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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

Is there an NGP antenna suitable for RetevisRT73?

Which NGP antenna suitable for RetevisRT73? MR200 U/V Dual Band NGP Antenna and NMO Mount  ...

Read more  NGP Antenna,  NGP antenna for RetevisRT73

Comparison of Amateur Radio Digital Voice Modes

Understanding the different modes of digital voice can enable amateurs to clearly understand the bandwidth and transmission rate used by the digital voice mode. It can also help us understand which mode is easier to get started and which mode should be experienced in the future.  ...

Read more  Digital Voice,  DMR,  C4FM,  D-Star

What is Radio Direction Finding?

Radio direction-finding is the process of using instruments to determine the direction of radio waves based on the propagation characteristics of electromagnetic waves.   ...

Read more  RDA,  ARDA

How does the TimeSlot Works on RetevisRT73?

How does the TimeSlot Works on RetevisRT73?  ...

Read more  Retevis RT73 DCDM