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參數(shù)資料
| 型號： | IBM42M10LNYAA10 |
| 廠商： | IBM Microeletronics |
| 英文描述： | 1063 MB/S Gigabit Link Module(1063 MB/S 吉位連接模塊（高性能集成光纖收發(fā)器）) |
| 中文描述： | 1063 MB / s的千兆連接模塊（1063 MB /秒吉位連接模塊（高性能集成光纖收發(fā)器）） |
| 文件頁數(shù)： | 12/26頁 |
| 文件大?。?/td> | 436K |
| 代理商： | IBM42M10LNYAA10 |
IBM42M10SNYAA20
IBM42M10LNYAA10
1063Mb/s Gigabit Link Module - No OFC
IBM Corporation. All rights reserved.
Use is further subject to the provisions at the end of this document.
Page 12 of 26
GLM1063N.02
11/10/99
Isolating Hardware Faults
The following sequence can be helpful in isolating most hardware faults:
1. Check the Link Unusable line. If it is low, then the link is active and this process won’t help.
2. Check the Fault line. If it is high, then the laser or the laser control circuitry is faulty. Replace the GLM.
Note:
The Fault line is known to come on due to probing.
3. Run a set of patterns through the card while in wrap mode (see Enable Wrap (EWrap) on page 9). If
these fail, run through the checks in "Troubleshooting: What If ..." below.
4. Disconnect the cable and insert an optical wrap plug, or a simplex 50-micron optical cable that works
properly. Rerun the same tests you did in line 3 (not in wrap mode). If these fail, the optics are defective.
Replace the GLM.
5. Rerun steps 1 to 4 on the companion GLM. If all tests pass, replace the cable.
Note:
If the tests in line 3 pass, this also verifies that the system and all connections to the GLM are
operating correctly.
Note:
This sequence assumes the use of the Link Acquision Sequence listed on page 11.
Troubleshooting: What If ...
The module does not achieve bit synchronization:
Verify that the transmit and receive frequencies are within 0.01% of each other.
Verify that valid 8B/10B data is being sent on the transmit side. If the transmit side transmits a
01010101010101010101 pattern, the GLM will synchronize the clock to the data stream in the least time.
The module never gets into byte synchronization:
Verify that the Enable Comma Detect line is high so that a Comma Character will reset the shift register.
Verify that the transmitting GLM is getting a correct Comma Character on its Tx[00:09] or Tx[10:19] lines,
but not both.
Note:
A common mistake is switching the order of the lines.
The Fault line comes on:
The laser or its control circuitry is broken. Repeat the power-on sequence to verify the problem.
Note:
The Fault line is known to come on due to probing.
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