 dB Quieting Sensitivity Europe dBf
dBf < 4 8 . < 45.3
Frequency Response at +1.5 dB | téi'(tSsé*dYCOhKHKz =| 20/12.5 | 10/74
Channel Separation Korea/USA/Canada dB
Europe dB
Korea/USA/Canada
Europe
Korea/USA/Canada
Europe
dB
dB
dB
dB
10/|Spurious Response Korea/USA/Canada dB
ee
ee
eee
i
Image Rejection TP3 Korea/USA/Canada dB
dB
| dB
270 280
270 =80
247 252
$2.5 S2
nN
Capture ratio ace
Output Level MONO i cAn te oY
AS
15
ak 'at =
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