AlphaMix
remote
control
setup
procedure.
the attenuator. These LEDs are calibrated to reflect audio levels of -20dBu (green),
6dBu (yellow) and 0dBu (red). To properly set the input gain trim, the red LED should
just flash at the transient peaks of signal. For dialog, the green LED should remain lit
with occasional yellow presence at the peaks. Continuous red indicators are
representative of potential signal overload. These levels also indicate the output gain
level of the individual balanced outputs on the input side panel.
Just to the right of each gain control are the AlphaMix
retracting pan pots
.
These are equipped with center detents to confirm mid placement in the
summing output bus. As with any pan pots; the signal may be positioned as
desired within the stereo field. Once placement has been determined the
pots can be recessed to keep the front panel free from obstruction while
mixing.
The
PFL
button in the lower left corner is yet another feature uncommon to mixers in
this class. PFL allows the operator to monitor the signal prior to the Channel Gain. This
capability is critical in determining the quality of the incoming signal. It may also be
utilized when setting the Gain Trim level from an auditory context.
In the bottom right corner of each channel is the
active low cut/high pass filter
. This
three-position switch allows a 12dB per octave attenuation of all frequencies below the
preset frequency. The preset frequencies are at 80Hz (left position), 20Hz (center
position) and 140Hz (right position). If the 80Hz low cut is selected, there will be an
initial -3dB roll off at 80Hz. All frequencies below 80Hz will be rolled off at 12dB per
octave. The same applies to the 140Hz low cut application. When set at the middle or
“20Hz” position frequencies below 20Hz are rolled off with the AlphaMix operating at full
frequency response.
Centered below the Channel Gain
6
is the
Remote Control indicator LED
. This will
illuminate in the event that the remote control on the boom is employed indicating its
use. It is important to note that the use of the remote control overrides the channel gain
input trim pot. To properly utilize the remote control the following steps should be
observed:
1. Set mixer up as normal with appropriate microphone
power and channel fader off.
2. Attach remote control to the boom pole with strap.
3. Plug remote connector into mixer.
7
4. Set slide fader to middle position and reopen channel
fader until meters register a normal signal.
5. Sliding knob toward the end of the cable lowers the
volume.
6. Sliding knob away from the cable end increases the
volume.
6
Remote control featured on channel 1 only.
7
See “Input Side Panel” photo page (#)
