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Showing results 126 to 150 of 500
Search took 0.04 seconds; generated 98 minute(s) ago. Search: Posts Made By: rabbit73
Forum: Help With Reception 14-Sep-2020, 6:09 PM
Replies: 90
Views: 526,646
Posted By rabbit73
It still functions. I get ghost spikes now is...

It still functions. I get ghost spikes now is the problem.

SNR meter plugin is a non-issue. As mentioned previously, the ghost spikes occur on completely separate machines with their own...
Forum: Help With Reception 13-Sep-2020, 7:53 PM
Replies: 90
Views: 526,646
Posted By rabbit73
The only dB scale on an SDR that I have...

The only dB scale on an SDR that I have confidence in is the dBm calibrated scale for the RSP1a with SDRuno software. I used it during the above test.

https://i.imgur.com/I2S4W8l.jpg
...
Forum: Help With Reception 13-Sep-2020, 6:51 PM
Replies: 90
Views: 526,646
Posted By rabbit73
Using an Attenuator to Measure the Strength of a Digital TV Signal

Here is an example of using an attenuator to measure the strength of a digital TV signal. I picked RF channel 20 to measure.

https://i.imgur.com/IVd22XT.jpg

This is my signal report in dBm:...
Forum: Help With Reception 13-Sep-2020, 4:24 AM
Replies: 90
Views: 526,646
Posted By rabbit73
I am working on a method of measuring the...

I am working on a method of measuring the strength of a TV signal using only the TV tuner and an attenuator. It should help verder to be able to measure the strength of his strongest signal which...
Forum: Help With Reception 12-Sep-2020, 11:41 PM
Replies: 90
Views: 526,646
Posted By rabbit73
There appears to be spurs in all three of my...

There appears to be spurs in all three of my scanners, but it's not unexpected in equipment that isn't lab grade. I would need a pure source to really tell the spurs from actual signals.

The...
Forum: Help With Reception 12-Sep-2020, 2:23 AM
Replies: 90
Views: 526,646
Posted By rabbit73
That tells you the attenuator is making the...

That tells you the attenuator is making the signals weaker, but you don't yet know if reducing the signal strength reduces the dropouts and pixelation.
Forum: Help With Reception 12-Sep-2020, 1:55 AM
Replies: 90
Views: 526,646
Posted By rabbit73
You tried an attenuator, and it didn't help with...

You tried an attenuator, and it didn't help with the ghost artifact or dropouts, did it? You could try more attenuation.

There are two CM LTE filters with the same model number CM-3201. You would...
Forum: Help With Reception 12-Sep-2020, 12:16 AM
Replies: 90
Views: 526,646
Posted By rabbit73
The Mediasonic is telling you the truth. ...

The Mediasonic is telling you the truth.

When it goes to 0% signal quality, there are more errors than the FEC (Forward Error Correction) is able to correct. The FEC has a limit to its ability to...
Forum: Help With Reception 11-Sep-2020, 8:17 PM
Replies: 90
Views: 526,646
Posted By rabbit73
Thank you. 73 post by majortom about 1/4...

Thank you.
73

post by majortom about 1/4 wave stubs
use 7th harmonic
https://www.digitalhome.ca/threads/on-hamilton-stoney-creek-brantford-haldimand.36535/post-3109007
Forum: Help With Reception 11-Sep-2020, 7:45 PM
Replies: 90
Views: 526,646
Posted By rabbit73
Good to hear from you. The OP and I are both...

Good to hear from you.

The OP and I are both interested in SDRs as a diagnostic tool. I see no harm in a brief response.

The dynamic range of the SDR is determined by the bit depth of the ADC...
Forum: Help With Reception 11-Sep-2020, 3:21 AM
Replies: 90
Views: 526,646
Posted By rabbit73
Measuring Signal Margin to Dropout

When digital TV arrived, I was looking for an inexpensive way to measure the strength of digital TV signals. Signal level meters are made for the task, but they cost more than most people want to...
Forum: Help With Reception 11-Sep-2020, 1:11 AM
Replies: 90
Views: 526,646
Posted By rabbit73
Your comments about the Mediasonic converter box...

Your comments about the Mediasonic converter box made we wonder about how it would compare with the HDHR at weak-signal dropout.

Tyler the Antenna Man did two reviews about converter boxes, the...
Forum: Help With Reception 10-Sep-2020, 7:26 PM
Replies: 90
Views: 526,646
Posted By rabbit73
I owe you an apology. I have been dumping a lot...

I owe you an apology. I have been dumping a lot of technical information on you without knowing your background, but you seemed to be interested in learning more.

I should have shown the math to...
Forum: Help With Reception 10-Sep-2020, 3:04 PM
Replies: 90
Views: 526,646
Posted By rabbit73
Good point. I would hope that the...

Good point.

I would hope that the engineers that wrote the ATSC specs took that into consideration, but maybe they didn't.

This part was added by holl_ands, who does modeling and is an RF...
Forum: Help With Reception 9-Sep-2020, 11:17 PM
Replies: 90
Views: 526,646
Posted By rabbit73
Yes, unfortunate. If it had a GUI that gave that...

Yes, unfortunate. If it had a GUI that gave that information, more peole would buy it.

Indeed.

To give you a feeling for signal levels, here is your report in dBm:...
Forum: Help With Reception 9-Sep-2020, 6:46 PM
Replies: 90
Views: 526,646
Posted By rabbit73
That IS interesting. How did they know how strong...

That IS interesting. How did they know how strong your signals are, did you give them a signal report?
https://www.rabbitears.info/searchmap.php?request=result&study_id=143302
...
Forum: Help With Reception 8-Sep-2020, 2:17 AM
Replies: 90
Views: 526,646
Posted By rabbit73
Thank you for the images and the detailed...

Thank you for the images and the detailed explanation.

https://i.imgur.com/BBrbazI.jpg

https://i.imgur.com/UO1EckC.jpg

https://i.imgur.com/AzQcUvN.jpg


It appears to be an artifact that...
Forum: Help With Reception 7-Sep-2020, 3:41 PM
Replies: 90
Views: 526,646
Posted By rabbit73
Sorry, I got a little ahead of you. I like my...

Sorry, I got a little ahead of you. I like my HDHR4-2US (the gray one); I avoided the 4-tuner models.

The signal quality reading from your MediaSonic tuner should help. At what percent reading...
Forum: Help With Reception 6-Sep-2020, 6:50 PM
Replies: 5
Views: 21,048
Posted By rabbit73
You are doing it just the way I do it. I don't...

You are doing it just the way I do it. I don't know of an easier way. It's not possible to see a change in the scan as you change the gain because it takes time for the scan to assemble the...
Forum: Help With Reception 6-Sep-2020, 3:14 PM
Replies: 90
Views: 526,646
Posted By rabbit73
It doesn't take a lot of time to post your...

It doesn't take a lot of time to post your messages, but it does take a lot of my time to think of useful answers. However, I find your reception problem interesting and I always learn something new...
Forum: Help With Reception 6-Sep-2020, 3:24 AM
Replies: 5
Views: 21,048
Posted By rabbit73
http://forum.tvfool.com/attachment.php?attachmenti...

http://forum.tvfool.com/attachment.php?attachmentid=3865&d=1599358875

There are no more high power TV signals in channels 39, 40, and 41, so it is probably cellular signals. There are, however, a...
Forum: Help With Reception 6-Sep-2020, 1:34 AM
Replies: 5
Views: 21,048
Posted By rabbit73
The gain setting is too low. You must increase...

The gain setting is too low. You must increase the gain until the noise floor just starts to rise, and then stop there.

http://forum.tvfool.com/attachment.php?attachmentid=3861&d=1599352521
...
Forum: Help With Reception 5-Sep-2020, 11:22 PM
Replies: 90
Views: 526,646
Posted By rabbit73
Using the pilot is certainly helpful in finding a...

Using the pilot is certainly helpful in finding a channel, but the strength of the pilot is not a reliable measurement for the strength of the channel. Multipath reflections can affect the strength...
Forum: Help With Reception 5-Sep-2020, 10:56 PM
Replies: 90
Views: 526,646
Posted By rabbit73
The 2MAX does have a wider beamwidth than the...

The 2MAX does have a wider beamwidth than the 4MAX, and less gain on axis. It also probably has less gain than a 4-Bay.
Forum: Help With Reception 5-Sep-2020, 10:51 PM
Replies: 90
Views: 526,646
Posted By rabbit73
Sounds like you have some interesting experiments...

Sounds like you have some interesting experiments planned.
Showing results 126 to 150 of 500
Page 6 of 20 12345 6 789101116 Last »

 

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