GENERAL
The FP42 is a 4-input, 2-output, compact, self-contained stereo
mixerfor applications in broadcasting, recording and sound rein-
forcement. The high-reliability FP42 integrates all the operating
featuresof a professional stereo mixer in a single unit—small and
lightweightenough for location use, but with the reliability of a stu-
dio console.
FEATURES
SWide, flat frequency response, lowdistortion, and high
output level
SReliableoperation under all temperature and humidity
conditions
SProtected against RFinterference and damage from input
overload and shorted outputs
SFourtransformer-coupled XLR inputs, each microphone-line
switchablewith low-cut filters and cuing function
SFull-separationpan pots with center detent on each input for
precise spatial positioning
SPhantompower for condenser microphone operation
SBuilt-intone oscillator permits level checking and line testing
SLeft-and right -channeltransformer-coupled XLR outputs,
withmicrophone -lineand mono-stereo switches
SParallel stereo headphone jacks (1/4-inch and mini)with
level control
SLeft and right mixbus jacks
SActive, feedback-typeinput gain controlsfor high -levelinput
signals withoutinput attenuators
SAdjustable-thresholdlimiter with left- and right-channel peak
indicators
SVUmeters with range switch and battery check function
SLeft-and right -channelmaster level controls and ganged
headphone level control
SPoweredby ac (120 or 240V—internally selectable) or
built-inbattery pack
SLowbattery drain provides up to 10 hours operation under
normalconditions
SNoiselessand automatic switchover to and from battery
power
SRugged,durable construction
SCompactand lightweight for field use and transporting
SRack-mountablewith accessory rack mount kit
SListed by UnderwritersLaboratories, Inc.;
listed by CanadianStandards Association as Certified
CONTROLS AND CONNECTIONS
Power Off/On Switch: applies power to the FP42 circuitry.
Channel Level/Cue Rotary Controls: adjust individual input
channelsignal levels. Each channel can be cued by pulling the con-
trolknob outward, rotating the knob to the desired level, and push-
ing the knob inwardto activate the channel.
Lo Cut Filter Slide Switches: reduce unwanted low-frequency
signals such as wind noise by 6 dBper octave at 150 Hz.
PanL--RRotary Controls: assign each input channel signal to the
left(L) or right (R) output channel, or equally to each output channel
(centerdetent).
MasterRotary Control: determines mixed output level at left (L)
and right (R) output connectors. The control is “clutched”: both
channellevels can be set simultaneously, or the left (inner knob) or
right(outer knob) channel can be set individually. The control also
setsthe tone oscillator level when the ToneOsc switch is turned on.
Mono/StereoSlide Switch: selects either monophonic output sig-
nals(both left and right output connectors carry the same signal) or
stereooperation (input channel signals are assigned to left or right
output channels depending on Pan control positions).
LimiterIn/Out Slide Switch: activates fast-acting, peak-respond-
inglimiter circuit to cut overload distortion during loud program in-
tervals without affecting normal program levels.
Peak/Limiter LEDS: indicate limiter operation withthe limiter in,
and indicate approaching program overload with the limiter out.
TheLEDs are activated by the shortest transient peak, but remain
on long enough to provide easy recognition.
Land R VU Meters: indicate 0 VU with a +4 dBm output (recom-
mendedfor normal use to provide approximately 14 dB headroom
fromoperating level to clipping level). Rear-panel VU Range +4/+8
slideswitch permits changing to 0 VU= +8 dBm. The VU meters are
litduring ac operation only; therefore, the illumination serves as a
visualalarm if the ac is interruptedand the unit has automatically
switchedto battery operation.
Batt Check Momentary Push-button Switch: operates in con-
junction with the left-channel VUmeter to indicate battery condi-
tion.With the Power switch onand the switch depressed, a new set
ofbatteries will give about a+2 VU indication. Battery condition is
goodif the reading is above 0 VU: a lower reading means that new
batteries are required for proper operation.
ToneOsc Off/On Slide Switch: provides a highly stable, low-dis-
tortion1-kilohertz tone for line tests and level checks. The tone sig-
nallevel is controlled by the Master Level control. The tone signal
appears on both the line and microphone outputs, aswell as the
Headphonesand Mix Bus connectors. The tone oscillator should
be switchedoff when not in use.
Headphones 1/4-inch Stereo Phone Jack and Miniature 3.5
mmStereo Phone Jack:permit monitoring mixer output through
moststereo headphones. The Headphones rotary control adjusts
Model FP42 User GuideStereo Microphone Mixer27A 8795 (Rev. 1)
ã2004, S hure I nc orporat ed PrintedinU.S.A.