View Full Version : Transmit Power NS2
Hi..
I just bought several Nanos i Spain and when I use my Butterfly Calibration instrument the power output at external antenna it :idea: just shows 20-21 dBm (100mW)
Has this something to do about the EU vers. or what can I do to increase the power to the announced 400mW?
Regards..
As far as I know, the only difference in a EU version is the power supply. Power restriction is handled by the "Obey Regulatory Power" under the Link Setup tab.
Try unchecking that box and run the power all the way up.
Personally, the Obey Regulatory Power selection is not the way to go, at least here in the United States, as it enforces a restriction where its not required.
UBNT-Mike.Ford
09-02-2008, 12:52 PM
Hello M5,
Where/how are you measuring the output power?
Thanks,
Mike
I was measuring the output power dbm with a Butterfly.
The result from the sma connector ended up with 20-21 dbm or about 100-126mw with external antenna turned on.
As<an example a Linksys wrt54gl with tomato shows 25 dbm true the RP-TNC connector, or about 316mw see picture NS2 example http://www.fotpleien.no/NS2.jpg
Regards,
M5 Even
I had heard that the Nano's have an issue with the external connector becuase of the loss on the PCB section between the radio and the SMA connector?
Would this be correct?
Dan
Its about 3 dB loss for the NS2 and about 5 dB loss for the NS5.
http://telecomanddata.com/NS5_backside_copyright.jpg
sweet as, thanks for that
I'm gonna rework mine with a piece of coax this weekend. Considering the hëll my Nanostations have been through...dog chewed the mounting bracket off one, other dog dragged it out in the field and a bull stepped on it, I don't think a soldering rework will hurt it.
laser3
12-07-2008, 07:01 AM
Any results on the test yet ? does anyone from UBNT care to comment on this issue, is there really a loss on the ext. connection due to lack of sheilding? and does it affect the internal ant. in any way
UBNT-Mike.Ford
12-08-2008, 12:57 PM
Hey Guys,
As stated previously, on NS5 you will lose ~3dB on the external connector. If the power loss is an issue you can switch to Bullet as these are designed from the ground up to use external connectors with 0 loss.
Thanks,
Mike
Hm.. measuring the output power dbm at Bullet2 gave the same result.
19-20 dBm..maybe the 19 because of using an N-Female bullet adapter between the Butterfly. Thought I maybe was mistaken so I tested 2 more in my badge of 20 units. Anyway, more power probably make more noise. I I’m satisfied with the UbiQuiti series anyway, it makes my installations more simple.
Pict. Bullet dBm test http://www.fotpleien.no/bullet.jpg
The Bullet 2 is listed as 20 dBm +/- 1 dB, so you are getting the correct power reading. A single N connector loss is negligible, that that skinny -195 cable has some loss.
UBNT-Mike.Ford
12-19-2008, 09:02 AM
Hello,
WHT is correct, Bullet 2 is specced at 20dB.
Thanks,
Mike
Thats right, I was sleeping in the hour reading the pdf.. :shock:
Any results on the test yet ? does anyone from UBNT care to comment on this issue, is there really a loss on the ext. connection due to lack of sheilding? and does it affect the internal ant. in any way
Oh...the loss is indeed there. My educated guess is the circuit trace was poorly designed. In circuits that use a trace for an RF path instead of a shielded coax jumper, the trace has a lot of bumps and squiggles to maintain proper impedance matching. It won't have any affect on the internal antenna.
