Technics ST-9600 - Page 2

4 LOCATION OF CONTROLS
®
©
©®@
® )
G&G
G88
®
@
FM
STEREO
INDICATOR
@
BAND
SELECTOR/PINK
NOISE
(3000
FM
ANTENNA
TERMINALS
@ FM TUNING METER CHECK SWITCH @75QFM ANTENNA TERMINALS
@ FM/AM SIGNAL STRENGTH METER @ TUNING CONTROL (AM ANTENNA TERMINAL
@ POWER SWITCH @ AM ANTENNA COIL «AF OUTPUT TERMINALS
@ AF OUTPUT LEVEL CONTROL @ RECORDING OUTPUT TERMINALS @ LINE OUTPUT TERMINALS (TO PLAYBACK
@ MPX HI-BLEND SWITCH (TO INPUT TERMINALS OF TAPE DECK) | TERMINALS OF AMPLIFIER)
@® FM MUTING & SERVO TUNING @ PLAYBACK INPUT TERMINALS (TO @LINE INPUT TERMINALS (TO RECORDING
SWITCH OUTPUT TERMINALS OF TAPE DECK) OUTPUT TERMINALS OF AMPLIFIER)
® TAPE DECK RECORDING/PLAY- @ 4CH MPX OUTPUT TERMINAL @FM MULTIPATH OUTPUT TERMINALS
BACK SWITCH (3 750 COAXIAL FM ANTENNA SOCKET @ VOLTAGE SELECTOR SWITCH
(Except Set for Australia)
=
eS
FM
IF
AMPLIFIER
I.C.
FM RF CIRCUIT
AM CIRCUIT
DISCRIMINATOR
AMPLIFIER I.C.
PINK NOISE CIRCUIT
FM MUTING CIRCUIT
MUTING RELAY
POWER FUSES
AF AMPLIFIER I.C.
LOW PASS FILTER
AUTO HI-BLEND
CIRCUIT
FM MPX I.C.
m LOW-NOISE RECORDING AND PLAYBACK
When making an ordinary recording of an FM broadcast, the tuner output is transmitted to the amplifier, and the
signal taken from the recording terminals of the amplifier is recorded and played back. When this method is used,
any noise which is generated within the tuner, as well as FM noise, is recorded also. Then, during playback, the
.sound also includes the tape-noise component.
This unit, in order to reduce this noise component, includes special recording and playback circuitry. And, in
addition, the operation of one switch also makes it possible to record and playback in the usual way if desired.
What path the FM signal will follow to the tape deck for recording, playback and monitoring, depending upon the
setting of the recording/playback switch of this unit, is shown on the following page.
The frequency response of the FM signal which has been subjected to FM MPX is a high level, high-frequency signal.
FM noise is included in this signal, and tape noise will also be included in a signal which has passed through the tape
deck. Generally, because the higher the frequency, the higher the noise, the signal is recorded as it is after FM MPX,
and, by subjecting the playback signal to de-emphasis, the FM signal will assume a flat response and the noise level
can, atthe same time, be reduced. F
(Tape noise can be reduced by approximately 10 dB/10 kHz lower than when recording in the usual way.)
[2] ST-9600