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CONTROL FUNCTIONS AND CONNECTIONS
A
A-Phase Control Switch - This toggle switch allows the user
to invert the system phasing easily and safely. When the switch
is in the 0° position the SFD-2 will put out a normal or non-
inverted signal in relation to the signal being received from the
source. When the switch is in the 180° position the SFD-2 will
put out an inverted version of the signal as compared to that
being received from the source. This feature offers a convenient
method of correcting source material which was recorded "out
of absolute phase" or to compensate for a component in your
system, such as a preamplifier, power amplifier or signal con-
nection, which inverts phase.
B -Power Indicator LED - This LED will light when the
Power Switch (G) is in the OPERATE position and the SFD-2
is receiving power. This LED will flash on and off for approxi-
mately 45 seconds after the Power Switch (G) is turned to the
OPERATE position. During this time, the two vacuum tubes are
warming up and the analogue outputs are muted. Once the
warmup period is past, the LED stops blinking and glows
steadily, the output stage relays are unmuted and the SFD-2 is
ready to play.
C -Signal Locking Indicator LED - This LED will light when
an operational digital source is selected.
NOTE: Depending on the source or transport being used in
conjunction with the SFD-2, it may be necessary to have the
source unit in the "P L A Y" mode and the SFD-2 receiving the
digital transmission before the LED will light.
B
C
D
E
F
D-D e-Emphasis Indicator LED - This LED will light when a
pre-emphasized digital track is being played. The correct
de-emphasis equalization is switched in automatically by the
SFD-2 circuitry, and no user adjustments are necessary.
E - Input Signal Selector Switch - This 3 position toggle
switch selects between the three digital inputs located on the
back of the SFD-2: AT&T/ST (Glass Fibre) Optical, RCA
Coaxial and AES/EBU XLR. A connection to all 3 inputs may
be made from 3 separate sources. The Signal Locking
Indicator LED (C) will light when the source is activated in
conjunction with the input chosen by this switch.
F - Sampling Frequency Indicator LEDs - One of these
LEDs will light, indicating the frequency of the digital input sig-
nal. The sampling frequencies are 32K, 44K and 48K.
G -Power Switch - This toggle switch, when switched to the
OPERATE position, allows the SFD-2 to receive full power,
rendering the SFD-2 operational as indicated by the Power
Indicator LED (B). When the switch is in the STANDBY position,
the SFD-2 is not receiving full power and is not operational.
G
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