RC-FM 2000M FM Transmitter Digital Display High Performance Transmitter 0.5W 500mW Stereo 76-108M

RC-FM 2000M FM Transmitter Digital Display High Performance Transmitter 0.5W 500mW Stereo 76-108M

Specification:
- Model: RC-FM
- Version: V100
- Output frequency: adjustable frequency with a working range of 76-108MHz, 1MHz or 0.1MHz step, 320 transmission frequencies in total, with memory function
- Output power: 10~500mW (0.01~0.5W) at 88-108MHz
- Receiving equipment: ordinary radio. A radio that can receive FM broadcasting can well receive the signals transmitted by this transmitter.
- Display mode: LCD display, the display content is the current transmission frequency, and the production data of FM transmission antenna is attached. The actual measurement shows that the maximum distance of the transmitter in the open area is 2000 meters.
- Power supply voltage: 5V USB - Type-C
- Power supply current: 500mA
- Input signal: Audio Stereo, 3.5mm interface
- SNR: 63dB 0.05%THD
- Weight: 120g
- Size: 8 x 4.8 x 1cm

Statement:
- When using wireless transmission equipment, please comply with the relevant provisions of the local radio management committee and national laws. Those who arbitrarily modify and increase the transmission power and the range of use will bear the consequences, and we will not bear any responsibility.

Q&A:
Q: What is this for?
A: This is an FM transmitter. It can be seen as a small FM radio station, which inputs audio signals, outputs FM high-frequency signals, and transmits them to the air through the antenna. People in the distance use radio to receive.

Q: Is this transmitter stereo?
A: Yes, this is a stereo transmitter.

Q: Can the transmitter use a microphone?
A: The transmitter cannot be directly plugged into the microphone. If a microphone amplifier is used, the amplified microphone signal can be input to the transmitter.

Q: How to set the transmission frequency?
A: The transmission frequency can be adjusted by the two buttons on the panel. You can choose to change the frequency in steps of 1MHz or 0.1MHz. If you stop pressing the button for 5 seconds, the transmitter will automatically remember the current set frequency. The next time you start the transmitter, it will automatically transmit at this frequency. You do not need to set the frequency again.

Q: How to adjust the transmission power?
A: Press and hold the UP key to enter the power setting mode, and press the DOWN/UP key to set the transmission power. The transmission power can be set between 10mW and 500mW, with a total of 11 power levels. Press the key to stop for 3 seconds and automatically switch to the frequency adjustment mode and save the current transmission power. The next power-on will automatically remember the previous transmission power and frequency.

Q: Can it really launch 2000 meters?
A: Transmission distance is directly related to transmission power, propagation conditions and antenna performance. The transmission distance of 200 meters is achieved under the conditions of 500 mW transmission power, antenna installation on the 14th floor and no blocking between transmission and reception. The antenna is strictly adjusted by the antenna analyzer, and the standing wave at the transmission frequency is 1.2.

Q: Can I connect the rod antenna directly to the transmitter?
A: Yes, but pay attention to judge a phenomenon: if you hear beep or buzzing in the radio after using the rod antenna, it means that it is disturbed. At this time, we can reduce or avoid this by reducing the transmission power. If there is always exist this interference, you can only keep the transmitting antenna away from the transmitter and front-end audio source. The antenna is a radiator. When the transmitting power is large, it will cause interference to the surrounding electrical equipment. So once you find that your preamplifier cannot work under strong signal, you can only keep the antenna away from the transmitter and preamplifier through the feeder, which can effectively avoid interference.

Q: Why can the signal be received at +/- 0.1MHz near the receiving frequency point?
A: This is because the signal received by the radio is too strong. At this time, there is no such phenomenon when the radio is away from the transmitter.

Q: How to power the transmitter?
A: The transmitter uses 5V DC power supply, and the power supply interface is USB Type C. The current consumption is about 500mA. If the power supply with poor quality is used, the transmitter may not work properly or the transmission quality may be degraded, and the radio end will receive obvious noise.

Q: What is the transmitter audio input interface like?
A: The standard 3.5mm audio interface is used for input, and the input volume should be appropriate. There is a friend in the evaluation area whose input is too large and obviously distorted. The volume should be reduced until the final effect reaches the quality of general FM radio station. Note: This transmitter does not support microphone input!.

Q: What is the transmitter antenna interface like?
A: The transmitter antenna interface is SMA-K specification. The corresponding antenna side needs to use the SMA-J connector.

Package Included:
- 1 x FM Transmitter