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6
SPECIFICATIONS
Measurement Conditions (unless otherwise specified): Line
voltage120Vac,60Hz(FP410E: 230Vac,50/60Hz); fullgain;
1 kHz,one channelactivated; outputterminations:Line 600τ,
Mic 150
τ, Tape 50 kτ, Phones 200τΕtip--sleeve and ring--
sleeve); Auto mode
Frequency Response (controls centered)
25 Hz to 20 kHz, +0.5,--2 dB (any input to any output)
Voltage Gain
Output
Input Line Mic
Head-
phone
Tape
Low --im-
pedance
mic
(150
τ)
93 dB 43 dB 97 dB 74 dB
Line 42 dB -- 8 d B 46 dB 23 dB
Monitor — — 9dB —
Inputs
Impedance
Input
Designed
for use with
Actual (In-
ternal)
Input Clip-
ping Level
Mic
19--600τ 900τ
--15 dBV
Line
10 kτ 66 kτ
To >+26
dBV
Monitor
1kτ 25 kτ
+21 dBV
Outputs
Impedance
Output
Designed
for use with
Actual (In-
ternal)
Output
Clipping
Level
Mic Any low--im-
pedance
mic input
0.5τ
--31 dBV (28
mV) min .
Tape
>10 kτ 1kτ
--2 dBV (800
mV)
Head-
phones
8--200τ,
200
τ rec-
ommended
500τ
+6 dBV (2.0
V)
Line
600τ 100τ
+19 dBm
(6.9 V) min.
Total Harmonic Distortion (controls centered [5], +4 dBm at
Line output)
0.25%,50Hzto20kHz
Hum and Noise
Equivalent Input Noise --128.5 dBV...................
Equivalent Input Hum and Noise --128.5 dBV..........
Output Noise (300 Hz to 20 kHz; channelcontrols full coun-
terclockwise)
Master full counterclockwise --88 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 Rejec tion
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, c auses no
damage.Microphone inputsare notdamaged by signalsup
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 Lightswhenlimitingisoccurring..............
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)
DecayTime:180msectimeconstant(83msec/LEDstep)
Tone Oscillator
1kHz,
10%, THD <0.5%
Phantom Power
14 Vdc open--circuit, 1k
τ series resistance, inputswitches
in Mic position only (internally switchable to 48 Vdc, 4.5 k
τ
series resistance)