6
Inputs
Impedance
Input
Designed
for use with
Actual (In-
ternal)
Input Clip-
ping Level
Mic
19–600
Ω
900
Ω
–15 dBV
Line
≤
10 k
Ω
66 k
Ω
To > +26
dBV
Monitor
≤
1 k
Ω
25 k
Ω
+21 dBV
Outputs
Impedance
Output
Designed
for use with
Actual (In-
ternal)
Output
Clipping
Level
Mic
Any low–
impedance
mic input
0.5
Ω
–31 dBV
(28 mV)
min.
Tape
>10 k
Ω
1 k
Ω
–2 dBV
(800 mV)
Head-
phones
8–200
Ω
,
200
Ω
rec-
ommended
500
Ω
+6 dBV
(2.0 V)
Line
600
Ω
100
Ω
+19 dBm
(6.9 V) min.
Total Harmonic Distortion (controls centered [5], +18 dBm at
Line output)
<0.5%, 25 Hz to 20 kHz
Hum and Noise
Equivalent Input Noise
–128.5 dBV
. . . . . . . . . . . . . . . . . . .
Equivalent Input Hum and Noise
–128.5 dBV
. . . . . . . . . . .
Output Noise (300 Hz to 20 kHz; channel controls full coun-
terclockwise))
Master full counterclockwise
–82 dBV
. . . . . . . . . . . . . . .
Master full clockwise
–71 dBV
. . . . . . . . . . . . . . . . . . . . . .
Output Hum and Noise (20 Hz to 20 kHz; channel controls
full counterclockwise))
Master full counterclockwise
–74 dBV
. . . . . . . . . . . . . . .
Master full clockwise
–70 dBV
. . . . . . . . . . . . . . . . . . . . . .
Common Mode Rejection
65 dB minimum with input of –20 dBV at 100 Hz
Polarity
Pin 2 of balanced inputs and outputs are in phase with tip
connections of unbalanced inputs and outputs
Input Channel Activation
Attack Time
4 msec
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hold Time
0.4 sec (switchable to 1.0 sec)
. . . . . . . . . . . . .
Decay Time
0.5 sec
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Off–Attenuation
13 dB, fixed (switchable to
∞
)(single mixer; attenuation in-
creases as additional mixers are linked)
Overload and Shorting Protection
Shorting outputs, even for prolonged periods, causes no
damage. Microphone inputs are not damaged by signals up
to 3 V; Line and Monitor inputs by signals up to 20 V
Low–Cut Filters
6 dB/octave rolloff below 170 Hz
Limiter
Threshold
+16 dBm (switchable to +8, +4, 0 dBm)
. . . . . .
Attack Time
3 msec
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Recovery Time
350 msec
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Indicator
Lights when limiting is occurring
. . . . . . . . . . . . . .
Meter
VU Meter Calibration: 0 VU = +4 dBm (switchable to +8
dBm)
Peak Meter:
Rise Time: 2.0 msec time constant (0.9 msec/LED step)
Decay Time: 180 msec time constant (83 msec/LED step)
Tone Oscillator
1 kHz,
±
10%, THD < 0.5%
Phantom Power
14 Vdc open–circuit, 1 k
Ω
series resistance, input switches
in Mic position only (internally switchable to 48 Vdc, 4.5 k
Ω
series resistance)
Operating Voltage
AC Operation: 230 Vac rated nominal, 160 to 264 Vac fully
operational , 50/60 Hz, 8 W
DC Operation: 18 Vdc nominal at 25 mA typical no–signal,
33 mA typical at 0 VU (+4 dBm) output with 600
Ω
load; 6
Vdc minimum; battery life approximately 12 hours with alka-
line batteries at +4 dBm output in continuous use at room
temperature; two 9–volt batteries (type NEDA 1604A)
Temperature Range
Operating
–18
°
to 57
°
C (0
°
to 135
°
F )
. . . . . . . . . . . . .
Storage
–29
°
to 71
°
C (–20
°
to 160
°
F)
. . . . . . . . . . . . . . .
Overall Dimensions
44.5 mm H x 368 mm W x 210 mm D (1
3
/
4
x 14
1
/
2
x 8
1
/
4
in-
ches)(not including feet)
Net Weight
2.27 kg (5 lb)
Certifications
Approved for safety by VDE under DIN VDE 0860/05.89
harmonized with CENELEC HD 195 S6.
Statement of Conformity
This certifies that the Automatic Microphone Mixer,
FP410E, meets the specifications and regulations embo-
died in vfg 243/1992. The Zentralamt für Zulassungen Im
Fernmeldewesen has been notified that this device has
been marketed and has been provided the right to verify the
device or system for compliance with the specifications.
