Intercom dAV-TRX from mk-messtechnik GmbH

The dAV-TRX system is used for the bidirectional optical transmission of voices during EMC tests (half duplex intercom). One transceiver is equipped with built-in batteries for mobile use (inside ALC), the second one is powered with an external power supply. Fileds of application are the acoustic (and optional optical) monitoring of A/V – devices, engines or radios and the use as an intercom system for absorber lined chambers. The device can stay in the chamber during the tests.


Assembly diagram for the intercom system dAV-TRX from mk-messtechnik GmbH

Technical Data

Mobile microphone: internal, mono; volume controlled
Table top microphone: external plugable, mono; volume controlled
Frequency range: approx. 60 Hz to 15 kHz (-3 dB)
gain of microphone and volume of speaker separately adjustable
Talking modes: push to talk, constantly on (one side), off
Power supply: 5 NiMH cells with 4 Ah; >20h; 5-poled charching / DC connector
Case dimensions: mobile: 150 mm x 100 mm x 100 mm; aluminum case
table top: approx. 250 mm x 200 mm x 100 mm (w/o gooseneck mic)
Weight: approx. 800 g

Optical Fiber

Connector / type: FSMA / Duplex-Multimode LWL 62,5/125 μm


  • external battery packs / power supply
  • ST or FC fiber connectors
  • horn speaker and shielded power supply for wall mount use inside ALC
  • head phone setup with full duplex connection (integrated speaker / mic omitted)


If you have any further questions about this or another product then please do not hesitate to contact us via e-mail sales(at)