| 摘要 |
PROBLEM TO BE SOLVED: To much facilitate changeover of a frequency band in unidirectional transmission and two-way transmission in a CATV system. SOLUTION: A television terminal 32 and an input terminal 33 are fitted to a main body case 31 and a synthetic-resin-made television terminal cover 34 is fitted to the main body case 31. A changeover switch for frequency changeover is fitted to a printed circuit board mounted on the main body case 31. A knob fixing base 37 is provided to the television terminal cover 34 at a position corresponding to the changeover switch and a disk knob base 39 of the switch operation knob 38 is provided inside turnably within a prescribed range. Moreover, switch movable projections 41a, 41b are provided inside of the knob fixing base 37 at a prescribed interval. The switch movable projections 41a, 41b are projected in the main body case 31 to be engaged with the knob 36a of the changeover switch to switch the changeover switch attended with turning of the switch operation knob 38. |
