VHF or UHF?

[NickNickNick]

Hello!
How can I tell if the control freq's on this page are UHF or VHF?

Monmouth County Public Safety Trunking System, Monmouth County, New Jersey

Monmouth County Public Safety Trunking System Profile

www.radioreference.com

Thanks!

 

[ecps92]

Hello!
How can I tell if the control freq's on this page are UHF or VHF?

Monmouth County Public Safety Trunking System, Monmouth County, New Jersey

Monmouth County Public Safety Trunking System Profile

www.radioreference.com

Thanks!

Neither - they are 700 mHz

VHF High would be 150-174
UHF would be 450-470
UHF T would be 470-512

 

[RaleighGuy]

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.

That said, just want to mention a few things about the system you mentioned above since you are new. This is a P25 Phase 2 simulcast system which most scanners have problems with except the SDS100 and SDS200, or other monitoring devices like a Unication G4 and G5 pager or a SDR Dongle with software like DSD+ Fastlane. Also, in the system if you see TE the talkgroup is encrypted and can not be heard while Te is part time encryption. The T means TDMA or P25 Phase 2. Just wanted to mention this in case you are selecting a scanner or having trouble hearing it.

 

[jwt873]

The frequency 'bands' are defined by the International System of Units (SI) and the International Telecommunications Union (ITU).

VHF is 30 to 300 MHz (10 Meters to 1 Meter)
UHF is 300 to 3000 MHz (1 Meter to .1 meter or 1 cm)

There's a good explanation here ->

Radio Spectrum: ITU Frequency Bands » Electronics Notes

The International telecommunications Union, ITU frequency bands define a set of portions of the radio frequency spectrum: VLF, LF, HF, VHF, UHF, EHF, etc .

www.electronics-notes.com

 

[nd5y]

"Low", "Mid" and "High" bands can mean different things in different industries and user communities.

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).

I don't know where you got some of those limits.
In the LMR and radio hobbyist world VHF low band is 30-50 MHz, VHF mid band (in the US) is 72-76 MHz and VHF high band is 136-174 MHz.

 

[dlwtrunked]

The frequency 'bands' are defined by the International System of Units (SI) and the International Telecommunications Union (ITU).

VHF is 30 to 300 MHz (10 Meters to 1 Meter)
UHF is 300 to 3000 MHz (1 Meter to .1 meter or 1 cm)

There's a good explanation here ->

Radio Spectrum: ITU Frequency Bands » Electronics Notes

The International telecommunications Union, ITU frequency bands define a set of portions of the radio frequency spectrum: VLF, LF, HF, VHF, UHF, EHF, etc .

www.electronics-notes.com

But people want to argue their local or communications segment's own terminology is universal. (I always use the ITU terminology myself.)

 

[NickNickNick]

WOW thanks for all the valuable info!

 

[NickNickNick]

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.

That said, just want to mention a few things about the system you mentioned above since you are new. This is a P25 Phase 2 simulcast system which most scanners have problems with except the SDS100 and SDS200, or other monitoring devices like a Unication G4 and G5 pager or a SDR Dongle with software like DSD+ Fastlane. Also, in the system if you see TE the talkgroup is encrypted and can not be heard while Te is part time encryption. The T means TDMA or P25 Phase 2. Just wanted to mention this in case you are selecting a scanner or having trouble hearing it.

Thanks for this info. I did not see the SDS100/200 on the page APCO Project 25 - The RadioReference Wiki under the Project 25 Phase II Capable Receivers section.

Thanks!

 

[tvengr]

I did not see the SDS100/200 on the page APCO Project 25 - The RadioReference Wiki under the Project 25 Phase II Capable Receivers section.

The SDS100 and SDS200 are the best scanners for both P25 Phase I and Phase II. Many P25 systems use simulcast sites and the SDS100/200 are the only scanners specifically designed to decode simulcast systems. For P25 simulcast, it is a tossup if any other scanner will work depending upon your location in relation to the towers. The SDS100 and SDS200 are the only scanners which will reliably receive my local Baltimore County MD Phase I simulcast system at my home. They are also excellent on the MD FIRST statewide P25 Phase II system as well as the York County PA P25 Phase II system. All of the systems in my area use simulcast sites.

 

[NickNickNick]

The SDS100 and SDS200 are the best scanners for both P25 Phase I and Phase II. Many P25 systems use simulcast sites and the SDS100/200 are the only scanners specifically designed to decode simulcast systems. For P25 simulcast, it is a tossup if any other scanner will work depending upon your location in relation to the towers. The SDS100 and SDS200 are the only scanners which will reliably receive my local Baltimore County MD Phase I simulcast system at my home. They are also excellent on the MD FIRST statewide P25 Phase II system as well as the York County PA P25 Phase II system. All of the systems in my area use simulcast sites.

Excellent! Thank you.
I was close to pulling the trigger on a used G5 but I like the sounds of the SDS100 capabilities. From what I read, audio quality can go either way on both units but I'm used to an ancient Radio Shack handheld so either of these would be an upgrade!
I am in Monmouth County NJ which is all Phase II (supposedly).

 

[tvengr]

The G4 and G5 pagers would work on the Monmouth County system but can scan only one of the sites and a single system at a time. They have excellent decode for P25 Phase 1 and Phase 2 simulcast systems. The G4 receives 700/800 MHz only. The G5 receives 700/800 plus VHF OR UHF, depending on the model. You are also limited to 64 talkgroups on a trunked system and the pagers cannot trunk track the older Motorola Type II systems. The SDS100 and SDS200 give you much more flexibility for scanning multiple sites and systems and also receives both VHF AND UHF. They can also be upgraded to receive DMR and NXDN. It is less expense to upgrade the scanner yourself. You just login to my.uniden.com to purchase the keys. The upgrades already reside in the scanner firmware. You just enter the keys into the scanner to enable them. I am very satisfied with both my SDS100 and SDS200's. In the meantime, I suggest you download and install Sentinel which is free programming software provided by Uniden. http://info.uniden.com/UnidenMan4/BCDx36HPSentinel Which Radio Shack handheld do you have?

 

[NickNickNick]

The G4 and G5 pagers would work on the Monmouth County system but can scan only one of the sites and a single system at a time. They have excellent decode for P25 Phase 1 and Phase 2 simulcast systems. The G4 receives 700/800 MHz only. The G5 receives 700/800 plus VHF OR UHF, depending on the model. You are also limited to 64 talkgroups on a trunked system and the pagers cannot trunk track the older Motorola Type II systems. The SDS100 and SDS200 give you much more flexibility for scanning multiple sites and systems and also receives both VHF AND UHF. They can also be upgraded to receive DMR and NXDN. It is less expense to upgrade the scanner yourself. You just login to my.uniden.com to purchase the keys. The upgrades already reside in the scanner firmware. You just enter the keys into the scanner to enable them. I am very satisfied with both my SDS100 and SDS200's. In the meantime, I suggest you download and install Sentinel which is free programming software provided by Uniden. http://info.uniden.com/UnidenMan4/BCDx36HPSentinel Which Radio Shack handheld do you have?

Thank you for this!
So way back ... I had Pro-34 handheld and a Pro-2004 base station (did the analog cell mod myself). Still have the 2004.
Then I had a Uniden BC-92XLT. As of recently I have just been using my BaoFeng UV-5R.