MASCO Trunk

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garys
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MASCO Trunk

#1 Post by garys » 09 Apr 2018 22:58

Found this system a while ago, but there is finally some activity on it. It's located at the N.E. Baptist hospital. 464.6000 is Channel 689 and shows as the control channel. The system also shows Channel 705. MASCO is licensed under WPMR201 for 464.800 and 464.7875. That doesn't match what 705 should be in the forumla.

NEXEDGE96, RAN1. TG1. One user ID shows as "MASCO' alias.

OceanNora
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Re: MASCO Trunk

#2 Post by OceanNora » 10 Apr 2018 11:55

I'm wondering if MASCO stands for Masconomet Schools, as 464.6000 is a frequency on the County Communications system Georgetown site, and NRT runs the Masco Schoolbusses. 464.6000 shows as System 90 (County Communications is listed as Sys90) Site 1 (Site 1 is Georgetown on the County system) on my 436HP in the Boston area, but NXDN is still new to me so I may be way off with that.

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ecps92
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Re: MASCO Trunk

#3 Post by ecps92 » 10 Apr 2018 12:30

MASCO = Medical Academic and Scientific Community Organization for those in the LMA
OceanNora wrote:
10 Apr 2018 11:55
I'm wondering if MASCO stands for Masconomet Schools, as 464.6000 is a frequency on the County Communications system Georgetown site, and NRT runs the Masco Schoolbusses. 464.6000 shows as System 90 (County Communications is listed as Sys90) Site 1 (Site 1 is Georgetown on the County system) on my 436HP in the Boston area, but NXDN is still new to me so I may be way off with that.

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ecps92
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Re: MASCO Trunk

#4 Post by ecps92 » 10 Apr 2018 12:30

ecps92 wrote:
10 Apr 2018 12:30
MASCO = Medical Academic and Scientific Community Organization for those in the LMA
http://www.scan-ne.net/wiki/index.php?title=MASCO_LTR
OceanNora wrote:
10 Apr 2018 11:55
I'm wondering if MASCO stands for Masconomet Schools, as 464.6000 is a frequency on the County Communications system Georgetown site, and NRT runs the Masco Schoolbusses. 464.6000 shows as System 90 (County Communications is listed as Sys90) Site 1 (Site 1 is Georgetown on the County system) on my 436HP in the Boston area, but NXDN is still new to me so I may be way off with that.

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garys
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Re: MASCO Trunk

#5 Post by garys » 10 Apr 2018 13:53

MASCO has been the sort of a facilities maintenance consortium for the Longwood Medical Area (LMA) hospitals and Harvard Medical School for at least 30 years. There is a large MASCO power plant that I think exists to keep the lights on at the hospitals if the power grid goes out.

I haven't looked a Bill's link, but I'm sure they do other things as well.

The transmitter site is at the Baptist on Parker Hill. There are a lot of transmitters on Parker Hill because it has great elevation. I'm surprised that there is only one active TG, but they might be phasing it in slowly.

If I can nail down the actual frequency of Ch. 705, then I'll post something more formal on the Suffolk County College and Hospital wiki page.


OceanNora wrote:
10 Apr 2018 11:55
I'm wondering if MASCO stands for Masconomet Schools, as 464.6000 is a frequency on the County Communications system Georgetown site, and NRT runs the Masco Schoolbusses. 464.6000 shows as System 90 (County Communications is listed as Sys90) Site 1 (Site 1 is Georgetown on the County system) on my 436HP in the Boston area, but NXDN is still new to me so I may be way off with that.

OceanNora
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Re: MASCO Trunk

#6 Post by OceanNora » 10 Apr 2018 14:56

Interesting, I had the MASCO analog LTR in my scanner a few years ago and never heard any traffic that I recall. Any idea as to why my scanner is adamant that it's System 90?

cdgordon
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Re: MASCO Trunk

#7 Post by cdgordon » 10 Apr 2018 15:06

464.8000 should be 705
464.7875 should be 704

Once you find one channel and it is not a simple 1, 2, 3, 4..., I usually put it into an Excel spreadsheet and calculate a table of Freq/Channels. Makes it easier to recalculate with new values.
If 464.6000 is Ch 689, simply take 464.6000 and subtract a suspected base, in this case 461.0000. that leaves 3.6000 which is divided by the step, 12.5. That is 288. 689-288 is 401. Therefore 401 and 461.0000 are the base.

You can also do some field math and come up with it in this case.
705-689=16 16*.0125 is .2000 464.6000+.2000=464.8000

chris

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garys
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Re: MASCO Trunk

#8 Post by garys » 10 Apr 2018 19:34

That's what I got as well, however they are licensed for 464.7875, but not 464.800. Of course that doesn't always mean much.

I've used Eric's formula on RR with some success, but in this case both came out 1Mhz lower than the actual frequency.

I've also found that the formulas aren't always exact.

Your examples are different ways to do it, so I'll try those as well.

And of course any channel number above 800 and all bets are off.

Ocean Nora, I don't know why this system shows as 90-1. A guess, and it's only a guess, is that that is some sort of default setting and for a non networked site, it doesn't really matter as long as the subscriber radios all recognize it. OTOH, I have County Communications site 90-1 in my DSD Frequencies file and sometimes when I"m on the MASCO system it shows all of the frequencies for both sites.

The system is not very busy and for some reason I always seem to be out of the room or have the audio muted when TG 1 pops up. As with all of these new digital systems, checking in from time to time might show increasing activity.

I post this stuff in case anyone else with DSD+ is within range and might be interested in tuning in.


cdgordon wrote:
10 Apr 2018 15:06
464.8000 should be 705
464.7875 should be 704

Once you find one channel and it is not a simple 1, 2, 3, 4..., I usually put it into an Excel spreadsheet and calculate a table of Freq/Channels. Makes it easier to recalculate with new values.
If 464.6000 is Ch 689, simply take 464.6000 and subtract a suspected base, in this case 461.0000. that leaves 3.6000 which is divided by the step, 12.5. That is 288. 689-288 is 401. Therefore 401 and 461.0000 are the base.

You can also do some field math and come up with it in this case.
705-689=16 16*.0125 is .2000 464.6000+.2000=464.8000

chris

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ScanBoston
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Re: MASCO Trunk

#9 Post by ScanBoston » 10 Apr 2018 20:40

They also have contracts with private parking lots all over the Fenway area and run a fleet of buses that drive the nurses and the doctors from the hospitals to the parking garages.

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garys
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Re: MASCO Trunk

#10 Post by garys » 11 Apr 2018 11:33

I caught some activity this morning. FMP-VC went to 464.800, but there was no voice there. So, it seems that the programming is fine. I don't know if the power level is just too low for me to receive 464.800 or if the frequency just isn't accurate.

Some monitoring closer in to Parker Hill is in order.

Gary

cdgordon
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Re: MASCO Trunk

#11 Post by cdgordon » 11 Apr 2018 11:57

Did you try simply putting 464.7875 in as channel 705? Even though the band plan would be off, I thing DSDPlus and a scanner would go to whatever you put in for channel number.

chris

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garys
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Re: MASCO Trunk

#12 Post by garys » 11 Apr 2018 14:29

I did try that and got nothing. There is a different NXDN trunk close by that is between 7875 and .800. That's a 4800 system, but might just be blocking the signal. I'll get a better idea when I can sit on the MASCO system closer in.

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garys
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Re: MASCO Trunk

#13 Post by garys » 11 Apr 2018 18:38

A couple more pieces of the puzzle. I started to get voice on 689, apparently when 705 (where that is) was busy. So, 689 is acting as a composite channel. Aliases of BID MC (Beth Isreal), Mass Art (Mass College of Art) and one other that was incomplete. All on TG 1. There might have been another TG that I missed. In fact, there just about has to be.

DSD_VC was active with 705, but again I don't know if the frequency is right or not.

I might get a chance to go closer in tomorrow.

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