3
shielded cables). Adjust Mic/Line switches as required for
incoming signal level.
3. If phantom–powered condenser microphones are used,
turn on the FP410E’s 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 FP410E 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 FP410E 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 the
first mixer and the LINK OUT jack of
the
last mixer unconnected. NOTE: Jacks are for linking
only, not for audio inputs or outputs.
7. If headphone monitoring of the FP410E 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 to
Operation section).
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.
Operation
1. Turn on the Power switch and set the Manual/Auto switch to
Manual.
2. Set the Peak/VU meter to Peak or VU as desired.
3. The 1 kHz internal tone oscillator can be used to help align
the following equipment levels (master mixer, amplifier, re-
corder, etc.) to the output level of the FP410E. The tone os-
cillator is activated by pulling the Master gain control out-
ward. Its level at the FP410E output is set by the Master gain
control. After setting equipment levels, turn off the tone os-
cillator by pushing the Master gain control inward.
4. “Talk” the microphone connected to the FP410E Channel 1
input, and slowly raise the Channel 1 Gain control to the
point where the green LED flickers regularly with normal
speech, and the red LED only occasionally with louder
speech peaks.
5. Set the other FP410E channel gains in the same manner.
6. Set the Flat (—)/Low–Cut (/ ) switches adjacent to each
Gain control as required. The low–cut position reduces pick-
up of low–frequency room noise.
7. Set the Manual/Auto switch to Auto. In about one second,
unused microphone inputs will turn off and the level of an in-
dividual talker’s voice will rise above the background noise
and reverberation to become clearer and more intelligible.
8. Adjust the FP410E Master Gain control for the desired out-
put level, as indicated by the Peak or VU meter, or by the fol-
lowing equipment.
9. The FP410E is now ready for operation.
MODIFIABLE FUNCTIONS
The FP410E is ready for automatic or manual operation as
supplied. Additional versatility is provided by easily accessible
switches visible when the battery compartment is removed.
Note that the switches are all in the “up” position as supplied;
changes are made by moving the switch or switches down-
ward. The switch positions are illustrated by a label below the
battery compartment (see Figure 2).
VU Meter
(Switch No. 1). Change the VU meter, supplied cal-
ibrated for +4 dBm = 0 VU, to +8 dBm = 0 VU by moving this
switch downward. (This switch does not affect calibration of
the LED output level meter in the Peak position.)
Limiter Threshold
(Switch Nos. 2, 3). Change the limiter
threshold, the output level at which limiter action begins, from
the factory–set +16 dBm to 8 dBm, +4 dBm or 0 dBm
output level by moving these switches as shown in Figure 2.
Off–Attenuation
(Switch No. 4). Change the off–attenua-
tion from 13 dB to infinite (
∞
) by moving this switch downward.
With the 13 dB setting, an unused microphone is 13 dB lower in
level than when it is activated. With the
∞
setting, an unused
microphone is completely off.
Hold Time
(Switch No. 5). Change the hold time, the duration
of time an activated microphone (which is not locked on) re-
mains on after the talker stops talking, from 0.4 seconds to 1.0
second by moving this switch downward.
Last Mic Lock–on Defeat
(Switch No. 6). The last mic
lock–on feature keeps the most recently activated microphone
open until a newly activated microphone takes its place. It can
be defeated so that all microphones automatically turn off after
the hold time by moving this switch downward.
Phantom Power
(Switch No. 7). Phantom power for con-
denser microphones, normally 14 V, can be changed to 48 V
by moving this switch downward. CAUTION: Make certain the
METER
0 VU
LIMITER
THRESHOLD
OFF-
ATTEN
LAST MIC
LOCK-ON
PHANTOM
POWER
+4
+16
13 dB
IN
0.4 SEC
+14 V
+8
OUT
1.0 SEC
+48 V
+8
+4
0
HOLD
TIME
MODIFIABLE FUNCTION SWITCHES
FIGURE 2
