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Sony ST-S320 Service Manual

Fm stereo /fm-am tuner

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AEP Model
UK Model
Tuner
Circuit system
FM tuner
Frequency range
87.5 —- 108 MHz.
Antenna terminals
75 ohms unbalanced
Intermediate frequency
10.7 MHz
Sensitivity (at 46 dB quieting)
FM stereo, FM/AM superheterodyne tuner
Quartz-locked PLL digital synthesizer system
18.0 dBf, 2.2 wV (mono)
40.0 dBf, 24.5 uw (stereo)
Signal-to-noise ratio (at 40 kHz deviation)
74 dB (mono)
70 dB (stereo)
Harmonic distortion
.
mono
wide
stereo
mono
narrow
stereo
iM distortion
.
mono
wide
stereo
mono
narrow
stereo
Separation
50 dB (at 1 kHz)
0.04%
0.05%
0.06%
0.08%
0.04%
0.05%
0.06%
0.08%
Frequency response
40 Hz- 12.5 kHz +0.5 dB
Selectivity
(at 400 kHz)
80 dB (wide)
90 dB (narrow)
(at 300 kHz)
45 dB (wide)
70 dB (narrow)
SPECIFICATIONS
Capture ratio
IF response ratio
1.0dB
AM suppression ratio 65 dB
Image response ratio 70 dB
70 dB
Spurious response ratio
Muting threshold
80 dB
30 dBf
Automatic tuning threshold
Output
AM tuner
Frequency range
Antenna
30 dBf
410 mV, 4.7 kohms (at 40 kHz deviation)
Except Italian model:
MW:
531 - 1,602 kHz
LW: 153 - 279 kHz
Italian model:
MW:
522 - 1,611 KHz
LW: 144 - 288 kHz
AM loop antenna
External antenna terminal
Intermediate frequency
450 kHz
Usable sensitivity (when AM loop antenna is used)
Signal-to-noise ratio
Harmonic distortion
Selectivity
300 «V/m (999 kHz)
1 mV/m (216 kHz)
54 dB (50 mV/m) (999 kHz)
50 dB (50 mV/m) (216 kHz)
0.3% (50 mV/m, 400 Hz)
32 dB
— Continued on page 2 —
FM STEREO /FM-AM TUNER
ON Y.

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