Wireless alarm signal boost????

[st.jimmy05]

Hi guys,

Got this cheeky little wireless alarm system going, now i live in a 3 story town house, have sensors 1st, 2nd, 3rd, master unit on 2nd mid passage between the two stair cases (if you know what i mean) take the unit away from the top of the 1st floor stairs (mid passage) towards the bottom of stairs leading to 3rd floor, wont pick up the "door" contacts, but will the PIR sensors???? and same applies if the order was reversed for the upstairs (3rd floor) sensors????

Had the main unit apart, with wire attached to the 2 solid copper wires "ANT" and a "spring" type what i can only assume is an "ANT" because both the door contacts and PIRS have one, only the PIRS a thicker and longer. I also used the aerial off of a wireless cctv receiver and that made no difference on what wire or spring it touched.

can someone help me out here, it's doing my nut!! i moved the unit slight closer to the 1st floor, it picked them up sitting on my switched on central heating radiator and the 3rd floor, picked it up some 2-3 foot and screwed to wall and now won't pick up 1st floor door contacts, only difference was i had the back of the unit off.

any help much appreciated!!

[stj]

Re: Wireless alarm signal boost????

find out what frequency it uses, and you can calculate the optimum wire length.

[st.jimmy05]

Re: Wireless alarm signal boost????

hi, thanks STJ

I've read your advice and according to the manual the frequency is 433MHz/315MHz and encoded mode 2262 / 4.7MΩ GSM 850/900/1800/100MHz

Can you advise on how to calculate, giving the answer would be spot on, explaining how you calculate these things would be even better.

and thank you for your input, very much appreciated!!

[stj]

Re: Wireless alarm signal boost????

you listed 6 frequency's!! what is the alarm exactly?
make, model?

[st.jimmy05]

Re: Wireless alarm signal boost????

STJ, Sorry mate unbranded. i think the actual frequencies used are the 433/315MHz as the other four are for the cellular option (alarm calls/texts you when activated)

So the signal frequencies i would assume are the first two.

my dad got one for the sheds etc, and his door contact picks up and it's further away but in a more line of sight, shed door and back door to go through. where as mine is mearly a stair case and it's in next room.

hope this helps in your helping me

[stj]

Re: Wireless alarm signal boost????

433 is around 70cm
you can use a half of that.

and keep all your antenna's in the same direction - vertical is best.

[st.jimmy05]

Re: Wireless alarm signal boost????

thanks stj

info much appreciated i'll let you know in a few days after i make some altercations as to whether it solved the issues or not.

It certainly seems as if the host is sitting on top of the light switch where the wires run, it wouldn't even pick the contact up from front door to top of stair case 1 until i moved it 2 feet left, clear line of sight almost, (2 steps left of the bottom of stairs is the door)

I know it's shite, but good at the same time, it works flawlessly for my uncle and dad. cheers pal

[st.jimmy05]

Re: Wireless alarm signal boost????

heres a link for the system i found on youtube pal

https://www.youtube.com/watch?v=ntO_a0pKQX0

@ 11.20 is what the door contacts look like inside. exact same system only i haven't got the smoke alarm stuff.

cheers