| 摘要 |
A system for automatically skipping unused channels in tuning through a sequence of used and unused channels. The tuning means causes a tuning signal to be applied to the system to allow a free-running pulse generator to supply pulses to an actuator as long as the tuning signal continues to be supplied. The actuator enables each of a series of channel control means one at a time and in order, changing from one to the next at the occurrence of each pulse. In order to keep the tuning from stopping on an unused channel, all of the channel control means are connected to a skip control means that supplies its own signal to allow the pulse generator to continue supplying pulses as long as the enabled channel control means is for an unused channel. The skip control means can derive its actuating signal from the voltage supplied by an output potentiometer for each channel control means to supply voltage to a variable reactance element. |
