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Do you really understand FM?

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  ...

Read more  WFM,  NFM

Retevis RT72 U/V Dual Band 5W Analog/Digital Walkie Talkie

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.  ...

Read more  Retevis RT72 DMR radio,  Retevis RT72

Do I need to create a RX group list in the CPS?

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. ​  ...

Read more  Rx Group list

Adjust RX/TX Offset (BER) for MMDVM Hotspot

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

Read more  RX/TX offset,  Pistar offset

How to connect a Bluetooth Earphone to Ailunce HD1

If connect a Kenwood 2-pin Bluetooth Earphone to Ailunce HD1, you need to connect a audio adapter firstly.  ...

Read more  Ailunce HD1 Bluetooth Earphone,  Connect a Bluetooth earphone on Ailunce HD1

Retevis RT72 Digital GPS Dual Band DMR Radio

A new DMR model Retevis RT72, it is an upgrade of Retevis RT84, it has GPS function, and supports 130,000 digital contacts.  ...

Read more  Retevis RT72,  DMR GPS radio,  Retevis GPS radio

MiNi 1300 Touch Screen Antenna Analyter

Mini1300 4.3" LCD 0.1-1300MHz HF/VHF/UHF ANT SWR Antenna Analyzer Meter Tester.  ...

Read more  mini 1300 antenna analyter,  Ailunce antenna analyter

Why use the Amplitude Modulation System for the Aairband?

In order to ensure the smooth communication of information, it is guaranteed that the signals sent at the same time can be received, and the amplitude modulation system (AM) is still used in the aviation industry and other industrial communication fields.  ...

Read more  AM Airband,  Why Airband AM system