FM Transmitters

This series contains dozens of affordable FM broadcast transmitters, which works as one of the core series of FMUSER broadcast creations. Most applied in drive-in church and drive-in theater, corporate and groups, regulatory agencies, hospitals, sports industry, national companies, and community radio stations.

 

Who We Are?

 

FMUSER is one of the best radio station equipment suppliers from China with more than thousands of customized radio broadcast solutions are created successfully for individual and commercial radio stations. We engage in the worldwide manufacturing and supply of all kinds of expert radio station equipment, from kilowatts level high power solid-state FM transmitter (AKA: cabinet FM transmitter) to rack-mount FM radio transmitters of few hundred power level. Of course, full packages for FM radio studio are provided  - from audio processors, studio table to studio transmitter link equipment for FM radio station, which includes STL antenna, STL transmitter, and STL receiver along with accessories. FM Broadcast Antennas packages — From the circularly polarized antenna, ground plane antenna, FM dipole antenna, FM antenna for car radio, multi-bay FM antenna for high power FM transmitter (3 bays, 4 bays, 6 bays, and 8 bays are optional), including all kinds of RF antenna feedlines and accessories. 

 

Why FMUSER FM Radio Transmitters?

 

  • Fascinating Hardware Design - As one of the best selling points in exception of its excellent quality in audio display and broadcasting, the hardware design of the FMUSER FM broadcast transmitter, however, has already brought unlimited benefits for our customers all over the world: with a 5-stage power amplification function composed of high-tech electronics, the output stereo effect is ensured. What's more, to ensure the stability of continuous working status, the compact structure design, high-quality aluminum alloy-made shell, built-in air cooling system are provided. An intuitive LCD panel working frequency display with frequency drift close to zero means great broadcasting performance for the buyers.

 

  • Optional Power and Frequencies - You may find the for sale FMUSER broadcast FM transmitter power covering from least 0.1W to more than 1000W, and up to 10kW + at the maximum. And the higher the power, the wider the broadcast, which means those low-cost FM radio transmitters can cover a radius of, for example, more than 30km for a 1000 watts FM transmitter. Honor to say so, FMUSER high power FM transmitter is always the first choice for large FM radio stations. To ensure the quality of audio transmission, we provide high-power FM broadcast transmitter with different power from 2kW to 10kW, which can fully meet the needs of FM broadcasting stations of different scales. FMUSER FM transmitters are durable and can effectively ensure the audio quality for FM broadcasting.

 

  • World Class Manufacturing Factory - Thanks to our FM transmitter factory, we can provide FM broadcast transmitters with strong performance and low cost for buyers of different budgets. In addition, to avoid the negative impact caused by the various environmental factors in a radio engineering room, we applied mostly aluminum alloy, stainless steel, glass and paint as the shell materials and hardware design for the FM transmitter, which can ensure the audio transmitting efficiency and durability.

 

  • Low Cost and High Quality - Due to its high quality and budget price, the FMUSER FM transmitter series is favored by FM radio enthusiasts, radio engineers, and other radio broadcast groups and personnel, and some of them such as 1000 watt and 5000 watt FM transmitters are widely used in applications such as drive-in theater, drive-in church, drive-through nucleic acid detection tests, live events, and various live sports commentary, etc.

 

  • Various Application - It is certain that whether it is for personal or commercial broadcast, you can buy or wholesale radio station equipment of the most favorite from FMUSER. In addition, it is also optional to customize your own broadcast solutions, low-cost FM transmitter station, complete FM transmitter package, etc. 

 

FMUSER FM Broadcast Transmitter Series

 

As we gradually enrich the experience accumulated in the process of manufacturing and selling FM broadcast transmitters, you can contact us and show us your customized requirements to our expert RF team. You can customize from power supply to branding logo. We provide technical support based on your needs. Your actual needs, our moving force.

 

Can't be bad news if you already are or are on your way to be a commercial radio station operator!

How Far Will An FM Transmitter Broadcast ?

Some customers often ask us for some professional radio equipment knowledge, such as “How to build a complete radio station at low cost?”, or “How to choose dipole antenna for my high power FM transmitter? 6-bay dipole antenna or 8 bays?", etc. The interesting thing is, they are much more curious about the range of an FM radio transmitter and have raised so many related questions to our RF engineers. And the following content is part of the frequently asked questions list on FM transmitter range and the corresponding share. We hopefully believe this share on transmitter coverage can help you solve your problems, whether you are one of our customers or not

 

Common questions asked from our customers:

How far can a 1-watt radio transmit?

How far will a 1 watt FM transmitter reach?

How far will a 5-watt FM transmitter go?

What is the 15w FM transmitter range?

How far will a 15w FM transmitter broadcast?

What is the kilometer range of a 15W FM transmitter

What is the FM transmitter range chart?

How far will a 100 watt FM transmitter reach?

How far will a 5000 watt FM transmitter reach?

How far can a 50000 watt FM radio station reach?

How to calculate the FM transmitter range/FM transmitter range calculator?

  

Interesting thing is, when our customers want to know the coverage of our radio broadcast transmitter, we will always state in advance: "You cannot have the accurate number of the coverage range of an FM broadcast transmitter (regardless of power or type), unless you are in the laboratory! "The reason why we can explain this to our customers is that according to the observation of our RF expert team, there is more than one factor affecting the broadcast coverage of the transmitter. Effective radial power (ERP) and the antenna site height above average terrain (HAAT), and many other variables are also important factors we need to consider.

  

Therefore, in order to satisfy our customers with actual answers and help solve practical problems, our RF engineers and sales team usually give some specific numbers. For example, for customers who ask about the coverage of low-power transmitters, we usually say: "15W FM transmitter can cover up to 3k㎡, while 25W FM transmitter can cover up to 5k㎡. If you want to cover a wider range, such as 10k㎡ or 20k㎡, you should choose a 150W or 350W FM broadcast transmitter because they are larger in transmitting power"

  

However, for some radio newbies, these accurate figures may cause unnecessary misunderstandings and push them into thinking factors that will affect the coverage of an FM radio transmitter. Although the corresponding answers are hard-won, we still summarize the following factors that can determine the coverage (which means how far they can go) of an FM transmitter:

  

Hardware-related

1. The broadcast transmitter output power amount (TPO)

TPO is abbreviated from “Transmitter Power Output” in the field of wireless communication, it actually refers to the outputting power produced by a transmitter, if you were told that "This is our top-sales 5kW FM transmitter", then this "5kW" is always seen as the ERP power (Effective Radiated Power) instead of the actual transmitter power. TOP is closely connected with cost, buying, budget, etc., which is mainly because a wider ideal coverage comes with a higher buying price for some of the radio station equipment such as an FM broadcast transmitter and FM radio antennas. Therefore, TOP, together with antenna gain, are two of the most important factors that should be taken into consideration especially in the early period of radio station buildup, when you're deciding which brands and what equipment is best for your budget.

  

2. The Antenna placing height above average terrain (HAAT)

In radio broadcasting, HAAT or EHAAT(effective HAAT), or height above average terrain actually refers to a vertically comparable distance between a transmitting site(transmitter and antenna are included) and the average terrain height among few kilometers. To reach a common understanding of the HAAT key points, one needs to know that HAAT is basically the coverage of a broadcast antenna, it is the vertical position of an antenna site is above the surrounding landscape. Suppose you are standing at a position flush with the installation site of the antenna, at this time, you and the transmitting site are on a plain, then the antenna may reach a tens of kilometers distance for broadcast. If your position is not a plain but a hilly area, the broadcast distance may reach only several of kilometers. HAAT is officially measured in meters, which is widely recognized by international coordination, and of course by regional radio organizations such as the Federal Communications Commission (FCC).

  

This also reminds us that if you want to obtain the maximum coverage when the transmitter, receiver, antenna, and accessories are ready, always remember to place the antenna as high as possible, so as to obtain at least 60% clearance in the Fresnel area and get real RF line of sight (LOS), plus, it helps avoid the negative factors to stop the RF range from expanding, such as the dense trees and high buildings, etc.

  

Note:

1) Due to the lower antenna height, the loss in the RF cable is smaller, and the antenna may work in a better condition at this time, so think of the trade-off between the antenna height and the number of RF cables required.

 

2) After the assembly of hardware broadcasting equipment, please be sure to pay attention to the local radio administration's regulations on antenna height to prevent penalties (in some areas, the penalties for the inappropriate antenna height are quite heavy).

Guidances For Fresnel Zone
Tips Definition to Fresnel Zone in Radio Frequency
Application Physical area
How it generates the transmitter and receiver are at the line of sight
What it belongs:  radio wave
What does it mean? The Fresnel region is between the transmitting and receiving antennas, and the travel difference between the straight path and the broken path of the radio wave is n λ/ 2 is an ellipsoid with the position of the transmitting and receiving antenna as the focus and the straight path as the axis. The size of the ellipse is determined by the operating frequency and the distance between the two stations. In the field of wireless communication, to ensure the best working conditions for the whole system, one thing that matters is keeping a clear elliptical passing area between different antennas on both broadcast sites, making sure there are no limits, no stoppages, no obstructions for the processing.
Why it is important Because any interference or obstacle in line of sight (LOS) may cause signal loss, in point-to-point wireless communication, it is important to keep the line of sight between two wireless systems free of any obstacle

3. Types of antenna and accessories that used in the antenna system types of antenna and coaxial cable used amount of coaxial cable used

  

4. The sensitivity of the FM receiver at the other side

 

Irreversible factors

1. The degree of emptiness in the terrain around the antenna site encumbrance that surrounds the antenna site, such as the density and height of trees or buildings 

2. Type of terrain near the antenna site flat or hilly

3. Radiofrequency interference due to same frequency broadcasting from near radio station

  

The near frequency stations or other radio stations broadcasting in the same frequency, for example, the antenna may be able to see 20 kilometers, but if another station is on the same frequency 20 kilometers away, it will block/interfere with the signal.

 

The truth is: you can never determine the exact coverage of a broadcast transmitter no matter the transmission power or brands it belongs to. Fortunately, you can always obtain the estimated coverage of some radio broadcast transmitters from the RF experts (just as we did earlier).

  

These estimated numbers do goods in actual practice-to help you think twice before choosing a good broadcast transmitter and reduce unnecessary costs or expenses, or be well-referenced in after-sales services or any online technical support after buying an FM transmitter.

  

Of course, we all know that experience is the best teacher. To set up an FM transmitter and run it directly may be the best way to obtain the most accurate coverage of an FM radio transmitter.

  

FMUSER hereby suggests that you can try to use different variables and conduct multiple experimental comparisons, for example, you can:

  

1. Determine the type of antenna (4-bay or 2 bays FM antenna is great)

2. Determine the wielding height of the antenna (30 meters is pretty enough, that equals to a 15 story building)

3. Determine the power of the radio transmitter (you can also change 200 Watts to 500 Watts, and vice versa).

4. Find different sites as the transmitting point (consider whether you are in a flat or hilly area or right on a mountain)

5. Record the farthest broadcast distance you can receive clear radio signals from the transmitting point

6. Change the variables and make comparisons to what you record.

If you find that there is nothing you need in the transmitter coverage reference table provided by us, please let us know the first time. FMUSER can help you estimate the coverage of your radio transmitter.

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