ELECTRONIC DISPLAYING SYSTEM

PROBLEM TO BE SOLVED: To measure a loss caused when a reciprocating radio frequency signal is transmitted, and display it on an electronic display device for this specific electronic display module by using an actually installed communication base station, including actually arranged individual antenna and electronic display module. SOLUTION: A pseudo-price changing command is transmitted to a specific electronic display module 10 from a ceiling-mounting antenna 20. When this pseudo-price changing command signal is received, the electronic display module 10 returns its reception confirming signal to the ceiling-mounting antenna 20. A communication base station observes intensity of the reception-confirming signal received from this specific electronic display module 10, and transmits a price to be displayed on the electronic display module 10 to a changing command on the basis of a value of intensity of a received communication signal. Therefore, an operator to perform a field service can evaluate an electronic display system without using a testing device, and can also easily evaluate intensity of a communication signal of the electronic display module 10.