ETS SM1 Series User manual

ETS Inc
211 Conchas SE Albuquerque, NM 87123
Phone [phone] Fax [phone] E-mail: [email protected]
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ETS Inc
211 Conchas SE Albuquerque, NM 87123
Phone [phone] Fax [phone] E-mail: [email protected]
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LINELevelMicrophoneshavebuiltinpreampsandrequirepowertooperateasshowninFigure1.In
somecasesit’seasiertouseaninterfacebox(SMEA‐1,SMA1‐LPEA,SM2,etc.)topoweraSM1
microphoneandconnecttoIPCameraorDVR.
Figure1ashowdifferenttypesof3.5mmjacksandaRCAjackthatareusedtoconnecttoIPCameras.
TheAvigilonConnectionsshowsthe3.5mmTRRSjackwhichmeansTip,Ring1,Ring2andSleeve.Ifjust
usingamicrophonethenTipisusedforAudioINandRing2isusedforground.With2wayAudiouse
samemicrophoneconnectionsanduseSleeveforAudioOutandRing2forground.Note:groundsare
sharedbetweenaudioinandaudiooutthroughRing2.
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Figure2isanexampleofdifferenttypesoflabelsonterminalblockconnectionsonIPCamerasfor
microphoneLineINandMICINinputs.The“someexamples”aresomeofthetypesoflabelweseenon
IPCameraswithterminalblocks.
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AMICLevelMicrophonehasnopreampandispoweredbytheIPCamera.Inmostcases,MICLevel
Microphoneshaveastereo3.5mmmaleconnectorwiththeaudiosignalonTIPandRINGwhicharetied
togetherandSLEEVEisground.SomeIPCamerashavemonojacksformonauralMICInputs.CheckIP
camerasspecificationsheetoruser’smanualtoverifyinputismonauralinput.
Figure3showshowtoconnectanETSML1seriesmicrophonetoanIPCamera.

ETS Inc
211 Conchas SE Albuquerque, NM 87123
Phone [phone] Fax [phone] E-mail: [email protected]





ETS Inc
211 Conchas SE Albuquerque, NM 87123
Phone [phone] Fax [phone] E-mail: [email protected]



Problem: No audio from microphone or speaker with ETS interface box and IP camera
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Possible cause: If your camera utilizes a 3.5mm MONO audio input or audio output the
provided STEREO 3.3mm patch cords cause the audio signal to be shorted. To
correct it, you must cut a wire inside the SMEA-1 or SMA1-LP-XX interface box. The
photos below show how the 3.5MM jacks are wired inside the interface. Remove the
four screws and cover of the interface. Then, locate the jack(s) and cut wire as shown
on the 3.5mm jack(s) below and your system should work. If you have any further
issues or questions, please call technical support at 505-888-3923
M-F 9:50 Mountain time.
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3.5mm jack wire uncut 3.5mm jack wire cut
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