| 摘要 |
<p>PURPOSE:To make it possible to obtain a stable modulation characteristic even if an environment changes, by a simple constitution wherein the coding signal stored in a memory is read and the frequency of a transmission signal subjected to D/A conversion is converted to transmission frequency. CONSTITUTION:The synchronous signal generator 11 of a synchronous signal generation means 1 responds to the stabilizing oscillator 54 of a frequency converting means 5 and a memory 13 is accessed through a repeated frequency generator 12 and a sequence controller 2 to read a coding signal as a transmission signal. The coding signal not changed by an environment is supplied to the mixer 52 of the means 5 equipped with filters 51, 53 through a D/A converter 4 and a radar transmitting modulation signal converted to transmission frequency is outputted. By this simple constitution not using PLL but using a memory, stable radar, of which the modulation characteristic does not almost change even if an environmental condition such as temp. or humidity changes, is obtained.</p> |
