This manual introduces the functions and operation methods of the R18 type RDS digital information frequency modulation transmitter.
This manual provides step‑by‑step instructions for using the R18 RDS digital information FM transmitter. It covers basic operation, frequency adjustment, audio input handling, and partition addressing for multiple receivers.
Installation guidance includes antenna mounting, power source connection (12‑15 V DC via car cigarette lighter or external supply), and safety precautions such as ensuring the antenna is properly connected before powering the unit. This manual is written in Chinese.
| Frequency setting range | 76‑108 MHz |
|---|---|
| Power output | >15 W |
| Frequency step value | 100 kHz |
| Frequency stability | ±5 ppm (-10 °C ~ +50 °C) |
| Modulation type | ±75 kHz |
| Antenna impedance | 50 Ω |
| Modulation sensitivity | 0.1 V |
| Audio frequency response | 80 ~ 15000 Hz |
| Signal‑to‑noise ratio | ≥65 dB (1 kHz, 100 %) |
| Stereo separation | ≥‑75 dB (100 ~ 15000 Hz) |
Press and hold the DO/MD key to enter frequency adjustment mode (display shows 02), then use the UP/SC keys to step the frequency up or down; hold the keys for faster changes.