6
6
5
7
5
7
4
8
4
8
3
9
3
9
2
10
2
10
1
11
1
11
1
2
MIC LINE
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 Controls 1- -4: At "0" position, mi-
crophone channel is removed from operation. Turning control
FP410
MASTER
6
6
5
7
5
7
5
4
8
4
8
4
3
9
3
9
3
2
10
2
10
2
1
1
11
1
11
3
4
PULL FOR 1 KHZ TONE
TAPE OUT
LINK
MIC LINE
OUT
IN
MODEL FP410
- -24 - -20 - -16 - -12 - -8 - -4
0
+4 +8 +12 +16
6
7
8
- -20 - -10 - -7 - -5 - -3 - -2
- -1
0
9
100%
10
11
BATTERY TEST
MANUAL AUDIO
MONITOR IN
PHANTOM
MIC LINE
OFF ON
4
3
FIGURE 1
clockwise 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 (
quency rolloff to reduce undesirable low--frequency signals
such as wind noise.
5. MASTER Rotary 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/VU Output 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 TEST Momentary 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/AUTO Slide 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.
2
PEAK
PHONES
+1 +2 +3
VU
LIMITER IN
PULL FOR MONITOR
MIC LINE
MIC LINE
2
1
) Slide Switches: Provide low--fre-
OFF ON
MIC LINE