Search found 839 matches

by w9wi
Mon Nov 13, 2017 5:29 pm
Forum: Ask the Engineers
Topic: Convert to LEDs, or leave 110v?
Replies: 7
Views: 218

Re: Convert to LEDs, or leave 110v?

Those are the neatest thing since sliced bread for us TV guys trying to provide tally lights one can actually see....

BTW, LED bulbs are available in a number of colors. We replaced the incandescant bulbs in our mike lights with green LEDs; MUCH easier to see.
by w9wi
Tue Nov 07, 2017 4:45 am
Forum: Digital Television
Topic: Closed Caption in Digital TV - How?
Replies: 3
Views: 143

Re: Closed Caption in Digital TV - How?

Ah.

I don't know of any way to do it on the editing machine. You do need a separate caption encoder. I Googled on "ISDB-T caption encoder" and found this:
http://www.eitv.com.br/en/produtos/wohl ... ecoder-cc/

This one is for Brazil; I'm not certain it will be correct for other countries.
by w9wi
Mon Nov 06, 2017 7:06 am
Forum: Digital Television
Topic: Closed Caption in Digital TV - How?
Replies: 3
Views: 143

Re: Closed Caption in Digital TV - How?

What is the digital TV standard in your country? In the USA the EIA-708 standard is used for captions. In practice captions are found in the ancillary data of the SDI video stream and encoded into the video stream in the MPEG-2 encoder. I would start by checking the specifications for your MPEG enco...
by w9wi
Tue Oct 24, 2017 3:14 pm
Forum: FCC Discussion
Topic: Pirates captured
Replies: 9
Views: 479

Re: Pirates captured

His drone was homemade. He was flying a SDR and a Raspberry Pi. We have a couple of Phantom 4's here at WSMV - I'm of the impression this guy's drone has far more capacity than a Phantom 4.
by w9wi
Sun Oct 22, 2017 6:58 am
Forum: FCC Discussion
Topic: Pirates captured
Replies: 9
Views: 479

Re: Pirates captured

(There was an interesting presentation on that topic at the Broadcaster's Clinic two weeks ago. He mentioned (but hadn't tried) another interesting application -- flying a thermal imaging camera to check for transmission line and antenna hotspots.)
by w9wi
Sat Oct 21, 2017 12:13 pm
Forum: Broadcast Engineering News
Topic: KFXL Fox 15 in Lincoln NE Tower Collapses
Replies: 3
Views: 239

Re: KFXL Fox 15 in Lincoln NE Tower Collapses

There's a rumor on Facebook that the guy wires were not properly maintained. That is however just a rumor and I know nothing about the quality of the source.
by w9wi
Wed Oct 04, 2017 9:06 pm
Forum: TV Engineering
Topic: ESPN3 streaming parameters?
Replies: 3
Views: 239

Re: ESPN3 streaming parameters?

Finally resolved this after trying five different PCs:( 1: Had even more trouble decoding the stream than the original machine. 1: Refused to install the drivers for the TV tuner card (this machine is also occasionally used to record the competition). Refuses to install unsigned drivers and no signe...
by w9wi
Tue Oct 03, 2017 12:33 pm
Forum: Everything else
Topic: ETRS Reporting Forms 2 & 3 09/27/2017
Replies: 7
Views: 397

Re: ETRS Reporting Forms 2 & 3 09/27/2017

We used Chrome for all three forms & it went fine.
by w9wi
Tue Oct 03, 2017 12:31 pm
Forum: TV Engineering
Topic: ESPN3 streaming parameters?
Replies: 3
Views: 239

Re: ESPN3 streaming parameters?

That's what I was looking for, thanks!

They stopped by this noon & logged in for me. Turns out the computer we're using isn't up to the task. It'll play CBC-TV just fine (at 2.6Mbps) but it can't handle the faster ESPN stream.
by w9wi
Tue Oct 03, 2017 8:44 am
Forum: TV Engineering
Topic: ESPN3 streaming parameters?
Replies: 3
Views: 239

ESPN3 streaming parameters?

Anyone know the codec & bitrate they're using for this stream? Our sports guys have a subscription -- they're complaining it's stuttering & breaking up. I can stream other programs on the same computer without problems. I'm suspecting there's a problem with a codec on this machine, but I don't know ...
by w9wi
Mon Oct 02, 2017 11:27 am
Forum: AM Radio
Topic: Low resource SDR Software
Replies: 18
Views: 1197

Re: Low resource SDR Software

Did you hear anything interesting? It took me awhile to review all the recordings... Identified about 130 stations. Nine metropolitan Chicago stations as small as 500 watts. (WRMN 1410 Elgin) Furthest west was 500-watt KICS 1550 Hastings, Nebraska about 650 miles. Furthest east was 1650 Portsmouth, ...
by w9wi
Fri Aug 25, 2017 9:22 pm
Forum: FCC Discussion
Topic: FCC runs out of LPTV callsigns (kinda)
Replies: 0
Views: 214

FCC runs out of LPTV callsigns (kinda)

High-VHF channels have always been popular for translators in the West. The DTV conversion bumped many to new channels and got us pretty close to the end of the alphabet in some places. K07ZR (Harlowton, Montana); K09ZB (Havre, Montana); and K13ZS (Sargents, Colorado) were assigned. I figured the re...
by w9wi
Wed Aug 23, 2017 6:10 am
Forum: AM Radio
Topic: Low resource SDR Software
Replies: 18
Views: 1197

Re: Low resource SDR Software

I have (I think) the same hardware as Kevin -- the SDRPlay RSP1. I'm happy with it. Good strong-signal handling; with a 260-foot center-fed antenna attached, not a hint of spurious reception in either the AM BCB or shortwave. (or FM although it's clearly not an FM antenna:) )
by w9wi
Tue Aug 22, 2017 8:42 am
Forum: AM Radio
Topic: Bleed over
Replies: 7
Views: 573

Re: Bleed over

IMHO you need to break this down step by step. I suspect you may have more than one problem. I think what I would do... is *turn off* the 1240 transmitter. Turn up the levels on the 1240 audio and see if it still bleeds over. If it still bleeds over with the 1240 transmitter turned off... you have a...
by w9wi
Mon Aug 21, 2017 7:43 pm
Forum: AM Radio
Topic: Low resource SDR Software
Replies: 18
Views: 1197

Re: Low resource SDR Software

Well. This is going to take awhile:) There was a dramatic improvement in conditions as totality approached. At 1645z (roughly 90 minutes before totality) most of the expanded-band was empty -- there's a weak signal from Huntsville 100 miles away on 1700, and a poor signal from the TDOT TIS stations ...