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Old 21-May-2018, 10:42 PM   #1
shoman94
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Signal glitch every 18ish seconds on one channel.

I find it hard to believe that it's a signal problem when like clock work it's 18 seconds. Aiming the antenna doesn't fix it.

Thoughts?

AD d4be, AD preamp, SD hdhomerun connects
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Old 21-May-2018, 11:46 PM   #2
ADTech
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What channel (real)?



Do you live in a rural (or semi-rural) location where you or a neighbor might be using an electric fence for livestock, or other critters? Dog containment "invisible" fence?
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Old 21-May-2018, 11:59 PM   #3
shoman94
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Quote:
Originally Posted by ADTech View Post
What channel (real)?



Do you live in a rural (or semi-rural) location where you or a neighbor might be using an electric fence for livestock, or other critters? Dog containment "invisible" fence?

Channel 23 (real)

2.7NM(db) I can move the db4e a good 15 degrees and have the same signal. 90% with signal quality in the 60's.

No dog fences or anything right around me.


EDIT: Right now the signal is peaking at 94% and SQ is high 60's to low 70's.

I do have new 600MHZ tmobile towers in the area.

I just installed an FM filter right in front of my Power inserter and either it helped or the sun going down is helping. If it stays improved I'll move the FM filter at the antenna.

Last edited by shoman94; 22-May-2018 at 12:20 AM.
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Old 22-May-2018, 12:32 AM   #4
Nascarken
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When the sun??

Quote:
Originally Posted by shoman94 View Post
Channel 23 (real)

2.7NM(db) I can move the db4e a good 15 degrees and have the same signal. 90% with signal quality in the 60's.

No dog fences or anything right around me.


EDIT: Right now the signal is peaking at 94% and SQ is high 60's to low 70's.

I do have new 600MHZ tmobile towers in the area.

I just installed an FM filter right in front of my Power inserter and either it helped or the sun going down is helping. If it stays improved I'll move the FM filter at the antenna.
When the sun goes down the earth shrink's and when the sun comes up
Let me gess at about a 11:00 in the morning you loos channel's ??
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Old 22-May-2018, 2:31 AM   #5
rabbit73
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Quote:
Originally Posted by shoman94 View Post
Channel 23 (real)

2.7NM(db) I can move the db4e a good 15 degrees and have the same signal. 90% with signal quality in the 60's.

No dog fences or anything right around me.
Your previous signal report is no longer on the server:
http://www.tvfool.com/?option=com_wr...51347570c1f198

but I think this is pretty close:
http://www.tvfool.com/?option=com_wr...90388487bdc35b

It looks like 23 is WPFO Fox, a 2Edge signal with a NM of -0.2 dB.

Try listening for electrical interference noise on a battery operated portable radio on the AM broadcast band (vacant frequency) or on the VHF aircraft band that is also AM.

my second estimate seems a better match:
http://www.tvfool.com/?option=com_wr...903875419aefe2

but I think the first estimate is correct
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Last edited by rabbit73; 22-May-2018 at 3:07 AM.
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Old 22-May-2018, 3:24 AM   #6
shoman94
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Quote:
Originally Posted by Nascarken View Post
When the sun goes down the earth shrink's and when the sun comes up
Let me gess at about a 11:00 in the morning you loos channel's ??
I never lose the channel.
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Old 22-May-2018, 3:25 AM   #7
shoman94
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Quote:
Originally Posted by rabbit73 View Post
Your previous signal report is no longer on the server:
http://www.tvfool.com/?option=com_wr...51347570c1f198

but I think this is pretty close:
http://www.tvfool.com/?option=com_wr...90388487bdc35b

It looks like 23 is WPFO Fox, a 2Edge signal with a NM of -0.2 dB.

Try listening for electrical interference noise on a battery operated portable radio on the AM broadcast band (vacant frequency) or on the VHF aircraft band that is also AM.

my second estimate seems a better match:
http://www.tvfool.com/?option=com_wr...903875419aefe2

but I think the first estimate is correct
Your first estimate is more accurate but change the height to 25ft.
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Old 22-May-2018, 11:34 AM   #8
ADTech
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I wouldn't expect an FM filter to provide any relief for interference issues up in the UHF band, the math makes that fairly unlikely. Similarly, I also wouldn't expect 600 MHz cellular to cause interference down into channel 23. However, I've been surprised before by things that I hadn't anticipated....



Quote:
... or the sun going down is helping.
If it returns when the sun comes back up, look for a solar-powered anything. If the interference abates during cloudy weather, that might also suggest a solar powered interference source.



Rabbit73's suggestion regarding the AM radio might help, but if the noise is restricted to only one UHF channel, it may not be sufficiently broadband to register down in the AM band. It is worth a try, though.
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Old 22-May-2018, 2:16 PM   #9
Nascarken
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Fm Radio station??

Quote:
Originally Posted by shoman94 View Post
Your first estimate is more accurate but change the height to 25ft.
I think you should probably get an fm filter. and I think it's time for the
Fcc too do a repacking of Fm Radio station way too many of them.
Messing around with are Tv broadcasting channel's. that we have little
Too receive.IT'S about time FCC!!!and if you add 20more ft
To your antenna it will improve your receive and put it on a
45gAGL you will see a big improvement in receiving.
Just try it on your tv Fool report and see for yourself.
The big improvement 45:AGL stands for DgAGL?

Last edited by Nascarken; 22-May-2018 at 2:29 PM.
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Old 22-May-2018, 2:56 PM   #10
rabbit73
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Quote:
Originally Posted by shoman94 View Post
Your first estimate is more accurate but change the height to 25ft.
Thank you. First estimated location now at 25 ft:
http://www.tvfool.com/?option=com_wr...9038fbae7e20d8

Yup, it matches now.



This is a double check with a report from rabbitears.info because the TVFool database has some errors:

Attached Images
File Type: jpg shoman94TVFreportTVF.JPG (135.5 KB, 272 views)
File Type: jpg shoman94TVFreportRE.JPG (176.3 KB, 265 views)
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Last edited by rabbit73; 22-May-2018 at 3:45 PM.
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Old 22-May-2018, 7:54 PM   #11
rabbit73
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You do have two FM transmitters from the ENE only 3.2 miles away, but they don't look like a serious threat because they are not high power.
http://www.fmfool.com/modeling/tmp/2...2/Radar-FM.png
Quote:
Originally Posted by ADTech View Post
Rabbit73's suggestion regarding the AM radio might help, but if the noise is restricted to only one UHF channel, it may not be sufficiently broadband to register down in the AM band. It is worth a try, though.
Yes, worth a try because Fox is much weaker than the rest of your desired channels. Also, if you can borrow a radio that tunes the aircraft band, it is on VHF much closer to TV frequencies.
Quote:
Originally Posted by shoman94 View Post
I find it hard to believe that it's a signal problem when like clock work it's 18 seconds. Aiming the antenna doesn't fix it.

Thoughts?

AD d4be, AD preamp, SD hdhomerun connects
How do you cover so many different directions with just the DB4e?
__________________
If you can not measure it, you can not improve it.
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Last edited by rabbit73; 22-May-2018 at 8:09 PM.
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Old 22-May-2018, 10:50 PM   #12
Nascarken
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DB4,e

Quote:
Originally Posted by rabbit73 View Post
You do have two FM transmitters from the ENE only 3.2 miles away, but they don't look like a serious threat because they are not high power.
http://www.fmfool.com/modeling/tmp/2...2/Radar-FM.png
Yes, worth a try because Fox is much weaker than the rest of your desired channels. Also, if you can borrow a radio that tunes the aircraft band, it is on VHF much closer to TV frequencies.
How do you cover so many different directions with just the DB4e?
You don't just get a real antenna.
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Old 23-May-2018, 1:21 AM   #13
shoman94
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Quote:
Originally Posted by rabbit73 View Post
You do have two FM transmitters from the ENE only 3.2 miles away, but they don't look like a serious threat because they are not high power.
http://www.fmfool.com/modeling/tmp/2...2/Radar-FM.png
Yes, worth a try because Fox is much weaker than the rest of your desired channels. Also, if you can borrow a radio that tunes the aircraft band, it is on VHF much closer to TV frequencies.
How do you cover so many different directions with just the DB4e?
I don't know. I'm aimed at about 10 degrees and attached are the channels I get. This antenna had a pretty wide pattern. I thought about getting a db8e and offset the panels but, it's a bit large.

26 has been giving me some trouble as well coming from the back side.....
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File Type: png Screenshot_2018-05-22-21-06-53-467x845.png (83.9 KB, 35 views)
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Old 23-May-2018, 11:18 AM   #14
Nascarken
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If you are looking for something better go with an rv antenna like the
King Jack 32 dbg.And it is small enough.Or go with Fire tv with 4K ul
Trahd 2017 Edition pendant +HD antenna at Amazon $74.99 or
Indoor/outdoor HDT V antenna range up to 75miles omni directional
360 signals indoor/outdoor includes Amplifier
Supports 8Tv on sale $34.95free shipping.www.Antenna deals.com

Last edited by Nascarken; 23-May-2018 at 1:46 PM.
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Old 25-May-2018, 2:18 PM   #15
rickbb
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Quote:
Originally Posted by shoman94 View Post
I don't know. I'm aimed at about 10 degrees and attached are the channels I get. This antenna had a pretty wide pattern. I thought about getting a db8e and offset the panels but, it's a bit large.

26 has been giving me some trouble as well coming from the back side.....
Did you remove the reflector to allow for reception from the back? If not that may help improve rear reception, but may lower front side gain.

With a 60 degree beam width I have my 4bay aimed slightly off from the main tower directions and it helps pick up all those channels from the side. Similar to what you have done. The 8 bay has more gain but a much narrower beam width, so may not be what you want.
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Old 12-Jun-2018, 9:41 PM   #16
shoman94
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Quote:
Originally Posted by rickbb View Post
Did you remove the reflector to allow for reception from the back? If not that may help improve rear reception, but may lower front side gain.

With a 60 degree beam width I have my 4bay aimed slightly off from the main tower directions and it helps pick up all those channels from the side. Similar to what you have done. The 8 bay has more gain but a much narrower beam width, so may not be what you want.
No I didn't remove the reflector.

@adtech could you show me what the break difference would be if I stayed the db4e sideways?
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