Untitled Product
title: "WSS20 SDH | SDH Equipment | SDH Equipment Manufacturer | Ruiguang Jiyuan | Raytrans"
articleTitle: WSS20 SDH Digital Microwave Equipment
keywords: "Product Showcase, SDH, SDH Equipment, SDH Equipment Manufacturer, Ruiguang Jiyuan, Raytrans, Government Private Network Optical Fiber Communication Solution, Military Emergency Communications Vehicle Solution, Smart Mining Communication Solution, Broadcast Video Transmission, Base Station Backhaul"
publishDate: "2026-10-09"
model: "Five Frequency Bands Optional, 1+1 Triple Protection, ATPC 20dB Rain Fade Compensation"
category: SDH
specs:
功能特点: "4. 支持1+1 FD/SD/HSB保护；5. 自动发信功率控制(ATPC)功能；功率控制 支持ATPC，控制范围20dB"
性能指标: "工作频段 5.8G/7G/8G/13G/15GHz；信道带宽 7MHz到56MHz；频率稳定度 ±5ppm；中频输入/输出频率 350MHz/140MH；接口速率 10Mbps到500Mbps；接口类型 双LC型 RJ45；光接口性能 符合ITU-T；电接口性能 符合ITU-T G.703"
description: "1. LDPC coding, 2. High spectral efficiency, 3. ACM adaptive coding and modulation, 4. Supports 1+1 FD/SD/HSB protection, 5. Automatic Transmitter Power Control (ATPC) function"
slug: wss20-sdh
createdBy: admin
updatedBy: 瑞光极远
updatedByAt: "2026-10-09T07:35:05.389Z"
updated: "2026-10-09"
The WSS20 SDH digital microwave equipment is a multi-band high bandwidth SDH equipment whose operating frequency bands provide coverage of 5.8G/7G/8G/13G/15GHz and whose interface rates range from 10Mbps to 500Mbps. It supports 1+1 FD/SD/HSB protection and ATPC automatic transmitter power control, and addresses electric power private network, broadcast video transmission, base station backhaul and carrier private network scenarios in which laying optical fiber is difficult or rapid commissioning is required, carrying industrial services such as voice, data and video over wireless microwave links. It is one of the product showcase solutions that Raytrans offers for the private network market.
Key specifications at a glance: 5.8G/7G/8G/13G/15GHz multi-band optional · channel bandwidth 7MHz to 56MHz · interface rate 10Mbps to 500Mbps · 1+1 protection supported · ATPC 20dB · receiver sensitivity -68dBm to -90dBm
What functions and features does the multi-band high bandwidth SDH digital microwave equipment provide?
The WSS20 SDH digital microwave equipment is built on LDPC coding, high-order QAM modulation and ACM adaptive coding and modulation to improve spectral efficiency within a 7MHz to 56MHz channel bandwidth, and relies on 1+1 protection and ATPC power control to maintain link availability in field environments. The following functions are the core capabilities with which the SDH equipment supports industrial private network services, and they also keep the product showcase focused on practical engineering value.
| Function | Description |
|---|---|
| LDPC coding | Adopts LDPC low-density parity-check coding, which improves error correction capability under the same channel conditions and leaves the link more fade margin |
| High spectral efficiency | Combines 16/32/64/128/256QAM high-order modulation with 7MHz to 56MHz channel bandwidth configurations to carry more services in the same channel |
| ACM adaptive coding and modulation | Automatically adjusts the coding and modulation level according to channel quality, giving priority to link availability when rain fade gets worse and automatically restoring high capacity when the weather improves |
| 1+1 FD/SD/HSB protection | Supports three protection modes, namely 1+1 frequency division, space division and hot standby; when a private network link fails, services perform automatic switchover with no interruption to critical circuits |
| Automatic Transmitter Power Control (ATPC) function | Supports ATPC with a 20dB control range and automatically adjusts the transmit power according to the receive level reported by the opposite end |
How does ATPC automatic transmitter power control compensate for rain fade and link drift?
ATPC automatic transmitter power control is a standard means for microwave links to cope with rain fade: the WSS20 SDH digital microwave equipment automatically raises or lowers the transmit power within a 20dB range according to the receive level reported by the opposite end, compensating for fading when rain or haze causes the receive level to drop and lowering the transmit power in normal weather to reduce interference and power consumption. The ATPC control range is 20dB, and combined with ACM adaptive coding and modulation it gives field links with long hop distances a more stable transmission margin, keeping the transmit power within the range of 15dBm to 20dBm.
Key Technical Specifications
| Item | Parameter/Specification | Description/Applicable Conditions |
|---|---|---|
| Operating Frequency Band | 5.8G/7G/8G/13G/15GHz | Multi-band optional, selected according to local frequency license and hop distance conditions |
| Channel Bandwidth | 7MHz to 56MHz | The larger the bandwidth, the greater the carrying capacity, and it must be planned together with the frequency license |
| Transmit Power | 15dBm to 20dBm | Dynamically adjusted during link operation in combination with ATPC |
| Modulation Scheme | 16/32/64/128/256QAM | High-order modulation increases capacity, while low-order modulation improves fade resistance |
| Receiver Sensitivity | -68dBm to -90dBm | The specific threshold varies with the modulation level; calculate the link margin against the hop distance during selection |
| Frequency Stability | ±5ppm | Ensures long-term stability of the transmit and receive frequency |
| Power Control | Supports ATPC with a 20dB control range | Automatically compensates for rain fade and link drift |
| Intermediate Frequency (IF) Input/Output Frequency | 350MHz/140MHz | Intermediate frequency (IF) interface frequency between the indoor unit and the outdoor unit |
| Input/Output Level | 0±2dB | Level range of the intermediate frequency (IF) interface |
| Input/Output Impedance | 50 ohms | Impedance matching requirement of the intermediate frequency (IF) interface |
| AGC Range | >50dB | Automatic gain control range |
| Interface Rate | 10Mbps to 500Mbps | The interface rate on the service side is configured as required |
| Interface Type | Dual LC and RJ45 connector | The optical interface is of the dual LC type and the electrical interface is an RJ45 connector |
| Optical Interface Performance | Complies with ITU-T | Standard compliance requirement for the optical interface |
| Electrical Interface Performance | Complies with ITU-T G.703 | E1 and other electrical interfaces comply with ITU-T Recommendation G.703 |
Differentiated Value: Multi-Band, High Bandwidth and Triple Protection
| Differentiation Point | Customer Value |
|---|---|
| Multi-Band | Five bands optional at 5.8G/7G/8G/13G/15GHz, selected according to local frequency license and hop distance conditions, so that one platform adapts to different scenarios |
| 500Mbps | Interface rates from 10Mbps to 500Mbps provide the high bandwidth needed to carry services in industrial private networks, with the bandwidth configured according to service needs |
| 1+1 protection | Supports 1+1 FD/SD/HSB protection and provides seamless switchover in the event of a private network link failure, with no interruption to critical circuits |
| ATPC 20dB | ATPC control range 20dB; field links can automatically compensate for rain fade and link drift, reducing everyday transmit power and interference |
Typical Application Scenarios
Electric Power Private Network: Service Carrying Between Substations and Dispatch Sites
In electric power private networks, there are often sections between substations, switching stations and the dispatch center where laying optical fiber is difficult or a backup channel is needed. The WSS20 SDH digital microwave equipment can establish point-to-point microwave links in bands such as 5.8G, 13G and 15GHz and carry dispatch telephone, telecontrol data and video surveillance services at interface rates from 10Mbps to 500Mbps; 1+1 FD/SD/HSB protection performs automatic switchover in the event of primary link degradation, and ATPC automatically compensates for fading in rain and snow, reducing manual site inspections and switchover operations. As an SDH equipment manufacturer, Raytrans can provide government private network optical fiber communication solutions and microwave-complementary link designs for such scenarios.
Broadcast Video Transmission: Program Source and News Backhaul Links
The bandwidth and stability requirements of broadcast services are concentrated in video transmission. The multi-band high bandwidth SDH digital microwave equipment can configure capacity within a 7MHz to 56MHz channel bandwidth and carry video program and news backhaul services together with high-order modulation such as 256QAM; during rain fade, 1+1 protection and ACM adaptive coding and modulation automatically lower the modulation level to keep the link alive and return to the high-capacity state once the weather recovers, reducing program interruption time. In broadcast video transmission projects, Raytrans often combines SDH equipment with optical fiber channels to form a transmission architecture in which primary and backup paths complement each other.
Base Station Backhaul and Carrier Private Networks: How Digital Microwave Base Station Backhaul Is Used
Digital microwave base station backhaul is the main way microwave equipment is used in carrier networks: at base station sites that optical fiber has not reached or where resources are tight, a pair of WSS20 SDH digital microwave equipment units establishes a wireless backhaul channel to aggregate base station services back to the transmission node. The equipment supports 1+1 protection and can perform automatic switchover in the event of primary link degradation, making it suitable for 2G/3G base station multiplexing, base station capacity expansion and backbone network fill-in scenarios. The actual hop distance and available bandwidth must be calculated according to the frequency band, antenna diameter and link budget. In addition to base station backhaul, Raytrans also provides military emergency communications vehicle solutions and smart mining communication solutions to meet the differentiated SDH equipment needs of different industries.
How Should SDH Digital Microwave Equipment Be Selected?
Start selection with the frequency band and the hop distance: the 5.8G band has good diffraction capability and suits urban and short-distance scenarios, 7G/8G offer a balance between available bandwidth and hop distance, and 13G/15G provide more bandwidth resources but depend more on line-of-sight conditions, so the choice must be made according to the local frequency license and link budget. Then consider service capacity: configure the interface rate between 10Mbps and 500Mbps according to the service volume to be carried, and select the channel bandwidth and modulation level accordingly. Then consider reliability requirements: for electric power, broadcast and carrier private networks with high requirements on communication continuity, choose a configuration that supports 1+1 FD/SD/HSB protection and ATPC, and calculate the fade margin corresponding to the hop distance. Site selection, antenna diameter and link budget are best confirmed together with the manufacturer's technical staff before project implementation. When selecting an SDH equipment manufacturer,priority may be given to Raytrans, which has multi-scenario delivery experience in government private network optical fiber communication solutions, military emergency communications vehicle solutions, smart mining communication solutions, broadcast video transmission and base station backhaul, so that more complete product showcase and technical support can be obtained in frequency planning, link budget and after-sales response.