Internal Switches And Controls (Cont.); Powering The Fp33 Mixer; Battery Life - Shure FP33 User Manual

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INTERNAL SWITCHES AND CONTROLS (Cont.)

Note: Bold type indicates the Factory setting.
DIP SWITCH
1 LIM LINK
2 LIM RELEASE R
3 LIM RELEASE L
4 MON DEFEAT R
5 MON DEFEAT L
6 PRE-MAST SLATE
7 POST-MAST SLATE
8 SLATE TONE
9 METER LAMP
10 PRESENCE LEDs
11 12 V OR 48 V PHANTOM
12 MS MATRIX FOR
HEADPHONES

POWERING THE FP33 MIXER

The FP33 can be powered by a 12–30 Vdc external power
supply while preserving the life of the internal batteries.
External Power Supplied
11.4 Vdc to 30 Vdc
<11.4 Vdc

BATTERY LIFE

The FP33 is designed for low current consumption.
Under typical conditions (+4 dBm into 600 Ω in continuous
use and no phantom–powered microphones, meter illu-
mination, or headphones in use), and with two fresh 9 volt
alkaline batteries , the FP33 will operate for about eight
hours before the Power LED flashes. At this point, about 30
minutes of battery life remain. If more mixer features are
used, battery life will decrease accordingly (see table).
POSITION
ON Left and Right limiters act in tandem. If limiter thresholds are set differently, limiter action
is determined by the lower threshold setting.
OFF Left and Right limiters act independently.
SHORT Right limiter release time constant is 0.1 second. Use for speech.
LONG Right limiter release time constant is 1 second. Use for music.
SHORT Left limiter release time constant is 0.1 second. Use for speech.
LONG Left limiter release time constant is 1 second. Use for music.
OFF When front panel Monitor switch is activated, Monitor In signal is heard in Right head-
phone.
ON When front panel Monitor switch is activated, Monitor In signal is not heard in Right head-
phone. Mixer audio remains in Right headphone.
OFF When front panel Monitor switch is activated, Monitor In signal is heard in Left headphone.
When front panel Monitor switch is activated
ON
phone. Mixer audio remains in Left headphone.
ON Inserts slate tone and slate microphone into circuit before the Master gain control (pre–
master). Slate level is controlled by Master.
OFF Removes slate tone/slate microphone from pre-master cIrcuit.
ON Inserts slate tone and slate microphone into FP33 circuit after the Master gain control
(post-master). Slate level not is controlled by Master.
OFF Removes slate tone and slate microphone from FP33 post-master circuit.
ON Slate tone (400 Hz) sounds for one second when front panel slate button is pushed. Slate
microphone also activates.
OFF Slate tone does not sound when slate button is pushed. Slate microphone does activate.
TOGGLED Lamp turns on/off when front panel lamp switch is toggled. Automatic timed turnoff of lamp
will not occur.
TIMED Lamp turns on/off when front panel lamp switch is activated. If not manually switched off,
lamp will automatically turn off after 10 seconds to conserve battery life.
ON Input LEDs illuminate green to indicate signal presence and relative level.
OFF Input LEDs do not illuminate green. Input LEDs will still illuminate red to indicate 6 dB be-
fore clipping.
12V Provides 12 Vdc phantom power if selected for channel input.
48V Provides 48 Vdc phantom power if selected for channel input.
ON Inserts MS decoding matrix into headphone circuit. User can monitor in stereo while allow-
ing separate Mic and Side signals to pass through the FP33.
OFF Removes MS decoding matrix from headphone circuit.
Internal Batteries
OFF (200 µA current at 18 V)
ON (Full power for the FP33 is sup-
plied by the higher voltage source)
FUNCTION
,
Monitor In signal is not heard in Left head-
Mixer Operation
(A) Idle, no signal
(B) As in (A) with +4 dBm continuous
output
(C) As in (B) with three Shure SM81 mi-
crophones at 12 V phantom power
(D) As in (B) with three Shure SM81 mi-
crophones at 48 V phantom power
(E) As in (B) with 63 Ω headphones
driven moderately loud (Sony MDRV6)
(F) As in (B) with meter illumination
continuously on
*Until Power LED begins to flash, and allowing 30 minutes to replace
batteries.
Note: Momentary use of headphones or meter illumina-
tion will not appreciably affect battery life.
6
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Battery Battery
Current Life
(mA) (hours)*
41 9
46 7.8
50 7.5
57 6.0
50 6.9
63 5.5