Lectrosonics AM8 Operating Instructions And Owner's Manual page 13

8 Channel Automatic Matrix Mixer
Input Tone Control Tab
The Input Tone tab allows the low cut frequency and the high frequency cut or boost to be set for each of the 10 input
channels.
Low Cut - Sets the low cut corner frequency for each input channel. The low cut filter is a 6dB/octave (i.e. single
pole) filter. Frequency choices are 75Hz, 90Hz, 110Hz, 130Hz, 190Hz, 280Hz, 600Hz, and Flat.
Short Cut: A left click on the low cut box causes the frequency to be set to "Flat".
Hi Cut/Boost - Sets the high frequency cut or boost for each input channel. The inflection point of the high fre-
quency tone control is approximately 1kHz. Choices for cut/boost are -8dB, -6dB, -3dB, Flat, +3dB, +6dB, and +8dB.
Short Cut: A left click on the hi cut/boost box causes the cut/boost value to be set to "Flat".
Input/Output Crosspoint Matrix
Tab
The Input/Output Matrix tab sets
the input to output assignments
for the AM8/4.
Input/Output Crosspoint -
Allows the input/output crosspoint
gain to be set. Each of the first 4
rows of 11 crosspoint boxes
represent input connections which
may be set from inputs and
Expansion In LecNet port to
outputs 1-4. The last row repre-
sents the signals to send to the
Expansion Out LecNet port. To
set a crosspoint gain, simply click
on the crosspoint box at the
intersection of the desired input
and desired output. The
Crosspoint Gain frame below the
matrix will become active, and the
desired crosspoint gain may then
be selected.
Exp In is the signal from the dual 8 pin mini-DIN LecNet Expansion In connector on the rear panel of the AM8/4.
This signal would be used if another LecNet device, like a TH3 Telephone Hybrid, were connected to the AM8/4 via
the expansion cable. In this case, the TH3's receive signal would be present at the Exp In connector. The crosspoint
gains for Exp In to any active outputs would be set to the desired gain so that the participants in the local room could
hear the far-end participant. Another application might be the addition of 8 more inputs using an AM8. In this case,
the sum of all 8 AM8 channels would appear at the Exp In connector. This signal could then be distributed as
necessary to appropriate output mixes.
The Expansion Out frame selects the signals which will be routed to the LecNet Expansion In connector. Only two
crosspoint gains, 0dB and Off, are available when sending inputs to the Expansion In port.
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Rio Rancho, NM – USA