H-777 How choose bandwidth and narrowband?

The purpose of H-777 broadband and narrowband is to make communication more smoothly and crystal. And know under what circumstances to choose broadband, under what circumstances to choose narrowband.   H-777 broadband and narrowband meaning Broadband and narrowband mean the amplitude of the intermodulation speech modulation onto the carrier. The wideband mode download wave is…

H-777

H-777 How to connect with Repeater Controller?

What’s theTR10 Repeater Controller? In some specific cases, if we need a farther distance,we have to use some tools like Repeater Controller(加C9063A 超链接) to increase the range of the walkie-talkie so that it’s more convenient for our happy communication.But how much do you know about the TR10 Repeater Controller?How long it will extend the range of the radios? The TR10 is a…

H-777

How to make H-777 with RT21 RT-5R compatible?

The necessary condition for Retevis H-777, RT21 and RT-5R compatible is same frequency and same CTCSS. H-777:400-470MHz UHF analog radio RT21:400-480MHz FRS analog walkie talkies RT-5R:136-174/400-520MHz dual band keypad programmable hand-held transceiver Therefore, there is a common frequency range between the three of them. By programming them, they will be changed to same frequency and…