ProSoundWeb Community

Please login or register.

Login with username, password and session length
Advanced search  

Pages: [1]   Go Down

Author Topic: RF Landscape in the NW?  (Read 342 times)

Laurence Nefzger

  • Jr. Member
  • **
  • Offline Offline
  • Posts: 55
  • Kirkland, WA USA
RF Landscape in the NW?
« on: January 29, 2020, 02:59:29 pm »

The northwest has just concluded the FCC mandated DTV transition phase. This period was to be from October 2019 to the middle of January 2020.
I have been following this transition phase carefully as it has affected a number of venues where I do live sound.

I have spent far too much time on the FCC website. I have consulted the FCC complete, presumably, list of where the stations were (before transition) and where they will move to.
My problem:  I perform actual RF scans in the venues I work. What I am finding is that I am still seeing the signature of DTV stations in bands that are supposed to be now clear. And I am not seeing channel bands being utilized by DTV that are listed by the FCC to have stations dedicated to them.
My question: Does anyone have a definitive idea on what the RF landscape is supposed to look like in the 98033 zip code? The FCC site is not giving me the same picture that my RF scans are painting.  Perhaps another question might be is some of the band usage I am seeing in my scans (that is supposed to be clear) a result of analog broadcast entities?
Logged

Ike Zimbel

  • Hero Member
  • *****
  • Offline Offline
  • Posts: 570
  • I'm not a newbie, I just play one on the internet!
    • Zimbel Audio Productions
Re: RF Landscape in the NW?
« Reply #1 on: January 29, 2020, 03:46:10 pm »

The northwest has just concluded the FCC mandated DTV transition phase. This period was to be from October 2019 to the middle of January 2020.
I have been following this transition phase carefully as it has affected a number of venues where I do live sound.

I have spent far too much time on the FCC website. I have consulted the FCC complete, presumably, list of where the stations were (before transition) and where they will move to.
My problem:  I perform actual RF scans in the venues I work. What I am finding is that I am still seeing the signature of DTV stations in bands that are supposed to be now clear. And I am not seeing channel bands being utilized by DTV that are listed by the FCC to have stations dedicated to them.
My question: Does anyone have a definitive idea on what the RF landscape is supposed to look like in the 98033 zip code? The FCC site is not giving me the same picture that my RF scans are painting.  Perhaps another question might be is some of the band usage I am seeing in my scans (that is supposed to be clear) a result of analog broadcast entities?
What your scans are showing you is what the actual landscape is, at the time that you take the scan. What it is supposed to be, based on transition schedules etc is a whole other can of worms. If you are talking about the spectrum above Ch-37 (614-698 MHz), I just last week saw evidence of an active DTV channel AND cellular uplink/downlink activity in that range (in St Louis...I haven't looked at the repack schedule  :-[).
If you are talking about the spectrum below Ch-37, 470-608 MHz, it is not uncommon to have DTV channels called out by a database (like in IAS or WWB, which are derived from the FFC database) that are not actually present. Sometimes this is because they are just not strong enough to get into the venue where you are scanning, and other times it's because the station is simply not on the air. The latter is typically because the channel has been licensed but is not yet broadcasting.
Logged
~Ike Zimbel~
Wireless frequency coordination specialist.
Manufacturer's Representative (Canada)

Radio Active Designs
~416-720-0887~
ca.linkedin.com/pub/ike-zimbel/48/aa1/266

John Sulek

  • Sr. Member
  • ****
  • Offline Offline
  • Posts: 460
  • Toronto Canada
Re: RF Landscape in the NW?
« Reply #2 on: January 29, 2020, 04:58:35 pm »

Try the "387 Viewer" on www.rabbitears.info.
It's under the "Tools" tab then under "Repack Tools". Shows the status of each broadcaster that is moving and if there are any delays due to waiting for new equipment/tower crews/permits/etc.

Seattle is market 13.

As Ike already mentioned above...whatever you see on your location scan is what is happening in that place at that moment no matter what the interweb says.
« Last Edit: January 29, 2020, 05:22:44 pm by John Sulek »
Logged

Pete Erskine

  • Moderator
  • Hero Member
  • *****
  • Offline Offline
  • Posts: 1386
    • Best Audio
Re: RF Landscape in the NW?
« Reply #3 on: January 29, 2020, 05:53:16 pm »

The northwest has just concluded the FCC mandated DTV transition phase. This period was to be from October 2019 to the middle of January 2020.
I have been following this transition phase carefully as it has affected a number of venues where I do live sound.

I have spent far too much time on the FCC website.

Only qay is to do your own scans.  Thw FCC website will never be reality...
Logged
Pete Erskine
917-750-1134
www.bestaudio.com
peter@bestaudio.com

Laurence Nefzger

  • Jr. Member
  • **
  • Offline Offline
  • Posts: 55
  • Kirkland, WA USA
Re: RF Landscape in the NW?
« Reply #4 on: January 29, 2020, 07:13:10 pm »

Try the "387 Viewer" on www.rabbitears.info.
It's under the "Tools" tab then under "Repack Tools". Shows the status of each broadcaster that is moving and if there are any delays due to waiting for new equipment/tower crews/permits/etc.

Seattle is market 13.

As Ike already mentioned above...whatever you see on your location scan is what is happening in that place at that moment no matter what the interweb says.
Thank you for the link to the rabbitears resource. It has been useful because it also lists the Canadian broadcast entities. I suspect the activity I see on channel 22 in my scans may trace back to one of those. We are close enough to British Columbia for them to show up in a scan.
Logged

John Sulek

  • Sr. Member
  • ****
  • Offline Offline
  • Posts: 460
  • Toronto Canada
Re: RF Landscape in the NW?
« Reply #5 on: January 29, 2020, 09:24:14 pm »

Thank you for the link to the rabbitears resource. It has been useful because it also lists the Canadian broadcast entities. I suspect the activity I see on channel 22 in my scans may trace back to one of those. We are close enough to British Columbia for them to show up in a scan.

I would have to look at the Canadian transition, but ch22 was active in the Vancouver BC area last year.
Logged

Ike Zimbel

  • Hero Member
  • *****
  • Offline Offline
  • Posts: 570
  • I'm not a newbie, I just play one on the internet!
    • Zimbel Audio Productions
Re: RF Landscape in the NW?
« Reply #6 on: January 30, 2020, 08:43:01 am »

I would have to look at the Canadian transition, but ch22 was active in the Vancouver BC area last year.
It is, and it's not going anywhere, AFAIK. The only change in Vancouver is that Channel 43 will be moving to 35 in May of this year.
Logged
~Ike Zimbel~
Wireless frequency coordination specialist.
Manufacturer's Representative (Canada)

Radio Active Designs
~416-720-0887~
ca.linkedin.com/pub/ike-zimbel/48/aa1/266

ProSoundWeb Community

Re: RF Landscape in the NW?
« Reply #6 on: January 30, 2020, 08:43:01 am »


Pages: [1]   Go Up
 



Page created in 0.04 seconds with 25 queries.