Search found 885 matches

by w9wi
Tue Aug 14, 2018 6:24 am
Forum: Everything else
Topic: WWV WWVH
Replies: 8
Views: 111

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: 12
Views: 388

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: 495

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: 271

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: 207

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: 207

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: 207

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: 97

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: 231

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: 231

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...
by w9wi
Thu Jun 14, 2018 2:36 pm
Forum: TV Engineering
Topic: Arris DSR-4460 won't authorize on unencrypted feed
Replies: 13
Views: 231

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

Ouch. Sorry to hear that...
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: 231

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: 231

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...