| 摘要 |
<p>PURPOSE:To easily execute the test of frame synchronization recovery by generating asynchronization from a multiplex signal receiving equipment at first, alternately outputting errorless continuous frame signals and incorrect continuous frame signals generating no asynchronization and switching the number of signals. CONSTITUTION:Synchronously with frequency dividing pulses, n-1 incorrect frame signals and m errorless frame signals are alternately outputted. The multiplex signal receiving equipment to be a tested equipment is set up to an asynchronizing state during the period from the start of the input of n incorrect frame signals up to the end of the input of m errorless frame signals and then turned to a synchronization recovered state, which is continued until the input of n incorrect frame signals after raising the succeeding output from a monostable multiplexer circuit 13. Consequently, the OFF state of a lump can be checked after the ON time has passed, so that the recovery of frame synchronization can be checked.</p> |
