點樣先至係真正既2.4G

點樣先check到2.4G 既要求?
要幾遠?
在咩情況下唔jam ?

唯一要求就係只要信號係每秒2.4G, 就係2.4GHz,
沒有說多遠或者咩情況下唔jam
可用CRO check signal

咁技術性問題, 係要有學術同儀器先可以講解到

簡單講

點樣先check到2.4G 既要求?
ans: 問題唔明確, 可上 internet 搵, 基本上, 2.4G 頻率只係一個統稱, 2.4GHz 只係 carrier freq.,
可以用不同機制, 技術張真正信息傳送

要幾遠?
ans: 兩點之間, 冇阻隔, 理論上無限遠, 要睇輸出功率有多大, 有冇阻隔, 實際睇環境因素

在咩情況下唔jam ?
ans: 理論上, 只要有多餘可使用頻道, 就應該不會俾 jam, 實際上, 要考慮所用技術, 輸出功率等

回復 4# Andrew168


thank you c hing

For any RF system, the golden rule is Signal-to-Noise (S/N) ratio, which as CHING said depends on power and distance.

Generally speaking, for RC cars, you only need a distance that allows you to see and control the vehicle / boat / plane, anything beyond this is (practically) useless.

One note about 2.4GHZ band, it is a license free band and thus shared by many standards, including Bluetooth, WiFi, Microwave Oven and so on, as well as your 2.4 RC gears. Signals from other standards are noises to another. The implication is that if you use your RC gears with another RF system around, like WiFi (esp the new 802.11n wide band), the noise being 'see' by the RC system is greater. Depends on the distance and power, it may give control or pairing troubles, esp if you are next to a powerful WiFi router or working Microwave oven.