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A cable can pass continuity, mate correctly, and still create unreliable RF measurements. This often happens when a standard production jumper is placed between a signal generator and a device under test. The connection works, but the measured insertion loss changes after the cable is...

A cable can pass continuity, mate correctly, and still be wrong for the enclosure. The problem often appears after installation. The cable is bent more tightly than it was on the bench. The bulkhead body rotates while the nut is tightened. A service loop touches...

The antenna worked on the bench. After the radio was installed inside a metal cabinet, the link became unstable. The first response is often to fit a higher-gain antenna. That may not solve the real problem. If the enclosure, machinery, vehicle body, battery pack, or...

A cable can beep on a continuity tester and still fail when theRF system goes live. The center conductor is connected. The shield is connected. There is no direct short. Yet the radio still shows reflected power, the CCTV picture remains unstable, or the satellite...

A coaxial cable can pass a continuity test and still be damaged during installation. The center conductor remains connected. The shield also appears intact. Yet after the cable is pulled through conduit, secured against a panel, and connected to the antenna, insertion loss rises or...

A coax assembly can pass continuity, fit the enclosure, and still fail after installation. The cable was not terminated incorrectly. The problem began when a small clip flattened the jacket near the connector, forced the cable into a tighter bend, and transferred vibration into the RF port.

A coaxial cable can pass continuity, mate correctly, and still be damaged by the time the equipment cover is closed. This usually happens after the bench sample has already passed. The cable is nearly straight during testing, but production routing is tighter. A clamp moves...

A coaxial cable assembly can pass continuity, look clean under visual inspection, and still fail after installation. The weak point is usually the short transition behind the connector, where a rigid metal body meets a flexible cable. An installer pulls the cable while tightening an...

The sample cable fit perfectly on the open bench. Once the radio was installed inside the enclosure, the SMA coupling nut touched the sidewall, the coax left the connector at the wrong angle, and the installer had to force the cable into place. Continuity still...

A cable can have the correct SMA connectors, pass continuity testing, and still be the wrong part for the RF path. This often happens with an SMA male to female cable ordered only by connector gender and approximate length. The 30 cm sample works on...

A connector can pass a bench test and still fail after it is installed in the enclosure. The free-state PIM result may look stable. The VSWR sweep may also remain within the supplier’s stated limit. Then the connector is tightened into a thin painted panel,...

A short jumper can create a long troubleshooting session. The cable may have the correct 4.3-10 connector, pass a continuity check, and fit between the radio and feeder. After installation, however, the site reports unstable PIM, excessive insertion loss, or a connector that gradually loosens...