In addition, the standard frequency difference is 5.7MHz. Within the frequency range of 2.5MHz~20MHz (non-standard), the frequency difference within this range can be produced. Customers need to provide frequency customization. At the same time, the actual parameter index of the duplexer will change with the change of the frequency difference of the duplexer.
Note:
1. When the frequency difference becomes smaller, the insertion loss will become larger and the isolation will become smaller. When the frequency difference becomes larger, the insertion loss will become smaller and the isolation will become larger (the better the performance)
2. The customer customizes the frequency point, and after receiving the goods, (key point, many customer complaints are for this reason)
If the customer needs to debug by himself, the frequency difference of the duplexer cannot be changed (this is the key), and the frequency can only be shifted by ± 3~5MHz.