Author

Definition of floating function: After the walkie-talkie falls into the water, the fuselage floats on the surface and does not sink into the water.  ...

ARRL is inviting nominations for awards that recognize educational and technological pursuits in amateur radio. Nominations are also open for the League’s premier award to honor a young licensee.  ...

Squelch function is to automatically lock the low-frequency amplifier of the radio during the standby and the interval between calls, so that noise will not be output from the speaker or headphones.  ...

Digital Mobile Radio (DMR) Market is Expected to Grow at a Significant Rate During the Forecast Period 2019 - 2025.  ...

Nowadays,DMR radios become very popular not only in amateur market but also business market. But There are various terms more specific to DMR that could cause some confusion.  ...

in the radio world, UHF and VHF two options can make all the difference when it comes to choosing the right radio for your specific uses. Here are a few facts about UHF and VHF radios – and how to choose between them.  ...

NFM is a narrowband frequency modulation method, which is suitable for communication signals with a channel bandwidth of 25kHz / 12.5kHz; WFM is a wideband frequency modulation method, which is suitable for receiving broadcast signals with a channel bandwidth of about 180kHz  ...

Retevis RT72 is a dual band, dual standby, dual mode compatible--analog/digital cost-effective hand held DMR radio. RT72 is compatible with digital and analog modes, the frequency covers VHF 136-174Mhz and UHF 400-470Mhz. Enough 4000 memory channels, 10,000 digital talk groups, also support import 130,000 digital contacts.  ...

is it necessary to write a Rx group list in the CPS? You can add all your favorite talk groups in one RX group list, also the talk groups with the same time slot in an RX group list. also, make all the talk groups belong to the same country in one RX group list. The principle is you can hear any talk groups that are in one Rx group list but only can transmit to the TX contact associate with the current channel. ​  ...

Is there an agreed upon average RX/TX setting for the DMR Hotspot?  ...