Bel STi XR - 432.000Mhz Leak Confirmed!

[fastnfurious80]

I understand that alot of devices emit the frequency of 432.000 Mhz, but after a few statements from people that it has been fixed on the newer A4M9 versions, it certainly hasnt.

I did a simple test last night with my radioshack scanner and with the STi XR turned on, the scanner locks on perfectly at exactly 432.000 Mhz with a perfectly clear signal.

Turn off the STi XR and the signal simply dissapear's. Back on, it locks on!


Thought I would share a real life test with you all.


Thankyou.

[leo68]

I understand that alot of devices emit the frequency of 432.000 Mhz, but after a few statements from people that it has been fixed on the newer A4M9 versions, it certainly hasnt.

I did a simple test last night with my radioshack scanner and with the STi XR turned on, the scanner locks on perfectly at exactly 432.000 Mhz with a perfectly clear signal.

Turn off the STi XR and the signal simply dissapear's. Back on, it locks on!


Thought I would share a real life test with you all.


Thankyou.

Other devices also operate at 432.000 Mhz and I don't think they will make a radar detector detector just to detect Bel STI. I think these devices are expensive?

[Road Warrior]

http://www.radarbusters.com/products...iver_tests.asp

So apparently it's you vs. Roy :?
Maybe some experts would jump in and bring some fresh details on this freaking 432 MHz "leakage"... so, can the current RDDs (Spectre 3 or 4) detect the STI's 432 MHz freq or not :shock: curious where the truth really stands...

[SmaartAasSaabr]

No the RDD's can't catch 432 MHz. This is a far away frequency from where RDD's normally look, which is 11 500 MHz to around 25 000 MHz according to Stealth Micro, but there appear to be "windows" of unscanned bandwidth between those points. Could they be modified to catch it? IMO no. But you could make a dedicated 432 MHz detector that has a normal Spectre built in or something like this. The box would be bigger though. Hopefully Bel gets off their butt and seals the leak before this can become an issue.

[microbb]

Look at his link:

http://www.wia.org.au/bandplans/Aust...%202005-10.pdf

It is part of the radio band plan for frequency spectrum in Australia. There is so much activity at 432MHz that even the amateur radio operators are assigned as a secondary service to use this frequency. So even they have to make sure they don't interfere with the primary rights users.

Just because you are sitting in your house with a scanner does not translate to developing a 70cm receiver that is to be used for law enforcement purposes worldwide. And it makes no economic sense to do it for down under only, the market is just not that big. This frequency is used in many places in the world by amateur radio operators running very high power(40Watts) in comparsion to the level of the Sti LO leakage.

See this link and notice all the radios and power outputs being sold.
http://www.prestigecom.net.au/defaul...u+&openmenu=20

microbb

[fastnfurious80]

Ok, I think we get the general idea. Forum Admins please close this thread.

Thankyou.

[Road Warrior]

No the RDD's can't catch 432 MHz. This is a far away frequency from where RDD's normally look, which is 11 500 MHz to around 25 000 MHz according to Stealth Micro... Hopefully Bel gets off their butt and seals the leak before this can become an issue.

Thanks a lot for clarification... now I can go to bed dreaming of Jessica Simpson as Marlyn Monroe next to me

And if, ever, the leak becomes a real issue, how can the STI be fixed, can be fixed or you just have to buy another one :?:

And btw, how this freaking 432 MHz "leakage" story did come up around, who the hell is here interested to give new ideas to that SMS :x

[WRC]

a video as posted a long time ago :idea:

[Ikaros]

You can shield STi with protective material/casing or reduce the leak with several other methods, so if it becomes an issue I am sure we can buy a solution. Personally with some preliminary testing I was able to reduce the detectability from 100ft down to 30ft with standard RF shielding material. So the solution for minimizing the leak is lurking behind the corner, its more a question of when and by whom it will be announced first ?

SMS must have been aware of this since it was first time on this board for months ago - or they are completely blind. Also they know by reading the above that it may be a rat race that is very difficult to win because the technology for shielding existis. Anyway the RDD for 432.000 may not come from SMS, rather from somewhere else as its way easier and cheaper to build. Personally I feel its good to keep the topic up until a solution is announced. Like said by several times on this group there is a lot of transmission on bands nearby, but when driving with 432.000 locked on not really much else is found. I would guess that use of 432.000 band depends on area where you live. The situation is completely different with 432.750, 433.000, etc. where one can immediately find a lot of traffic. Also in Aus the 432.000 center frequency seemed to be allocated to be fairly quiet and for EME only.

[D.E.T]

It is very easy to test if there is any other traffic in 432 MHz band.

1) Turn on Your scanner, set to AM mode

2) select 1 KHz step

3) save scanning freq from 432.000 to 432.020 to a bank (or just set to 432.000)
Adjust squelch lock just above base noise

4) this is important! use EXTERNAL antenna (not the telescope or other basic antenna)

5) drive around with Your scanner on (high volume ;c)

In the city area it´s not necessery to do testing - we know that there is a lot of traffic. But do it on the highway and minor roads outside city area and check what You find - or do You

And if You are very enthustiatic - park Your car beside the road and wait. When You got a signal - pull that car over and ask for STi