User Guide Stereo Microphone Mixer FP42

GENERAL
The FP42 is a 4-input, 2-output, compact, self-contained stereo
mixer for applications in broadcasting, recording and sound rein-
forcement. The high-reliability FP42 integrates all the operating
features of a professional stereo mixer in a single unit—small and
lightweight enough for location use, but with the reliability of a stu -
dio console.
FEATURES
S Wide, flat frequency response, low distortion, and high
output level
S Reliable operation under all temperature and humidity
conditions
S Protected against RF interference and damage from input
overload and shorted outputs
S Four transformer-coupled XLR inputs, each microphone -line
switchable with low-cut filters and cuing function
S Full-separation pan pots with center detent on each input for
precise spatial positioning
S Phantom power for condenser microphone operation
S Built-in tone oscillator permits level checking and line testing
S Left- and right-channel transformer-coupled XLR outputs,
with microphone-line and mono-stereo s witches
S Parallel stereo headphone jacks (1/4-inch and mini) with
level control
S Left and right mix bus jacks
S Active, feedback-type input gain controls for high-level input
signals without input attenuators
S Adjustable-threshold limiter with left - and right-channel peak
indicators
S VU meters with range switch and battery check function
S Left- and right-channel master level controls and ganged
headphone level c ontrol
S Powered by ac (120 or 240V—internally selectable) or
built-in battery pack
S Low battery drain provides up to 10 hours operation under
normal conditions
S Noiseless and automatic switchover to and from battery
power
S Rugged, durable construction
S Compact and lightweight for field use and transporting
S Rack-mountable with accessory rack mount kit
S Listed by Underwriters Laboratories, Inc.;
listed by Canadian Standards Association as Certified
CONTROLS AND CONNECTIONS
Power Off/On Switch: applies power to the FP42 circuitry.
Channel Level/Cue Rotary Controls: adjust individual input
channel signal levels. Each channel can becued by pulling the con-
trol knob outward, rotating the knob to the desired level, and push-
ing the knob inward to activate the channel.
Lo Cut Filter Slide Switches: reduce unwanted low-frequency
signals such as wind noise by 6 dB per octave at 150 Hz.
Pan L--R Rotary Controls: assign each input channel signal to the
left (L) or right (R) output channel, or equally to each output channel
(center detent).
Master Rotary Control: determines mixed output level at left (L)
and right (R) output connectors. The control is “clutched”: both
channel levels can be set simultaneously, or the left (inner knob) or
right (outer knob) channel can be set individually. The control also
sets the tone oscillator level when the Tone Osc switch is turned on.
Mono/Stereo Slide Switch: selects either monophonic output sig-
nals (both left and right output connectors carry the same signal) or
stereo operation (input channel signals are assigned to left or right
output channels depending on Pan control positions).
Limiter In/Out Slide Switch: activates fast-acting, peak-respond-
ing limiter circuit to cut overload distortion during loud program in-
tervals without affecting normal program levels.
Peak/Limiter LEDS: indicate limiter operation with the limiter in,
and indicate approaching program overload with the limiter out.
The LEDs are activated by the shortest transient peak, but remain
on long enough to provide easy recognition.
L and R VU Meters: indicate 0 VU with a +4 dBm output (recom-
mended for normal use to provide approximately 14 dB headroom
from operating level to clipping level). Rear-panel VU Range +4/+8
slide switch permits changing to 0 VU = +8 dBm. The VU meters are
lit during ac operation only; therefore, the illumination serves as a
visual alarm if the ac is interrupted and the unit has automatically
switched to battery operation.
Batt Check Momentary Push-button Switch: operates in con-
junction with the left-channel VU meter to indicate battery condi-
tion. With the Power switch on and the switch depressed, a new set
of batteries will give about a +2 VU indication. Battery condition is
good if the reading is above 0 VU: a lower reading means that new
batteries are required for proper operation.
Tone Osc Off/On Slide Switch: provides a highly stable, low-dis-
tortion 1-kilohertz tone for line tests and level checks. The tone sig-
nal level is controlled by the Master Level control. The tone signal
appears on both the line and microphone outputs, as well as the
Headphones and Mix Bus connectors. The tone oscillator should
be switched off when not in use.
Headphones 1/4-inch Stereo Phone Jack and Miniature 3.5
mm Stereo Phone Jack: permit monitoring mixer output through
most stereo headphones. The Headphones rotary control adjusts
Model FP42 User Guide
Stereo Microphone Mixer
27A 8795 (Rev. 1)
ã2004, S hure I nc orporat ed
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