| 摘要 |
PURPOSE:To keep a frequency difference between 2 sets of VFOs constant by providing a switch using in common a frequency setting clock input between inputs of each frequency data register to turn on the said switch thereby increasing/ decreasing frequency data of the data registers afterward in the same step. CONSTITUTION:A radio communication equipment is provided with two sets of digital VFOs 1A, 1B setting its frequency depending on increase/decrease in an input digital pulse, and frequency data registers 2A, 2B are connected respectively to both the VFOs 1A, 1B. A clock input is applied to each of the registers 2A, 2B via a switch 3 and an output of the VFOs 1A, 1B is given to an MIX via the switch 3. A switch 5 making the frequency setting of respective VFOs 1A, 1B common is provided between inputs 21, 22 of the registers 2A, 2B. Then the switch 5 is turned on, the frequency data for the registers 2A, 2B afterward is increased/decreased in the same step to make the frequency difference between the VFOs 1A, 1B constant, making the operation of the radio equipment stable. |
