Altec-lansing 3300A Instrukcja Użytkownika Pobierz pdf (Strona 5)

Operating Instructions for the Altec Lansing 3300A Series Mixing Consoles

2. EQ Controls: Equalization can

be more simply described as so

phisticated tone control. The

EQ circuits used in the 3300A

series have a substantial

amount of sound shaping

capability.

This wide range ceui be a bonus

when dealing with widely-

varying instrument signals, poor

acoustics or other problems. The

EQ should be used sparingly,

however, for the best results.

Too liberal use of the EQ can

cause phasing problems, add

noise, and use up a lot of ampli

fier power.

2A- HIGH EQ: The high EQ

circuit is a shelving type

filter at 10 kHz with a ±15

dB rzuige. It controls the

treble content of the input

signal Turning the control

counterclockwise decreases

the amount of treble,

clockwise increases it.

2B. MID EQ: The mid EQ cir

cuit is a peaking type filter

with a ±15 dB range. It

controls the midrange con

tent of the input signal.

Turning the control coun

terclockwise decreases the

amount of midrange, clock

wise increases it.

2C. MID Frequency: The mid

frequency circuit controls

the frequency range from

300 Hz to 5 kHz of the

MID EQ control. By vary

ing the FREQUENCY, dif

ferent tonal perspectives

can be created. The sweep-

able frequency gives much

more control flexibility.

2D. LOWEQ: The low EQ cir

cuit is a shelving type filter

at 100 Hz with a ±15 dB

range. It controls the bass

content of the input signal.

Turning the control coun

terclockwise decreases the

amount of bass, clockwise

increases it.

8. MONITOR Send: The monitor

send control sets the level of

that input signal in the monitor

mix. It is independent of all

input channel controls except

the TRIM control. It is not

affected by the channel EQ

controls or slide fader. Thus, it

is independent of, zmd not

affected by, changes in the main

or house mix.

4. AJJX Sends: Ilie AUX 1 send

control sets the level of that

signal in the AUX 1 mix and is

{x>st-fader, which means that it

is affected by the gain setting of

the fader. The AUX 1 send may

also be used as a mono send for

recording.

The AUX 2 send control sets the

level of that input signal in the

AUX 2 mix and is switchable

PRE or POST fader. In the PRE

position, it serves as another

MONITOR OUT, and in the

POST position, another

EFFECTS OUT.

5. PAN Control: Short for "pan

oramic potentiometer", this con

trol allows the channel’s input

signal to be placed within the

stereo image by assigning more

or less of the signal to the left or

right su/jointfilesconvert/1697082/bgroup controls. Turn

ing the panpot to the left of

center moves the apparent

source toward the left channel.

Turning the panpot to the right

of center moves the apparent

source towzird the right channel.

Centering the control makes the

apparent source centered be

tween the channels. If all inputs

are panned center, the result is

mono.

Some users p>an all the instru

ments to one side and the vocals

to the other and use the sub

group controls to valance them.

6. PFL: PFL(pre-fader listen)

allows the open : to preview

any pre-fader sij, individually

or in combinaLi- through the

headphone out . To activate

the PFL simply ' >press the ap

propriate switcl: The status

indicator will . iit indicating

which pre-fader signals are be

ing monitored. hen the PFL

circuit is engag ' by depressing

a PFL switch, ^ th the right

meter and the headphone circuit

will monitor the audio level of

the selected cha;:ael(s).

In the normal position (all PFL

switches off), tile right meter

monitors the METER switched

bus, and the headphone circuit

monitors the out put of the SUB

L and SUB outputs. The

audio level of ,.he headphone

jack is controlled by the

PHONES conlrri.

7. Channel PEA^ LED: The

channel PEAK IjED monitors

the input channel circuit for

clipping or overload (both before

and after the EQ section). If it

lights, the sign;:, is bordering on

distortion. 'Ihis will be heard in

the output as aarsh, blaring

sound on voiame peaks. This

might be caused by excessive

boost in he channel

equalization controls, or a TRIM

control setting that is too high

for the input signal Generally,

readjusting the TRIM control

will cure '.is undesired

condition.

8. Channel Fader: The slide

fader controls the output level of

the channel as it is fed to the

su/jointfilesconvert/1697082/bgroups. Tl.;: control should

be normally set around the "0"

mark (nomiiia. level). At this

point, the signal level is high

enough to K.eep noise from

creeping in and low enough to

insure plenty of headroom and

ALTEC LANSING* CORPORATION • a Mark IV Company

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