Here are the most important tests performed in transmission networks
1) XPD Test
It’s called cross polarization discrimination
it aims to detect the interference Level between vertical and horizontal in XPIC Links
XPI value determine the microwave system performance and we need to achieve high value ( 25-30 or higher )
2) Interference Test
Important test in microwave Links to ensure the Interference on the received signal is within the limit
we perform this test by shutting down the far end and monitoring the Rx level on near end
3) Loopback Test
It’s a general test , can be performed in microwave , optical , network devices
used to detect the faulty segment and to make troubleshooting
4) Protection Test
This test aims to ensure the backup Link will smoothly and automatically switching in case of any failure happen with main Link
protection test mainly performed with 1+1 Links
5) Bit Error Test
It’s a very important test , general test that means can be run on any digital system
it’s purpose is to detect the Level of errors in Data link
6) Latency Test
Important test specially in real Time application Links , used to measure latency in milli seconds
7) Throughput Test
This test measures the amount of data rates , capacity measured
mentioned picture describe the OLP 1+1 ( optical line protection in WDM )
