18
Preamplifier Functions
8, 9, 10 Input Select Buttons or Keys
Use these buttons to select the corresponding rear panel input that is connect-
ed to a CAST (C-1, C-2), balanced (B-1, B-2), or single-ended (S-1,
S-2, S-3) analog source. The front panel display shows the selected input and
volume level.
11 Tape Button and LED, or Key
Use this button or key to select the tape input that is connected to an analog
tape source. The red tape LED illuminates when the tape input is selected. The
front panel display (3) shows:
TAPE
and the main volume level.
12 Mute Button and LED, or Key
Use this button or key to mute the preamplifier output. To unmute, press the
mute button again. The red mute LED illuminates when mute is selected.
To
customize mute operation see
Mute,
on page 39
The
M
Mu
utte
e
button is also used to engage the pink noise generator to aid in cali-
braing main and subwoofer outputs. See
C
Ca
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brra
attiin
ng
g M
Ma
aiin
n O
Ou
uttp
pu
utts
s a
an
nd
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su
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wo
oo
offe
err o
ou
uttp
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below.
Calibrating Main outputs and Subwoofer outputs
The Phantom preamplifier features an internal pink noise generator to help bal-
ance the main outputs and subwoofer outputs.
1.
Press and hold Mute button (12) on front panel until
PINK NOISE GENERATOR
appears in the front panel display (3). The mute button will blink continuously
while in this mode.
a
a..
Repeated presses of the Mute button (12) will cycle through the various
channel/channel combinations in the sequence listed below
ALL CHAN (000 OR 0dB)
MAIN (000 OR 0dB)
SUBWF (000 OR 0dB)
L MAIN (000 OR 0dB)
L SUBWF (000 OR 0dB)
R MAIN (000 OR 0dB)
R SUBWF (000 OR 0dB)
OFF (000 OR 0dB
)
b
b..
Pink noise will output from each channel/channel combination.
2.
Select a channel/channel combination to act as a reference. Usng a Sound
Pressure Level (SPL) Meter, record the SPL, in dB, of the reference
channel/channel combination.
continued
