Abstract: A method for controlling gain of a line amplifier on a cable, the method comprising selecting an unused carrier frequency; transmitting a pulsed pilot signal on the unused carrier frequency into the cable; determining a pilot signal output strength by measuring signal strength of the pilot signal after amplification by the line amplifier; comparing the pilot signal output strength with a target signal strength to determine a difference; and adjusting the gain of the line amplifier corresponding to the difference.

Abstract: A method for controlling gain of a line amplifier on a cable, the method comprising selecting an unused carrier frequency; transmitting a pulsed pilot signal on the unused carrier frequency into the cable; determining a pilot signal output strength by measuring signal strength of the pilot signal after amplification by the line amplifier; comparing the pilot signal output strength with a target signal strength to determine a difference; and adjusting the gain of the line amplifier corresponding to the difference.

Abstract: An antenna system including: an input port configured to receive tracking mode signals, in two orthogonal polarizations, from a target; a tracking coupler, configured to receive the tracking mode signals from the input port, the tracking coupler including: a first pair of opposed slot couplers configured to extract tracking signals from the tracking mode signals in a first one of the orthogonal polarizations, and a second pair of opposed slot couplers configured to extract tracking signals from the tracking mode signals in a second one of the orthogonal polarizations; and a tracking combiner network configured to combine the extracted tracking signals from the pairs of opposed slot couplers to generate tracking output signals for use in controlling the antenna system to track the target.

Abstract: A deployable photonic link including a deployable length of optical fiber and an interface module fusion spliced to at least one end of the optical fiber so that the module is directly connected to the fiber. The interface module including at least one of: an input for receiving a first electrical signal including a first radio frequency (RF) signal component; and an output for outputting a second RF signal component. The interface module further including, respectively, at least one of: a device for receiving the first electrical signal from the input and for producing an optical signal modulated with the first RF signal component for transmission in the optical fiber; and a device for receiving a modulated optical signal and for producing therefrom the second RF signal component for output at the output. An interface module may also contain both the input and the output and the devices for receiving RF signals and for receiving modulated optical signals.

Abstract: An antenna system including: an input port configured to receive tracking mode signals, in two orthogonal polarisations, from a target; a tracking coupler, configured to receive the tracking mode signals from the input port, the tracking coupler including: a first pair of opposed slot couplers configured to extract tracking signals from the tracking mode signals in a first one of the orthogonal polarisations, and a second pair of opposed slot couplers configured to extract tracking signals from the tracking mode signals in a second one of the orthogonal polarisations; and a tracking combiner network configured to combine the extracted tracking signals from the pairs of opposed slot couplers to generate tracking output signals for use in controlling the antenna system to track the target.

Abstract: A deployable photonic link including a deployable length of optical fiber and an interface module fusion spliced to at least one end of the optical fiber so that the module is directly connected to the fiber. The interface module including at least one of: an input for receiving a first electrical signal including a first radio frequency (RF) signal component; and an output for outputting a second RF signal component. The interface module further including, respectively, at least one of: a device for receiving the first electrical signal from the input and for producing an optical signal modulated with the first RF signal component for transmission in the optical fiber; and a device for receiving a modulated optical signal and for producing therefrom the second RF signal component for output at the output. An interface module may also contain both the input and the output and the devices for receiving RF signals and for receiving modulated optical signals.