Cruisers Forum
 


Join CruisersForum Today

Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on Cruisers Forums. Advertise Here
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 07-10-2017, 09:48   #1
Registered User

Join Date: Aug 2015
Location: Port Townsend, WA
Boat: Tashiba-31
Posts: 321
Images: 1
WIFI hotspot onboard location

I'm setting up a wifi router on board and am thinking of the best location. I would like to install it in the nav center, which means it will be within inches of the VHF radio. I'm thinking this shouldn't be a problem. Can anyone confirm that?
__________________

dmksails is offline   Reply With Quote
Old 07-10-2017, 09:57   #2
Registered User
 
transmitterdan's Avatar

Join Date: Oct 2011
Boat: Valiant 42
Posts: 5,882
Re: WIFI hotspot onboard location

It should not be a problem. The frequencies are vastly different between wifi and VHF. Plus wifi is very low power. I predict there will be no problem.
__________________

transmitterdan is online now   Reply With Quote
Old 07-10-2017, 10:08   #3
Registered User

Join Date: Apr 2013
Posts: 931
Re: WIFI hotspot onboard location

If that will also be the site for your wifi antennae I would power on and "dry fit" the device and run a quick test from distance with the excellent Speedtest app by Ookla - this way you know what dock or shore performance will be. Speedtest is $5 or something.

Testing with VHF powered off and then on for TX and Receive will let you test for variations on your boat with your electromag characteristics. I would test in two rounds: with everything you can think of turned off -- then everything turned on to include every possible interference source - the autopilot, navis, the engine (alternator).

A second person down the dock can run the Speedtests.
SecondBase is offline   Reply With Quote
Old 07-10-2017, 10:25   #4
Registered User

Join Date: Aug 2009
Location: between the devil and the deep blue sea
Boat: a sailing boat
Posts: 18,335
Re: WIFI hotspot onboard location

No problem. VHF is different frequency.

WARNING: I have read at least once that a new (AC) router can affect gps reception. I looked at the frequencies and they seem different.

Maybe someone more techy can step in and tell us if wifi and gps can in fact interfere.

b.
barnakiel is offline   Reply With Quote
Old 07-10-2017, 13:50   #5
Registered User
 
Cavalier's Avatar

Join Date: Dec 2010
Location: Houston, TX
Boat: Beneteau 461 47'
Posts: 926
Images: 1
Re: WIFI hotspot onboard location

Quote:
Originally Posted by barnakiel View Post
No problem. VHF is different frequency.



WARNING: I have read at least once that a new (AC) router can affect gps reception. I looked at the frequencies and they seem different.



Maybe someone more techy can step in and tell us if wifi and gps can in fact interfere.



b.


..not necessarily more techy, but definitely more dorky:



WiFi typically operates at 2.4GHz (802.11b,g,n), and 5GHz (802.11ac). Note that the 2.4band operates between 2.4-2.5GHz, whereas the 5band actually operates in the 5.725-5.875GHz range.



GPS signals are as follows:

L1 1.57543GHz (10.23 x 154)

L2 1.2276GHz (10.23 x 120)

L3 1.38105GHz (10.23 x 135)

L4 1.379913GHz (10.23 x 121)

L5 1.17645GHz (10.23 x 115)



Note that the GPS signals are very specific and are based around the multipliers of 1.023million chips/s for C/A (civilian) band and 10.23milliom chips/s for P (military) band. L1 is mixed C/A and P, whereas L2 is solely P.



Also note that there is no common multiple between the WiFi and GPS signal frequencies by design.



The only thing you should need to consider putting in place would be standard filters/chokes on the power inputs to the WiFi AP to limit interference through the electrical supply.



Sent from mTalk
__________________
"By day the hot sun fermented us; and we were dizzied by the beating wind. At night we were stained by dew, and shamed into pettiness by the innumerable silences of stars."
Cavalier is offline   Reply With Quote
Old 07-10-2017, 14:25   #6
Registered User

Join Date: Dec 2010
Location: W Carib
Boat: Wildcat 35, Hobie 33
Posts: 11,961
Re: WIFI hotspot onboard location

Frequencies not likely a problem, but what about RF from router/power supply? Good thing to test.

Ive got an hub and a booster within a few meters of SSB, VHF, etc, no problems, but both run off direct DC power.

(My inverter makes a little RF hum, but my BlueSky 3000i makes a LOUD high pitch right on the SSB frequency I use the most...plan to install a switch at the nav station to shut it off when using SSB.)
belizesailor is online now   Reply With Quote
Old 07-10-2017, 14:30   #7
Registered User

Join Date: Jul 2017
Posts: 188
Re: WIFI hotspot onboard location

My advice would be to wall mount it so the antennas are at cabin window/companionway height to give a solid signal in the cockpit and on deck. If you are using a ubiquiti bullet or similar up the mast for your internet connection below, consider turning off the 2.4 radio inside and use 5 there assuming all your hardware supports 5. Much less busy bands so typically faster. Good luck.
Alberg30Shill is offline   Reply With Quote
Old 07-10-2017, 14:41   #8
Registered User
 
lifgun's Avatar

Join Date: Feb 2015
Location: Europe
Boat: Luffe 45
Posts: 65
Re: WIFI hotspot onboard location

My experience is that I normally not really use the VHF and the WiFi at the same time..... and if - then itís the handheld VHF....
lifgun is offline   Reply With Quote
Old 07-10-2017, 14:41   #9
Registered User
 
DeepFrz's Avatar

Cruisers Forum Supporter

Join Date: Mar 2006
Location: Winnipeg
Boat: None at this time
Posts: 8,431
Re: WIFI hotspot onboard location

Quote:
Originally Posted by SecondBase View Post
If that will also be the site for your wifi antennae I would power on and "dry fit" the device and run a quick test from distance with the excellent Speedtest app by Ookla - this way you know what dock or shore performance will be. Speedtest is $5 or something.

Testing with VHF powered off and then on for TX and Receive will let you test for variations on your boat with your electromag characteristics. I would test in two rounds: with everything you can think of turned off -- then everything turned on to include every possible interference source - the autopilot, navis, the engine (alternator).

A second person down the dock can run the Speedtests.
+1. A sea trial would also be in order.
DeepFrz is online now   Reply With Quote
Old 07-10-2017, 15:10   #10
Registered User
 
Cavalier's Avatar

Join Date: Dec 2010
Location: Houston, TX
Boat: Beneteau 461 47'
Posts: 926
Images: 1
Re: WIFI hotspot onboard location

Quote:
Originally Posted by belizesailor View Post
Frequencies not likely a problem, but what about RF from router/power supply? Good thing to test.



Ive got an hub and a booster within a few meters of SSB, VHF, etc, no problems, but both run off direct DC power.



(My inverter makes a little RF hum, but my BlueSky 3000i makes a LOUD high pitch right on the SSB frequency I use the most...plan to install a switch at the nav station to shut it off when using SSB.)
If the OP uses a 12V (or 24V) PoE injector then the AP can be run directly from DC, getting around issue of possible attempting to run the AP via the AC adapter it came with.. It'll avoid the typically noisy AC/DC cheap transformer issue! Still a RF choke on the input wouldn't hurt..

Sent from mTalk
__________________
"By day the hot sun fermented us; and we were dizzied by the beating wind. At night we were stained by dew, and shamed into pettiness by the innumerable silences of stars."
Cavalier is offline   Reply With Quote
Old 07-10-2017, 15:44   #11
Registered User

Join Date: Dec 2010
Location: W Carib
Boat: Wildcat 35, Hobie 33
Posts: 11,961
Re: WIFI hotspot onboard location

Quote:
Originally Posted by Cavalier View Post
If the OP uses a 12V (or 24V) PoE injector then the AP can be run directly from DC, getting around issue of possible attempting to run the AP via the AC adapter it came with.. It'll avoid the typically noisy AC/DC cheap transformer issue! Still a RF choke on the input wouldn't hurt..

Sent from mTalk
...and the cheap transformers are extremely inefficient. Thats why I look for small electronics with direct 12V or 5V (USB) input.

(meant router not hub in my post)
belizesailor is online now   Reply With Quote
Old 07-10-2017, 16:31   #12
Registered User

Join Date: Aug 2009
Location: between the devil and the deep blue sea
Boat: a sailing boat
Posts: 18,335
Re: WIFI hotspot onboard location

I run our routers at 12V.

They vary fom 20V to 12V nominal and only the 20V refuses. The 15V models do just fine.

Some routers run on 5V but then you need to step down which is an inconvenience, if the lesser one.

Cheers,
b.
barnakiel is offline   Reply With Quote
Old 07-10-2017, 16:52   #13
Registered User

Join Date: Jul 2017
Posts: 188
Re: WIFI hotspot onboard location

Quote:
Originally Posted by Cavalier View Post
If the OP uses a 12V (or 24V) PoE injector then the AP can be run directly from DC, getting around issue of possible attempting to run the AP via the AC adapter it came with.. It'll avoid the typically noisy AC/DC cheap transformer issue! Still a RF choke on the input wouldn't hurt..

Sent from mTalk
Looking at the gauge of 12v wire to my tiller pilot, I doubt you could pull even close to that thru a wire in a Cat 5e cable. PoE is great for a mast top router like a bullet but I don't see it working for an autopilot.
Alberg30Shill is offline   Reply With Quote
Old 08-10-2017, 05:35   #14
Registered User
 
Cavalier's Avatar

Join Date: Dec 2010
Location: Houston, TX
Boat: Beneteau 461 47'
Posts: 926
Images: 1
Re: WIFI hotspot onboard location

Quote:
Originally Posted by Alberg30Shill View Post
Looking at the gauge of 12v wire to my tiller pilot, I doubt you could pull even close to that thru a wire in a Cat 5e cable. PoE is great for a mast top router like a bullet but I don't see it working for an autopilot.
When were we ever discussing autopilots?

On a WiFi thread, AP means "Access Point". I guess I should have been clearer not to (accidentally) blend acronyms.
__________________
"By day the hot sun fermented us; and we were dizzied by the beating wind. At night we were stained by dew, and shamed into pettiness by the innumerable silences of stars."
Cavalier is offline   Reply With Quote
Old 08-10-2017, 08:56   #15
Registered User

Join Date: Jul 2017
Posts: 188
Re: WIFI hotspot onboard location

Quote:
Originally Posted by Cavalier View Post
When were we ever discussing autopilots?

On a WiFi thread, AP means "Access Point". I guess I should have been clearer not to (accidentally) blend acronyms.
Ahh, sorry. Had just been reading about auto pilots. I know what an access point is :-) sorry for the blunder :-)
__________________

Alberg30Shill is offline   Reply With Quote
Reply

Tags
wifi

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Wifi hotspot rhbush Marine Electronics 21 11-12-2015 13:46
Satellite WIFI Hotspot simonpickard Marine Electronics 4 12-02-2014 21:21
Location for Onboard Power Components StringBimini Electrical: Batteries, Generators & Solar 4 01-01-2012 14:30
Mac + 4g Hotspot with GPS WoundedWarrior Marine Electronics 5 06-05-2011 07:11

Advertise Here


All times are GMT -7. The time now is 09:05.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.