Antenna interaction question
in [Repair]
|
From: Phil Allison on 24 Jan 2010 21:56 "Michael A. Terrell" > > Two antenna used for receiving shouldn't affect each other. Do you > have a TV field strength meter available? You should be able to compare > the signals from both antennas. ** What signals ? Certainly NOT very brief, very weak data bursts on 72 MHz narrowband AM. Only if there is a VHF channel 4 TV transmitter in the vicinity, could the meter be of any use. ..... Phil
From: stratus46 on 24 Jan 2010 22:37 On Jan 24, 6:56 pm, "Phil Allison" <phi...(a)tpg.com.au> wrote: > "Michael A. Terrell" > > > > > Two antenna used for receiving shouldn't affect each other. Do you > > have a TV field strength meter available? You should be able to compare > > the signals from both antennas. > > ** What signals ? > > Certainly NOT very brief, very weak data bursts on 72 MHz narrowband AM. > > Only if there is a VHF channel 4 TV transmitter in the vicinity, could the > meter be of any use. > > .... Phil FYI since the Digital TV analog shutdown last summer, there are no channel 4s and 8 channel 5s in the country. Low band VHF is no longer coveted real estate. G²
From: Michael A. Terrell on 25 Jan 2010 02:50 stratus46(a)yahoo.com wrote: > > On Jan 24, 6:56 pm, "Phil Allison" <phi...(a)tpg.com.au> wrote: > > "Michael A. Terrell" > > > > > > > > > Two antenna used for receiving shouldn't affect each other. Do you > > > have a TV field strength meter available? You should be able to compare > > > the signals from both antennas. > > > > ** What signals ? > > > > Certainly NOT very brief, very weak data bursts on 72 MHz narrowband AM. > > > > Only if there is a VHF channel 4 TV transmitter in the vicinity, could the > > meter be of any use. > > > > .... Phil > > FYI since the Digital TV analog shutdown last summer, there are no > channel 4s and 8 channel 5s in the country. Low band VHF is no longer > coveted real estate. There are other signals, like FM broadcast that will be picked up by the antennas that can be measured with a TV FSM. All you are looking for is something to compare the two antenna systems. -- Greed is the root of all eBay.
From: David on 25 Jan 2010 09:28 <stratus46(a)yahoo.com> wrote in message news:2ed77b36-ceae-45eb-93f5-52a9b87970f4(a)a22g2000yqc.googlegroups.com... > On Jan 24, 6:56 pm, "Phil Allison" <phi...(a)tpg.com.au> > wrote: >> "Michael A. Terrell" >> >> >> >> > Two antenna used for receiving shouldn't affect each >> > other. Do you >> > have a TV field strength meter available? You should >> > be able to compare >> > the signals from both antennas. >> >> ** What signals ? >> >> Certainly NOT very brief, very weak data bursts on 72 >> MHz narrowband AM. >> >> Only if there is a VHF channel 4 TV transmitter in the >> vicinity, could the >> meter be of any use. >> >> .... Phil > > FYI since the Digital TV analog shutdown last summer, > there are no > channel 4s and 8 channel 5s in the country. Low band VHF > is no longer > coveted real estate. > > G� Actually, Chicago has a digital signal on channel 4.(WOCK-CD). See: http://en.wikipedia.org/wiki/WOCK-CD David
From: stratus46 on 25 Jan 2010 19:28
On Jan 25, 6:28 am, "David" <some...(a)somewhere.com> wrote: > <stratu...(a)yahoo.com> wrote in message > > news:2ed77b36-ceae-45eb-93f5-52a9b87970f4(a)a22g2000yqc.googlegroups.com... > > > > > > > On Jan 24, 6:56 pm, "Phil Allison" <phi...(a)tpg.com.au> > > wrote: > >> "Michael A. Terrell" > > >> > Two antenna used for receiving shouldn't affect each > >> > other. Do you > >> > have a TV field strength meter available? You should > >> > be able to compare > >> > the signals from both antennas. > > >> ** What signals ? > > >> Certainly NOT very brief, very weak data bursts on 72 > >> MHz narrowband AM. > > >> Only if there is a VHF channel 4 TV transmitter in the > >> vicinity, could the > >> meter be of any use. > > >> .... Phil > > > FYI since the Digital TV analog shutdown last summer, > > there are no > > channel 4s and 8 channel 5s in the country. Low band VHF > > is no longer > > coveted real estate. > > > G > > Actually, Chicago has a digital signal on channel > 4.(WOCK-CD). See: > > http://en.wikipedia.org/wiki/WOCK-CD > > David When I made that statement I looked through this list http://www.dtv.gov/stationlist.htm I thought this list was part of the FCC. In any event they don't list WOCK which appears to be a comparatively low power station. Suffice it to say they are very few low band VHF stations operating in the US. G² |