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filter capacitors discharge. As well, even if the phantom power is
switched off, the LED will illuminate if voltage is being fed from an
external source. (i.e. when using a direct split in a remote recording
application.)
3. PHASE REVERSE The phase reverse switch (labeled
∅
∅
) reverses
the absolute polarity of the music signal at the input of the
preamplifier. The switch illuminates green and provides power for a
sealed gold contact relay located on the preamplifier circuit board.
This eliminates signal wiring to the front panel and switch contact
performance problems.
4. 20dB ATTENUATOR The 20dB attenuator switch (labeled -20)
attenuates the input signal 20dB. The switch illuminates amber when
engaged. Like the phase reverse switch, this switch controls a sealed
gold contact relay on the preamplifier circuit board. With the -20
switch engaged, the effective gain range becomes -2dB to 44dB.
5. PEAK INDICATOR The LED peak indicator, which monitors the
output signal, turns green at -14dB and switches to red at +16dB
(12dB before clipping in balanced mode and 6dB before clipping in
unbalanced mode). The threshold level for peak indication is
adjustable on each channel. See section V. Maintenance.
6. MEMO STRIP The Memo strip can be used with dry-erase or wet-
erase type markers. If using dry-erase markers, black is
recommended. Grease pencils are not recommended.
B. SETTING THE GAIN
1. Turn the gain control fully counter-clockwise and check that the +48V
phantom power is off. Connect the microphone and then turn on the
phantom power if required. When sending a signal to a tape recorder
that has fixed input levels, simply increase the gain until the optimum
recording level is reached. If the peak indicator flashes red
excessively with the gain control in the fully counterclockwise position,
engage the -20dB attenuator.
2. When sending a signal to a tape recorder with an input attenuator (i.e.
Record Level control on a DAT recorder) use the following procedure:
With the sound source present, turn the gain control clockwise until
the peak LED begins flashing red, then reduce the gain until the red
stops flashing. Since red indicates a peak level which is 12dB before
clipping (6dB in unbalanced mode) it is OK for it to come on
periodically during recording. If peak indicator flashes red excessively
with the gain control in the fully counterclockwise position, engage the
