1. 3 4 DTMF 1 5 6 3 2 0mm 315 mm 1 45mm 2 7 2. dBpV m 30 d BunV m 1 2 3 dB 4 m PZ 1 2 Uy 1 3 1 7 3. 3 0 d Bu V m 3 1 2 3 CC 4 ee 8 0566 71 2220 4. 9 9 2 5. 8 7 8 1 9 2 1 1 AM FM F M 1 5pV 1 1 1 S N 3 0dB 6. 2 6 8 1 FM 2 1 1 38 2 5 3 1 4 2 7 3 2 0 5 1 2 3 4 Fm ZH ak zk 6 1 FM 2 7. AM 7 0dBg V m 13wV D TMF ON 2 OFF 5 DTMF AC LED L LED 3 AC 4 0 6W 5 2 DC50V 100mA