There is provision for switching from frequency stepping to continuous sweeping to permit interoperation with older types of level tracer, e.g. K211, K2001, K2202 or P2011. The level oscillator can be set quasi-continuously to any wanted frequency within its operating range. To extend the battery service life a plug-in power supply is provided which when connected to the level oscillator switches off the internal battery. The input signal is fed to an automatically controlled attenuator and then rectified. The signal is converted to a logarithmic function and applied to a comparator which controls the attenuator.
Power is supplied from proprietary dry batteries.
The input and output jacks are located on the front end and right-hand side of the instrument respectively.