| 摘要 |
In operation of an electronic display system in accordance with the present invention, a pseudo-price change command is transmitted by a base communications station to an individual electronic display module (10) and the strength of the acknowledgement signal returned by the individual electronic display module is observed and temporarily recorded. The base communications station then transmits a command to change the electronic display (12) on that particular electronic display module (10) to display a digital value indicative of the communication signal strength received by the base communications station. <IMAGE> |
