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Search: Posts Made By: Calaveras
Forum: Local HDTV Info and Reception   05-23-2015, 10:07 PM
Replies: 12,524
Views: 1,040,643
Posted By Calaveras
Looks like a Chinese connector. Even Pasternack...

Looks like a Chinese connector. Even Pasternack doesn't sell them. I hope you don't have to order an adapter from China. Maybe you can swap out the connector on the transmitter for an N connector.
...
Forum: Local HDTV Info and Reception   05-23-2015, 06:45 AM
Replies: 12,524
Views: 1,040,643
Posted By Calaveras
It's not on yet. You know how antenna projects...

It's not on yet. You know how antenna projects go. Make your best time estimate and then double it. ;)

Is KEMO DTS2 still on? There's been no License to Cover filing yet.

Chuck
Forum: HDTV Technical   05-22-2015, 11:55 AM
Replies: 11
Views: 147
Posted By Calaveras
What you need to know is here: ...

What you need to know is here:

http://www.aa6g.org/DTV/Reception/tvfool_nm.html
Forum: HDTV Technical   05-22-2015, 07:11 AM
Replies: 18
Views: 354
Posted By Calaveras
Thanks Ron! I've got one station that looks a...

Thanks Ron! I've got one station that looks a little bit like that but the notches are not perfectly spaced. Not sure if it's an example in the real world or not.
Forum: HDTV Technical   05-21-2015, 08:45 AM
Replies: 18
Views: 354
Posted By Calaveras
That's an interesting simulation but I suspect...

That's an interesting simulation but I suspect that seeing a display like that in the real world would be very rare. The delayed signal has to be identical amplitude to see it and only one signal.
...
Forum: HDTV Technical   05-21-2015, 08:37 AM
Replies: 18
Views: 354
Posted By Calaveras
That's just plain old multipath, albeit severe. I...

That's just plain old multipath, albeit severe. I remember this discussion about the caged UHF antenna. In order to have the signal look that bad when pointing at the station, the reflections had to...
Forum: HDTV Technical   05-21-2015, 06:35 AM
Replies: 18
Views: 354
Posted By Calaveras
I'm not aware of multipath ever helping...

I'm not aware of multipath ever helping reception. If you mean can signals ever be received off of a reflection then that's sometimes true. My experience with reflections is that the SNR is low...
Forum: HDTV Technical   05-20-2015, 01:08 PM
Replies: 18
Views: 354
Posted By Calaveras
1) I considered this and there is likely a...

1) I considered this and there is likely a reduction in signals due to the increased diffraction angle. At 70' the angle is 0.9 degrees and at 36' the angle is 1.7 degrees. TV Fool which doesn't take...
Forum: HDTV Technical   05-20-2015, 12:27 PM
Replies: 18
Views: 354
Posted By Calaveras
I see all sorts of ducting related issues here...

I see all sorts of ducting related issues here but I took these readings during periods of what I call "nominal" conditions. That means typical signal strengths I see over the long term with no...
Forum: HDTV Technical   05-20-2015, 07:19 AM
Replies: 18
Views: 354
Posted By Calaveras
That's the situation in this post: ...

That's the situation in this post:

http://www.avsforum.com/forum/25-hdtv-technical/1994554-comparing-signals-over-different-paths.html

with the signals in blue. Lot's of vegetation to look...
Forum: Local HDTV Info and Reception   05-20-2015, 07:06 AM
Replies: 12,524
Views: 1,040,643
Posted By Calaveras
I just noticed that Estrella TV is going to start...

I just noticed that Estrella TV is going to start up on KQCA on June 1. KTNC has Estrella Sacramento on 42.2. Does this mean that KTNC is going to change programming?

Chuck

Edit: I see that...
Forum: Local HDTV Info and Reception   05-20-2015, 07:00 AM
Replies: 12,524
Views: 1,040,643
Posted By Calaveras
Who knows exactly what's going on but if all was...

Who knows exactly what's going on but if all was fine before and now you receive no stations then there has been a failure in the antenna or TV. Check the cable to the TV or try another antenna. A...
Forum: HDTV Technical   05-19-2015, 06:02 PM
Replies: 1
Views: 99
Posted By Calaveras
Example of Vegetation Affecting Signal Strengths-Part 2

This post compares the signal strength of a couple of UHF stations with and without a tree in the path. I have two sets of identical UHF antennas with identical preamps on different towers. In the...
Forum: HDTV Technical   05-19-2015, 05:48 PM
Replies: 18
Views: 354
Posted By Calaveras
Example of Vegetation Affecting Signal Strengths-Part 1

I have a couple of examples of vegetation affecting DTV signal strengths. The spectrum analyzer displays in this post show the difference between my antennas with the tower fully cranked up at 71'...
Forum: Local HDTV Info and Reception   05-19-2015, 03:10 PM
Replies: 12,524
Views: 1,040,643
Posted By Calaveras
This will be very interesting as I have no...

This will be very interesting as I have no experience since the transition with any DTV signals from that location. I used to see KKPX on 65 in the analog days and the signal wasn't very good. TV...
Forum: HDTV Technical   05-18-2015, 07:14 PM
Replies: 9
Views: 157
Posted By Calaveras
I see all the stations you want to receive around...

I see all the stations you want to receive around 65 degrees are 1 and 2 edge paths. Non-LOS stations, especially 2 edge are very hard to receive unless you have a good antenna outdoors and in the...
Forum: Local HDTV Info and Reception   05-18-2015, 06:42 AM
Replies: 12,524
Views: 1,040,643
Posted By Calaveras
Obviously the new KEMO DTS is on the air but they...

Obviously the new KEMO DTS is on the air but they have not filed for a License to Cover. Normally new stations file the same day they start transmitting. They should make it official soon.

Chuck
Forum: Local HDTV Info and Reception   05-18-2015, 06:37 AM
Replies: 12,524
Views: 1,040,643
Posted By Calaveras
I can't take any credit. It's a function built...

I can't take any credit. It's a function built into Photoshop. :)

Chuck
Forum: Local HDTV Info and Reception   05-17-2015, 07:54 PM
Replies: 12,524
Views: 1,040,643
Posted By Calaveras
I had a friend over on Saturday morning to help...

I had a friend over on Saturday morning to help with a little fun project. I mounted my DSLR on the mast of the 55' tower just below the UHF antennas and attached a 75' extension to the shutter...
Forum: HDTV Technical   05-17-2015, 07:21 PM
Replies: 3
Views: 108
Posted By Calaveras
If you're stuck with an indoor antenna you should...

If you're stuck with an indoor antenna you should be happy to get the stations listed in green. Any station with a noise margin <+20 to +30 dB is unlikely to be received with an indoor antenna....
Forum: HDTV Technical   05-17-2015, 03:31 PM
Replies: 18
Views: 500
Posted By Calaveras
There is a way to do this but it is not cheap....

There is a way to do this but it is not cheap. The solution is a crank-up tilt-over tower. When the storm comes you crank it down, tilt it over and it'll be on the ground. Here's an example:
...
Forum: Local HDTV Info and Reception   05-17-2015, 07:01 AM
Replies: 12,524
Views: 1,040,643
Posted By Calaveras
All the transmitters in the DTS (normally) use...

All the transmitters in the DTS (normally) use GPS for synchronization and transmit exactly the same information. This combined with the equalizer in the tuner is what allows two transmitters to use...
Forum: Local HDTV Info and Reception   05-16-2015, 04:28 PM
Replies: 12,524
Views: 1,040,643
Posted By Calaveras
It draws .5 amps and has a maximum output of 1...

It draws .5 amps and has a maximum output of 1 watt so I'm sure it gets a little warm. It's not that big, only about 2" x 3". It just looks big in the picture.

The BNC can be replaced with an F...
Forum: Local HDTV Info and Reception   05-16-2015, 07:30 AM
Replies: 12,524
Views: 1,040,643
Posted By Calaveras
Turns out they do have more power at your angle...

Turns out they do have more power at your angle below the tower. I pulled their vertical radiational pattern from their application and added it to the image for the other Sutro stations that I...
Forum: Local HDTV Info and Reception   05-15-2015, 07:08 AM
Replies: 12,524
Views: 1,040,643
Posted By Calaveras
In their STA filed on 6/4/2014 they stated that...

In their STA filed on 6/4/2014 they stated that the construction of their DTS network was already underway.
...
Showing results 1 to 25 of 3833

 
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