i keep getting answers about reception of nj state system and nj state pd but no valid explanation of why a system that worked perfectly for many years on multiple scanners just stopped working can anyone explain a valid reason except where i live?
nj interopability
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My hunch is that the OP was originally monitoring the 4.1 system, which had slightly better propagation outside the intended coverage area than the ASTRO 25 system. Of course he's always vague with details, so who knows.
Yes. The NJSP doesn’t want you, specifically you up in sloataburg listening to the system.
Have you contacted the state and asked them? OTOH, maybe it isn't designed to work where you live.
wtp
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many places seem to be trying to confine their signals to just their own area.
that way someone can reuse the frequency/s closer.
when you only have a given amount of frequencies, you have to do something.
years ago i could hear Hackensack Medical Center when crossing into Pennsylvania.
so 155.175 was basically theirs.
that way someone can reuse the frequency/s closer.
when you only have a given amount of frequencies, you have to do something.
years ago i could hear Hackensack Medical Center when crossing into Pennsylvania.
so 155.175 was basically theirs.
Yes, here are the reasons why you can no longer hear them:
- The NJSP Motorola TRS (trunked radio system) operating in the 800 MHz range was taken out of service earlier this year due to it being functionally obsolete for today's communication standards. The system was first put into service sometime around 1985, and parts for maintaining the system were no longer available or manufactured. Motorola also ended support for that type of trunking (P16 standard) several years ago. This forced the State to upgrade to the P25 digital trunking protocol/standard that many other agencies around the world are currently or have done already. P25 voice and infrastructure have many more advantages for fulfilling todays Mission Critical standards that Public Safety (Police/Fire/EMS/Public Works/Utilities) rely upon in their respective fields of work that could not be fulfilled in an analog system.
- Most P25 systems in place now require that the frequencies used on a system, especially a large system such as the State of NJ, to reuse the same frequencies several times within the system coverage area. Thus, the power output that the old system was able to do is no longer applicable and power had to be reduced. Also, directional antennas for specific coverage areas had to be implemented. So the old tower in Ramapo at 800 MHz was putting out "x" amount of power for coverage. Now, with the P25 system (NJ ICS 700 MHz), "z" amount of power is being put out, along with the fact that the antennas are not all-directional as in the past, but now specific-directional for today's standards. The frequencies for today's standards cannot go out of a certain range on a regular basis. Atmospheric conditions aside, they must stay within a specific range coverage area. Since New York State is not part of the regular coverage area, there is no need for the NJ State Police to have coverage in Sloatsburg, NY.
Refer to this map https://nj.gov/njsp/njics/pdf/NJ_Statewide_POS_Map_RT-1.pdf for coverage areas based on a Motorola APX8000 portable radio. You will see that NY State is not intended for coverage with the NJICS 700 MHz system.
Hope this helps you understand why you can no longer receive the NJSP or NJICS system.
- The NJSP Motorola TRS (trunked radio system) operating in the 800 MHz range was taken out of service earlier this year due to it being functionally obsolete for today's communication standards. The system was first put into service sometime around 1985, and parts for maintaining the system were no longer available or manufactured. Motorola also ended support for that type of trunking (P16 standard) several years ago. This forced the State to upgrade to the P25 digital trunking protocol/standard that many other agencies around the world are currently or have done already. P25 voice and infrastructure have many more advantages for fulfilling todays Mission Critical standards that Public Safety (Police/Fire/EMS/Public Works/Utilities) rely upon in their respective fields of work that could not be fulfilled in an analog system.
- Most P25 systems in place now require that the frequencies used on a system, especially a large system such as the State of NJ, to reuse the same frequencies several times within the system coverage area. Thus, the power output that the old system was able to do is no longer applicable and power had to be reduced. Also, directional antennas for specific coverage areas had to be implemented. So the old tower in Ramapo at 800 MHz was putting out "x" amount of power for coverage. Now, with the P25 system (NJ ICS 700 MHz), "z" amount of power is being put out, along with the fact that the antennas are not all-directional as in the past, but now specific-directional for today's standards. The frequencies for today's standards cannot go out of a certain range on a regular basis. Atmospheric conditions aside, they must stay within a specific range coverage area. Since New York State is not part of the regular coverage area, there is no need for the NJ State Police to have coverage in Sloatsburg, NY.
Refer to this map https://nj.gov/njsp/njics/pdf/NJ_Statewide_POS_Map_RT-1.pdf for coverage areas based on a Motorola APX8000 portable radio. You will see that NY State is not intended for coverage with the NJICS 700 MHz system.
Hope this helps you understand why you can no longer receive the NJSP or NJICS system.
Now, why would anyone want to do that?
So they could listen in on NJSP radios....
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