Motorola WU830G USB Wifi extend range - Page 2

Lone Flanger · 07-01-2005

That looks EXACTLY like the ZyXEL adapter I bought the other day. The only difference is that mine did not have a connector installed on it, but a blank spot for it on the board...exactly where that MMCX connector is right now on yours.

The trace on the PCB going from where the center conductor of the connector would be (on mine) did not connect to the rest of the circuit, however. There was a short trace going from the center which just had a gap after a few millimeters and then a resistor or a cap right after that gap going back to the rest of the antenna system. Besides the diversity and all that, it looked as if the resistor would have had to have been moved to get it to work. I don't have a decent SMD iron anymore so I didn't try to mod it.

Don't know if this helps, but this is what I found with my device and I'm almost positive they are the same. That board looks exactly like the one I saw the other day.

markshmid · 07-01-2005

Quote:

Originally Posted by wrzwaldo

@ markshmid,

Can you get a macro shot of that thing from the connector down to the area Thorn has marked? I have a closeup of that area but the f-tard testers put a unit test id number over the goods.

If possible can you get a good macro shot of these areas?

http://netstumbler.org/attachment.ph...tid=3851&stc=1

beakmyn · 07-01-2005

Looks like C109 needs to be flipped to become C209 and you'll need some decoupling capacitors also for C113 and C114

markshmid · 07-01-2005

Quote:

Originally Posted by Thorn

First, understand the diversity switch is a SWAG, based on looking at the traces. See the image below for what appears to be the DS. You may be able to ebable/disable it in the firmware. It may already be enabled.

Secondly, I wouldn't expect to see any increase in the signal (or very little) when the antenna is "right against a wireless router". I might possibley expect to see a damaged router however. Move the router some distance away, (like several rooms at a minimum) and try again.

Are you using proper tools to analyse the RSSI?

Finally, from you desciption of the board layout, I'm wondering if there is a integral antenna to the case? It sounds and looks like the "ANT2" circle is possibly a contact pad.

I was using Netstumbler. Is there anything better?

there is no other antenna although it does look like a contact pad.

If I cant get it to work via the firmware, how else can I get it to work?

wrzwaldo · 07-01-2005

Quote:

Originally Posted by markshmid

I was using Netstumbler. Is there anything better?

there is no other antenna although it does look like a contact pad.

If I cant get it to work via the firmware, how else can I get it to work?

There is another antenna! Look for Ant. 1

And I concur with beakmyn on enabling the connector.

Scruge · 07-01-2005

Quote:

Originally Posted by wrzwaldo

There is another antenna! Look for Ant. 1

And I concur with beakmyn on enabling the connector.

Looks like antenna 1 is the slotted part of the pca. You'll also find a couple of decoupling caps C11x (can't make them out) you could use for the antenna jack. Somewhere around here on another thread you can find info on the DS I posted. I think for testing purposes you can bias the switch using a resitor to lock it into one state, or in your case (ant 2).

Thorn · 07-02-2005

beakmyn's got it. Follow his information regarding getting the jack enabled.

Quote:

Originally Posted by markshmid

I was using Netstumbler. Is there anything better?

Huh, how did you get NS to work in a router?

Quote:

Originally Posted by markshmid

If I cant get it to work via the firmware, how else can I get it to work?

As far as enabling/disabling the diversity switch: What you want to do is disable it, and lock it to the antenna connected to the MMCX.

markshmid · 07-02-2005

Quote:

Originally Posted by beakmyn

Looks like C109 needs to be flipped to become C209 and you'll need some decoupling capacitors also for C113 and C114

ok - I am new to this. i did play with boards as a kid, but never somthing so small 1) how to you work with such small things - all i have is reguler solder iron. 2) what does "you'll need some decoupling capacitors also for C113 and C114" mean?

wrzwaldo · 07-02-2005

Quote:

Originally Posted by markshmid

ok - I am new to this. i did play with boards as a kid, but never somthing so small 1) how to you work with such small things - all i have is reguler solder iron. 2) what does "you'll need some decoupling capacitors also for C113 and C114" mean?

See post 21.

Thorn · 07-02-2005

Quote:

Originally Posted by markshmid1

how to you work with such small things - all i have is reguler solder iron.

Low heat/fine tip iron for SMT work
Tweezers
Magnifier/loup

wrzwaldo · 07-02-2005

Send lawyers guns and money!

streaker69 · 07-02-2005

Quote:

Originally Posted by wrzwaldo

Send lawyers guns and money!

I saw a werewolf drinking a pina colada at Trader Vic's

wrzwaldo · 07-02-2005

Quote:

Originally Posted by streaker69

I saw a werewolf drinking a pina colada at Trader Vic's

His hair was perfect!

Thorn · 07-02-2005

Quote:

Originally Posted by wrzwaldo

Send lawyers guns and money!

I've had that Location line for three weeks and you just noticed? It must be my stunning new avatar.

W.Z., R.I.P.

wrzwaldo · 07-02-2005

Quote:

Originally Posted by Thorn

I've had that Location line for three weeks and you just noticed? It must be my stunning new avatar.

W.Z., R.I.P.

Ditto!

Yeah the new avatar drew my attention to it.

07-01-2005	#18 (permalink)
beakmyn root\.workspace\.garbage. Join Date: Aug 2003 Posts: 4,765	Looks like C109 needs to be flipped to become C209 and you'll need some decoupling capacitors also for C113 and C114 __________________ It's not Intelligent Design, it's peer pressure. ┌──────────────────────────────┐ ╞ NS Icons Explained\|et hoc genus omne ╡ └──────────────────────────────┘

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07-01-2005	#16 (permalink)
Lone Flanger Registered Member Join Date: May 2005 Posts: 6	That looks EXACTLY like the ZyXEL adapter I bought the other day. The only difference is that mine did not have a connector installed on it, but a blank spot for it on the board...exactly where that MMCX connector is right now on yours. The trace on the PCB going from where the center conductor of the connector would be (on mine) did not connect to the rest of the circuit, however. There was a short trace going from the center which just had a gap after a few millimeters and then a resistor or a cap right after that gap going back to the rest of the antenna system. Besides the diversity and all that, it looked as if the resistor would have had to have been moved to get it to work. I don't have a decent SMD iron anymore so I didn't try to mod it. Don't know if this helps, but this is what I found with my device and I'm almost positive they are the same. That board looks exactly like the one I saw the other day.

07-02-2005	#26 (permalink)
wrzwaldo I amuse you? Join Date: Dec 2003 Posts: 9,127	Send lawyers guns and money!