Today, we will check the dual receive function of Retevis RT23. If you have the RT23, You may fell not clear with 35(VOL-MODE). Look the picture bellow.
RT23 has another special functions. It can receiving two signals at the same time. Ordinary radios like BF-F8TH can “watch” two channels. Monitor two different frequencies(even on different bands (VHF/UHF) and the radio will monitor both frequencies giving priority to the first station to receive an incoming call. RT23 not only can “watch” both frequencies, but also can receive two incoming calls at the same time. When we receiving two voice at the same time, we can set the volume mode by the menu 35. “MAIN” indicates the main frequency sound is louder when receiving, “SUB” is indicates the sub frequency sound is louder when receiving. “OFF” indicates both main and sub frequency have same sound.