| 摘要 |
PROBLEM TO BE SOLVED: To provide an SN ratio detector which can detect highly accurate SN ratio information directly from a demodulated signal. SOLUTION: Superheterodyne receivers 10a, 10b are connected in parallel. Local oscillation frequency at a local oscillating section 18a is set higher, by an amount of intermediate frequency, than the frequency of a high frequency input signal while the frequency at a local oscillating section 18b is set lower, by an amount of intermediate frequency, than the frequency of the high frequency input signal. Demodulated output signals from these superheterodyne receivers 10a, 10b are synthesized at a synthesizing section 28 and detected at a detecting section 30 which outputs SNi ratio information. |
