T
TXengineer
Guest
I talked to the chief engineer of the station today. The reason bays 2 & 3 are out of phase of one and four is because the antenna operates with a 10° beam tilt.
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H
HOMEYD
Guest
> I talked to the chief engineer of the station today. The
> reason bays 2 & 3 are out of phase of one and four is
> because the antenna operates with a 10° beam tilt.
>
That's a lot of tilt. Is their radiator high and right on top
of the target audience?
> reason bays 2 & 3 are out of phase of one and four is
> because the antenna operates with a 10° beam tilt.
>
That's a lot of tilt. Is their radiator high and right on top
of the target audience?
T
TXengineer
Guest
> > I talked to the chief engineer of the station today. The
> > reason bays 2 & 3 are out of phase of one and four is
> > because the antenna operates with a 10° beam tilt.
> >
>
> That's a lot of tilt. Is their radiator high and right on
> top
> of the target audience?
>
Yes it is.
It is 800 feet on top of a cliff on the edge of a metro area.
However the chief is not happy with the performance of the antenna system
(it was installed by the former chief) and he is talking about replacing it with a antenna with a much less extreme tilt, if any at all.
Their aux/IBOC antenna has no tilt to it and it has an overall better signal than the primary.
> > reason bays 2 & 3 are out of phase of one and four is
> > because the antenna operates with a 10° beam tilt.
> >
>
> That's a lot of tilt. Is their radiator high and right on
> top
> of the target audience?
>
Yes it is.
It is 800 feet on top of a cliff on the edge of a metro area.
However the chief is not happy with the performance of the antenna system
(it was installed by the former chief) and he is talking about replacing it with a antenna with a much less extreme tilt, if any at all.
Their aux/IBOC antenna has no tilt to it and it has an overall better signal than the primary.
H
HOMEYD
Guest
> > > I talked to the chief engineer of the station today. The
>
> > > reason bays 2 & 3 are out of phase of one and four is
> > > because the antenna operates with a 10° beam tilt.
> > >
> >
> > That's a lot of tilt. Is their radiator high and right on
>
> > top
> > of the target audience?
> >
>
> Yes it is.
> It is 800 feet on top of a cliff on the edge of a metro
> area.
> However the chief is not happy with the performance of the
> antenna system
> (it was installed by the former chief) and he is talking
> about replacing it with a antenna with a much less extreme
> tilt, if any at all.
> Their aux/IBOC antenna has no tilt to it and it has an
> overall better signal than the primary.
>
How many bays is the iboc antenna? If less than four, that may be why it's better.
A one bay might work nicely, if it would fit in his erp budget.
>
> > > reason bays 2 & 3 are out of phase of one and four is
> > > because the antenna operates with a 10° beam tilt.
> > >
> >
> > That's a lot of tilt. Is their radiator high and right on
>
> > top
> > of the target audience?
> >
>
> Yes it is.
> It is 800 feet on top of a cliff on the edge of a metro
> area.
> However the chief is not happy with the performance of the
> antenna system
> (it was installed by the former chief) and he is talking
> about replacing it with a antenna with a much less extreme
> tilt, if any at all.
> Their aux/IBOC antenna has no tilt to it and it has an
> overall better signal than the primary.
>
How many bays is the iboc antenna? If less than four, that may be why it's better.
A one bay might work nicely, if it would fit in his erp budget.
T
TXengineer
Guest
ERI HPX series 4 bay in radomes on a tower about 30 feet from the primary.
He is replacing the 10° antenna with a much less severe tilt antenna this coming summer. (Supposidly going with a smaller antenna too, 3 bay full wave spaced)
He is replacing the 10° antenna with a much less severe tilt antenna this coming summer. (Supposidly going with a smaller antenna too, 3 bay full wave spaced)
C
CW
Guest
> > > I talked to the chief engineer of the station today. The
>
> > > reason bays 2 & 3 are out of phase of one and four is
> > > because the antenna operates with a 10° beam tilt.
> > >
> >
> > That's a lot of tilt. Is their radiator high and right on
>
> > top
> > of the target audience?
> >
>
> Yes it is.
> It is 800 feet on top of a cliff on the edge of a metro
> area.
> However the chief is not happy with the performance of the
> antenna system
> (it was installed by the former chief) and he is talking
> about replacing it with a antenna with a much less extreme
> tilt, if any at all.
> Their aux/IBOC antenna has no tilt to it and it has an
> overall better signal than the primary.
What they need is NULL FILL not tilt! Tilt only helps toward the horizon...
Null Fill will fix their problem.
Beam tilt is usually used to prevent interference to cochannel stations at the edge of the service contour but doesnt help at all locally.
(think of beam tilt as bending the edge of an umbrella down more...yet look at the mast which is your close-in area and see no improvement there)
>
> > > reason bays 2 & 3 are out of phase of one and four is
> > > because the antenna operates with a 10° beam tilt.
> > >
> >
> > That's a lot of tilt. Is their radiator high and right on
>
> > top
> > of the target audience?
> >
>
> Yes it is.
> It is 800 feet on top of a cliff on the edge of a metro
> area.
> However the chief is not happy with the performance of the
> antenna system
> (it was installed by the former chief) and he is talking
> about replacing it with a antenna with a much less extreme
> tilt, if any at all.
> Their aux/IBOC antenna has no tilt to it and it has an
> overall better signal than the primary.
What they need is NULL FILL not tilt! Tilt only helps toward the horizon...
Null Fill will fix their problem.
Beam tilt is usually used to prevent interference to cochannel stations at the edge of the service contour but doesnt help at all locally.
(think of beam tilt as bending the edge of an umbrella down more...yet look at the mast which is your close-in area and see no improvement there)
H
HOMEYD
Guest
> > > > I talked to the chief engineer of the station today.
> The
> >
> > > > reason bays 2 & 3 are out of phase of one and four is
> > > > because the antenna operates with a 10° beam tilt.
> > > >
> > >
> > > That's a lot of tilt. Is their radiator high and right
> on
> >
> > > top
> > > of the target audience?
> > >
> >
> > Yes it is.
> > It is 800 feet on top of a cliff on the edge of a metro
> > area.
> > However the chief is not happy with the performance of the
>
> > antenna system
> > (it was installed by the former chief) and he is talking
> > about replacing it with a antenna with a much less extreme
>
> > tilt, if any at all.
> > Their aux/IBOC antenna has no tilt to it and it has an
> > overall better signal than the primary.
>
> What they need is NULL FILL not tilt! Tilt only helps toward
> the horizon...
> Null Fill will fix their problem.
> Beam tilt is usually used to prevent interference to
> cochannel stations at the edge of the service contour but
> doesnt help at all locally.
> (think of beam tilt as bending the edge of an umbrella down
> more...yet look at the mast which is your close-in area and
> see no improvement there)
>
Agreed CW. That's why I mentioned a one bay in the next post.
With a one bay you wouldn't need null fill.
BTW...I like your umbrella analogy
> The
> >
> > > > reason bays 2 & 3 are out of phase of one and four is
> > > > because the antenna operates with a 10° beam tilt.
> > > >
> > >
> > > That's a lot of tilt. Is their radiator high and right
> on
> >
> > > top
> > > of the target audience?
> > >
> >
> > Yes it is.
> > It is 800 feet on top of a cliff on the edge of a metro
> > area.
> > However the chief is not happy with the performance of the
>
> > antenna system
> > (it was installed by the former chief) and he is talking
> > about replacing it with a antenna with a much less extreme
>
> > tilt, if any at all.
> > Their aux/IBOC antenna has no tilt to it and it has an
> > overall better signal than the primary.
>
> What they need is NULL FILL not tilt! Tilt only helps toward
> the horizon...
> Null Fill will fix their problem.
> Beam tilt is usually used to prevent interference to
> cochannel stations at the edge of the service contour but
> doesnt help at all locally.
> (think of beam tilt as bending the edge of an umbrella down
> more...yet look at the mast which is your close-in area and
> see no improvement there)
>
Agreed CW. That's why I mentioned a one bay in the next post.
With a one bay you wouldn't need null fill.
BTW...I like your umbrella analogy
T
TXengineer
Guest
See this is all what we talked about. The engineer before him had NO clue about FM and "plan" for this fm site was poor at best.
Null fill is a good thing.
Could the guy who set that old system up not spell
c o n s u l t a n t ?
Believe it or not, I still find recently installed horizontal-only stations.<P ID="signature">______________
Proud 2 B a pioneering satellite radio subs¢riber
Ai4i is always on the trailing edge of technology
______________</P>
Could the guy who set that old system up not spell
c o n s u l t a n t ?
Believe it or not, I still find recently installed horizontal-only stations.<P ID="signature">______________
Proud 2 B a pioneering satellite radio subs¢riber
Ai4i is always on the trailing edge of technology
______________</P>
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