Step-by-Step

Prerequisite

1. Download the latest release Cable Performance Optimization Methodology Releases

2. Install the required Python packages by running the following command:

pip install -r requirements.txt

The required packages are listed in the requirements.txt file.

Note

tdl-xoa-driver is developed by Teledyne LeCroy Xena. You can read more about this package in XOA Driver Documentation.

Change Test Configuration

Go to test/ directory, change the test_config.yml to meet your test setup and requirements.

test_config:
  chassis_ip: "10.165.136.60"
  username: "CPOM"
  password: "xena"
  tcp_port: 22606
  log_filename: "xena_cpom.log"
  rx_output_eq_test_config:
    module_list:
      - 3
      - 6
    port_pair_list:
      - tx: "3/0"
        rx: "6/0"
    module_media: "QSFPDD800"
    port_speed: "1x800G"
    lane: 1
    delay_after_reset: 2
    prbs_config:
      polynomial: "PRBS31"
      duration: 2
    rx_output_eq_range:
      amp_min: 0
      amp_max: 3
      pre_min: 0
      pre_max: 7
      post_min: 0
      post_max: 7
    delay_after_eq_write: 2
  tx_input_eq_test_config:
    module_list:
      - 3
      - 6
    port_pair_list:
      - tx: "3/0"
        rx: "6/0"
    module_media: "QSFPDD800"
    port_speed: "1x800G"
    lane: 1
    delay_after_reset: 2
    prbs_config:
      polynomial: "PRBS31"
      duration: 2
    tx_input_eq_range:
      min: 0
      max: 12
    delay_after_eq_write: 2

• chassis_ip: the IP address of the chassis

• username: the name used to connect to the chassis and reserve ports

• password: the password used to connect to the chassis

• tcp_port: the port number used to connect to the chassis

• log_filename: the log filename

• rx_output_eq_test_config: the test configuration of RX output equalization optimization

  • module_list: a list of module IDs to test

  • port_pair_list: a list of port pairs

    • tx: the ID (module/port) of the port that transmits PRBS

    • rx: the ID (module/port) of the port that measures PRBS BER

  • module_media: the module media mode to apply

  • port_speed: the port speed mode in the format of <port count>x<port speed>

  • lane: the lane index you want to test, from 1 to 8.

  • delay_after_reset: waiting time in seconds after port reset

  • prbs_config

    • polynomial: the PRBS polynomial to use

    • duration: PRBS BER measurement duration in seconds

  • rx_output_eq_range:

    • amp_min: the minimum amplitude cursor code value

    • amp_max: the maximum amplitude cursor code value

    • pre_min: the minimum pre-cursor code value

    • pre_max: the maximum pre-cursor code value

    • post_min: the minimum post-cursor code value

    • post_max: the maximum post-cursor code value

  • delay_after_eq_write: waiting time in seconds after writing the cursor values

• tx_input_eq_test_config: the test configuration of TX input equalization optimization

  • module_list: a list of module IDs to test

  • port_pair_list: a list of port pairs

    • tx: the ID (module/port) of the port that transmits PRBS

    • rx: the ID (module/port) of the port that measures PRBS BER

  • module_media: the module media mode to apply

  • port_speed: the port speed mode in the format of <port count>x<port speed>

  • lane: the lane index you want to test, from 1 to 8.

  • delay_after_reset: waiting time in seconds after port reset

  • prbs_config

    • polynomial: the PRBS polynomial to use

    • duration: PRBS BER measurement duration in seconds

  • tx_input_eq_range:

    • min: the minimum code value

    • max: the maximum code value

  • delay_after_eq_write: waiting time in seconds after writing the cursor values

Run the Test

Then, run python test.py to start the test. The test log and results will be saved in the log file specified in the test configuration and also printed on the console.

Fig. 1 Test in process

Fig. 2 Test results