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A customer received the first batch of wireless devices and found that the antenna connection was unstable. The connector was correct. The cable length matched the drawing. The supplier had even completed a continuity test before shipment. The problem appeared during RF...

A customer once received an SMA cable assembly that looked correct on the drawing. The connector type matched. The cable length was within tolerance. The continuity test passed. But after the cable was installed into the...

A connector mismatch often looks like a small mechanical problem. An SMA male port does not mate with another SMA male port. A test cable uses the correct frequency range, but the equipment interface is different. A new RF module passes incoming inspection, yet the...

A BNC port can look correct on the bench and still create problems later. A common sourcing mistake happens when a BNC adapter is selected only by appearance. The connector mates, the equipment powers on, and the first measurement seems normal. The issue appears when...

A test setup can look correct and still give a misleading result. A common situation in RF labs is that a new module arrives with an SMA port, while the available test cable or instrument uses BNC. The connection problem seems simple: find an adapter,...

A test cable can look correct, mate correctly, and still create a measurement problem. This happens often when a BNC interface is connected to another RF standard without checking the details behind the connector. The mechanical fit may be acceptable, but impedance, frequency range, and...

The original SMA cable was only 150 mm. The production version needed 500 mm because the antenna had to be moved outside the enclosure. The connector was still SMA, the impedance was still 50 ohms, and the cable looked identical from the outside. The RF...

A customer sends a drawing with only one note: “SMA female connector required.” For a supplier, that description is usually not enough. The interface name tells only part of the story. The final connector may be installed on a PCB, fixed to...

A connector can pass a basic continuity test and still create problems after it enters a finished enclosure. This happens often with panel-mounted RF ports. The connector fits the hole, the SMA interface mates correctly, and the first bench test looks normal. The issue appears...

A connector can look correct on the drawing and still create problems after production starts. A common situation in RF sourcing is this: the prototype cable assembly passes continuity testing, the SMA interface mates normally, and the customer approves the sample. Several weeks later, the...

A cable assembly can pass continuity and still be the wrong RF part. This happens more often than many buyers expect. The connector mates correctly, the cable looks similar to the previous order, and the first sample works on the bench. Problems usually appear later...

A WiFi antenna cable can look correct and still cause trouble after installation. The connector may mate. The continuity test may pass. The antenna may even work during a short bench test. Then the real device goes into a metal enclosure, the cable is bent...