Intercom dAV-TRX from mk-messtechnik GmbH

The dAV-TRX-DSP 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. Fields of application are the acoustic monitoring of A/V – devices, engines or radios and the use as an hands free intercom system for absorber lined chambers. The device can stay in the chamber during the tests.


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

Technical Data

Mobile microphone: internal, mono
Table top microphone: external plugable, mono
Frequency range: approx. 60 Hz to 15 kHz (-3 dB)
adjustable volume of speaker
Talking modes: one way transmission mode, hands free mode
Power supply: 5 NiMH cells with 4 Ah; >8h; 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
Weight table top: approx. 1300 g

Optical Fiber

Connector / type: FSMA, duplex multimode 62.5/125 μm


  • external battery packs / power supply
  • ST or FC fiber connectors
  • shielded power supply for wall mount use inside ALC


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