Long range communication
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Has anyone ever tried using two of those 5-mile radios (I think they
are GRMS) to communicate between two stamps. Could it be as simple
as putting a relay to transmit across the push-to-talk button to
transmit. Maybe have the transmitting stamp put out X amount of
pulses and the receiving stamp can decode those pulses. Does anyone
have any experience with this or know where I can get more
information?
Thanks,
Chris
are GRMS) to communicate between two stamps. Could it be as simple
as putting a relay to transmit across the push-to-talk button to
transmit. Maybe have the transmitting stamp put out X amount of
pulses and the receiving stamp can decode those pulses. Does anyone
have any experience with this or know where I can get more
information?
Thanks,
Chris
Comments
However I am uncertain as to the use of digital communication on those bands.
Ham radio allows for digital modes and licensing is a mere $6.00 to take the
exam.
That being said, you would need a "COR" signal coming from the receiver to
recognize the presence of an unmodulated carrier to
implement the method you described.
I have had some success in using "Direct FSK" but the range tends to be less
than that of a voice signal, DTMF provides a bit more
range, but slows the throughput.
If speed vs. bandwidth dictates there a devices known as "TNC's" which are radio
modems that allow digital serial data to be sent
over distances equal to or greater than that of voice using the same radio
equipment.
- KF4HAZ -
From: "christopher41877" <CHRIS@
> Has anyone ever tried using two of those 5-mile radios (I think they
> are GRMS) to communicate between two stamps. Could it be as simple
> as putting a relay to transmit across the push-to-talk button to
> transmit. Maybe have the transmitting stamp put out X amount of
> pulses and the receiving stamp can decode those pulses. Does anyone
> have any experience with this or know where I can get more
> information?
>
> Thanks,
>
> Chris
the lines of morse code. I know that it's easier to interpret
pulses instead of voice communication and that's why I was thinking
of cheap radios. Thanks for the info.
Chris
--- In basicstamps@yahoogroups.com, "FalconWireless Tech Support -
KF4HAZ" <techsupport@f...> wrote:
> GMRS requires a $75.00 License for the operator at each end, FRS
does not.
> However I am uncertain as to the use of digital communication on
those bands.
> Ham radio allows for digital modes and licensing is a mere $6.00
to take the exam.
>
> That being said, you would need a "COR" signal coming from the
receiver to recognize the presence of an unmodulated carrier to
> implement the method you described.
> I have had some success in using "Direct FSK" but the range tends
to be less than that of a voice signal, DTMF provides a bit more
> range, but slows the throughput.
> If speed vs. bandwidth dictates there a devices known as "TNC's"
which are radio modems that allow digital serial data to be sent
> over distances equal to or greater than that of voice using the
same radio equipment.
>
> - KF4HAZ -
>
>
From: "christopher41877" <CHRIS@
> > Has anyone ever tried using two of those 5-mile radios (I think
they
> > are GRMS) to communicate between two stamps. Could it be as
simple
> > as putting a relay to transmit across the push-to-talk button to
> > transmit. Maybe have the transmitting stamp put out X amount of
> > pulses and the receiving stamp can decode those pulses. Does
anyone
> > have any experience with this or know where I can get more
> > information?
> >
> > Thanks,
> >
> > Chris
There is lots of hardware out there for the HAM from simple
radio modems, aka TNCs to things the PSK31 and a host of
other protocols. In fact ham radio has been doing wireless
data communications since it's inception in the early days
of radio.
The biggest problem lies inthe fact that high speed
communications is almost non existant in the HAM bands. Most
of it is in te 1200 baud or below range because there are
legal limitations to bandwidths and most of the high speed
stuff is not done in the ham bands. We do do amatuer TV,
Slow Scan TV and a number of other high bandwidth protocols,
but almost all the ham based data transmissions are done at
a fairly low speed due to these bandwidth limitations. If
you can live with 9600 baud, there are a number of options
available to all hams, technician class and above. 9600 baud
is pretty good unless you plan on sending lot's of graphics,
in which case, you'll just have to wait. For graphics, it's
better to send via ATV on a seperate channel. If you're
planing relativly short range communications, there are a
number of commercial options available to you. By the time
you pay for all the hardware, you'd probably be better off
using a comercial venue. A cellular modem is small and not
as expesive as some other options, but you pay for the
service.
If you operate in the 0-500 foot range, I would suggest
using wireless ethernet. There are ethernet modules that can
be plugged into the stamp and those can be connected to
wireless 802.11b or 802.11g adaptors that are readily
available. These offer high bandwidth capabilities that the
stamp will not push. Look at the wireless game adaptors for
the xbox and playstation from Linksys. They're fairly
bulletproof, cheap and don't require any licensing to
operate.
--
Regards
Dave Evartt
American Hovercraft
privileges in some parts of the bands. As to cheap
radios, after you get your license visit a hamfest, you can pick up bricks like
the good ol htx-202 with a busted lcd cheap, and who
cares if the display is shot if you want to play packet or monitor a remote
weather station or control some new experimental gizmo.
Experimentation is encouraged in the ham bands (within the frequency ranges
designated for experimental/digital/remote/et.al.)
provided you have the license.
From: "christopher41877" <CHRIS@
> Can you use ham radios to send signals? I was thinking more along
> the lines of morse code. I know that it's easier to interpret
> pulses instead of voice communication and that's why I was thinking
> of cheap radios. Thanks for the info.
>
> Chris
>
>
> --- In basicstamps@yahoogroups.com, "FalconWireless Tech Support -
> KF4HAZ" <techsupport@f...> wrote:
> > GMRS requires a $75.00 License for the operator at each end, FRS
> does not.
> > However I am uncertain as to the use of digital communication on
> those bands.
> > Ham radio allows for digital modes and licensing is a mere $6.00
> to take the exam.
> >
> > That being said, you would need a "COR" signal coming from the
> receiver to recognize the presence of an unmodulated carrier to
> > implement the method you described.
> > I have had some success in using "Direct FSK" but the range tends
> to be less than that of a voice signal, DTMF provides a bit more
> > range, but slows the throughput.
> > If speed vs. bandwidth dictates there a devices known as "TNC's"
> which are radio modems that allow digital serial data to be sent
> > over distances equal to or greater than that of voice using the
> same radio equipment.
> >
> > - KF4HAZ -
> >
> >
From: "christopher41877" <CHRIS@
> > > Has anyone ever tried using two of those 5-mile radios (I think
> they
> > > are GRMS) to communicate between two stamps. Could it be as
> simple
> > > as putting a relay to transmit across the push-to-talk button to
> > > transmit. Maybe have the transmitting stamp put out X amount of
> > > pulses and the receiving stamp can decode those pulses. Does
> anyone
> > > have any experience with this or know where I can get more
> > > information?
> > >
> > > Thanks,
> > >
> > > Chris
>
>
> To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
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of the message will be ignored.
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
ham radios. 1, what is the range? 2, where can I get more
information on getting a license?
Thanks,
Chris
--- In basicstamps@yahoogroups.com, "FalconWireless Tech Support -
KF4HAZ" <techsupport@f...> wrote:
> Yes a Technician class license gives you remote control and radio
telemetry privileges in some parts of the bands. As to cheap
> radios, after you get your license visit a hamfest, you can pick
up bricks like the good ol htx-202 with a busted lcd cheap, and who
> cares if the display is shot if you want to play packet or monitor
a remote weather station or control some new experimental gizmo.
> Experimentation is encouraged in the ham bands (within the
frequency ranges designated for experimental/digital/remote/et.al.)
> provided you have the license.
>
>
From: "christopher41877" <CHRIS@
> > Can you use ham radios to send signals? I was thinking more
along
> > the lines of morse code. I know that it's easier to interpret
> > pulses instead of voice communication and that's why I was
thinking
> > of cheap radios. Thanks for the info.
> >
> > Chris
> >
> >
> > --- In basicstamps@yahoogroups.com, "FalconWireless Tech
Support -
> > KF4HAZ" <techsupport@f...> wrote:
> > > GMRS requires a $75.00 License for the operator at each end,
FRS
> > does not.
> > > However I am uncertain as to the use of digital communication
on
> > those bands.
> > > Ham radio allows for digital modes and licensing is a mere
$6.00
> > to take the exam.
> > >
> > > That being said, you would need a "COR" signal coming from the
> > receiver to recognize the presence of an unmodulated carrier to
> > > implement the method you described.
> > > I have had some success in using "Direct FSK" but the range
tends
> > to be less than that of a voice signal, DTMF provides a bit more
> > > range, but slows the throughput.
> > > If speed vs. bandwidth dictates there a devices known
as "TNC's"
> > which are radio modems that allow digital serial data to be sent
> > > over distances equal to or greater than that of voice using the
> > same radio equipment.
> > >
> > > - KF4HAZ -
> > >
> > >
From: "christopher41877" <CHRIS@
> > > > Has anyone ever tried using two of those 5-mile radios (I
think
> > they
> > > > are GRMS) to communicate between two stamps. Could it be as
> > simple
> > > > as putting a relay to transmit across the push-to-talk
button to
> > > > transmit. Maybe have the transmitting stamp put out X
amount of
> > > > pulses and the receiving stamp can decode those pulses. Does
> > anyone
> > > > have any experience with this or know where I can get more
> > > > information?
> > > >
> > > > Thanks,
> > > >
> > > > Chris
> >
> >
> > To UNSUBSCRIBE, just send mail to:
> > basicstamps-unsubscribe@yahoogroups.com
> > from the same email address that you subscribed. Text in the
Subject and Body of the message will be ignored.
> >
> >
> > Your use of Yahoo! Groups is subject to
http://docs.yahoo.com/info/terms/
> >
> >
because there is no monthly service.
--- In basicstamps@yahoogroups.com, Dave Evartt <davee@a...> wrote:
> We use ham radio extensivly for digital communications.
> There is lots of hardware out there for the HAM from simple
> radio modems, aka TNCs to things the PSK31 and a host of
> other protocols. In fact ham radio has been doing wireless
> data communications since it's inception in the early days
> of radio.
>
> The biggest problem lies inthe fact that high speed
> communications is almost non existant in the HAM bands. Most
> of it is in te 1200 baud or below range because there are
> legal limitations to bandwidths and most of the high speed
> stuff is not done in the ham bands. We do do amatuer TV,
> Slow Scan TV and a number of other high bandwidth protocols,
> but almost all the ham based data transmissions are done at
> a fairly low speed due to these bandwidth limitations. If
> you can live with 9600 baud, there are a number of options
> available to all hams, technician class and above. 9600 baud
> is pretty good unless you plan on sending lot's of graphics,
> in which case, you'll just have to wait. For graphics, it's
> better to send via ATV on a seperate channel. If you're
> planing relativly short range communications, there are a
> number of commercial options available to you. By the time
> you pay for all the hardware, you'd probably be better off
> using a comercial venue. A cellular modem is small and not
> as expesive as some other options, but you pay for the
> service.
>
> If you operate in the 0-500 foot range, I would suggest
> using wireless ethernet. There are ethernet modules that can
> be plugged into the stamp and those can be connected to
> wireless 802.11b or 802.11g adaptors that are readily
> available. These offer high bandwidth capabilities that the
> stamp will not push. Look at the wireless game adaptors for
> the xbox and playstation from Linksys. They're fairly
> bulletproof, cheap and don't require any licensing to
> operate.
> --
> Regards
>
> Dave Evartt
> American Hovercraft
south-pole-expedition using 40watts on 80meters,
Australia using 10w on 40 meters, and have made digital 9600 baud connections on
6 meters with 150watts over a 250 mile distance.
for more info on getting started see
http://www.remote.arrl.org/hamradio.html
or simply start at www.arrl.org and browse around
- KF4HAZ -
From: "christopher41877" <CHRIS@
> Fantastic, but two more questions since I have little knowledge of
> ham radios. 1, what is the range? 2, where can I get more
> information on getting a license?
>
> Thanks,
>
> Chris
>
>
> --- In basicstamps@yahoogroups.com, "FalconWireless Tech Support -
> KF4HAZ" <techsupport@f...> wrote:
> > Yes a Technician class license gives you remote control and radio
> telemetry privileges in some parts of the bands. As to cheap
> > radios, after you get your license visit a hamfest, you can pick
> up bricks like the good ol htx-202 with a busted lcd cheap, and who
> > cares if the display is shot if you want to play packet or monitor
> a remote weather station or control some new experimental gizmo.
> > Experimentation is encouraged in the ham bands (within the
> frequency ranges designated for experimental/digital/remote/et.al.)
> > provided you have the license.
> >
> >
From: "christopher41877" <CHRIS@
> > > Can you use ham radios to send signals? I was thinking more
> along
> > > the lines of morse code. I know that it's easier to interpret
> > > pulses instead of voice communication and that's why I was
> thinking
> > > of cheap radios. Thanks for the info.
> > >
> > > Chris
> > >
> > >
> > > --- In basicstamps@yahoogroups.com, "FalconWireless Tech
> Support -
> > > KF4HAZ" <techsupport@f...> wrote:
> > > > GMRS requires a $75.00 License for the operator at each end,
> FRS
> > > does not.
> > > > However I am uncertain as to the use of digital communication
> on
> > > those bands.
> > > > Ham radio allows for digital modes and licensing is a mere
> $6.00
> > > to take the exam.
> > > >
> > > > That being said, you would need a "COR" signal coming from the
> > > receiver to recognize the presence of an unmodulated carrier to
> > > > implement the method you described.
> > > > I have had some success in using "Direct FSK" but the range
> tends
> > > to be less than that of a voice signal, DTMF provides a bit more
> > > > range, but slows the throughput.
> > > > If speed vs. bandwidth dictates there a devices known
> as "TNC's"
> > > which are radio modems that allow digital serial data to be sent
> > > > over distances equal to or greater than that of voice using the
> > > same radio equipment.
> > > >
> > > > - KF4HAZ -
> > > >
> > > >
From: "christopher41877" <CHRIS@
> > > > > Has anyone ever tried using two of those 5-mile radios (I
> think
> > > they
> > > > > are GRMS) to communicate between two stamps. Could it be as
> > > simple
> > > > > as putting a relay to transmit across the push-to-talk
> button to
> > > > > transmit. Maybe have the transmitting stamp put out X
> amount of
> > > > > pulses and the receiving stamp can decode those pulses. Does
> > > anyone
> > > > > have any experience with this or know where I can get more
> > > > > information?
> > > > >
> > > > > Thanks,
> > > > >
> > > > > Chris
> > >
> > >
> > > To UNSUBSCRIBE, just send mail to:
> > > basicstamps-unsubscribe@yahoogroups.com
> > > from the same email address that you subscribed. Text in the
> Subject and Body of the message will be ignored.
> > >
> > >
> > > Your use of Yahoo! Groups is subject to
> http://docs.yahoo.com/info/terms/
> > >
> > >
>
>
> To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
> from the same email address that you subscribed. Text in the Subject and Body
of the message will be ignored.
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
One more thing about Ham Radio. I do not know what your application is.
Amateur Radio Communications is for non commercial use only. If you want to use
it
to monitor a commercial remote site, it is not allowed. If you want to monitor
a remote site for personal use then it is a great application for Ham Radio.
Just wanted to make that point.
Alan Bradford N1YMQ
Plasma Technologies
In a message dated 12/2/2003 12:12:05 PM Eastern Standard Time,
CHRIS@R... writes:
I am using a 2-way pager modem right now but I liked the radio idea
because there is no monthly service.
[noparse][[/noparse]Non-text portions of this message have been removed]
If it is for business use the options are MURS or a business band license.
Either way you go Chris, keep in mind that your circuit will need to monitor the
COR signal to ensure the frequency is not in use
before it PTT's and burps out it's data.
Lonnie Underwood - KF4HAZ -
From: <plasmastamp@a
> Hi Chris,
> One more thing about Ham Radio. I do not know what your application is.
> Amateur Radio Communications is for non commercial use only. If you want to
use it
> to monitor a commercial remote site, it is not allowed. If you want to monitor
> a remote site for personal use then it is a great application for Ham Radio.
> Just wanted to make that point.
>
> Alan Bradford N1YMQ
> Plasma Technologies
>
> In a message dated 12/2/2003 12:12:05 PM Eastern Standard Time,
> CHRIS@R... writes:
> I am using a 2-way pager modem right now but I liked the radio idea
> because there is no monthly service.