My way of increasing signal strength
- Thread starter IAAI
- Start date
IAAI
Very Senior Member
yeah, this can increase signal strength, but you get to a point where it becomes counter intuitive
you raise the power high enough, you will actually see throughput drop
and as already said more power means more heat
more heat means shorter usefull life span for the router
you raise the power high enough, you will actually see throughput drop
and as already said more power means more heat
more heat means shorter usefull life span for the router
A few comments here, the theory says that every time you double the power, that boosts your signal 3dBm. So if you start at 80mw, you have to go to 160mw to get that first 3dBm, and 320mw to get another 3dBm. So, yes, it does work to boost your transmitted power (up to a point), but keep these in mind:
1. Boosting the transmit power at your router does not boost the client's transmitted power. Since the protocols are two-way, the client's transmit power will limit its range. In other words, it doesn't matter that the client can hear the router if the router can't hear the client. That tends to mean that using better antennas is really a more practical way to extend the range of a router, since it increases both receive and transmit capabilities.
2. Watch the temperature of the radios...you can do this using the web admin GUI. Also, increasing the transmitted power can cause signal distortion after a certain point which does not help speed, just signal strength.
So, router signal strength is not the whole story here. You have to deal with client signal strength, heat, and signal quality as well.
1. Boosting the transmit power at your router does not boost the client's transmitted power. Since the protocols are two-way, the client's transmit power will limit its range. In other words, it doesn't matter that the client can hear the router if the router can't hear the client. That tends to mean that using better antennas is really a more practical way to extend the range of a router, since it increases both receive and transmit capabilities.
2. Watch the temperature of the radios...you can do this using the web admin GUI. Also, increasing the transmitted power can cause signal distortion after a certain point which does not help speed, just signal strength.
So, router signal strength is not the whole story here. You have to deal with client signal strength, heat, and signal quality as well.
sinshiva
Very Senior Member
high power over typical antennas has a habit of just blasting more noise than signal. then your neighbor calls the fcc on you, etc. just run at the rated power and let the grown ups figure out turning the noise into signal via firmware updates. in some cases, you can get better signal by dropping the power.
additionally, wireless broadcasts have a dead zone around the source becomes larger as the power increases, resulting in a lot of instability if the device is a few feet or less from the AP
additionally, wireless broadcasts have a dead zone around the source becomes larger as the power increases, resulting in a lot of instability if the device is a few feet or less from the AP
CooCooCaChoo
Senior Member
You get better returns tweaking your wireless settings to account for a crowded neighborhood, the structures surrounding the router, etc. As well as the placements of the antennae all without the risk of burning out your radios.
seth_space
Regular Contributor
Use the proven and cheap Windsurfer.
http://www.aegisarts.com/wifi/ez12.pdf
http://www.youtube.com/watch?v=YwW26jNWAQE
http://www.aegisarts.com/wifi/ez12.pdf
http://www.youtube.com/watch?v=YwW26jNWAQE
I actually tested tx power under dd-wrt on an E3000 about a year and a half ago
RMerlin would be familiar with the bandwidth_test script in the WDLXTV project
I had to pass a signal through some walls, etc ...
and wireless was my only options, so I exhausted all possible options, and ran the bandwidth_test for each
default for asus is 80
dd-wrt default, if I remember correctly was 100,
by the time I hit 120
actual test throughput was half of what it was at 100
I assume this has to do with signal to noise ratio, etc ...
but regardless, I found increasing tx power made the situation worse
RMerlin would be familiar with the bandwidth_test script in the WDLXTV project
I had to pass a signal through some walls, etc ...
and wireless was my only options, so I exhausted all possible options, and ran the bandwidth_test for each
default for asus is 80
dd-wrt default, if I remember correctly was 100,
by the time I hit 120
actual test throughput was half of what it was at 100
I assume this has to do with signal to noise ratio, etc ...
but regardless, I found increasing tx power made the situation worse
bluepoint
Very Senior Member
Yes, I noticed the 100mW effect on my N66u combined with 802.11d(regulation mode) enabled using SDK6 of Merlin's .35_2/.35_4. According to inSSIDer I gained 8-10dB on both bands. Take note, I didn't see the effect of the changes until 48 hrs. so yes, give the router time to adjust.hey ,
i ll cut to the chase , if you are getting a bad WiFi signal try 100mW in Tx power adjustment
it's the last option under wireless > professional
----
plz give me your feedback
seth_space
Regular Contributor
As is stated in the links thiggins posted:
Wireless communication works in two directions, there is no use having your access point transmit with higher power when your client (computer, pad or whatever) still transmits with the same (low) power.
To get increased range you must increase the power in BOTH END.
If you can't hear me because the distance is to large, it doesn't help that YOU start screaming, you still won't hear me better...
Wireless communication works in two directions, there is no use having your access point transmit with higher power when your client (computer, pad or whatever) still transmits with the same (low) power.
To get increased range you must increase the power in BOTH END.
If you can't hear me because the distance is to large, it doesn't help that YOU start screaming, you still won't hear me better...
seth_space
Regular Contributor
nerre, your right.
But there is a addition to this.. The way beamforming works is in need of a connection.
Your example:
If you shout hard the other party knows where you are and is able to direct it's output in that direction.
https://en.wikipedia.org/wiki/Beamforming
But there is a addition to this.. The way beamforming works is in need of a connection.
Your example:
If you shout hard the other party knows where you are and is able to direct it's output in that direction.
https://en.wikipedia.org/wiki/Beamforming
Beamforming requires that the client device support it. This is because it uses a channel sounding technique.
Actually, An Experiment In Wireless Power And Range says that increasing only router transmit power can increase range. It all depends on the starting point for router power.
The experiment in the article changed power levels by doubling and halving, i.e. +/- 3dB. They also used a lower signal level—50% of the router and client's normal transmit power level—as the baseline.
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