Digital Fiber DAS
Digital Fiber DAS
Introduction
The digital fiber DAS converts electrical signals into optical signals through a photoelectric conversion module (SFP Transceiver Module), and remotely transmits signals through optical fibers to achieve wireless signal coverage. According to the difference of the access signal, it is divided into: base station direct coupling fiber DAS and wireless antenna fiber DAS.
Product Features
| 1 | Support Donor antenna and BTS coupling method |
| 2 | Support GSM /NB-IoT/FDD-LTE MIMO/TD-LTE MIMO system combination, maximum 4 bands at the same time. |
| 3 | Remote Unit support DC power remote supply or local VC power supply. |
| 4 | Integrated Master unit and DC remote power supply |
| 5 | DC remote power supply system has independent short circuit and overvoltage protection function |
| 6 | Fanless natural heat dissipation design |
| 7 | TDD system adaptive support for uplink and downlink time slot |
| 8 | Remote unit is with high quality IP65 protective die cast chassis |
| 9 | Optical modules supports single-fiber and dual-fiber networking architectures. |
Fiber Optical Repeater DATA Sheet
| Uplink | Downlink | |
| Opitical Wave Length | 1550nm | 1310nm |
| Optica Output Power | -9dBm～3dBm | |
| Optica Receive Sensitity | -18dBm(C/N>24dBm) | |
| SFP Module | Single Mode or Dual Mode:1550/1310nm | |
| Optical Distance | 0-2Km | |
| Optical Port | 4 Ports Of LC/PC | |
| System Parameter | ||
4 bands/ Maximum bandwideth:45MHz or 2 bands/Maximum:90MHz |
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| System Gain (accept Customization) | Wireless feed: 80 ± 2 dB uplink (master: 45dB slave: 45dB) downlink 85 ± 2 dB wired feed: 35dB ± 2dB uplink 35dB ± 2dB downlink | |
| Maximum Output (Accept Customization ) | Wireless feed: uplink: 23dBm ± 2dB; wired feed: uplink: -15dBm ± 2dB Wireless / wired feed: downlink 27dBm ± 2dB (0.5W type) 33dBm ± 2dB (2W type) | |
| ALC | Uplink: Wireless feed: -15dBm ± 2dB (or off) Wired feed: 17dBm ± 2dB (or off) Downlink: 27dBm ± 2dB / 33dBm ± 2dB (or off) | |
| Gain Adjust Range | Uplink ≥20dB Downlink ≥20dB | |
| Frequency Error | ≤0.01ppm | ≤0.01ppm |
| EVM | ≤5% | ≤-40 dBc |
| Out of band Emission | ≤ -36dBm@9KHz - 1GHz | |
| ≤ -30dBm@1GHz - 12.75GHz | ||
| Noise Figure | ≤7 dB(1:1) | |
| System Delay | ≤7.0μs | |
| VSWR | ≤ 1.8:1 | |
| Maximum input level | Uplink: -10dBm Downlink: 10dBm | |
Digital Fiber Optical Repeater Appearance
1.Main Unit (Master Unit or Access Unit MU)
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| Donor Antenna Wireless Access Unit: l Supported standards: GSM, CDMA, WCDMA, FDD-LTE, TDD-LTE l Automatic level control: the input signal level is increased by ≤10dB, and the output power should be kept within ± 2dB of the maximum output power; when it exceeds 10dB, it should be kept within ± 2dB of the maximum output power or turned off l Gain: The maximum gain change range is within 45 ± 3dB, the gain adjustment range: ≥15dB l Maximum allowable input level: The maximum non-impaired input power on the uplink is 17dBm ± 2dB; the maximum non-impaired input power on the downlink is 27dBm ± 2dB / 33dBm ± 2dB (or off) l Size: 440mm × 330mm × 90mm (2U chassis) l Power supply mode: -48Vdc or 220Vac (The main difference is: low-noise amplifier is added on the uplink, dry amplifier is added on the downlink) Currently sold in: more than 500 units | Base station coupled to the main unit: l Supported standards: GSM, CDMA, WCDMA, FDD-LTE l Automatic level control: the input signal level is increased by ≤10dB, and the output power should be kept within ± 2dB of the maximum output power; when it exceeds 10dB, it should be kept within ± 2dB of the maximum output power or turned off l Gain: The maximum gain change range is within 45 ± 3dB, the gain adjustment range: ≥15dB l Maximum allowable input level: The maximum non-destructive input power on the uplink is -10dBm; the maximum non-destructive input power on the downlink is + 10dBm l Size: 440mm × 330mm × 45mm (1U chassis) l Power supply mode: -48Vdc or 220Vac Currently sold in: more than 1000 |
2.Extension Unit (EU/EHUB)
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| Indoor IP40 Version | Outdoor IP65 Version |
| The extension unit forwards the digital signals issued by the access unit to multiple remote units; at the same time, the signals uploaded by the multiple remote units are combined and then transmitted to the access unit. Extension units support chain-type cascading networking. The extension unit supports remote monitoring and management of the remote unit to which it belongs. l Supported standards: GSM, CDMA, WCDMA, FDD-LTE l Remote power supply function: support -48V DC remote power supply l Size: 440mm × 260mm × 70mm (indoor /) 440mm × 360mm × 70mm (outdoor) l Extension unit: Supports 1 extend 7 or 1 extends 11 interfaces. This is only required for large-scale coverage, such as covering a CBD or some areas which is more than 50,000 square meters. Because this equipment is mainly sold with the main unit and remote unit, the normal site is that one main equipment will be equipped with 2 extensions and 15 remotes, each remote coverage area is 1500 ~ 2000 square meters, the general site is 30,000 To about 150,000 square meters. l The current sales volume is more than 1,000 units, and the quality is stable | |
3.Remote Unit （Remote Coverage Unit RU）
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| l Support GSM, CDMA, WCDMA, FDD-LTE l Maximum output power: The nominal (maximum) output power of each system is 500mw / 2w, and the tolerance within ± 2dB. l Size 350 * 195 * 120mm (without antenna) 350 * 260 * 120mm (with antenna) l Supports a combination of two systems with a maximum bandwidth of 60MHz or three systems, each with a maximum bandwidth of 50MHz (supports customized maximum bandwidths such as 75MHz) l IP65 (waterproof case design) l Power supply mode: -48Vdc (photoelectric composite cable) or 220Vac l More than 10,000 units (stable performance) was sold | l This die-cast case is used for equipment over 5W, which is convenient for heat dissipation and outdoor installation. l IP65 l Support customization of different systems, bandwidths, and customization of various powers below 40W l Local 220Vac l More than 1000 units was sold | |
| The remote unit converts the digital signals issued by the extension unit or the main unit into radio frequency signals to achieve wireless coverage of CDMA, WCDMA, FDD-LTE; at the same time, the received uplink radio frequency signals are converted into digital signals and transmitted to the expansion unit or the main unit | ||
