The DM0D3 performs automatic alignment and hence, provides an optimization of the DRM spectrum during transmitter operation. For this purpose, a maximum of three test voltages (RF return) are used. These voltages are captured from various test points in the transmitter RF signal path and routed via the distribution board where automatic switching between the three inputs is also initiated.
The assignment of the test signals to the inputs RFin 1, RFin 2 or RFin 3 and the selection of the input damping takes place in the DMOD3 operating menu

демпфирующий входной сигнал?

Заранее спасибо