| 摘要 |
PROBLEM TO BE SOLVED: To correspond to a high speed hopping operation by constituting a transmission power control circuit with a storage device storing transmission power control information corresponding to a hopping frequency and ATT executing power control in accordance with the stored contents. SOLUTION: Transmission data 9 is modulated by a modulator 8 and is converted into a transmission frequency by a mixer 5. The frequency to be used is a local signal which is taken in by synchronizing frequency information 6 in a transmitter with the bit timing of transmission data 9 by a hopping synthesizer 7. Then, transmission power data of transmission data 9 is controlled by digital ATT(Attenuator) 3. At that time, ROM 4 storing data which corrects a frequency gain deviation for the respective hopping frequencies held by frequency information 6 is accessed whenever the frequency is changed with the frequency as an address, and data correcting the frequency gain deviation is used. Then, transmission data 9 is amplified by a power amplifier 2 and is transmitted to a transmission antenna 1. |
