Do not apply excessive DC voltage or current to the test port. An excess of DC voltage or current can cause the instrument to malfunction; do not bend the cable, which will soon cause the cable damage; when the connector is used, it is easy to damage the connector; otherwise, it is easy to damage the connector; the connector is clean to prevent the electrical connection and damage to the connector. The maximum input power of the instrument is 35V, DC 26dBm