To enter a frequency on an M802:
Press Clar/RX button and enter frequency with CH and GRP knobs. Be sure top line of screen shows USB. All marine HF frequencies are USB. If screen does not show USB, press SET/Mode to cycle to USB.
Press TUNE button. Listen. If frequency is clear, you can say your boat name and location and "radio check".
To enter a frequency on an M803:
1. Select a channel that is programmed with a frequency near the frequency you want to receive.
2. Push [RX/TX] to select the RX mode.
• The RX icon lights blue.
3. Enter the desired receive frequency using the 4 arrow keys or numeric keypad so 08152.0 for 8152kHz.
For normal Simplex operation, there is no need to set a transmit frequency.
To check reception:
1. try the time frequencies which should be programmed as WWV: 5000 kHz, 10000 kHz, 15000 kHz, 20000 kHz.
2. try the USCG working channels for weather: https://www.weather.gov/marine/uscg_broadcasts
See at bottom of this page an excerpt from the table.
The times in Zulu aka UTC so subtract 4 hrs during EDT, thus 1115Z is 0715 EDT.
3. You are encouraged to do an automated DSC radio check with, by example, USCG Norfolk on 4207.5 kHz. See
SSB DSC Test Calls