Now established as a leading supplier of transmission equipment for television and radio, Plisch began trading in 1955 and specialised initially in radio interference measuring equipment and TV measurement devices. It moved into TV transmission, and associated measurement units, soon afterwards. In 2008 the company moved away from its established TRISTAN range of transmission systems, which had been on the market for 15 years, and introduced its next generation of digital TV transmitters.

The new high-power products were based on the TDV (transmitter, digital video) range and were approved and ready for shipping in August 2008. Plisch now produces a variety of transmitters in the Series 3000 and 4000 ranges for terrestrial TV and radio based on international and European standards, including DVB-T/T2, DAB and DAB+, ISDB-T/TB and analogue. These include the T2V 3000 for DVB-T2 operations, which was used for the first tests of the format in Lower Saxony, Germany in September 2009. The TDA 3000 series is based on the latest LDMOS transistor technology and is designed for digital radio operating in DAB, DAB+ and DMB.

The SBT 3000 series operates on the Brazilian ISDBT/TB (Integrated Services Digital Broadcasting, Terrestrial) system and also uses LDMOS. Analogue transmission is still catered for in a dual-cast version that allows an easy transition to digital through the push of a button. Plisch also produces a range of broadcast equipment, including transport stream switches, monitoring receivers for DVB-T/T2, IP to ETI gateway and a precision GPS clock redundancy system.