High frequency apparatus and method for controlling high frequency apparatus

A method for controlling a high frequency apparatus including:

• a master control device;
• a plurality of slave devices, each slave device having a serial interface;
• and
• a control device for controlling whether the slave devices are operable to receive data signals from the master control device,
• the method for controlling the high frequency apparatus comprising:
• transmitting a data signal from the master control device to the control device;
• transmitting control signals from the control device to the plurality of slave devices based on the data signal, the control signals controlling whether the slave devices are operable to receive data signals from the master control device;
• placing the plurality of slave devices into an operable or inoperable state in accordance with the control signal;
• and
• transmitting data signals from the master control device to the plurality of slave devices.