Search found 888 matches

by w9wi
Thu Jun 14, 2018 12:03 pm
Forum: TV Engineering
Topic: Arris DSR-4460 won't authorize on unencrypted feed
Replies: 13
Views: 300

Re: Arris DSR-4460 won't authorize on unencrypted feed

This is resolved.

(somehow, the firmware upgrade process switched it to DCII mode -- it's supposed to be unencrypted MPEG)
by w9wi
Thu Jun 14, 2018 10:43 am
Forum: TV Engineering
Topic: Arris DSR-4460 won't authorize on unencrypted feed
Replies: 13
Views: 300

Arris DSR-4460 won't authorize on unencrypted feed

We did a firmware upgrade on a DSR-4460 this morning -- afterwards, it won't authorize. It's tuned to the right downlink parameters (frequency, symbol rate, etc.) -- I have a "SIGNAL" light & it goes away if I intentionally enter the wrong DL frequency or pull the RF cable. But the "AUTHORIZED" ligh...
by w9wi
Wed Jun 13, 2018 8:58 am
Forum: TV Studio Engineering
Topic: Weather Radar
Replies: 7
Views: 648

Re: Weather Radar

What would be the legality of directly broadcasting the NOAA feed off the Weather Service website?
by w9wi
Tue Jun 12, 2018 7:58 am
Forum: From the Trenches
Topic: Strange skills learned
Replies: 10
Views: 928

Strange skills learned

A broadcast engineer is, of course, expected to learn on the job. Sometimes, one is expected to learn skills WAY outside the job description. Like deer herding. As I'm sure is the case at many of your stations, our employee parking lot is fenced & gated. Yesterday morning, a fawn decided to follow o...
by w9wi
Thu Jun 07, 2018 6:24 am
Forum: AM Radio
Topic: Restoring a small transmitter
Replies: 24
Views: 5006

Re: Restoring a small transmitter

Sounds like it may be an AL-811, with three 811A tubes in parallel. A copy of the manual (with schematic) is available on http://www.ameritron.com/Downloads/index.php?productid=AL-811&filename=AL-811.pdf&company=ameritron . I would be cautious about operating this amplifier at 400 watts output in br...
by w9wi
Thu May 31, 2018 3:12 pm
Forum: Everything else
Topic: Tomato Soup Incident
Replies: 22
Views: 651

Re: Tomato Soup Incident

1. I wonder what the lab director said when he saw his vat of expensive demineralized water contaminated? :D 2. Touring a UHF TV transmitter... saw , in the middle of a few feet of insulating hose, a metal fixture with a wire attached. Seemed strange, as there was no other electrical connection. (at...
by w9wi
Thu May 24, 2018 4:24 pm
Forum: Everything else
Topic: Full Compass: online ordering issues?
Replies: 0
Views: 85

Full Compass: online ordering issues?

Anyone else having trouble with Full Compass' website? Twice this week I've tried to order something online & found the external credit card processing site never responds. I seem to have developed a bit of a sore throat at the Hamvention & was trying to avoid using my voice but it looks like that's...
by w9wi
Wed May 23, 2018 7:57 pm
Forum: FM Radio
Topic: Compression Question
Replies: 9
Views: 451

Re: Compression Question

Let me second that. We want it normalized, but would rather handle any further processing ourselves.
by w9wi
Sun May 13, 2018 6:35 pm
Forum: Everything else
Topic: Am I a possible engineer candidate?
Replies: 7
Views: 331

Re: Am I a possible engineer candidate?

Curt, so far you've heard from radio people. The situation in television is better, although I'm not going to say it's a bed of roses. - The money is better in TV. Not great, but better. I do suspect you're doing better in your current job. I will say, most folks I've run into trying to make the mov...
by w9wi
Fri May 11, 2018 3:24 pm
Forum: Ask the Engineers
Topic: Leitch Panacea reclocked outputs
Replies: 10
Views: 198

Re: Leitch Panacea reclocked outputs

Strangely enough, the Panacea manual ( http://www.imaginecommunications.com/sites/default/files/documentation/panacea_frames_and_modules_user_guide_20110501.pdf , see page 31) doesn't list 720p50 as a valid format: „ Standards of operation ‰ 525 60/1.001 ‰ 625 50 ‰ 720p 60/1.001 ‰ 720p 60 ‰ 1080i 50...
by w9wi
Fri Apr 13, 2018 8:11 am
Forum: Master Control
Topic: X-Y protocol??
Replies: 20
Views: 1093

Re: X-Y protocol??

Thing is, you're using it for its intended purpose:)
by w9wi
Thu Apr 12, 2018 9:28 pm
Forum: Master Control
Topic: X-Y protocol??
Replies: 20
Views: 1093

Re: X-Y protocol??

I had a frustrating issue with something similar.... I can't find it on the BMD website now, but they at one time sold a DVI extender which pushed SDI over 1694A. Worked fine for the intended purpose, but one guy thought he could use it as a DVI-to-SDI converter. Problem is, it told the computer it ...
by w9wi
Mon Apr 09, 2018 4:28 pm
Forum: Master Control
Topic: X-Y protocol??
Replies: 20
Views: 1093

Re: X-Y protocol??

So I wasn't imagining things about RS-422. It's been a few years (like fifteen) since I've had to work on an X/Y system.

When we went digital (and before we went HD) I had to get a small Jupiter working as the back-end for a Saturn MCR. I still have nightmares.
by w9wi
Mon Apr 09, 2018 11:32 am
Forum: Master Control
Topic: X-Y protocol??
Replies: 20
Views: 1093

Re: X-Y protocol??

That's indeed a rather broad question:) It's a way of connecting control panels to a router, introduced by Leitch. (later Harris later Imagine which still sells X/Y products) Physical connections are a 75-ohm coax bus terminated at both ends. I have a vague recollection there's a way to make it work...