接收机部分。注意在混频后引出了到DTMF指令接收机的支路。
指标如下:
..Input:435 MHz
..Noise Figure:< 3.5 dB
..Image Rejection:> 90 dB
..AGC Threshold:-120 dBm
..IF Output: 10.7 MHz. at -13 dBm
..DC Input Power:+8 Vdc @ 135 mA (1.08 watts)
..Frequency Accuracy :+/-1 PPM ( 435 Hz at 435 MHz)
..Frequency Stability:+/-2.5 PPM (-30 to +70C)
..PCB Size:2.35”(60 cm) X 2.8”(71 cm)