products ATEX headsets which offer hearing protection


ATEX-approved CT-ClipCom/ Ex, which is designed as an intrinsically safe device in accordance with European standards EN 60079-0:2006 and EN 60079-11:2007. Corresponding to


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range of audio accessories from CeoTronics in Germany includes the


the high protection class II 2 G Ex ib IIC T4, this headset covers approximately 98 per cent of ATEX scenarios, the manufacturer claims. T e ATEX certifi cation applies to both versions of CT-ClipCom


– CT-ClipCom Earmike (with an ear microphone) and CT- ClipCom Boommike (with a fl exible swan neck with an electret microphone). T e Boommike version has a light, robust Flexboom which keeps its shape and does not bounce back when repositioned. Both products come as monaural versions (for one ear), but can also be supplied as binaural communication systems, with speakers for both ears.


CT-ClipCom Boommike, by CeoTronics: it can be used with all common digital radios


Multifunctional remote speaker-microphone


lso from CeoTronics is this universal remote unit for two-way radios, which includes ports for additional audio accessories as well as an internal speaker- microphone. The large PTT on the


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front occupies almost half of the surface, allowing easy operation with thick gloves, with the elbow or even under clothes. Two soft-key buttons can be assigned as required – for example, as volume control


and mute buttons for the integrated loudspeaker, for switching between TMO and DMO mode (TETRA trunking and direct mode) or for emergency calling (with protective ring). A bi-colour LED gives visual feedback. The unit is powered from the radio. Certifi ed IP65 (dust and


hose-proof) according to EN 60529, the CT-MultiCom offers good environmental protection even in its standard version. But it can also be ordered in an ATEX version with protection class II 2 G Ex ib IIC T4 (94/9/ EG).


 www.ceotronics.com


The CT-MultiCom speaker-mic from


CeoTronics: its large PTT surface allows easy operation


with elbow or gloved hands


Breathing apparatus In addition, the CT-ClipCom Earmike has been EC type- approved for hearing protection (PPE) in accordance with EN 352-2: 2002. T is, CeoTronics


believes, will please users who until now have been obliged to wear heavy, sweaty earmuff s. Connected to a two-way radio, the CT-ClipCom can be plugged directly into the ear and the wearer’s hearing is protected. When used in conjunction


with breathing apparatus, CT-ClipCom off ers improved communication because the speech is picked up in the ear channel while the disturbing operating noise of the breathing apparatus is not transmitted. CT-ClipCom headsets are


available with suitable connectors for all major digital and analogue two-way radio models.


 www.ceotronics.com


Duplexer by Eleading


Technologies, from a range of modules for TETRA radio sites


Duplexers and cavity fi lters T 38


he 84000/85000 series of duplexers and cavity fi lters from Eleading


Technologies covers TETRA bands between 300 MHz and 470 MHz. Typical of the duplexers is model 84305A, which covers the receive band 455–460 MHz and transmit band 465–470 MHz. Insertion loss is quoted as 1·2dB maximum over the full operating temperature range of –40 to +70˚C and third-order intermodulation products are less than –135 dBc when measured


with 2 × 43 dBm tones at 1 MHz spacing. Isolation between bands is 80 dB min. Rejection is 80 dB minimum and return loss is better than 20 dB over the full operating temperature range. Physical dimensions are 223 × 168 × 88 mm maximum over the tuning screws. T ese devices complement a range of TETRA-specifi c isolators and power amplifi ers manufactured by Eleading Technologies.


 www.ghz-marketing.com TE TRA TODAY Issue 5 2011


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