The Retevis Ailunce HS4 10 Meter SSB Ham Radio AM/FM/PA/USB/LSB/CW Mobile Transceiver is a two-way radio headset designed for clear communication in noisy environments. It is commonly used in industries such as security, warehouse management, or any field where workers need to stay in contact without holding a radio. The Retevis HS4 radio typically features a lightweight design, an adjustable microphone, and noise-canceling functionality to improve communication quality.
When using the Retevis HS4 , enabling the DW dual-watch function allows you to simultaneously receive information from two channels, ensuring you do not miss important communication. Here’s how to enable the DW function:
1. Turn the SQ control knob
To enable the DW function, first rotate the SQ control knob clockwise until background noise is eliminated.
2. Select the first and second channel to listen to
Use the CHANNEL SELECTOR knob or the channel selection button on the microphone to select the first channel you want to listen to. Press the DW button, and the DW icon will flash on the LCD screen. Next, select the second channel to listen to using the same method described above.
3. Automatic scanning
Finally, press the DW button again, and the LCD will alternately display the two monitored channels. The Retevis HS4 radio will automatically begin scanning these two channels.
4. Signal detection or transmission
When a signal is detected on one of the channels, the scanning will stop, and communication on that channel can be received. Press the PTT button to transmit on that channel. If no transmission or signal detection occurs within 5 seconds (the recovery time can be programmed via PC software), the radio will resume scanning. When the DW function is enabled, the DW icon will display on the LCD. To exit the DW function, press the DW button or the PTT button.
The type of scanning described above is the SQ mode under the SCA option in the function menu. If the TI mode is selected and a valid signal is detected, the radio will begin scanning again even if no signal is present on the current channel.
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