ENGLISHENGLISH
the VU meter, refer to the Internal Modifiable Func-DIP Switches and Limiter Threshold Adjustment for
tions section.instructions.
11. Input Gain Control: Adjusts the gain level of each in-16. Left/Right Channel Output Level Meters: 0 VU is
put channel. Rotating the knob counterclockwise re-preset at a +4 dBm output level. This may be recali-
duces the gain and raises the input clipping point. Usebrated for each meter by an internal trim potentiometer.
a low control setting to handle ?hotter? input signalsSee the VU Meter Adjustment paragraph for instruc-
without distortion. With the FP33 input circuit, micro-tions.
phones with a ?hot? output may be used without an in-Note: Mechanical meters are used because LCD me-
line pad (attenuator). For best performance, adjustters do not operate properly in cold weather; fluores-
each Input Gain control so the associated Input Levelcent meters drain batteries too quickly; and LED me-
LED illuminates red only on the loudest signal peaks.ters are difficult to see in sunlight.
12. Input Low-Cut Filter Switch: Provides low-frequen-17. Monitor Input Switch: In the center position, this
cy roll-off to reduce wind noise and rumble. When us-
switch sends the post-master audio to the headphone
ing the filter, the frequency response is down 6 dB atoutput. In the left (locking ) or right (momentary) posi-
150 Hz. The roll-off slope is 6 dB per octave.tion, it sends the audio signal from the Monitor In jack
13. Master Gain?Right Channel Output: The outerto the headphone output.
ring controls the Right channel output gain. The dual-
18. Headphone Gain Control (Inner Knob): Adjusts the
clutched control lets the Right and Left outputs be ad-headphone volume level.
justed individually. Set it to ?0 dB? for unity gain.
14. Master Gain?Left Channel Output: The inner knobWARNING: The headphone circuit is capable of
controls the Left channel output gain. The dual-producing high volume levels that can damage the
user?s hearing. Make sure the headphone volume
clutched control lets the Right and Left outputs be ad-
justed individually. Set it to ?0 dB? for unity gain.setting is low (fully CCW) before putting on the
Note: The 1 kHz tone oscillator level is set by theheadphones.
Master Level controls. To calibrate other devices,19. Headphone Monitor Mode Switch (Outer Ring):
adjust the Master Level controls for a 0 VU re-The user can monitor the FP33 output as: Stereo; Right
sponse.channel only; Mono (Left + Right); or Left channel only.
15. Output Peak Limiter Switch: Activates two fast-act-Note: This switch also affects the Monitor In signal.
ing, peak-responding limiters, one for each outputWhen using a stereo MS microphone, such as the
channel. Limiters help prevent overload distortionShure VP88, the user may wish to pass the mic signal
from unexpected loud input signals. The limiter activa-through the FP33 as separate Mid and Side signals,
tion is indicated by the Output Peak/Limiter LEDs,yet hear decoded stereo in the headphones. Using the
which illuminate green.Headphone MS Matrix, the user can monitor the FP33
The limiters may be changed to: operate indepen-output as: Discrete (Mid and Side); Side only, Stereo
dently; be linked as a stereo pair; activate at thresh-(decoded MS), or Mono (Mid only). Refer to the Inter-
olds from 0 dBm to +15 dBm; and have release timenal DIP Switch table for instructions on activating the
constants of 0.1 second or 1 second. See the InternalHeadphone MS Matrix.
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ACEC
