El Paso County/Colo Springs DTRS sites

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dw2872

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Instead of making a new thread for each discussion of every event on this county's sites, I'll just start an El Paso County thread. This may be of interest to locals here that monitor the comms on the sites and/or log usage via Pro96Com.

Not commonly known, but DTRS sites do not randomly assign user transmissions to just any channel on the site. There are usually just a handful of frequencies that are used most of the time with others being utilized as load increases and even those are assigned real-time to users in a certain order according to loading. Note: Some sites even reserve certain channels to be used only by certain users such as RTD.

Today, while the radio shop was conducting monthly maintenance and tests on the Stanley Canyon site (4-012), they changed the configuration around a little. They added three new voice channels and changed the CWID (i) channel.

Before today, the Stanley Canyon site had 4 main voice channels used 95% of the time with 6 other overflow voice channels (including 2 DFB channels that are shared with Peterson AFB/Airport DTRS site and used by one site or the other at times of extremely max loading, usually only a few times a week).

Now only 3 out of those 4 original mainly used voice channels plus the 3 new channels make up 6 channels that are used 95% of the time. That 4th previously commonly used voice channel is the new CWID (i) channel and probably used as an overflow voice channel (when agencies are very busy).

The new CWID (i) channel: 851.6750 (which used to be one of the main user channels).
The previous channel the CWID was broadcast on was 853.1000.

These are the three new user channels:

853.7625
857.0125
859.0125

The other three main user channels are:

851.0750
852.0750
852.4000

So again, these 6 user channels above are used equally most of the time. Other channels on this site are overflow channels when loading increases.

Now if only they would add some channels to the Templeton Gap site here that racks up thousands of "busies" a month (from observation, that is mainly from several street maint and bus transport channels chatting about mostly BS with the same priority as public safety fire, EMS, and law enforcement agencies, and it is usually the public safety users that get the busy tones when trying to transmit).
 

dw2872

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I forgot to mention. Stanley Canyon stole one of those new user channels (853.7625) from Austin Bluffs when they did that site's maintenance yesterday.
 

dw2872

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Mike on the ScanElPasoCounty Yahoo group also noticed that 853.100 (the old Stanley Canyon CWID channel before today) is now on the Fountain Valley site.
 

dw2872

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So now that we know that Stanley Canyon, Austin Bluffs, and Fountain Valley all had some changes, it looks like we will have to re-look at all these sites and more just to find out what all changed. I started with Stanley Canyon. Now about Fountain Valley...

The CWID changed. It was WQAD254 (but this callsign was broadcast from 3 locations).

The new CWID broadcast is WPML254.

The CWID channel also changed. It was 854.7125 and now it is on 852.1125 (which used to be one of Fountain Valley's 3 main use channels equally used 95% of the time).

The old 3 main user channels were:

851.3750
852.1125
856.7625

Now they are:

853.1000 (the old CWID and user channel on Stanley Canyon)
854.7125
856.7625

The rest of the freqs are overflow channels when loading increases. 856.9875 is the first overflow channel that gets used when those 3 commonly used ones above are busy.

We should see alot more channel/frequency use and behavior when it gets busy in the daytime tomorrow. I would not be surprised if they work on and add some channels to T-Gap later this week.
 
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Mick

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For this part of the post:

The other three main user channels are:

851.0750
852.0750
852.4000

You may have meant to type 852.075 instead of 851.075. 852.075 is the correct frq, and 851.075 is the iv frq for 4-016 Austin Bluffs site.

Any comments?


Instead of making a new thread for each discussion of every event on this county's sites, I'll just start an El Paso County thread. This may be of interest to locals here that monitor the comms on the sites and/or log usage via Pro96Com.

Not commonly known, but DTRS sites do not randomly assign user transmissions to just any channel on the site. There are usually just a handful of frequencies that are used most of the time with others being utilized as load increases and even those are assigned real-time to users in a certain order according to loading. Note: Some sites even reserve certain channels to be used only by certain users such as RTD.

Today, while the radio shop was conducting monthly maintenance and tests on the Stanley Canyon site (4-012), they changed the configuration around a little. They added three new voice channels and changed the CWID (i) channel.

Before today, the Stanley Canyon site had 4 main voice channels used 95% of the time with 6 other overflow voice channels (including 2 DFB channels that are shared with Peterson AFB/Airport DTRS site and used by one site or the other at times of extremely max loading, usually only a few times a week).

Now only 3 out of those 4 original mainly used voice channels plus the 3 new channels make up 6 channels that are used 95% of the time. That 4th previously commonly used voice channel is the new CWID (i) channel and probably used as an overflow voice channel (when agencies are very busy).

The new CWID (i) channel: 851.6750 (which used to be one of the main user channels).
The previous channel the CWID was broadcast on was 853.1000.

These are the three new user channels:

853.7625
857.0125
859.0125

The other three main user channels are:

851.0750
852.0750
852.4000

So again, these 6 user channels above are used equally most of the time. Other channels on this site are overflow channels when loading increases.

Now if only they would add some channels to the Templeton Gap site here that racks up thousands of "busies" a month (from observation, that is mainly from several street maint and bus transport channels chatting about mostly BS with the same priority as public safety fire, EMS, and law enforcement agencies, and it is usually the public safety users that get the busy tones when trying to transmit).
 

dw2872

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Thanks for the catch, Mick. One of those was wrong but I put a zero instead of an eight.

This is what it should have said for Stanley Canyon (with the correction).

These are the three new user channels:

853.7625
857.0125
859.0125

The other three main user channels are:

851.0750 *** CORRECTION 851.875 ***
852.0750
852.4000
 

radio

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With all these channel changes, the bottom line is the control channel for each sites has not changed so there is no need for any radio reprogramming, correct?

Thanks
 

dw2872

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OK, for those of us that care what frequencies are being transmitted by the sites near us, we need to make a few changes in the RR database. I'll submit proposed changes if nobody objects.

Some of us use SDR to listen to specific frequencies and each SDR device only has a specific usable bandwidth, so knowing the frequencies in use is important for planning purposes.

STANLEY CANYON (4-012)

851.55000 (NO LONGER SEEN ON THIS SITE - NEEDS DELETED - ANYONE KNOW WHAT SITE IT IS ON NOW?)
851.67500
851.87500
852.07500
852.40000
852.61250a
852.85000a
853.10000 (OLD CWID & VX FREQ - NEEDS DELETED - MOVED TO FOUNTAIN VALLEY 4-011 ON DEC 8, 2015)
853.38750a
853.46250 (NO LONGER SEEN ON THIS SITE - NEEDS DELETED - ANYONE KNOW WHAT SITE IT IS ON NOW?)
853.71250c
853.76250 (ADDED DURING SITE MAINTENANCE ON DEC 8, 2015 - NEEDS ADDED TO RR)
857.01250 (ADDED DURING SITE MAINTENANCE ON DEC 8, 2015 - NEEDS ADDED TO RR)
859.01250 (ADDED DURING SITE MAINTENANCE ON DEC 8, 2015 - NEEDS ADDED TO RR)
 

dw2872

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CHEYENNE MOUNTAIN (6-048)

851.05000
851.20000
851.38750a
851.72500a
852.78750a
853.05000c
854.36250
854.66250
855.28750
856.06250
856.66250
856.83750 (NO LONGER ON THIS SITE - MOVED TO QUAIL LOOP SITE 6-039 WHEN INSTALLED)
858.08750 (ADDED TO THIS SITE AS REPLACEMENT FREQ - NEEDS ADDED TO RR DB)
 

Spirit

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El Paso County/Colorado Springs PD/FD

Dan, these are the freq.'s I have for El Paso County & Colorado Springs PD/FD. Do I delete these and just add the 6 freqs you posted? My question is I should get rid of these and put the ones in you listed? TG's range from 4563 to 4956. Did the TG ID's change to?

01 859.987500
02 853.712500
03 859.962500
04 853.825000
05 853.887500
06 859.237500
07 853.737500
08 859.487500
09 859.437500
10 856.237500
11 860.812500
 

Spitfire8520

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Dan, these are the freq.'s I have for El Paso County & Colorado Springs PD/FD. Do I delete these and just add the 6 freqs you posted? My question is I should get rid of these and put the ones in you listed? TG's range from 4563 to 4956. Did the TG ID's change to?

Keep the frequencies that you have. The changes that Dan noted only applies if you need to know the voice frequencies, which is something that all scanners normally ignore. You only need the control channel if you are scanning normally. The talkgroups for Colorado Springs & El Paso County have not changed.
 

greenthumb

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Have you ensured that the site is taking busies before determining that a frequency needs to be removed? Frequencies can be set up as DFB and get used last, so it might take a while before they get seen if the site doesn't get full. Having documented busies at the site is usually the best way to ensure that all* frequencies are in use.
 

Mick

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Hi Dan,

These are confirmed:

851.550 is used at Sites 4-016 & 4-017.

853.100 is used at Site 4-011.

I have the same confirmed freqs for Stanley Canyon:

4-012 Stanley Canyon NAC D12
851.67500 iv "WPTQ260"
851.87500 vd
852.07500 vd
852.40000 vd
852.61250 av
852.85000 av
853.38750 av
853.71250 c
853.76250 vd
857.01250 vd
859.01250 vd

OK, for those of us that care what frequencies are being transmitted by the sites near us, we need to make a few changes in the RR database. I'll submit proposed changes if nobody objects.

Some of us use SDR to listen to specific frequencies and each SDR device only has a specific usable bandwidth, so knowing the frequencies in use is important for planning purposes.

STANLEY CANYON (4-012)

851.55000 (NO LONGER SEEN ON THIS SITE - NEEDS DELETED - ANYONE KNOW WHAT SITE IT IS ON NOW?)
851.67500
851.87500
852.07500
852.40000
852.61250a
852.85000a
853.10000 (OLD CWID & VX FREQ - NEEDS DELETED - MOVED TO FOUNTAIN VALLEY 4-011 ON DEC 8, 2015)
853.38750a
853.46250 (NO LONGER SEEN ON THIS SITE - NEEDS DELETED - ANYONE KNOW WHAT SITE IT IS ON NOW?)
853.71250c
853.76250 (ADDED DURING SITE MAINTENANCE ON DEC 8, 2015 - NEEDS ADDED TO RR)
857.01250 (ADDED DURING SITE MAINTENANCE ON DEC 8, 2015 - NEEDS ADDED TO RR)
859.01250 (ADDED DURING SITE MAINTENANCE ON DEC 8, 2015 - NEEDS ADDED TO RR)
 

Mick

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Hi Dan,

I have the same confirmed freqs that you have:

6-048 Cheyenne Mountain NAC D10
851.05000 ivd “WPTP867” 19Nov2021
851.20000 vd
851.38750 avd
851.72500 avd
852.78750 avd
853.05000 c
854.36250 v
854.66250 vd
855.28750 vd
856.06250 v
856.66250 v
858.08750 v


CHEYENNE MOUNTAIN (6-048)

851.05000
851.20000
851.38750a
851.72500a
852.78750a
853.05000c
854.36250
854.66250
855.28750
856.06250
856.66250
856.83750 (NO LONGER ON THIS SITE - MOVED TO QUAIL LOOP SITE 6-039 WHEN INSTALLED)
858.08750 (ADDED TO THIS SITE AS REPLACEMENT FREQ - NEEDS ADDED TO RR DB)
 
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