Add Favorite Set Homepage
Position:Home >> News

Products Category

Products Tags

Fmuser Sites

How to Calculate Distances of FM Transmissions

Date:2019/8/7 9:38:53 Hits:


Items you will need:

* Measurement of the height of the broadcast antenna
* Measurement of the wattage of the radio broadcast


Frequency modulation (FM) is a form of transmitting sound over a small or large distance. Most radio stations use an FM transmission to broadcast their programming to listeners. Short-distance or microbroadcasting FM transmission is used to allow personal MP3 devices to play music through a traditional radio. Calculating the general distance of an FM transmission is relatively easy to do if you know the wattage of the FM broadcast and the height of the antenna.






Calculate the FM transmission range of an omni-directional antenna at 60 to 70 feet in height. A logarithmic formula is used to calculate the loss of a signal strength over a set distance. The basic formula is 10n * log10 (d) + C, where d is the distance of the transmission, n is the path loss exponent and C is a constant. For a broadcast of 6 watts, the transmission range will be 3 miles. At 15 watts, the range increases to 5 miles, at 40 watts to 10 miles and at 100 watts to 15 miles. The general rule of thumb is it will take four times the power to double the transmission distance.

Increase the transmission range of the FM antenna without increasing the power by raising the antenna. Raise the height 10 to 15 yards to significantly increase your broadcast distance. The higher you are able to mount your antenna, the further it will reach.

Take into account the terrain, interference and the type of FM receiver being used. On flat terrain, your transmission will reach farther, as there will be less obstructions. Mountainous terrain can severely limit your broadcast range. If you are broadcasting in or near a big city, interference from more powerful FM transmitters could limit how far your transmission will reach. An FM receiver that uses an outside antenna as opposed to an indoor antenna will have an easier time picking up your broadcast signal.



Maybe you will like:

1.How to Increase FM Transmission Range

2.FMUSER Economic FM Radio Station Studio Package 300w 350w FM Transmitter Cover 15-25km Distance

Leave a message 

Name *
Email *
Phone
Address
Code See the verification code? Click refresh!
Message
 

Message List

Comments Loading...
Home| About Us| Products| News| Download| Support| Feedback| Contact Us| Service

Contact: Zoey Zhang    Web: www.fmuser.net

Whatsapp/Wechat: +86 183 1924 4009

Skype: tomleequan     Email: [email protected] 

Facebook: FMUSERBROADCAST     Youtube: FMUSER ZOEY

Address in English: Room305, HuiLanGe, No.273 HuangPu Road West, TianHe District., GuangZhou, China, 510620    Address in Chinese: 广州市天河区黄埔大道西273号惠兰阁305(3E)