PRODUCTS
FM / DMB Repeater
- Anti-Drone System
- Signal Strength Telemetry System for Train Radio Signals.
- Intelligent Transmission list Management System
- Edge Handler (Remote Integrated Management System)
- Network Quality Management System
- Intelligent Connect Panel
- FM / DMB Repeater
- BDA (Bidirectional Amplifier)
- Smart Voice Recognition Emergency Bell
- Intelligent Station Integration Device
- LiFePO4 Battery System
- Dynamic Train Car-Number Indicator
- IOT Terminal
Application equipment
FM / DMB Repeater
System Overview
System for retransmitting FM radio and T-DMB broadcasts in building underground/subway/road/railway tunnels, etc.
System Structure
FM / DMB Repeater
| NO | Product name | Height |
|---|---|---|
| 1 | DMB Digital receiver | 3U |
| 2 | FM receiver | 3U |
| 3 | BC / EM controller | 2U |
| 4 | FM transmitter | 2U |
| 5 | BLANK | 1U |
| 6 | DMB 8CH transmitter | 3U |
| 7 | DMB 12CH transmitter | 3U |
| 8 | DUPLEXER | 4U |
| 9 | BLANK | 1U |
| 10 | Multiband synthesizer | 2U |
| 11 | FM receive distributor | 2U |
| 12 | DMB receive distributor | 2U |
| 13 | DC power supply | 3U |
| 14 | DC power supply | 3U |
| 15 | BATTERY | 5U |
System Specifications
| Specification | Standard | Unit | Note | |
|---|---|---|---|---|
| Frequency range | FM | 88 ~ 108 | Mhz | |
| DMB | 180 ~ 210 | |||
| RF input level | -40 ~ -80 | dBm | ||
| Transmitter output | Up to 40 (variable) | W | ||
| Gain | 30 or more | dB | ||
| Signal to noise ratio | 40 or more | dB | ||
| Harmonic suppression ratio | 50 or more | dB | ||
| Power-supply voltage | DC 12V / 50V [Built-in constant voltage circuit) | V | ±10% | |
| Size (horizontal x vertical x high) | 600Ⅹ750Ⅹ2100 | mm | ||
System Functions
| Item | Main functions |
|---|---|
| Digital DMB receiver | The DMB signal input from the DMB reception distributor is filtered by the DSP function and sent to the DMB 8CH transmitter and DMB 12CH transmitter, respectively. |
| FM receiver | Built-in DSP function sends FM signal filtered for each channel to BC / EM controller |
| BC / EM controller | Receive FM receiver signal to amplify and control output |
| FM transmitter | Amplifies the small output FM broadcast signal input from the BC / EM controller, amplifies it with an appropriate output (maximum 40W), and sends it to the multi-band synthesizer. |
| DMB 8CH transmitter | Amplifies the DMB 8CH signal input from the digital DMB receiver and amplifies it to an appropriate output (max. 40W) and transmits it to the DUPLEXER |
| DMB 12CH transmitter | Amplifies the DMB 12CH signal input from the digital DMB receiver, amplifies it with an appropriate output (maximum 40W), and sends it to DUPLEXER. |
| DUPLEXER | After synthesizing the DMB 8CH and 12CH transmitter outputs into one DMB signal, the high output DMB broadcast signal is sent to the multi-band synthesizer. |
| Multiband synthesizer | FM broadcasting, VHF, DMB, fire fighting radio frequency, and Police Agency frequency band are combined and output as one output. |
| FM receive distributor | Amplifies the FM broadcast signal received from the DMB reception distributor and has a built-in gain adjustment function, and sends the appropriate FM signal to the FM receiver. |
| DMB receive distributor | The weak signal input to the external receiving antenna is sent to the FM broadcast signal to the FM reception distributor, and the DMB signal is amplified and sent to the digital DMB receiver. |
| DC power supply | Main As a DC power supply Input voltage: AC220V, Output voltage: DC50V ± 10%, DC12V ± 10%' |
| BATTERY | 12V/24AH * 2EA |
