← Back to Wiki
FIELD TEST / CASE STUDY

7020 20 MHz, 277 km Video Link Field Test

The 14 December 2023 test ran between Wugu Jian and Jiuling Jian. Although the source report is titled a “300 km” test, it records an actual separation of 277 km. Its three pages show the sites, setup, spectrum and bidirectional traffic results.

The report gives 11.8 Mbps in each direction. These readings must not be added as a measured simultaneous bidirectional rate. The module description's 500 km figure was not tested here.

Original report · 3 pages

Every page of the original report is reproduced with its images, tables and text. Click a page to open the full-resolution scan.

Download original PDF ↓Open PDF ↗
Page 1 of 3
7020 20 MHz, 277 km Video Link Field Test — original report page 1 with its text, tables and images
View the original text layer

Text extracted from the original PDF. For table order and labels inside figures, refer to the page scan above. The source language is preserved.

测试名称:300 公里双向图传拉距测试 
测试时间:2023 年12 月14 日 
测试地点:五股尖(海拔1618 米)到江西九岭尖(海拔1794 米),如下图所示距离为277KM。 
 
    
测试方法:五股尖九岭尖两地各放置模块,模块接电脑相互灌包测试实时带宽。 
测试模块型号: 
1、7020-46-1400:双发发双收双向图传,最大发射功率46dBm(支持强推到47dBm),中心频点1400MHz,最
大支持20MHz 带宽,单向最大47mbps 码率,支持MESH 组网,最远支持500KM。 
测试数据汇总: 
7020-46-1400 
带宽
(MHz) 
频率
(MHz) 
距离 
(km) 
空中衰
减
(dB) 
发射功
率
(dBm) 
噪底
(dBm) 
天线增
益 
(dBi) 
天线增
益 
(dBi) 
SNR 
(dB) 
五SNR 
(dB) 
九SNR 
(dB) 
五-九 
(mbps) 
九-五
(mbps) 
20 1400 277 144.2 50 -96 5 5 11.8 13 13 11.8 11.8 
注释:46dBm 模块发射功率强推到 47dBm, 双发47dBm,即等效于单发 47+3=50dBm 。 
 
Page 2 of 3
7020 20 MHz, 277 km Video Link Field Test — original report page 2 with its text, tables and images
View the original text layer

Text extracted from the original PDF. For table order and labels inside figures, refer to the page scan above. The source language is preserved.

具体测试数据见下部分: 
测试地点偏僻扫描: 
用泰克便携式频谱扫描九岭尖1.4G 频谱如下图所示,1350-1450 带内很干净。 
 
 
测试设备的参数设置: 
固定频率1.4G,带宽20MHz,详细设置如下图所示: 
 
Page 3 of 3
7020 20 MHz, 277 km Video Link Field Test — original report page 3 with its text, tables and images
View the original text layer

Text extracted from the original PDF. For table order and labels inside figures, refer to the page scan above. The source language is preserved.

两地相互灌包数据: 
五股尖往九岭尖灌包如下图所示: 
 
 
九岭尖往五股尖灌包如下图所示: