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Search: Posts Made By: rabbit73
Forum: HDTV Technical   07-01-2015, 04:33 AM
Replies: 2
Views: 58
Posted By rabbit73
The spectrum analyzer is a good idea. Do...

The spectrum analyzer is a good idea.


Do you have a meter (SLM or RF probe like Sencore DTU-236) that can make comparative measurements of the RF just after conversion from optical in terms of...
Forum: HDTV Technical   06-28-2015, 05:40 PM
Replies: 28
Views: 271
Posted By rabbit73
You might be able to pick up WBRA PBS even though...

You might be able to pick up WBRA PBS even though you don't have a large antenna for channel 3.

WVPT PBS is a very weak poor quality channel. The transmitter profile (click on the callsign in...
Forum: HDTV Technical   06-28-2015, 05:38 PM
Replies: 28
Views: 271
Posted By rabbit73
You might be able to pick up WBRA PBS even though...

You might be able to pick up WBRA PBS even though you don't have a large antenna for channel 3.
WVPT PBS is a very weak poor quality channel. The transmitter profile (click on the callsign in your...
Forum: HDTV Technical   06-28-2015, 04:47 PM
Replies: 28
Views: 271
Posted By rabbit73
You have some FM signals that are stronger than...

You have some FM signals that are stronger than your TV signals, so they might cause interference to your TV reception. You might need an FM filter.

What makes the driveway so white?
Forum: HDTV Technical   06-28-2015, 04:01 PM
Replies: 28
Views: 271
Posted By rabbit73
Maybe not; maybe you can use it. What does it...

Maybe not; maybe you can use it. What does it look like; what does it say on it?
Don't assume, test them.
Maybe; it depends upon where the power inerter is.
If you start with a 2-way splitter for...
Forum: HDTV Technical   06-28-2015, 07:15 AM
Replies: 28
Views: 271
Posted By rabbit73
Thanks for the report; it helps a lot. However, a...

Thanks for the report; it helps a lot. However, a report using exact address or coordinates (which wouldn't show) would have been more accurate for our analysis.
That antenna is not suitable for...
Forum: HDTV Technical   06-27-2015, 03:23 PM
Replies: 28
Views: 271
Posted By rabbit73
An electrician can fish it through for you. An...

An electrician can fish it through for you.
An amplifier might not be necessary. There is such a thing as too much signal which causes overload. We will not know until we see your tvfool report....
Forum: HDTV Technical   06-26-2015, 08:46 AM
Replies: 6
Views: 149
Posted By rabbit73
Pete is an expert. It's Joe that needs the...

Pete is an expert.

It's Joe that needs the help.

I sent a PM to JoeM.
Forum: HDTV Technical   06-26-2015, 08:26 AM
Replies: 8
Views: 264
Posted By rabbit73
ProjectSHO89 is correct; there might be a...

ProjectSHO89 is correct; there might be a problem.

If the output of the STB uses OTA frequencies for local channels, you will need to use a switching system like this to select OTA or satellite...
Forum: HDTV Technical   06-26-2015, 04:53 AM
Replies: 8
Views: 264
Posted By rabbit73
It looks correct to me if the diplexers between...

It looks correct to me if the diplexers between LNB1 and STB1 and LNB2 and STB2 are correct for your satellite system and will pass power to the LNBs.


Holland makes two types, DPD2 and STVC...
Forum: HDTV Technical   06-23-2015, 04:52 PM
Replies: 6
Views: 125
Posted By rabbit73
Which are the ones you don't care about? The...

Which are the ones you don't care about?
The C2V would be OK down to about KUGB.
The mileage ratings are a creation of the marketing department, not the engineering department. You can ignore them...
Forum: HDTV Technical   06-23-2015, 03:29 PM
Replies: 6
Views: 125
Posted By rabbit73
When you did a scan for channels, did you have it...

When you did a scan for channels, did you have it set for antenna instead of cable?

The things that make signals weak in an attic are stucco siding, aluminum siding, attic radiant barrier like...
Forum: HDTV Technical   06-23-2015, 03:20 PM
Replies: 6
Views: 125
Posted By rabbit73
Welcome to the forum, cuttingmycordss: With...

Welcome to the forum, cuttingmycordss:

With signals that strong, you should have gotten better results in the attic.

The signal loss for an attic antenna location is difficult to predict.
...
Forum: HDTV Technical   06-23-2015, 07:45 AM
Replies: 12
Views: 185
Posted By rabbit73
simple tuner thread link here: ...

simple tuner

thread link here:
http://www.avsforum.com/forum/25-hdtv-technical/2035577-simple-tuner.html
Forum: HDTV Technical   06-22-2015, 04:58 PM
Replies: 18
Views: 273
Posted By rabbit73
Sorry about that. I posted it twice, and it...

Sorry about that. I posted it twice, and it tested OK after posting, but the "new and improved forum software" keeps breaking the link in the middle. The new software is also messing with my...
Forum: HDTV Technical   06-22-2015, 11:58 AM
Replies: 18
Views: 273
Posted By rabbit73
Have you grounded the coax and the mast? ...

Have you grounded the coax and the mast?

The coax shield should be grounded with a grounding block that is connected to the house electrical system ground with 10 gauge copper wire for electrical...
Forum: HDTV Technical   06-22-2015, 11:38 AM
Replies: 18
Views: 273
Posted By rabbit73
This is getting hard to diagnose; we need to dig...

This is getting hard to diagnose; we need to dig a little deeper to have a better chance of helping you. Are you willing to answer some more questions and try some experiments?

I am willing to...
Forum: HDTV Technical   06-22-2015, 08:03 AM
Replies: 18
Views: 273
Posted By rabbit73
That's an interesting question. I do have some...

That's an interesting question. I do have some more information, but I didn't want to "overload" Jimcny's input.:)

THREE TYPES OF OVERLOAD
There are three types of preamp or tuner overload, in...
Forum: HDTV Technical   06-21-2015, 04:29 PM
Replies: 18
Views: 273
Posted By rabbit73
I doubt that all those preamps were bad, I think...

I doubt that all those preamps were bad, I think you just overloaded them or the tuner.

Your strongest signal is WKTV with a Noise Margin of 64.3 dB (Pwr -26.5 dBm) even before adding the gain of...
Forum: HDTV Technical   06-21-2015, 08:43 AM
Replies: 16
Views: 304
Posted By rabbit73
I think you have it right because the aerial view...

I think you have it right because the aerial view matches the street view photo.



http://www.rabbitears.info/market.php?request=station_search&callsign=kwsu-tv
click on callsign for...
Forum: HDTV Technical   06-14-2015, 06:07 PM
Replies: 29
Views: 356
Posted By rabbit73
puddleduck_01: The Channel Master...

puddleduck_01:

The Channel Master troubleshooting document for the new 7777 preamp linked in the previous post tells you how to measure the DC voltage for the preamp starting at the PCT AC/DC ...
Forum: HDTV Technical   06-14-2015, 08:22 AM
Replies: 29
Views: 356
Posted By rabbit73
You now have 3 preamp sets. Since you have...

You now have 3 preamp sets.

Since you have an ohmmeter, you probably should be able to measure the DC voltage from the power supply adapter, from the power inserter, and then at the end of the...
Forum: HDTV Technical   06-13-2015, 07:19 PM
Replies: 29
Views: 356
Posted By rabbit73
The new 7777 has 3 parts, the preamp, the power...

The new 7777 has 3 parts, the preamp, the power inserter, and power supply. If the same part has failed 3 times, it would be interesting to know which one. It might give us a clue why.

I wonder...
Forum: HDTV Technical   06-13-2015, 04:10 PM
Replies: 29
Views: 356
Posted By rabbit73
I see a lot of trees and hope they aren't in the...

I see a lot of trees and hope they aren't in the signal path.


http://i496.photobucket.com/albums/rr328/rabbit73_photos/puddleduck_01AVSmap4_zpscdfzlntw.jpg
Forum: HDTV Technical   06-13-2015, 03:47 PM
Replies: 29
Views: 356
Posted By rabbit73
These are the networks; click on a callsign to...

These are the networks; click on a callsign to expand:
http://www.rabbitears.info/market.php?request=station_search&callsign=k04dh-d


2 and 7 are off the air.
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