Search found 889 matches

by w9wi
Wed Oct 03, 2018 3:02 pm
Forum: Everything else
Topic: RING MY BELL
Replies: 21
Views: 397

Re: RING MY BELL

Worked fine (both smartphones and EAS) in Nashville.

We did see IPAWS go offline *after* the test, between 3:28 and 3:40 Central. (has anyone else seen that?)
by w9wi
Mon Aug 27, 2018 6:13 am
Forum: TV Studio Engineering
Topic: Genlock
Replies: 6
Views: 552

Re: Genlock

If you're recording each camera to its own recorder, you don't need genlock. Genlock is necessary only if you're connecting the cameras to a video switcher and recording all three on the *same* recorder. If you did need genlock it would need to be applied to all three cameras. It would not strictly ...
by w9wi
Sat Aug 25, 2018 10:56 am
Forum: General Computers
Topic: computer dropping off network
Replies: 11
Views: 575

Re: computer dropping off network

Power management?

Hams have been reporting issues with ports being turned off by Windows when it (wrongly) concludes they aren't in use.
by w9wi
Tue Aug 14, 2018 8:33 pm
Forum: FM Radio
Topic: 500w translator
Replies: 16
Views: 653

Re: 500w translator

A check of the FCC database shows twenty-seven FM translators authorized with ERPs in excess of 250 watts. Thirteen are in Alaska where the Commission has waived various translator rules for some time. (the biggest is K220AD Valdez, running 1.09kW. ) W297BT New Britain, Connecticut seems to be a typ...
by w9wi
Tue Aug 14, 2018 6:24 am
Forum: Everything else
Topic: WWV WWVH
Replies: 16
Views: 703

Re: WWV WWVH

I'm curious about the telephone service, which I frequently use as a "sanity check" of NTP installations & GPS clocks. The article says "NIST said eliminating funding currently “supporting fundamental measurement dissemination...” which leads me to believe they do mean everything that has to do with...
by w9wi
Tue Aug 07, 2018 6:46 pm
Forum: FM Radio
Topic: 500w translator
Replies: 16
Views: 653

Re: 500w translator

If you look at the application https://licensing.fcc.gov/cgi-bin/ws.exe/prod/cdbs/forms/prod/cdbsmenu.hts?context=25&appn=101787282&formid=1&fac_num=166073 that's exactly what happened. Reference Exhibit 7 for what the ERP & TPO *should* be. Weren't C4 stations supposed to get 12kW? At 10.5kW I'd su...
by w9wi
Wed Jul 04, 2018 6:21 am
Forum: AM Radio
Topic: Anyone Home?
Replies: 13
Views: 581

Re: Anyone Home?

...and the station aired a combination of "This is the Yankees Radio Network" and 1000 Hz tone, from around 11pm until the morning show started at 5am. This is not at all unfamiliar to DXers, who encounter this kind of thing on various frequencies with amusing and frustrating frequency... =========...
by w9wi
Fri Jun 22, 2018 2:16 pm
Forum: Ask the Engineers
Topic: RF Triangulation - number of devices
Replies: 10
Views: 305

Re: RF Triangulation - number of devices

Is it possible to use several RTL SDR DVB-T dongles (RTL2832U+R820T) to determine the number of devices within different zones? (traingulation) I am interested in being able to record the number of active devices (smartphones, cell phones) in different locations in space/time. I don't have to know ...
by w9wi
Wed Jun 20, 2018 1:30 pm
Forum: Ask the Engineers
Topic: Peaking a dish alone
Replies: 5
Views: 227

Re: Peaking a dish alone

I was rather surprised at the Arris. I expected to have to manually enter PIDs, but best I can tell there is no way to do so on that IRD. It worked fine on the old SD feeds. On hindsight.. my boss tuned the RX8200 & he didn't say anything about having to manually enter PIDs. Although he used Compusa...
by w9wi
Wed Jun 20, 2018 7:22 am
Forum: Ask the Engineers
Topic: Peaking a dish alone
Replies: 5
Views: 227

Re: Peaking a dish alone

It turned out the dish in question was already peaked... it simply isn't going to deliver enough RF to make this work. We stole a dish from News until the new LNB arrives. Someone who's a better-qualified steeplejack will be swapping it. We normally use an Arris -- I want to say DSR-4460 but I'm out...
by w9wi
Mon Jun 18, 2018 1:45 pm
Forum: Ask the Engineers
Topic: Peaking a dish alone
Replies: 5
Views: 227

Peaking a dish alone

Faced a bit of a challenge this morning. I had a satellite dish not quite delivering enough signal on Galaxy 19. Needed to peak it up -- but there's no motor on this dish. The feed is 25 feet in the air so temporarily connecting a spectrum analyzer to the back of the LNB wasn't really an option. It'...
by w9wi
Fri Jun 15, 2018 2:22 pm
Forum: General Computers
Topic: Avocent HMIQSHDI restore factory defaults?
Replies: 1
Views: 156

Avocent HMIQSHDI restore factory defaults?

I have a HMIQSHDI KVM transmitter configured for an unknown IP address. I need to reconfigure for a specific network. You change the IP by connecting the transmitter directly to a receiver, then connecting a RS-232 terminal to the receiver and using a serial menu. Problem is, for that to work the re...
by w9wi
Fri Jun 15, 2018 2:16 pm
Forum: TV Engineering
Topic: Arris DSR-4460 won't authorize on unencrypted feed
Replies: 13
Views: 306

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

Over the years I've found that different decoders are better for certain applications than others. We've used Tandberg / Ericsson for satellite downlinks and ASI decoders for years without too much fuss, but the 8200 is troublesome if you're trying to decode an IP stream. Upcoms (yeah, right!) have...
by w9wi
Thu Jun 14, 2018 8:28 pm
Forum: TV Engineering
Topic: Arris DSR-4460 won't authorize on unencrypted feed
Replies: 13
Views: 306

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

I'm glad I took this shot at getting a look at the web GUI. The front-panel UI on these Arris (Motorola) IRDs is pretty weird -- I took our .2 off the air for a few minutes last week just trying to write down where we currently were, without changing anything... It'll be a LOT easier with the browse...