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MODEL FP410
FIGURE 1
1 2 3456
7
8
9
10
11 1 2 3456
7
8
9
10
11 1 2 3456
7
8
9
10
11 4 3 2
LINK
FP410
TAPE OUT
MIC LINE MIC LINE MIC LINE MIC LINE MIC LINE MIC LINEPHANTOM
OFF ON
OUT IN
MASTER
PULL FOR 1 KHZ TONEBATTERY TEST MANUAL AUDIO LIMITER IN
PULL FOR MONITOROFF ON PEAK
VU
100%
MONITOR IN
432 1PHONES
11 2 3456
7
8
9
10
111 2 3456
7
8
9
10
11-- 2 0 -- 1 0 -- 7 -- 5 -- 3 -- 2 -- 1 0 + 1 + 2 + 3 -- 2 4 -- 2 0 -- 1 6 -- 1 2 -- 8 -- 4 0 + 4 + 8 + 1 2 + 1 6
Selectable Off --Attenuation control for seamless operation
Automatic gain adjustment as additional microphones are
activated
Defeatable Last Mic Lock --On circuit keeps at least one mi-
crophone on at all times-maintains acoustic ambiance and
prevents confusing background sound changes
Wide, flat frequency response and low distortion up +18
dBm output
Linking capability for systems containing over 25 mixers
and over 100 microphones
LED indication of microphone channel mix levels, output
level, and limiter action
Automatic muting prevents annoying thumps and loud-
speaker damage when unit is turned on and off
Transformer --balanced inputs and outputs switchable to
line -- or microphone --level
Separate monitor input and tape output (aux --level) jacks
Front --panel headphone monitor jacks with level control
Front --panel auto --disable switch for manual operation
Operates from ac mains voltage or two 9 V batteries
Switchable 14 V and 48 V phantom powering for condenser
microphones
Underwriters Laboratories Listed and Canadian Standards
Association listed as Certified (FP410 only)
CONTROLS, CONNECTORS, INDICATORS
(See Figure 1)
1. Microphone Channel Gain Controls1--4: At 0 position, mi-
crophone channel is removed from operation. Turning controlclockwise activates microphone channel and allows adjust-
ment of microphone level.
2. Input Normal Green LED: Should flicker with normal speech
levels.
3. Input High Red LED: Should flicker only on loud speech
peaks.
4. Flat (
)/Low--Cut ( ) Slide Switches: Provide low--fre-
quency rolloff to reduce undesirable low--frequency signals
such as wind noise.
5.MASTERRotary Control: Determines the level of the com-
bined input signals at Mic/Line, Tape and Phones outputs.
PULL FOR 1 kHz TONE position activates 1 kHz tone oscilla-
tor (tone level is determined by Master control setting). Oscilla-
tor signal appears at all outputs. When oscillator is not in use,
knob should be pushed in.
6.PEAK/VUOutput Level Meter: Meter function is selected by
adjacent PEAK/VU slide switch. In PEAK switch position, me-
ter indicates peak signal levels. In VU position, it indicates av-
erage signal levels, simulating a true VU meter.
7.BATTERY TESTMomentary Slide Switch: Operates in con-
junction with PEAK/VU Meter to indicate battery condi-
tion.With POWER switch on and switch in momentary--on po-
sition, new set of batteries lights all green LEDs. Number of
green LEDs lit indicates approximate battery life remaining
when alkaline batteries are used. NOTE:POWER LED begins
flashing when total battery supply voltage drops to 10 Vdc (one
green LED lit).
8.MANUAL/AUTOSlide Switch: Selects manual or automatic
microphone operating mode. In MANUAL position, unit oper-
ates as a conventional microphone mixer. In AUTO position,
unused microphones automatically turn off.
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9.LIMITER INSlide Switch: Activates fast--acting, peak--res-
ponding limiter circuit to cut overload distortion during loud
program intervals without affecting normal program levels.
The red limiter LED indicates limiting action.
10.PHONES
1/4--inch and 3.5 mm Phone Jacks: Permit moni-
toring mixer output through most stereo or mono headphones.
PULL FOR MONITOR switch applies signal from rear--panel
MON IN 3.5 mm phone jack to headphones amplifier. When
switch is activated, mixer output signal does not appear in
headphones output. PHONES rotary control determines
headphone level in either case.
11 .POWERSlide Switch: Applies ac or battery power to mixer
circuitry. Adjacent green LED indicates power--on status and,
in battery operation, flashes when total battery voltage drops
to 10 Vdc.
12.100 -- 120 VAC, 50/60 Hz 8W3--Pin Power Connector: For
connection to 100 to 120 Vac, 50/60 Hz power outlets (230 Vac
in the FP410E).
13.OUTPUT3--Pin Male XLR Connectors: For connection to
one or two amplifiers, recorders or other mixers. Output signal
levels are individually switchable to Line level or low--impe-
dance Mic level by adjacent individual MIC/LINE slide
switches. Both jacks provide the same signal information but
are electrically isolated.
14.TA P E O U T3.5 mm Phone Jack: Provides output signal to
feed unbalanced aux--level inputs of most tape recorders and
amplifiers.
15.LINK IN/OUT8--Pin miniature DIN Jacks: Using link
cables, these jacks permit virtually unlimited number of FP410
mixers to be stacked to achieve additional input capacity.
Jacks carry audio signals, MaxBus and Last Mic Lock--On in-
formation.
16.MON IN3.5 mm Phone Jack: Sends external Aux or Line--
level source to headphones amplifier without interrupting other
mixer functions. Jack is activated by pulling front--panel PULL
FOR MONITOR knob outward.
17.PHANTOM ON/OFFSlide Switch: Controls application of
14 Vdc phantom power for condenser microphones to all in-
puts. With switch on and INPUT MIC/LINE switches in MIC po-
sition, +14 Vdc is applied to pins 2 and 3 of each input XLR con-
nector. NOTE: Phantom power can be internally set to 48 Vdc
(seeModifiable Functionssection). When using other than
Shure condenser microphones, verify that voltage and source
resistance requirements are compatible (seeSpecifications).
18.INPUT 1 -- 4Female 3--Pin XLR Connectors: Permit con-
nection to balanced, low--impedance microphones or line--le-
vel sources. Adjacent MIC/LINE slide switches adjust inputs to
match source levels.
19. Battery Compartment: Accepts two 9--volt batteries for re-
mote operation or as automatic backup in the event of ac pow-
er failure.
INSTALLATION AND OPERATION
Mixer Installation
Install the FP410 as follows. If the unit is to be placed on a
horizontal surface, attach the four supplied bumpers to the cor-
ners of the chassis bottom to prevent marring the surface.
If the FP410 is to be rack--mounted in a standard 483 mm
(19--inch) audio equipment rack, remove the two Phillips headscrews from each FP410 side panel, place the rack ears in
position at the sides (rack--mount holes facing forward), and
secure the ears with the previously removed Phillips head
screws. NOTE: The rack ears are asymmetrical; thewiderear
should be on your right (as you face the front panel) to permit
access to the battery compartment while the FP410 is in the
audio equipment rack. Install the rack--mounted FP410 in the
equipment rack and secure it with the four supplied rack--
mount screws.
Make electrical connections as follows.
1. For battery operation, compress the release latches of the
battery drawer with thumb and forefinger, and withdraw the
drawer from the compartment. Observing battery polarity
markings, insert two fresh 9--volt batteries in the drawer
slots. With the Power switch on, slide the Battery Test switch
to the right to determine battery condition. IMPORTANT:
Battery operating life is reduced when microphones are
phantom--powered-especially by 48 Vdc phantom power-
ing. For ac operation, connect the power cord to a 100 to 120
Vac, 50/60 Hz source (FP410E: Connect to a 230 Vac, 50/60
Hz source).
2. Connect the microphones and/or line--level signal sources
to the Mic Input connectors (use conventional 2--conductor
shielded cables). Adjust Mic/Line switches as required for
incoming signal level.
3. If phantom--powered condenser microphones are used,
turn on the FP410s Phantom Power switch. NOTE: With
condenser microphones other than Shure, verify that volt-
age and source resistance requirements are compatible.
4. Connect one or both of the FP410 Outputs to the following
mixers, amplifiers or recorders. Make certain each Output
Mic/Line switch is in the proper position for the desired out-
put levels.
5. If an unbalanced aux--level output is needed, connect it to
the Tape Out jack.
6. If additional FP410 mixers are to be linked to increase the
number of microphone inputs, connect them by means of
the Link In and Link Out jacks. Connect the LINK OUT of the
first mixer to the LINK IN of the next mixer, and so on. Leave
the LINK IN jack of thefirstmixer and the LINK OUT jack of
thelastmixer unconnected. NOTE: Jacks are for linking
only, not for audio inputs or outputs.
7. If headphone monitoring of the FP410 mixed signal is re-
quired, connect mono or stereo headphones to one of the
front--panel Phone jacks (
1/4--inch or 3.5 mm). Adjust the
Phone control knob for the desired loudness (after setting
the microphone Channel and Master Gain controls accord-
ing toOperationsection).
8. To monitor an external signal source, connect it to the rear--
panel Mon In jack and pull the Phones control knob outward.
Adjust the Phones control and/or the external source level
control for the desired loudness.
