[MLB-WIRELESS] A question for the Amateur Radio freaks

David Ng nudge at d2.net.au
Thu Nov 20 23:54:55 EST 2003

Here's what the tranceivers run at:
ISM Band: 433,050 - 434,790 MHz
(centre frequency 433,920 MHz)

The tranceivers will be used outdoors -- its actually part of a vacation
scholarship im undertaking over the summer.

I'm designing a wireless telemetry system for my university's Formula SAE
race car, so as the car whizzes around the track, the telemetry system sends
data about the car back to the pits in real-time.  Data such as
acceleration, speed, suspension deflection, etc will be collected via
sensors, passed through a microcontroller then finally formatted and
packetised for transmission.

The thing is, they could take the car out for testing almost anywhere.  In
fact, this years race meet is somewhere in South Australia if I'm not

I've taken a look at the bandplans and repeater lists, there looks like
there could be some interference with some FM repeater stations.  Lucky
there doesn't appear to be any overlapping repeaters near Monash Uni (where
I'm developing the prototype).

I guess I will just have to play around with them and see how they go, the
system I'm designing is only going to be a prototype anyway.  Its something
that will definately have to be taken into account as the project takes off.

Anyway, thanks for the info.


----- Original Message -----
From: "David" <vk3jda at optushome.com.au>
To: "David Ng" <nudge at d2.net.au>
Sent: Wednesday, November 19, 2003 7:38 PM
Subject: Re: [MLB-WIRELESS] A question for the Amateur Radio freaks

> At 23:13 17/11/03, you wrote:
> >Hi all,
> >
> >This is slightly OT, but:
> >I'm in the process of obtaining some Radiometrix UHF FM Radio Packet
> >Controllers, which work at 433MHz (SP2-433-160 -
> >http://www.radiometrix.com/html/products/sp2.html).
> >I've checked out the frequency allocations and it states that the band is
> >used for Amateur Radiolocation in Australia, which is good (seeing as
> >what these babies are used for).
> >
> >However, after scoping around the internet, I've read that I could run
> >some problems running these devices in Australia, as the 433MHz segment
> >also used by the Amateur Radio Service for Repeater Use or something
> >similar.
> >
> >Anyone familiar with the 433MHz band?  Will there be a significant chance
> >that these devices could be affected by interference from other
> >(non-Radiometrix) devices?
> Yes not so much if only used indoor more change if used out door you need
> to know what Freq. (433.???MHz) they are on.
> If you go to the WIA seb site the is a repeater band plane which lists the
> freq. pairs used and where it is.
> David VK3JDA
> >Thanks,
> >nudge.
> >
> >
> >
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>            David
>            VK3JDA
>            Webmaster M&DRC
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