For calibration, an individual transmit path is selected portions of the associated carrier-frequency transmit signal of which are coupled out (KN).

The audio interface includes a transmit path and a receive path.

The transmitter means (3) are connected to the antenna (5) by at least a first transmitting path (TX1), wherein a first DC decoupling capacitor (C1b) is switched into the first transmitting path (TX1).

The transmit path and receive path are electrically isolated from each other.

The front-end transceiver may also include a transmitter path.

Each transceiver has a transmit path, a receive path, a duplexer configured to interconnect the transmit and receive paths with the antenna element.

The system includes a transmitter unit (TX), a receiver unit (RX), and an optical transmission path interconnecting the transmitter and receiver units.

A receiving path (RX) branches off from the first transmitting path (TX1) to the receiver means (4).

Each antenna has its own transmission path components and receive path components.

The transmit path carries transmit signals from the multiple deskset phones (102a, 102b, 102c...) to the RAU (104).

The oxygen discharge (14) is fluidly coupled to the oxygen conduit (38) and the hydrogen discharge (12) is fluidly coupled to the hydrogen conduit (40).

The ADM interfaces can be checked by coupling the receiving path and the transmission path.

The transmit amplifier, for example, in the transmit path and the receive amplifier, for example, in the receive path tend to drift in their characteristics over time.

A supplied digital baseband transmit signal (SBB,i) is converted to a carrier-frequency transmit signal (SRF,i) in every transmit path (SP1-SP8).

Another aspect relates to adaptation of transmit subchannel gains.