Wednesday, April 24, 2013

What is the difference between 5.8 gighrtz and 6.0 gighrtz?

Q. What is the difference between a phone that has 5.8 giga hertz and 6.0 giga hertz?

A. I think that you are asking in relation to cordless phones... In which case, there are NO 6.0Ghz cordless phones... there is however DECT 6.0 phones, which operate in the 1.9Ghz range...

When it comes to radio frequencies, the lower the frequency, the further the range, as long as all other factors remain the same. 900Mhz phones would in theory have the best range, however, they operate at lower transmitting power then other cordless phones.

From best (range, battery life, etc) to worse:

DECT 1.9Ghz - best range, least interference, unlicensed radio spectrum dedicated strictly for cordless telephones.

2.4 Ghz - next best range, however this unlicensed radio spectrum is crowded with wifi, wireless video cameras, and various other wireless consumer devices, and therefore subject to increased interference.

5.8Ghz - unlicensed radio spectrum, not as crowded as 2.4Ghz but also may contain other consumer electronics. range is limited compared to 2.4Ghz and DECT phones.

900Mhz - no security, can be listened in on any radio scanner ("police scanner") unless equipped with DSS. least range of all currently available cordless phones. Many consumer electronics such as baby monitors, and wireless intercom and doorbell systems, and garage door openers operate within this frequency range.

1st Gen cordless phones (aprox 48Mhz) - poorest range, no security, can be listened in on with a radio scanner, also shares unlicensed frequencies with baby monitors. Limited frequencies. No longer commercially available, however some (very few) of these phones are still in use.


Which baby monitor should I buy?
Q. Hello!
My daughter is 4 months old and realized we've not got a baby monitor! I don’t want to be spending too much but after some research I see there is a huge difference in prices from about $30 - $200s.
So what would you recommend, I want a video monitor which doesn't need to have lots of fancy features, only a reliable one.

Thanks!

A. I really searched about baby monitors before we bought ours. So here are my tips:

Before buying one,
Think what you need:
Do you want a video or sound only monitor? Do you want motion sensor feature etc.

Know your house and neighborhood, and other wireless devices:
Are walls thick, and do you live in a place with lots of parents. If so select a long range one with multichannel option. If not you will always experience interference problems. Chose a digital baby monitor!


I've been using a video one called Motorola MBP36 - its really good actually and has night vision which is a definite plus, it looks a bit like a really big ipod, which is kind of cool. I live in a house with thick walls and use it with no problem and even in long range the sound and video is very clear. It has many other features too like night vision and temperature alarm.

So I really recommend you to buy a motorola mbp36 baby monitor as I’m very happy with it.


Baby video monitors - Is LED (light-emitting-diode) safe for babies?
Q. As I know, the LED (light-emitting-diode) lights on the baby so that we can see our baby at night time. But I wonder if I use the monitor for a long time, is the LED harmful or absolutely safe for my baby?
Does anybody know?
Thanks.

A. The emissions (light) from the LED that allow your camera to pick up an image in the "dark" are in the infrared range of the spectrum. No harmful effects would be expected from light in this range, and in any case the emissions from such a webcam-light are of much lower intensity than infrared emissions from a standard 100w lightbulb. So there shouldn't be any worries about safety.





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