scosgt
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Interesting thought. Seems unlikely, the SS is only strong when receiving voice. CC signal is OK but not that strong.
State of New York Metro-25 System...
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Interesting thought. Seems unlikely, the SS is only strong when receiving voice. CC signal is OK but not that strong.
A simulcast system will only appear as a single site, in reality it is comprised of multiple subsites that all transmit the same control channel data and voice on the same frequencies simultaneous...hence "Simulcast"
This is the map of the licensed sites for this system:
Site Map: State of New York Metro-25 Trunking System, New York City, New York
Don't be too quick to leap to conclusions. These P25 simulcast systems are a whole different animal than anything else on the air. There is no comparison between this system and the previous EDACS Metro-21 or the NJSP Motorola system. All trunked systems and digital is not created equal.
In addition, most modern P25 systems that are being installed and have been installed recently are using directional panel antennas to focus the signal and keep it within the intended coverage area. Gone are the days of booming omni antennas on trunked systems that put out a strong signal in all directions. If you happen to be outside the intended coverage area and are behind one of these panels, your reception and decoding is going to suffer.
Sometimes less is more with these systems, and if you are close enough to one of the subsites, turning on ATT can help eliminate multipath distortion from the other subsites.
It's also worth pointing out that the NYPD Citywide patch talkgroup 8026 is going to sound kind of crappy anyway, it's a UHF to P25 patch, not a signal native to the system itself.
scosgt
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QUITE interesting. I am around four miles from the site at Creedmore. I should certainly be within the coverage area.
Tomorrow I am working at a site that is less than 1/2 mile (actually 18 blocks, NOT city blocks, rather the short blocks between Avenues) from a site that I know for a fact has handhelds on this system. So I will see what kind of performance I get from there.
Looking at the map, the next closest site in Brooklyn has to be 10 miles away. I would not think there would be that kind of interference.
radioman2001
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"It's also worth pointing out that the NYPD Citywide patch talkgroup 8026 is going to sound kind of crappy anyway, it's a UHF to P25 patch, not a signal native to the system itself."
I'm not sure what the frequency has to do with it, but the cleaner the RX audio is the better it's going to sound analog or P-25. Maybe they are using some sort of hoky audio connection in Eastern's radio shop, but if they use a good audio source it should sound no different than a mobile or console.
I should know more tonight about the audio source, and how it sounds to me at least, as I program up my Astro Spectra and take a listen.
I'm not sure what the frequency has to do with it, but the cleaner the RX audio is the better it's going to sound analog or P-25. Maybe they are using some sort of hoky audio connection in Eastern's radio shop, but if they use a good audio source it should sound no different than a mobile or console.
I should know more tonight about the audio source, and how it sounds to me at least, as I program up my Astro Spectra and take a listen.
The specific frequency has nothing to do with it. I was pointing out that it's a patch from a conventional frequency to a trunked system, not a signal native to the system itself. Substitute the word "conventional" for "UHF" if you want to pick nits.
A patch from a conventional repeater output will never sound as good as a subscriber unit on the system itself. There is always going to be some loss of fidelity and audio quality when you start patching and linking different systems together, especially if it's a repeater output that you are receiving and patching, as opposed to a "clean" source audio.
scosgt
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To expand on this a bit:
I got on the Cross Island at Linden Blvd and as soon as I hit the CIP I got the "T" indicating that I was getting the signal. DISCLAIMER of course I stopped frequently and took the radio out of the trunk and stood on the side of the road to check it. I would never violate NYS scanner in the car laws.
Anyway, as I got closer to Hillside (the Creedmore tower) I got strong signal, but there were no transmissions.
On the way back, south bound I did get signal sometimes, no signal other times. I received one NYS Parks transmission, which I was able to understand - sort of.
Today I worked in Jamaica. I was less than 1/2 mile from two known Metro users - Queens Supreme Court and Queens Civil Court. I can state for a fact from personal knowledge that each building had a Metro 21 EDACS handheld, which did work. As well, the OCA MSP cars had the EDACS handhelds.
So I can not understand how this system works. From the roof of a parking garage, within sight of Queens Supreme Court, I got NO signal on my PSR-800, which is a very sensitive radio on 800 Mhz. The cars sometimes range out to Nassau County, so clearly the users won't get signal either. Their radios are better, but not THAT much better considering the transmit power of a handheld. No way they are hitting a tower I can not even hear!
I don't know if the system is not totally built out or tuned or whatever, but it can not be heard on the Queens/Nassau southern border, nor can it be heard in Jamaica.
I got on the Cross Island at Linden Blvd and as soon as I hit the CIP I got the "T" indicating that I was getting the signal. DISCLAIMER of course I stopped frequently and took the radio out of the trunk and stood on the side of the road to check it. I would never violate NYS scanner in the car laws.
Anyway, as I got closer to Hillside (the Creedmore tower) I got strong signal, but there were no transmissions.
On the way back, south bound I did get signal sometimes, no signal other times. I received one NYS Parks transmission, which I was able to understand - sort of.
Today I worked in Jamaica. I was less than 1/2 mile from two known Metro users - Queens Supreme Court and Queens Civil Court. I can state for a fact from personal knowledge that each building had a Metro 21 EDACS handheld, which did work. As well, the OCA MSP cars had the EDACS handhelds.
So I can not understand how this system works. From the roof of a parking garage, within sight of Queens Supreme Court, I got NO signal on my PSR-800, which is a very sensitive radio on 800 Mhz. The cars sometimes range out to Nassau County, so clearly the users won't get signal either. Their radios are better, but not THAT much better considering the transmit power of a handheld. No way they are hitting a tower I can not even hear!
I don't know if the system is not totally built out or tuned or whatever, but it can not be heard on the Queens/Nassau southern border, nor can it be heard in Jamaica.
scosgt
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I know they are using it. I do receive some transmissions that I can not decode. I don't understand the coverage.
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Yeah - thats what I was wondering about. I notice the P25 system has less talk groups - where do the old ones go?
Also, regarding the "NYPD Citywide Patch" on the new P25 system... how does this differ from the other Citywide Conventional Freq's in terms of use...?
-leaf
The "patch" only goes to Citywide 3 which is a portal for non NYPD LE to get help or notify the city. The only thing I can see happening is a city based NYS trooper or state park ranger calling in on it. Not a frequent event.
what's the modulation type for this I haven't heard anything when I programmed the xts2500 that I personally use
issues monitoring this system
I know is p25 , but I"m having trying programming it to my xts2500, I did exactly RR is posting the info. , but I heard nothing lol is this the right infomation ?
I know is p25 , but I"m having trying programming it to my xts2500, I did exactly RR is posting the info. , but I heard nothing lol is this the right infomation ?
has anyone used a actual MOTOROLA p25 radio ??
Before anyone wastes their time with this guy, I suggest reading these threads to get a sense of what you're dealing with. Best to just ignore him completely.
http://forums.radioreference.com/rants/260215-banned-p25-ca-2.html#post1952535
https://www.p25.ca/threads/2682-Shill-bidding-on-a-whole-new-level
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