On Wed, 1 Oct 2003 19:18:03 +1200, "Darren" <> wrote:
>
>"Bruce Simpson" <> wrote in message
>news:.. .
>> On Wed, 1 Oct 2003 18:37:13 +1200, "Darren" <> wrote:
>>
>> >I am the owner (dude) of www.dpt.co.nz
>> >
>> >I sell AA 2000mAh NiMh at $4 each,10 or more @ $3.75 each
>> >
>>
>> Do you realise that those wireless "spy" cameras are on an illegal
>> frequency?
>
>I have been told that they are NOT running on an illegal frequency.
>
Ah... but *who* told you?
I bet it wasn't anyone in the aviation industry or who is responsible
for policing the RF spectrum here in NZ right?
The GPS frequencies are:
L1 = 1.559 - 1.6025 GHz
L2 = 1.215 - 1.240 GHz
L5 = 1.164 - 1.188 GHz
The transmitters you're selling will operate on any of four
frequencies:
Channel 1 = 1.08 GHz
Channel 2 = 1.12 GHz
Channel 3 = 1.16 GHz
Channel 4 = 1.20 Ghz
So, as you can see, the Ch4 frequency lies between L5 and L2 and the
Ch3 frequency is just below L5.
Given that these transmitters are not particularly "clean" (built to a
price), they do tend to create quite a bit of sideband splatter that
will affect a nearyby GPS unit.
How do I know this?
Because I've got a 1500mW unit that I was planning to use in the
cruise missile project but as soon as you turn it on using Ch 3 or Ch
4 (even 100m away) the GPS drops out.
If you take a look at the NZ RF spectrum allocation table at:
http://www.med.govt.nz/rsm/planning/uhf.html
you'll see that the chunk of spectrum from 960 MHz through 1.215 GHz
is reserved for "Aeronautical radionavigation" -- including GPS and
DME.
Using these transmitters in NZ is very much illegal I'm afraid. You
ought to inform whoever it was that told you otherwise that they
really don't have a clue.
If you want to import these wireless cameras, I recommend that you
stick to the 2.4 GHz gear which operates in a license-free portion of
spectrum set aside for Short Range Devices which is detailed at:
http://www.med.govt.nz/rsm/licensing/gurls/gurl-srd.pdf
This indicates that you'll be able to sell and use equipment on the
2.4 GHz = 2.4835 GHz band with a maximum effective radiated power of 1
Watt.
--
you can contact me via
http://aardvark.co.nz/contact/