Shure FP42 manual General, Controls and Connections, Features

Model FP42 User Guide Stereo Microphone Mixer

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

SWide, flat frequency response, low distortion, and high output level

SReliable operation under all temperature and humidity conditions

SProtected against RF interference and damage from input overload and shorted outputs

SFour transformer-coupled XLR inputs, each microphone-line switchable with low-cut filters and cuing function

SFull-separation pan pots with center detent on each input for precise spatial positioning

SPhantom power for condenser microphone operation

SBuilt-in tone oscillator permits level checking and line testing

SLeft- and right-channel transformer-coupled XLR outputs, with microphone-line and mono-stereo switches

SParallel stereo headphone jacks (1/4-inch and mini) with level control

SLeft and right mix bus jacks

SActive, feedback-type input gain controls for high-level input signals without input attenuators

SAdjustable-threshold limiter with left- and right-channel peak indicators

SVU meters with range switch and battery check function

SLeft- and right-channel master level controls and ganged headphone level control

SPowered by ac (120 or 240V—internally selectable) or built-in battery pack

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

SNoiseless and automatic switchover to and from battery power

SRugged, durable construction

SCompact and lightweight for field use and transporting S Rack-mountable with accessory rack mount kit

SListed 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

mmStereo Phone Jack: permit monitoring mixer output through most stereo headphones. The Headphones rotary control adjusts

￿2004, S	hure I nc orporat ed	Printed in U.S.A.
27A 8795	(Rev. 1)