| 摘要 |
Data display apparatus for displaying data at locations remote from a host computer, in which requests for data to be displayed are transmitted from a hand-held display unit (22) to the host computer via a UHF radio link and data is transmitted from the host computer to the hand-held unit in response to such requests. The host computer is provided with an expansion card having radio modem means for connection to a conventional UHF radio unit. The display unit (22) includes an LCD display (24) and input keys (32, 36), and a radio modem also adapted for connection to a conventional UHF radio (28). The system provides different modes of data transmission, having differing levels of redundancy in the transmitted data, and is particularly intended for use in the offshore oil industry. <IMAGE> |
