Metrology radio communications system

A frequency hopping radio communications system comprising a measurement station having a first clock and an interface station having a second clock, wherein:

• the measurement station is configured to transmit measurement information arising from a measurement event, the measurement information including timing information that relates the measurement event to the first clock;
• the interface station is configured to receive the measurement information from the measurement station and to generate a measurement output including timing information defined relative to the second clock;
• one of the first and second clocks is designated as a master clock and a periodic clock adjustment of the other of the first and second clocks is performed to maintain synchronisation with the designated master clock;
• the timing information of the measurement output generated by the interface station takes into account any of the periodic clock adjustments that are applied between occurrence of the measurement event and the generation of the measurement output;
• the measurement information transmitted by the measurement station is timestamped relative to a time defined by the first clock;
• and
• the measurement station transmits information to the interface station using a series of frames and the measurement information is timestamped to define a time relative to an edge of a transmitted frame.

A frequency hopping radio communications system, comprising a measurement station having a first clock and an interface station having a second clock, wherein:

• the measurement station is configured to transmit measurement information arising from a measurement event, the measurement information including timing information that relates the measurement event to the first clock;
• the interface station is configured to receive the measurement information from the measurement station and to generate a measurement output including timing information defined relative to the second clock;
• one of the first and second clocks is designated as a master clock and a periodic clock adjustment of the other of the first and second clocks is performed to maintain synchronisation with the designated master clock;
• the timing information of the measurement output generated by the interface station takes into account any of the periodic clock adjustments that are applied between occurrence of the measurement event and the generation of the measurement output;
• and
• the measurement event comprises an asynchronous measurement event.