P25 Trunking System Questions? How do I hear it all?

[carbon87]

Hello, I'm trying to listen to local LE / Fire / etc on this system:

WyoLink

WyoLink Trunking System, Statewide, Multi-State

WyoLink Trunking System Profile

www.radioreference.com

What I'm confused about is this: I think I'm missing local stuff by monitoring one site. I most certainly don't see talkgroups from outside the county coming through (despite being a statewide system), and at times, I don't see some traffic I'd expect to see locally either. This led me to the theory that only some TGs are being broadcast from some sites at any given time. Is this possible / accurate? If so, is there any way to know which sites I need to add to get complete local coverage? I ask for two reasons:

- When I turn on a bunch of sites in my scanner, the scanning takes so long going between sites that I believe I'm missing calls.
- I also setup a Trunk-Recorder / Rdio instance, and adding a bunch of sites takes a bunch of SDRs and processing, which is prohibitive.

I can't shake the idea that traffic "follows" the use here, and that not everything is being broadcast everywhere despite being a statewide system. Thanks for the assistance with my ignorance in advance!

 

[RaleighGuy]

What I'm confused about is this: I think I'm missing local stuff by monitoring one site. I most certainly don't see talkgroups from outside the county coming through (despite being a statewide system), and at times, I don't see some traffic I'd expect to see locally either. This led me to the theory that only some TGs are being broadcast from some sites at any given time. Is this possible / accurate? If so, is there any way to know which sites I need to add to get complete local coverage?

A statewide system allows use across the state, however you usually only hear traffic affiliated with your particular site. You will not hear all traffic all the time. As far as knowing which sites you need, it is basically trial and error. Start by programming in sites that are about 20 miles around you and listen, see what traffic is on each and keep notes.

- When I turn on a bunch of sites in my scanner, the scanning takes so long going between sites that I believe I'm missing calls.
- I also setup a Trunk-Recorder / Rdio instance, and adding a bunch of sites takes a bunch of SDRs and processing, which is prohibitive.

I can't shake the idea that traffic "follows" the use here, and that not everything is being broadcast everywhere despite being a statewide system. Thanks for the assistance with my ignorance in advance!

Yes, more sites you have programmed the longer it takes to scan, and you will miss traffic when the scanner is listening to control channels out of range.

 

[wtp]

if you could post where you live, it helps.
they might use a local conventional frequency.
also what radio.

 

[carbon87]

A statewide system allows use across the state, however you usually only hear traffic affiliated with your particular site. You will not hear all traffic all the time. As far as knowing which sites you need, it is basically trial and error. Start by programming in sites that are about 20 miles around you and listen, see what traffic is on each and keep notes.

Yes, more sites you have programmed the longer it takes to scan, and you will miss traffic when the scanner is listening to control channels out of range.

Thank you, that's what I was afraid of. Are these transient, or consistent? If they're consistent, I wonder why we don't track that info in the database as well. If they're transient, I guess there's no hope on that front.

if you could post where you live, it helps.
they might use a local conventional frequency.
also what radio.

I am in Cheyenne, and have a Uniden BCD436HP and a Trunk-Recorder/Rdio setup.

 

[wtp]

1 (1)	001 (1)	85 South	Laramie, WY	154.070c	154.1075	154.695	154.845	155.430c	155.5275	155.985
1 (1)	002 (2)	Fox Farm	Laramie, WY	852.2625	852.450	852.700	852.8875	853.300	853.5375c	853.750c
1 (1)	007 (7)	Cheyenne Water Tank	Laramie, WY	161.825	161.850	169.625c	169.7125c	169.775	170.075	170.3625
1 (1)	010 (A)	North Albin	Laramie, WY	154.325c	155.505c	155.820	155.955	156.240
1 (1)	013 (D)	Russell Hill	Laramie, WY	154.010c	154.355c	155.595	155.625	155.670
1 (1)	016 (10)	Whitcomb Hill	Laramie, WY	154.770c	154.830c	154.905	155.0325	155.325	155.700	155.9175
1 (1)	017 (11)	Antelope	Laramie, WY	855.2125	855.4875	855.7375	855.9875	856.4375	856.9375c	857.2125c
1 (1)	018 (12)	Burns	Laramie, WY	856.2625	856.7125	856.9875	857.2625	857.9625c	857.9625	858.4375c
1 (1)	028 (1C)	Archer	Laramie, WY	851.1125	851.300	851.4625	851.625	851.9875	852.1625c	852.350c

after a sort, it seems there is more than one tower in play here.

 

[RaleighGuy]

Thank you, that's what I was afraid of. Are these transient, or consistent? If they're consistent, I wonder why we don't track that info in the database as well. If they're transient, I guess there's no hope on that front.

Transient, typically if a unit travels it is able to affiliate with other towers/sites if allowed by the agency responsible for the set up of the system. It would be virtually impossible to accurately keep track of the thousands of TGs on each state system and what site they are allowed on.

 

[carbon87]

1 (1)	001 (1)	85 South	Laramie, WY	154.070c	154.1075	154.695	154.845	155.430c	155.5275	155.985
1 (1)	002 (2)	Fox Farm	Laramie, WY	852.2625	852.450	852.700	852.8875	853.300	853.5375c	853.750c
1 (1)	007 (7)	Cheyenne Water Tank	Laramie, WY	161.825	161.850	169.625c	169.7125c	169.775	170.075	170.3625
1 (1)	010 (A)	North Albin	Laramie, WY	154.325c	155.505c	155.820	155.955	156.240
1 (1)	013 (D)	Russell Hill	Laramie, WY	154.010c	154.355c	155.595	155.625	155.670
1 (1)	016 (10)	Whitcomb Hill	Laramie, WY	154.770c	154.830c	154.905	155.0325	155.325	155.700	155.9175
1 (1)	017 (11)	Antelope	Laramie, WY	855.2125	855.4875	855.7375	855.9875	856.4375	856.9375c	857.2125c
1 (1)	018 (12)	Burns	Laramie, WY	856.2625	856.7125	856.9875	857.2625	857.9625c	857.9625	858.4375c
1 (1)	028 (1C)	Archer	Laramie, WY	851.1125	851.300	851.4625	851.625	851.9875	852.1625c	852.350c

after a sort, it seems there is more than one tower in play here.

Oh yeah. That's my concern, especially on the SDR side, but also with the scanner trying to scan that many sites and missing calls. Guess it'll be trial and error to see what works.

 

[wtp]

do you only have one radio, and if yes, why ?

i am in favor of more radios.

 

[wtp]

unidens spend about 2 seconds on any trunked system for 'housekeeping' no matter what.
but if there are any that you can't receive normally, don't put them in.

 

[buddrousa]

@carbon87 Here is my setup

my shack 2.jpg

on top 15's next 536's and SDS200 in the middle and my 6 996P2's on bottem

forums.radioreference.com

 

[DVINTHEHOUSEMAN]

Try directly going to those CC's on the sites and only put the sites that come in into your radio as part of the system.

Also, adding an extra talkgroup as a wildcard/ID search just to catch the extra traffic that might be happening would probably be a good idea.