Sennheiser Conferette C 2-1 Bedienungsanleitung Seite 5

The usercan selectone of two modes:
1. MIC
In this modethe "Conferette C 2-)" operatespurelyas an
audloamplifler. T he infrared receiversectionis swifched
off.
2. IR + MIC
In thls mode,audiosignalscan be received as weilas the
infrared signals.
Thisdescriptlonhascoveredthe basicfunctlonlngof the
unit Thefollowingrelatesto operatingthe unit:
The User'sGuideis subdivided into two sectlons.Thefirst
sectiondescnbesadjustments whichare onlyto be
made by hearing-aidspecialists. T hesecondsectlon
contalnsthe adjustmentsrequiredto operatethe
unit
A. Basic
adjustment
Disassembly
Pullthe rearpart of the caseto the rear,awayfrom the
unit Notoolsare requiredfor this operation,because the
frant and rear partsof the caseare only Interconnected
by a snap-flt.
Balanceadjustment
Withthis adjustment, t he volumerelations hip between
the two earphonesis adaptedto the reducedhearing
capabilityof the user,whIch ISnot usuallythe samefor
both ears.Thecontral is designated PBin Fig-2. The
settingrange is ::t 30 dB-
PU
Flg.2
PE PB
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Microphoneactivationthresholdtor intra red
mode
Exworksthe basicadjustmentISsuchthat the automatlc
actlvatloncircuit responds to the soundpressurepradu-
ced by a personspeaklngat a normalspeechlevel,and
at a dlstanceof approximately ) m from the listener. T he
respondthresholdof the automaticcircurt, w ith respect
to distance, c an be variedwithin limitsby meansof PE.
Adjustment ot compensation circuit
The "ConferetteC 2-)" containsa compensatlon circuit
whIch preventsthe voiceof the personweanngthe C 2-)
from beingampllfiedat a unnaturallyhighvolume.The
degreeof compensation maybe adJusted with potentio-
meter PU(fig.2) accordingto the mainapplicatlon.
Adjustment: Potentiometer f ully anticlockwise:
for application as hearingamplifier.
Potentiometer f ully clockwise:
if C 2-) is exclusively usedfor hearingand
speechpractice.
B. Operating the unit
1. Insertthe rechargeable batteryplug@Intothe unit
Observe the Instructlons for useon the red label.
2. Selectthe modewith switch(iJ "0" position:unit is
switchedoff. "MIC"position:microphones switchedon,
infrared receiversectionswitchedoff. "IR+ MIC"
position:infrared receiversectionis switchedon and
mlcrophones are switchedon viathresholdsetting.
3. Placethe earpieces in the earsas shownIn Fig.l.
4. AdjustcontralCD for the desIredvalue.If only hissing
noiseis heardwhenthe Infraredmodehas beenselec-
ted ("IR+ MIC"), t he infraredtransmitteris not yet in
operation.
5. Forinfrared reception("IR+ MIC")lens@)mustpoint
in the directionof the infraredtransmitter.Wearthe
unit in sucha way that the lensISalwaysdirected
towardsthe transmitter,i.e.the televisionset,and so
that It is not coveredby your handor clothing.
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