Checks the signal path for the receiver and local oscillator stability.

Test the transmitter using a verified 50-ohm dummy load. Check the 15V switching command sent from the transceiver to the external antenna tuner.

The Samyung SRG-1150DN is a high-power MF/HF marine transceiver designed to meet the stringent requirements of the Global Maritime Distress and Safety System (GMDSS). It is an all-in-one communication solution that integrates a 150W MF/HF transmitter, a high-sensitivity receiver, a built-in DSC (Digital Selective Calling) watch-keeping receiver, and distress alarm telephone capabilities. When connected to the optional SN‑100 NBDP (Narrow Band Direct Printing) terminal, it unlocks advanced TELEX and data communication functions, making it a versatile and reliable choice for vessels operating in GMDSS Sea Areas A2, A3, and A4.

Choose [1. Tuning Clear] , toggle the selection to Yes , and press [ENT] . This purges all automatic antenna tuner memory presets and forces a hard system reboot.

Apply a stable DC 24V source to the primary power input terminals.