| 摘要 |
PURPOSE:To prevent enlargement of a device and to facilitate measurement at a laboratory level by selecting freely frequency of a picture pattern specified by a control circuit by means of a high frequency signal generator, and transmitting an output signal to plural channels of a CATV. CONSTITUTION:A television complex signal generator 1 transmits a television complex signal of the desired pattern to a mixer 6. An operator specifies the desired channel by a control circuit 8, and a control signal is outputted to a high frequency signal generator 5, which generates a carrier signal of the specified channel from an array of CATV frequency based on the control signal. The high frequency carrier signal is supplied to the mixer 6, mixed with an output of said generator 1, converted into a high frequency signal of the specified channel and transmitted to a coupler 9. A carrier signal except that of the specified channel from a plural-channel signal generator circuit 7 is coupled with the coupler 9 and outputted to a circuit. |
