Shure FP42 - Manual

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

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Wide, flat frequency response, low distortion, and high

output level

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Reliable operation under all temperature and humidity

conditions

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Protected against RF interference and damage from input

overload and shorted outputs

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Four transformer-coupled XLR inputs, each microphone-line

switchable with low-cut filters and cuing function

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Full-separation pan pots with center detent on each input for

precise spatial positioning

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Phantom power for condenser microphone operation

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Built-in tone oscillator permits level checking and line testing

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Left- and right-channel transformer-coupled XLR outputs,

with microphone-line and mono-stereo switches

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Parallel stereo headphone jacks (1/4-inch and mini) with

level control

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Left and right mix bus jacks

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Active, feedback-type input gain controls for high-level input

signals without input attenuators

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Adjustable-threshold limiter with left- and right-channel peak

indicators

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VU meters with range switch and battery check function

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Left- and right-channel master level controls and ganged

headphone level control

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Powered by ac (120 or 240V—internally selectable) or

built-in battery pack

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Low battery drain provides up to 10 hours operation under
normal conditions

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Noiseless and automatic switchover to and from battery

power

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Rugged, durable construction

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Compact and lightweight for field use and transporting

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Rack-mountable with accessory rack mount kit

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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 be cued 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

27A8795 (CD)

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2003, Shure Incorporated

Printed in U.S.A.