Fostex LM16 User Manual

28

Model LM16 [Mixer basics]

Clipping level

Clipping level

Optimum gain

Too high

Too low

It is important to set the [TRIM] con-

trol appropriately. Otherwise, the signal may
be distorted or noisy.

The [TRIM] control adjust the head amp gain
of each input signal. To get the optimum gain,
set this control appropriately so that the
[PEAK] indicator lights at the maximum in-
put level.

By adjusting this control appropriately, the
LM16 can accept a signal within -60dBu and
-12dBu for an XLR connector is connected,
while it can accept a signal within -40dBu and
+8dBu when a phone plug is connected.

When the [PHANTOM] switch is set

to ON, the corresponding [PHANTOM] indi-
cator on the control panel is illuminated.

When you turn on the phantom

power, make sure that the [TRIM] controls
on the corresponding mixer channels are set
fully left (minimum) or the LM16 is pow-
ered off.

Usually phantom power does not damage a
dynamic microphone, however, do not con-
nect an old ribbon microphone to an input
connector to which phantom power is sup-
plied.

INSERT

INSERT

INSERT

INSERT

INSERT

INSERT

INSERT

CONTROLLER

PHANTOM

POWER

PHANTOM

When you turn off phantom

power, the indicator is not immediately
turned off, however, phantom power is
immediately turned off.

INSERT

INSERT

INSERT

INSERT

INSERT

T

K

K

PHANTOM

POWER

The [TRIM] control the gain of the

head amplifier with a two-stage pre-amp and
there is a point where the gain is switched
(at approx. -35 dBu for XLR input, -15 dBu
for phone input). At this point, a noise may
be generated.

Each of mixer channels 1 through 16 provides
a combo type -- a combined XLR connector
and phone jack in one. You can connect a
microphone to the XLR connector or connect
a line signal to the phone jack. (The phone
jack can accept both balanced and unbal-
anced signals.)

You can adjust the input gain using the [TRIM]
control on each mixer channel strip.

48 V phantom power can be supplied to the
XLR input connectors. For most of condenser
microphones, the phantom power is required.

You can turn on or off phantom power using
the [PHANTOM] switches in eight channel
groups (1-8 and 9-16) using these switches.

On each of input channels 15 and 16, the
[SOURCE (INPUT/SUB IN)] select switch is
provided. When the switch is in the INPUT
( ) position, a signal from the [INPUT] con-
nector is selected. When the switch is in the
SUB IN ( ) position, a signal from the [SUB
IN] jacks (L for channel 15, R for channel
16) is selected (see page 34 for details).