During frequency hopping the net synchronisation is achieved by data exchange between all sets suitably equipped and forming part of the net. The writer believes that the hopping rate is about 2 per second , but it is not known if the hop pattern is orthogonal. Main control panel Left can be seen the main control panel for the whole system. The red lights on the top left are alarm enunciators for frequency lock, blowers, overloads etc. The centre panel provides operator control over audio routing.
Top right provides selection of antenna.
Other control deal with the radio power amplifiers and peg board frequency selection when using remote control. The system permits single frequency simplex working, split frequency simplex working, and split frequency duplex working. The cover which is just in view on the far left covers an audio and system patch field. The truck may be deployed as a long term communication station providing radio and telephone communications between the rear and forward units. In its long term role the two sixty foot masts would be demounted and set up in the field using the steel guy ropes supplied.