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    • By Admin / 09 Sep 24 / 0 Comments

      WIFI Technology Overview

      WiFi is an international Wireless local area network (WLAN) standard, full name Wireless Fidelity, also known as IEEE802.11b standard. WiFi was originally based on IEEE802.11 protocol, published in 1997, defined WLAN MAC layer and physical layer standards. Following the ...
      WIFI Technology Overview
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    • By Admin / 06 Sep 24 / 0 Comments

      Optical eye image debugging

      Optical eye image debugging Target: Extinction ratio Research and development stage: between 10-15 (large is better than small), according to the actual situation can be appropriate to improve the extinction ratio, but not too low. It's related to sensitivity. Quiver ...
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    • By Admin / 27 Aug 24 / 0 Comments

      The construction of the test environment

      Core and principle of test environment construction: 1. Check whether the optical power exists Generally use optical power to test whether there is optical power; And the optical power of some ophthalmograms is -2dbm, -3dbm, etc. 2. Whether the clock is accurate The cl...
      The construction of the test environment
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    • By Admin / 27 Aug 24 / 0 Comments

      Light eye map basic explanation II

      A deep interpretation of jitter If the data rate of the system is increased, the jitter amplitude measured in a few seconds will remain roughly the same, but when measured in a fraction of the time of the bit period, it will increase proportionately with the data rate, r...
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    • By Admin / 13 Aug 24 / 0 Comments

      tcpreplay Stream Test Method

      Test schematic diagram: System version: Ubuntu16.04 Tcpreplay installation: apt-get install tcpreplay (This version of the NIC name is not called eth0 and eth1, the following configuration chang...
      tcpreplay Stream Test Method
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    • By Admin / 13 Aug 24 / 0 Comments

      Nirtual local area network

      A virtual local Area Network (VLAN) is a communication technology that divides a physical LAN into multiple broadcast domains logically. ​ Each VLAN is a broadcast domain. Hosts within a VLAN can directly communicate with each other, but cannot directly communicate with ...
      Nirtual local area network
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