Shure FP410 - Manual (Page 6)

6
SPECIFICATIONS
Measurement Conditions (unless otherwise specified): Line
voltage 120 Vac, 60 Hz (FP410E: 230 Vac, 50/60 Hz); full gain;
1 kHz, one channel activated; output terminations: Line 600
τ ,
Mic 150 τ , Tape 50 k τ , Phones 200 τ Ε tip--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 dB 46 dB 23 dB
Monitor — — 9 dB —
Inputs
Impedance
Input
Designed
for use with
Actual (In-
ternal)
Input Clip-
ping Level
Mic 19--600 τ 900 τ --15 dBV
Line  10 k τ 66 k τ To >+26
dBV
Monitor  1 k τ 25 k τ +21 dBV
Outputs
Impedance
Output
Designed
for use with
Actual (In-
ternal)
Output
Clipping
Level
Mic Any low--im-
pedance
mic input
0.5 τ --31 dBV (28
mV) min.
Tape >10 k τ 1 k τ --2 dBV (800
mV)
Head-
phones
8--200 τ ,
200 τ rec-
ommended
500 τ +6 dBV (2.0
V)
Line 600 τ 100 τ +19 dBm
(6.9 V) min.
Total Harmonic Distortion (controls centered [5], +4 dBm at
Line output)
 0.25%, 50 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 --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 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 τ series resistance, input switches
in Mic position only (internally switchable to 48 Vdc, 4.5 k τ
series resistance)