How to test 1.85 mm Adapter?

In a sense, it is difficult for many companies to test the 1.85 mm adapter through the test board. After all, this requires a lot of manpower and financial resources. For example, you need at least one high-bandwidth network analyzer. Every time you test When you need to play the board, you need an engineer who understands the 1.85 mm adapter test process, etc. But even if your own company does not do this, you must learn to understand the test report provided by the supplier, which is the most basic requirement. Otherwise, you will encounter unpredictable troubles when using the high-speed 1.85 mm adapter.

For example, if the 1.85 mm adapter you choose has a very large crosstalk, then during the design, even if the transmission line is done well, the bit error rate is likely to fail to meet the requirements during product testing. A friend of mine had this happen before. When the first version of the product was developed, it was found that the bit error rate could not pass the specification. I found all the reasons for the product design, including chip, link design, etc., and found that there was no problem. When we found us, we analyzed After reading it again, I feel that there is no problem. The chip is also used by us, and there is no problem with longer distances. When I took a look at their actual product, I found that the high-speed 1.85 mm adapter used was obviously not upgraded. The nominal rate is that high, but in fact there is still a certain amount of moisture. Because the two versions of the connector are completely compatible in physical structure, but because the 1.85 mm adapter has been re-upgraded and designed, the original crosstalk effect has been greatly improved. After replacing the connector later, the product perfectly meets the specification requirements.

                                                      
In many cases, the parameters provided by manufacturers are obtained under the conditions of their design and production. It is recommended for user engineers to use them. Generally, there will not be any major problems. However, if you use different vias or It is because of different materials or different production processes that there may be problems. At this time, if it is verified by the company's own design and production process, it is the safest to have no problems. This method is a very necessary research and development method when making large high-frequency 1.85 mm adapters.