Lectrosonics SRa Series Manuel d'utilisateur télécharger pdf (Page 24)

SRa5P and SRa Dual Receivers

LECTROSONICS, INC.

Troubleshooting

Symptom Possible Cause

INITIAL POWER ON

LCD display not active or lit Externalpowersupplydisconnectedorinadequate.

  Wrongpolaritypowersource.Theexternalpowerinputjackrequires

  POSITIVE(+)tobeonthecenterpin.Batterygetswarmanddoesn’t

work.

  Batterymaybelow.Tryfreshbatteries.

Version message shows DSP or COM This indicates an internal error. Please contact the factory for

assistance.

Display indicates CHECK FREQ ThisisawarningthatastrongRFsignalispresentthatisnot

centered on the channel, and the audio is likely to be distorted.

  Therearethreeprincipalcauses:

  1) Thetransmitterissettothewrongchannel,butclosetothe

   thecorrectchannel.Checkfrequencysettingoftransmitter.

  2) Aforeignsignaliscausingthecondition,suchasfromalocal

   TVstationorfromintermodulationfromanothertransmitter.

Retune the receiver and transmitter to a clear frequency.

  3) Thetransmittercarrierfrequencyisnotcorrect(rareoccurrence).

   Contactfactoryforrepair.

  Ifanyofthesesolutionsdon’tremovethewarningmessage,the

  transmitterorreceivermayneedrepair.

PILOT TONE SQUELCH

Pilot Tone indicator (P) present, but no sound (Check audio meter ﬁrst)

Audiooutputcablebadordisconnected.

  AudioOutputleveltoolow.Usethebuilt-intesttonetoverifylevels.

Pilot Tone Indicator (P) keeps ﬂashing when transmitter turned on

Pilot tone detection can take several seconds. Turn on the transmitter

  power(andtheaudioswitchonsomemodels)andwait3to5seconds

  forthe“P”toindicatesteadily.

Transmitter and receiver not on same frequency.

  Receivercompatibilitymodedoesnotmatchthetransmitterinuse.

  (SeeSELSelectionsfromMainWindow,COMPATWindow.)

Noise on audio and Pilot Tone Indicator is “b”

Thepilottonebypasshasbeenactivated.HoldSELandpressUP

  toreset(worksonlyfromtheMainWindow).

Pilot Tone Indicator not present but receiving audio

Receiverissettoacompatibilitymodethatdoesn’tusePilotTone.

  Checkthatreceivercompatibilitymodematchesthetransmitterinuse

  asanysufcientlystrongsignalcanunsquelchthereceiverinthis

  mode,compatibleornot.

NOTE:Inthe400Series,200Series,IFBModeandMode6compatibilitymodes,thePILOTindicatorontheLCDshows

asasolid“P”toindicatethattheaudiohasbeenturnedonatthetransmitter,andthattheaudiooutputonthereceiveris

enabled.Whenthe“P”ison,theaudioisenabled.Ifthe“P”isashingthepilottoneisnotdetectedandtheaudiowillbemuted

(squelched).

Intheothercompatibilitymodes,nopilottoneisusedandthe“P”isneverdisplayed.Audioispresentwheneverthe

receiverdetectsasufcientlystrongsignal.

Regardlessofthecompatibilitymode,activatingthe“pilottonebypass”causesalowercase“b”toappearontheLCD

mainwindowandforcingthesquelchtoopenanddeliveraudio.Whennomatchingtransmitteristurnedon,loudnoise

willbepresentatthereceiveroutput.

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Lectrosonics SRa Series Manuel d'utilisateur Page 24

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