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All You Need to Know About the Difference Between VHF and UHF

 

  • Which is better? UHF or VHF
  • What do UHF and VHF stand for?
  • Who uses UHF and VHF?
  • How can I improve my signal strength on my VHF or UHF two-way radio?
  • What is the difference between UHF and VHF? Similarities?
  • Is my two-way radio compatible with existing radio systems?

 

Understanding the difference between 2-way radio VHF (very high frequency) and 2-way radio UHF (ultra-high frequency) will help you determine which one is right for you. Every wireless communication, like two-way radios and cell phones, have operating frequencies which is controlled by the Federal Communication Commission (FCC).

To help get a better understanding of UHF and VHF, below are some answers to some frequently asked questions.

 

Which is better VHF or UHF?

Choosing between one or the other depends on what you are going to use them for. VHF is mostly for outdoor use where you are free from obstructions. The frequencies of VHF travel further if they are not disrupted by barriers. The only time you will want to use VHF is if you are outside in a wide-open space like a field. VHF has smaller frequencies which means interference with other radios is common.

UHF, on the other hand, is an all-around better signal for long distance communication. UHF is better when using radios for indoor use like buildings or around cities. A plus to using UHF is you are less likely to be interfered by other two-way radios. The reason why UHF is better for inside use opposed to VHF is, UHF signal does a better job at reaching through wood, steel and concrete, therefore, can reach further into the building.

 

What do UHF and VHF stand for?

UHF stands for “Ultra High Frequency” while VHF stands for “Very High Frequency.” UHF can range from low band (378-512 MHz) to high band (764-870 MHz) while VHF ranges from low band (49-108 MHz) to high band (169-216 MHz). MHz stands for Megahertz and measures the speed of electronic devices.

0.003 MHz- 0.03 MHz

Very Low Frequency (VLF)

.03 MHz – 0.3 MHz

Low Frequency (LF)

0.3 MHz – 3 MHz

Medium Frequency (MF)

3 MHz – 30 MHz

High Frequency (HF)

30 MHz – 300 MHz

Very High Frequency (VHF)

300 MHz – 3,000 MHz

Ultra-High Frequency (UHF)

3,000 MHz – 30,000 MHz

Super High Frequency (SHF)

30,000 MHz – 300,000 MHz

Extra High Frequency (EHF)

 

Who uses UHF and VHF?

UHF is typically used by public safety officials like fire, police, and EMS with tv channels of 77-80. UHF is used for common purposes like phones, televisions, and ham radio operators. Casinos, security officials, warehouses, construction, manufacturing, and health care also use UHF radios to communicate to others across the building and through departments. The frequencies a public safety official use MHz between 849 and 869 and a 13 cm ham radio band has an MHz of 2300 to 1310.

VHF is commonly used for communication on boats and marine personnel. It’s a very important piece to have on board because you can contact nearby boaters when certain emergencies arise. Channel 16 is used when needing to make an emergency call and certain protocol should be followed. Agencies like TSA and CAL FIRE (California Department of Forestry and Fire Protection) use VHF for their two-way radio communications.

How can I improve my signal strength on my VHF or UHF two-way radio?

One way to improve the range on a two-way radio is by improving the antennas. The length of your antenna determines the length of the radio waves. The wavelengths of UHF (ultra-high frequency) are short so antennas for UHF two-way radios are typically small and stubby in size. VHF requires a slightly larger antenna to improve its range and how far it will travel. VHF antennas can receive channels 2 through 13 while UHF antennas can receive channels 14 through 83. Since VHF often gets interfered with other frequencies, the best ways to ensure you don’t get interrupted is to locate where the interference is coming from. On a boat, there are a lot of places the noise can come from. Listen to the receiver and note any changes in noise level. Another way to help with interruptions is bonding. This ensures that the notice goes away to the ground instead of radiated. All motors and such should be constructed in the ground.

An issue that can occur with signals is frequency overlapping. This means that if two radios are using the same frequency then the radio waves interrupt each other, and the transmissions overlap. This will most likely happen when they are in the range of each other or are in the same coverage area. You won’t have any issues with a single transmitter but if you want to cover a large area with multiple transmitters that’s when it becomes difficult because you don’t want them to interrupt each other.

What is the difference between UHF and VHF? Similarities?

The main difference between the two frequencies is the range. UHF two-way radios have a range that is wider than VHF. This means that UHF frequencies have smaller waves that produce a greater range. They are more likely to pass barriers like rock easier. VHFs range is reduced due to signal degradation with barriers such as trees or hills. Together they both reach a good distance. Another difference between UHF and VHF is their battery life. UHF uses a lot of its battery due to the higher frequency. The last difference between the two radios is that UHF does come at a higher cost than VHF. With knowing that, there is a lot of VHF radios that are being compared to UHF with slight differences. 

Is my two-way radio compatible with existing radio systems?

In order to ensure your radio is compatible with existing radio systems make sure you are staying within the same frequency band. If you are using a UHF radio now, your new radio needs to have a UHF operating mode if you want them to communicate. Another way to ensure your radios are compatible is by making sure the current systems are correct. The newer models should be digital, but other models may still be using analog. Lastly, you need to keep in mind that if your radios meet the certain requirements mentioned above, they still may not be compatible. If you are unsure at any time that your two radios are compatible give our partners at First Source Wireless a call and they would be happy to assist in selecting the correct two-way radio. You can find all of First Source Wireless two way radios at https://www.firstsourcewireless.com/harris-macom-two-way-radios

About First Source Wireless:

First Source Wireless mission is to provide optical wireless solutions and products since 2003 and is a Women-Owned Small Business located just outside Washington DC in Eldersburg, Maryland. Call a representative for a free consultation at (800) 806-1076

 

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