1. 서론
The Retekess TD021 RF Wireless Repeater is designed to extend the signal range of 433 MHz wireless calling systems. This device amplifies the signal from wireless transmitters, such as call buttons, allowing it to reach receivers over longer distances or through obstacles like walls. It is an essential component for optimizing communication efficiency in various settings, including restaurants, hospitals, and other service-oriented environments.
2. 제품 오버view
2.1 패키지 내용
패키지에 모든 품목이 들어 있는지 확인하세요.
- 1 x Retekess TD021 RF Wireless Repeater
- 1 x 전원 어댑터
- 1 x 사용자 설명서

Figure 1: Package Contents - Repeater, Power Adapter, and Manual.
2.2 장치 구성 요소
Familiarize yourself with the main components of the TD021 repeater:
- Telescopic Antennas: Two external antennas for signal transmission and reception.
- 전원 표시등(빨간색): 기기의 전원이 켜지면 켜집니다.
- Signal Transmission Indicator (Green): Flashes when a signal is being transmitted.
- 충전 포트(DC 12V): 전원 어댑터를 연결합니다.
- 8-Bit Dialing Switch (DIP Switch): Used for configuring the repeater's settings.

Figure 2: Product Details - Key components of the TD021 Repeater.
2.3 주요 특징
- 확장된 범위: Doubles the signal distance of wireless call systems.
- 높은 호환성: Works with all Retekess or Tivdio wireless call systems operating at 433 MHz.
- 컴팩트한 디자인: Small dimensions (approximately 99mm x 70mm x 25mm) for flexible placement.
- Cascading Capability: Multiple repeaters can be used in series to further extend coverage.
- 간편한 설치: 간단한 설치 과정.

Figure 3: Small Size Design - Dimensions and mounting options.
3. 사양
| 특징 | 세부 사항 |
|---|---|
| 상표 | 재회 |
| 모델 번호 | EUF4408A |
| 색상 | 검은색 |
| 특별 기능 | 무선 전화 |
| 호환 장치 | Devices with 433 MHz frequency and compatible radio standard |
| 무선 통신 표준 | 고주파 |
| 품목 무게 | 97그램 |
| 제품 크기(L x W x H) | 99mm x 70mm x 25mm |
| 지원되는 주파수 대역 | 433MHz |
| 범위 | 최대 1000미터 (개방된 공간 기준) |
4. 설정
4.1 배치
Optimal placement is crucial for maximum signal extension. Position the repeater between the wireless transmitter (e.g., call button) and the receiver (e.g., display screen or watch pager) in an area where the signal from the transmitter starts to weaken. Avoid placing it near large metal objects or other sources of electromagnetic interference.

Figure 4: Long Transmitting Distance - Illustrates signal extension through obstacles.
For very large areas or complex layouts, multiple repeaters can be cascaded. Place each repeater within the extended range of the previous one to create a chain of signal amp합리화.

Figure 5: Cascading Design - Adding multiple repeaters for wider coverage.
4.2 전원 연결
- Connect the provided power adapter to the DC 12V charging port on the repeater.
- 전원 어댑터를 표준 전기 콘센트에 연결하십시오.
- 빨간색 힘 indicator light will illuminate, indicating the device is receiving power.
4.3 DIP 스위치 구성
The 8-bit DIP switch on the back of the repeater is used to set its operating mode or code, ensuring compatibility with your existing wireless calling system. Refer to your specific call system's manual for the correct DIP switch settings. Generally, the repeater's DIP switch settings should match those of the transmitters and receivers it is intended to work with.
- Use a small tool (e.g., a pen tip) to adjust the individual switches to the ON or OFF position as required.
- Ensure the settings are identical to your call system components for proper functionality.

Figure 6: DIP Switch - Configuration for system compatibility.
5. 사용 설명서
5.1 기본 작업
Once the repeater is powered on and configured with the correct DIP switch settings, it operates automatically:
- When a wireless call signal from a compatible transmitter is detected within the repeater's range, the repeater will receive it.
- The repeater then re-transmits the amplified signal. During re-transmission, the green 보내다 표시등이 깜박입니다.
- 그만큼 amplified signal can then reach receivers that were previously out of range or experiencing weak signals.

Figure 7: Signal Extension Principle - How the repeater doubles transmission distance.
5.2 호환성
The TD021 repeater is designed to be highly compatible with various 433 MHz wireless calling devices, including different types of call buttons and display receivers or watch pagers from Retekess and Tivdio.

Figure 8: Compatible Products - Examples of devices that work with the repeater.
6. 유지관리
- 청소: Use a soft, dry cloth to clean the exterior of the repeater. Do not use liquid cleaners or abrasive materials.
- 환경: 기기를 직사광선, 극한 온도, 높은 습도를 피해 건조한 환경에 보관하세요.
- 안테나 : Ensure the telescopic antennas are not bent or damaged. Extend them fully for optimal performance.
- 전원 공급 장치: 기기와 함께 제공된 정품 전원 어댑터만 사용하십시오.
7. 문제 해결
7.1 전원 없음
- 전원 연결을 확인하세요. Ensure the power adapter is securely plugged into both the repeater and the electrical outlet.
- 콘센트 확인: 다른 장치로 전기 콘센트를 테스트하여 제대로 작동하는지 확인하세요.
- 전원 어댑터: 전원 어댑터가 손상되지 않았는지 확인하십시오.
7.2 Signal Not Extending
- 딥 스위치 설정: Confirm that the 8-bit DIP switch settings on the repeater match those of your transmitters and receivers. Incorrect settings are a common cause of signal issues.
- 중계기 배치: Reposition the repeater. It should be placed within the range of the transmitter and also within range of the receiver. Avoid obstacles like thick walls or metal structures.
- 안테나 : Ensure both telescopic antennas are fully extended and oriented correctly.
- 간섭: Move the repeater away from other electronic devices that might cause interference.
- Transmitter/Receiver Functionality: Verify that the original transmitters and receivers are working correctly without the repeater.
7.3 간헐적 신호
- 거리: The repeater might be at the edge of the signal range. Try moving it closer to either the transmitter or receiver.
- 장애물: Environmental factors such as thick walls, metal structures, or other radio frequency devices can cause intermittent signals. Adjust placement to minimize these obstructions.
- 전력 안정성: 전력 공급이 안정적이며 변동이 없는지 확인하세요.
8. 보증 및 지원
8.1 보증 정보
레테케스는 다음을 제공합니다. 2년 보증 이 제품의 경우, 다음과 같은 사항이 포함됩니다. 30일 이내 이유 없는 반품 정책. This warranty covers manufacturing defects and malfunctions under normal use.
8.2 보증 기간 이후 서비스
Beyond the warranty period, Retekess continues to offer maintenance services. Buyers are responsible for any corresponding costs associated with repairs or parts after the warranty expires.
8.3 고객 지원
For any questions, technical assistance, or warranty claims, please contact Retekess customer support through Amazon. We aim to respond to all inquiries within 12 hours.





