Wednesday, December 19, 2012

How to extend the range of a video baby monitor?

Q. Does anyone know how to extend the range of a video baby monitor? Our monitor is 900mhz. We live in an old building full of steel and concrete so the signal doesn't go well between rooms and is lost entirely between the baby room and the master bedroom. There are boosters for wifi networks so I would assume there is some technology or the same one that would work for baby monitors.

A. Take a power booster and uplink the connection to the communication antenna but dont forget to bypass the firewall and that should work.


How can I improve my signal strength with a 900mhz wireless video baby monitor?
Q. We recently purchased a wireless video baby monitor, and although it does work, there is significant interference in the signal due to my computer room with several PC's and servers. Is there a way to boost this signal to compensate for the interference, or to set up a repeater for the signal?

A. If you have interference any sort of repeater or amplifier will only repeat and / or amplify the interference (noise) along with the desired transmission (signal). The problem is likely a signal to noise ratio problem and interference.

I presume you have done all you can with repositioning the units to make them closer together without getting closer to the interference. If not try that

With the electronic interference it becomes even more difficult to address. A baby monitor is nothing more than a microphone in the baby's room and a speaker in the monitoring room linked wirelessly. Can you use a wired system? This may be your only practical choice. Perhaps a 5 MHz


Can your neighbors listen in on your phone conversations with a baby monitor ?
Q. If you're on your cordless phone in your home? I've heard that its possible for neighbors with baby monitors to do this to their neighbors, and I wouldn't think this would work, unless my cordless phone acts as a monitor.

A. It's possible if the phone and the monitors work in the same broadcast frequency.

Most do not, however. Modern cordless phones operate in the 2.4ghz wavelength, and older ones operate in the 900mhz wavelength (the newest ones operate in the 5.2ghz wavelength, but don't worry about those).

Most baby monitors work in the 300-900mhz wavelength, so a few of them *can* pick up on older cordless phones, but those that do are few and far between... especially becase every phone and monitor is coded to only pick up a very specific frequency around their specified range... so crosstalk is less likely.


listen to other cell phone conversations with a device?
Q. how is it possible to pick up cell phone conversations with a device, or a baby monitor.

A. Only analog cell phone conversations can be intercepted with a scanner. And almost no one has analog phones anymore. The newer CDMA or GSM phones use digital encoding techniques that prevent the casual listener from intercepting the conversations.

Baby monitors will NEVER overhear cell-phone conversations. Baby monitors operate at 900MHz or 2.4GHz; cell phones do NOT operate in those frequencies. However, home cordless phones DO operate in those frequencies, and these are the conversations that are often overheard by baby monitors. Newer cordless phones use the same digital encoding used by cell phones, so a new phone won't be overheard by a baby monitor.





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