Search found 423 matches

by grich
Fri Apr 19, 2019 3:44 pm
Forum: TV Engineering
Topic: emergency STL
Replies: 1
Views: 61

emergency STL

I've been staring at the MRC QM2 mod and demod that was used with the old Twinstream system, and wondering if they could somehow be used to push a SMPTE310 signal through a 2GHz ENG radio as an emergency STL? I just started playing with this on the bench using a spare MRC Strata TX transmitter and M...
by grich
Mon Apr 15, 2019 12:39 pm
Forum: Ask the Engineers
Topic: Audio dropouts on Yankees game broadcasts
Replies: 28
Views: 617

Re: Audio dropouts on Yankees game broadcasts

Might I suggest another reason for WFAN to turn off IBOC during home games...for the benefit of fans at the stadium who might be listening on portable radios...a quaint idea, I know. :D Last fall, I was hearing similar drop-outs on Learfield's Iowa State football games, and I'm pretty sure I heard t...
by grich
Mon Apr 08, 2019 6:50 pm
Forum: FM Radio
Topic: Gotta love Westwood One
Replies: 16
Views: 994

Re: Gotta love Westwood One

Yeppers. And it's NOT a vanity call...lol. Yeah, we lost the Super Bowl that year, along with dozens of other stations. Westwood claimed an instrument from a nearby marching band generated a sub-audible note of the right frequency that tripped their decoder. I guess they never heard of a high-pass ...
by grich
Sat Mar 30, 2019 7:21 am
Forum: TV Engineering
Topic: Adding Genlock
Replies: 38
Views: 846

Re: Adding Genlock

We had a Flexicoder and used the built-in switcher and keyer for the HD side of master control, driven by GPI commands from the MCAS automation. I recall a Ultech (?) 708 encoder that decoded CC in the plant and spit out RS232 to feed the Flexicoder. Dang, that's been a while ago.
by grich
Thu Mar 21, 2019 5:13 pm
Forum: TV Engineering
Topic: NBC Namedropper Trigger Configuration Help
Replies: 11
Views: 348

Re: NBC Namedropper Trigger Configuration Help

Glad you were able to figure it out.

How do you not have a Skypath rack? You must be a new affiliate. Most of us are lucky enough to have 30-year-old dishes with a rack of 1290 receivers protected by a UPS that takes a month or more for NBC's contractor to ship a replacement when they die. :D
by grich
Wed Mar 20, 2019 9:39 pm
Forum: TV Engineering
Topic: NBC Namedropper Trigger Configuration Help
Replies: 11
Views: 348

Re: NBC Namedropper Trigger Configuration Help

First of all, enter "namedropper" in this forum's search box and you'll get some threads on the Namedropper triggers and how to view them. You mentioned trying to inject the network into the Aux input during one of your tests. I don't know if the ND will read data from there, but I've never tried. T...
by grich
Mon Feb 18, 2019 1:51 pm
Forum: AM Radio
Topic: Gates One Blows PA Fuses w/ Modulation
Replies: 26
Views: 1561

Re: Gates One Blows PA Fuses w/ Modulation

Fuse holders are cheap and usually not at all difficult to change. Nautel had an issue some 10 or so years ago with a bad batch of fuse holders. After a problem with one I replaced all of them on the ND25 just taken out of service this past summer. No fault of Nautel - blame it on the maker of the ...
by grich
Thu Feb 14, 2019 11:51 pm
Forum: FM Radio
Topic: Optimod 2200
Replies: 6
Views: 440

Re: Optimod 2200

I had this happen once with a 2200 at a site with poor AC power regulation. I rebooted the unit to fix it, then put it on a UPS. No more troubles.

I have another 2200 at a different site that I haven't had an issue with, but I also put it on a UPS as a precaution.
by grich
Thu Feb 14, 2019 9:55 am
Forum: Radio Studio Engineering
Topic: DBX286 with an 8Khz whine from the de-esser
Replies: 5
Views: 534

Re: DBX286 with an 8Khz whine from the de-esser

WAG, since I never worked on one...look for dried-up caps on the power supply rails.
by grich
Tue Jan 29, 2019 10:31 am
Forum: Ask the Engineers
Topic: Snow removal on 5 meter dish
Replies: 7
Views: 379

Re: Snow removal on 5 meter dish

On most dishes at the day job, we're using an extendable pole with a squeegee modified by the boss to have a curved surface to match the dish best as possible.
by grich
Mon Jan 21, 2019 10:37 pm
Forum: AM Radio
Topic: Gates One Blows PA Fuses w/ Modulation
Replies: 26
Views: 1561

Re: Gates One Blows PA Fuses w/ Modulation

I would strongly suggest finding a way to do the internal measurement under power without cheating interlocks. There’s often a way of sneaking a couple of test leads out of the cabinet without bypassing interlocks. Different situation but I once had to measure some voltage in a Continental 315F 10k...
by grich
Sun Jan 20, 2019 2:44 pm
Forum: FM Radio
Topic: Gotta love Westwood One
Replies: 16
Views: 994

Gotta love Westwood One

Got a call from a client while shoveling snow...local breaks aren't firing in the NFC Championship game. The PD had rechecked his automation programming and all looked well. I told him to call WWOne NetOps...they will check your receiver, tell you everything looks good, and the breaks will magically...
by grich
Tue Jan 01, 2019 12:48 am
Forum: AM Radio
Topic: Gates One Blows PA Fuses w/ Modulation
Replies: 26
Views: 1561

Re: Gates One Blows PA Fuses w/ Modulation

I've never worked on a Gates One, but it's basically an SX-1 with many of the mistakes removed... Before the PA fuse blows, is there an obvious imbalance in the PA phases? Follow the procedure in the manual to test in-circuit ALL of the PA MOSFETs and the PDM Amp MOSFETs. Be sure to use a suitable V...
by grich
Thu Dec 20, 2018 4:29 pm
Forum: From the Trenches
Topic: "Help" desk
Replies: 11
Views: 797

Re: "Help" desk

Love talking to first-level support that insist on working the script, even though your introduction to the problem stated all of the obvious first troubleshooting steps had been taken. Perhaps side-tracking the thread, but I've found it interesting that the two most productive IT troubleshooting ph...
by grich
Fri Dec 14, 2018 9:54 pm
Forum: From the Trenches
Topic: Make the whole house shake
Replies: 9
Views: 473

Re: Make the whole house shake

I usually won't be caught dead in an equipment rack during a newscast. Twenty-some years ago I bumped a prompter DA once during a newscast and made it blank for a second. Caught more hell from that (all from the on-air anchor) than the three times I messed up the station signal in front of three dif...