| 摘要 |
<p>PURPOSE:To reduce the size and weight without deteriorating S/N ratio by using as local signal of a Doppler detection mixer and second COHO signal obtained by mixing an own speed compensation signal and a COHO signal with an own speed compensation mixer. CONSTITUTION:A received signal amplified with an intermediate frequency amplifier 2, an own speed compensation signal (fO+ or -fC) generated with an own speed compensation control signal generator 5 and a voltage controlled quartz oscillator 6 and a COHO signal (fIF-fO) generated with a COHO signal generator 7 are mixed with an own speed compensation mixer 3. The resulting signal is mixed with the second COHO signal with an own speed compensation by a Doppler detection mixer 4 to make a Doppler video signal.</p> |
