| 摘要 |
PURPOSE:To permit a reference input to reduce the level fluctuation and higher harmonics components and to facilitate control on operation and performance by connecting phase locked oscillators for transmission and reception through the amplifier of a saturated operation, a band pass filter and a frequency divider. CONSTITUTION:First, the amplifier 5 is in the saturated operation and the fluctuation of an output level is set smaller than that of the reference input level. Second, the band pass filter 6 which passes the frequency of a reference input is connected in the output level of the amplifier 5 and therefore the higher harmonics components which are distorted in the output of the saturation operation is removed. To put it concretely, the frequency of the reference input shows 50MHz and level fluctuation shows 10dB, whereas level fluctuation is kept to + or -1.5dB at the output terminal of the band pass filter 6 in the temperature fluctuation of -40 deg.C to +85 deg.C. The higher harmonics components are set less than 40dBc. Such reference input signals are inputted to respective phase locked oscillators for transmission and reception 2 and 3 through the frequency divider 7. Thus, an outdoor communication equipment integrated with the phase locked oscillators which stably operate under severe conditions of the outdoors is realized. |
