| 摘要 |
PURPOSE:To make a frequency deviation data arithmetic means small in size and low in cost by setting variably a frequency of a reference oscillator for a transmitter for test utilizing a signal from a CPS satellite to measure its own location and time. CONSTITUTION:Clocks of 10MHz and 5MHz other than a P code clock of 10.23MHz being a conventional reference are used as reference signals for a GPC signal generator. A new variable P code clock generator 3 is provided for the purpose and a generator to generate independent variable L1 and variable L2 waves is newly provided to eliminate a frequency multiplier from the CPS signal generator. Moreover, as the generator, a variable L1IF generator 4 and a variable L2IF generator 5 generating directly a frequency corresponding to that of an IF band signal offering ease of handling without using an L band signal are adopted. Furthermore, the reference generator corresponding to the highly accurate configuration, a variable P code clock generator, the variable L1IF generator and the variable L2IF generator are synchronized to control the frequency deviation digitally. |
