TV Transmitter Feeds at
DV Info Net

Go Back   DV Info Net > And Now, For Something Completely Different... > The TOTEM Poll: Totally Off Topic, Everything Media

The TOTEM Poll: Totally Off Topic, Everything Media
Let's talk about anything media related.

Thread Tools Search this Thread
Old August 12th, 2008, 01:13 AM   #1
Regular Crew
Join Date: Jul 2008
Location: Chichester UK
Posts: 167
TV Transmitter Feeds

OK, this is so obsessive that makes train spotting seem mainstream. However, there may be another nerdlet or two out there with which this chimes!

TV transmitters have to get their signal from somewhere, either by landline, or microwave or in the case of relay transmitters simply by picking up off air from somewhere else. I expect now some get the signal from satellite. Some of these routes to remote transmitters can be tortuous in the extreme. The (ex) BBC transmitter at Eitshal in the Outer Hebrides (UK) is the best I know of. From Rosemarkie (Inverness), a main transmitter connected to the main network, there is a chain of passive and active relay stations (unmanned) erected with great difficulty over the Scottish Highlands right across to the Western coast, where the final leg across to the Western Isles is multi-frequency to combat phase cancellation from reflections off the sea. Some of these relays had to utilise ponies to get the equipment on site - no roads.

Other countries are much larger and have more remote areas than the UK and if anyone knows of a more eccentric transmitter feed route, do tell!

Nick F.
Nick Flowers is offline   Reply With Quote
Old August 22nd, 2008, 06:27 PM   #2
Join Date: Jan 2008
Location: North Conway, NH
Posts: 1,745
Ah... the notorious studio-transmitter link.

I worked in radio years ago and all the stations with remote transmitters (most of them) used either phone lines or microwave relays. Given televisions much larger bandwidth requirements, long-haul phone lines would get rather dear.

Before satellites, the three US networks would use microwave repeaters to bring the network signals from either New York or Los Angeles to the local market outlet.

Stringing a bunch of microwave stations together across the US was probably less of a challenge than the low altitude transmission you refer to. Getting programs across the flat American prairie meant building tall towers and finding whatever passes for a hill in those parts. Getting the signal across mountains would probably be simpler since you could likely go farther before the curvature of the earth got in the way.

I have no idea how they got the equipment to peaks in the Rockies or Sierras, but I would suspect that helicopters played a role.

C-band satellite dishes have been hauling in distant signals for cable TV providers for at least two decades so the reliability has been well perfected. I'm not sure if the broadcast networks even use microwave anymore except possibly as a last resort backup, but I've been out of the business for many years.

BTW... up until the acceptance of satellites by the networks as a transmission media, network TV outlets in Alaska and Hawaii had to wait for physical tapes from the network to arrive before they could show the latest evening dramas and sitcoms. Thus those in the two newest states had to wait about a week for their latest sitcoms, dramas and soaps.
Tripp Woelfel is offline   Reply With Quote
Old August 23rd, 2008, 12:56 AM   #3
Regular Crew
Join Date: Jul 2008
Location: Chichester UK
Posts: 167
Routing the microwave towers

Thanks for that, Tripp.

When the microwave network was being rolled out in France all those years ago, they found that they were putting the towers on the same sites as those chosen for the optical telegraph system installed in Napoleonic days. The French optical system was HUGE! it stretched from Paris as far as Italy and even down to what was Yugoslavia. They used tall posts with a horizontal bar on top with things like old style railway signals on each end. We had a similar but less extensive system in England. A time signal from London to Plymouth took less than five minutes to be sent and the acknowledgement to come back - a round trip of over 500 miles.
So line of sight was the common factor with placing the stations of both systems!
Nick Flowers is offline   Reply

DV Info Net refers all where-to-buy and where-to-rent questions exclusively to these trusted full line dealers and rental houses...

B&H Photo Video
(866) 521-7381
New York, NY USA

Scan Computers Int. Ltd.
+44 0871-472-4747
Bolton, Lancashire UK

DV Info Net also encourages you to support local businesses and buy from an authorized dealer in your neighborhood.
  You are here: DV Info Net > And Now, For Something Completely Different... > The TOTEM Poll: Totally Off Topic, Everything Media

Thread Tools Search this Thread
Search this Thread:

Advanced Search


All times are GMT -6. The time now is 10:18 PM.

DV Info Net -- Real Names, Real People, Real Info!
1998-2019 The Digital Video Information Network