Monmouth County Fire

Status
Not open for further replies.

jpb

Member
Premium Subscriber
Joined
Dec 19, 2002
Messages
86
Reaction score
50
I just received an email on this today. (The UHF county hotline)
The current 472 mhz hotline will be taken off the air on May 22 in favor of a new 700 band repeater. According to the email, it looks like a stand-alone 700 repeater with a regular PL of 151.4, not part of the 700 trunk system.
Perhaps I am wrong, but isn't analog prohibited in the 700 Mhz band by FCC rule? That would seem to rule out using PL 151.4.
 

GTR8000

NY/NJ Database Guy
Database Admin
Joined
Oct 4, 2007
Messages
16,694
Reaction score
15,581
Location
BEE00
Perhaps I am wrong, but isn't analog prohibited in the 700 Mhz band by FCC rule? That would seem to rule out using PL 151.4.
Not exactly. Analog is permitted as a "secondary mode", except on the nationwide interop frequencies. There is a trend in NJ of counties using the 700 MHz designated low power frequencies in analog mode for fireground ops.

As with a lot of FCC rules, the language is somewhat unclear, as the first sentence in 90.535(a) reads "All transmitters in the 769–775 MHz and 799–805 MHz frequency bands must use digital modulation.", but then they go on to lay out some exemptions for the use of analog modulation. 90.535(d) states "Transmitters designed to operate on the channels listed in paragraphs (b)(2), (5), (6), and (7) of § 90.531 must be capable of operating in the voice mode at an efficiency of at least one voice path per 12.5 kHz of spectrum bandwidth.", which technically narrowband analog complies with.

https://www.ecfr.gov/current/title-47/chapter-I/subchapter-D/part-90/subpart-R/section-90.535
 
  • Like
Reactions: jpb

Mboy00

Member
Premium Subscriber
Joined
May 9, 2022
Messages
323
Reaction score
41
Location
Aberdeen Township
Not exactly. Analog is permitted as a "secondary mode", except on the nationwide interop frequencies. There is a trend in NJ of counties using the 700 MHz designated low power frequencies in analog mode for fireground ops.

As with a lot of FCC rules, the language is somewhat unclear, as the first sentence in 90.535(a) reads "All transmitters in the 769–775 MHz and 799–805 MHz frequency bands must use digital modulation.", but then they go on to lay out some exemptions for the use of analog modulation. 90.535(d) states "Transmitters designed to operate on the channels listed in paragraphs (b)(2), (5), (6), and (7) of § 90.531 must be capable of operating in the voice mode at an efficiency of at least one voice path per 12.5 kHz of spectrum bandwidth.", which technically narrowband analog complies with.

https://www.ecfr.gov/current/title-47/chapter-I/subchapter-D/part-90/subpart-R/section-90.535
Couldn’t of said it better. Within the shore right now MC Fire Ops 1 is a prime example of this. It works great.
 

policefreak

Member
Premium Subscriber
Joined
Jan 5, 2007
Messages
2,323
Reaction score
334
Location
Berlin, NJ
Couldn’t of said it better. Within the shore right now MC Fire Ops 1 is a prime example of this. It works great.
How is it used? Is it more like a fireground channel? Or is it something you can monitor a few miles from an incident?
 

Mboy00

Member
Premium Subscriber
Joined
May 9, 2022
Messages
323
Reaction score
41
Location
Aberdeen Township
How is it used? Is it more like a fireground channel? Or is it something you can monitor a few miles from an incident?
fire ground yes, but only the paid agencies/the 43 use it on box alarm assignments due to not every agency in the county having 700/800 radios. on a good day I’ve seen it go a few miles.
 

richee2000

Communications. Breaking News. Photography
Banned
Joined
Sep 29, 2014
Messages
2,564
Reaction score
509
Testing of the new hotline last few days. Sounds pretty good.
Is this the 700 MHZ standalone repeater that has been discussed on here? And if so what is the frequency? Or is this a talk group on the p25 system and if so what is the talk group?
 
Last edited:

lion2479

Member
Joined
Mar 5, 2007
Messages
155
Reaction score
11
What is the Law Alert TG used for? Haven't heard anything on this yet. TG: 10002 2712 T Law Alerts
 

richee2000

Communications. Breaking News. Photography
Banned
Joined
Sep 29, 2014
Messages
2,564
Reaction score
509
As stated above it is analog. 771.53125 (PL 151.4)
thank you. is this a single or multi location transmitter ? What is the transmitter site(s) ?
 

rr60

Active Member
Premium Subscriber
Joined
Dec 22, 2005
Messages
2,212
Reaction score
1,231
@richee2000 only cause your special! It is in the DB. Often but not always pulls from the FCC DB. Take a look you can press on the pins for address. This does not guarantee but can indicate a likely site. I know you know how to verify. I then drop pins on my Google Maps of places I verify. Enjoy.

 

richee2000

Communications. Breaking News. Photography
Banned
Joined
Sep 29, 2014
Messages
2,564
Reaction score
509
@richee2000 only cause your special! It is in the DB. Often but not always pulls from the FCC DB. Take a look you can press on the pins for address. This does not guarantee but can indicate a likely site. I know you know how to verify. I then drop pins on my Google Maps of places I verify. Enjoy.

I understand the locations of the sites shown that are part of the P25 trunked System.... Are you saying the stand alone 700 analog hotline channel is located at all of these sites also? I think you are saying they are licensed for all these locations ...seems like we need to verify actual active sites.....yes.. plus this map only shows South Simulcast, I can also see the North sites...
 
Last edited:

richee2000

Communications. Breaking News. Photography
Banned
Joined
Sep 29, 2014
Messages
2,564
Reaction score
509
Monitoring 771.53125 (PL 151.4) in Sea Bright... so far, no activity
 

rr60

Active Member
Premium Subscriber
Joined
Dec 22, 2005
Messages
2,212
Reaction score
1,231
Monitoring 771.53125 (PL 151.4) in Sea Bright... so far, no activity
I suggest no PL. CSQ. Never know if that is correct code. Also you may hear Morse ID with PL stripped.
 
Last edited:

richee2000

Communications. Breaking News. Photography
Banned
Joined
Sep 29, 2014
Messages
2,564
Reaction score
509
I suggest no PL. CSQ. Never know if that is correct code. Also you may here Morse ID with PL stripped.
yup, that is how its in... open , no PL... nearest site to me is Atlantic Highlands
 

rr60

Active Member
Premium Subscriber
Joined
Dec 22, 2005
Messages
2,212
Reaction score
1,231
Oh and suggest 472.7125 at the same time if not already doing that. This way it will be very obvious.
 

Mboy00

Member
Premium Subscriber
Joined
May 9, 2022
Messages
323
Reaction score
41
Location
Aberdeen Township
Also another question for anyone that's up in the county... Just heard 39-21 was redispatched to a MVA that they we're already on scene for when it was x1 injury. Is this a county protocol..?
 

Tech792

Member
Premium Subscriber
Joined
Mar 25, 2003
Messages
3,377
Reaction score
4,868
Location
Central NJ
They were just testing with Shrewsbury around 2 pm. And Holmdel earlier this morning. Like I said, PL is 151.4
 
Last edited:
Status
Not open for further replies.
Top