| 摘要 |
PROBLEM TO BE SOLVED: To provide a reference signal disconnection warning circuit which is made smaller in size and lighter in weight in a method for distributing a reference signal providing a highly stable frequency. SOLUTION: This warning circuit reliably transmits a reference signal disconnection warning signal from one reference signal disconnection warning circuit 202 according to the load state of a reference signal branching circuit 201 when even one spot is in an open state in a plurality of reference signal cables by combining a signal cable 203 with 1/4 wavelength of a reference signal and a reference signal cable 6 with the integer multiple length of 1/2 wavelength. |
