I would like to measure the signals for all 4 channels in Test Mode 1. I tried to set the PHY into Test Mode 1 for all channels with the PHY configuration according to SNLA239B Appendix B "1000 Base Test Mode 1".
I am able to measure the Test Signal on channel A but not on the other 3 channels. I also printed the PHY configuration to the terminal and read back the relevant PHY registers with the following results:
Test Mode 1 (all channels)
Setup the PHY with the following values:
register 0x0000001F value: 0x00008000
register 0x00000000 value: 0x00000140
register 0x00000010 value: 0x00005008
register 0x00000009 value: 0x00003B00
register 0x00000025 value: 0x00000480
register 0x000001D5 value: 0x0000F508
Read all relevant configuration registers from PHY:
register 0x0000001F value: 0x00000000
register 0x00000000 value: 0x00000140
register 0x00000010 value: 0x00005008
register 0x00000009 value: 0x00003B00
register 0x00000025 value: 0x00000000 (expected value: 0x00000480)
register 0x000001D5 value: 0x00000000 (expected value: 0x0000F508)
I am wondering, why the registers 0x25 and 0x1D5 are 0.
Where is my fault?
