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What is the difference between roaming and scanning of the walkie-talkie?

Roaming refers to setting the radio to automatically move between them according to which repeater has a strong signal.  ...

Read more  Roaming,  Scanning

Why is necessary to set the squelch level?

Walkie-talkies communicate with each other by radio signals. Different from wired communication, background noise will inevitably appear in radio communication. This kind of noise is tiresome and causes auditory interference and fatigue to users. The purpose of setting the squelch level is to control the influence of back noise.  ...

Read more  Squelch level,  Ailunce HD1

What's QPSK modulation?

QPSK is short for Quadrature Phase Shift Keying or called four-phase shift keying. and it is a digital modulation. Do you know how QPSK works?  ...

Read more  QPSK,  Modulation,  Amateur Radio

How to set up FM satellite communication channels

The common satellites use FM transponders, so a simple FM walkie-talkie can realize FM satellite communication. So what should be paid attention to when setting up an FM satellite communication channels?  ...

Read more  Amateur Radio,  FM satellite

What is the Difference between CTCSS and DCS on Two-Way Radios?

When using two-way radios or walkie-talkies, we all use CTCSS/DCS or Motorola system PL tones or DPL.  It is divided into CTCSS and DCS. Both CTCSS and DCS are all used on analog two way radios. Do you know what is the difference between CTCSS and DCS?   ...

Read more  CTCSS and DCS,  difference between CTCSS and DCS

Why use Temperature Control Fan on RetevisRT73?

Retevis RT73 temperature-controlled cooling fan can control the air pressure and air volume of the fan through the temperature change in the vehicle-mounted station to achieve the effect of energy saving.  ...

Read more  RT73 temperature control fan,  Retevis RT73

How to set Ailunce HS1/HS1 PLUS in WSJT-X

Ailunce HS1/HS1 PLUS is an SSB HF SDR ham transceiver, so we can use some computer third-party software, such as WSJT-X,and so on. today we'll show some key settings for Ailunce HS1/HS1 PLUS in WSJT-X.  ...

Read more  Ailunce HS1,  WSJT-X,  SDR Tranceiver

The Actual Communication Distance of the Digital Walkie Talkie

Because ultrashort wave communication is a line-of-sight transmission method, data signals are affected by buildings, hilly terrain, and trees, and electromagnetic waves are blocked and affected, which affect the facts.  ...

Read more  Communication Distance

What Role does Shortwave Communication play in Wireless Communication?

Shortwave is the originator of radio. When the radio was invented, the transmission method was shortwave. In modern times, the frequency band used by radio has expanded to ultrashort wave, microwave, and even higher, but short wave still plays an extremely important role.   ...

Read more  Shortwave,  emergency communications