[Fourlanders] IPX/U.FL Dummy Loads?

[Bryan W3CP]

Hi Brian,

One last idea: try using SNMP on the 192.168.100.1 interface to set the
ifAdminStatus = down for the WiFi interface. You will need to walk ifTable
and use ifDescr to identify the interfaces. Comcast may have rules in place
to block access to this MIB, but it is worth a try. If this is the case,
you might be able to access after power-cycling the modem with the coax
disconnected (so it cannot receive the config files that sets up the rules
to block access). Net-SNMP is an open source tool you could try.

73,
Bryan

On Sun, May 31, 2020 at 1:41 AM Paul Yeager <pyeager56 at gmail.com> wrote:

> Brian:
>
> Glad you discovered Ubiquiti.
>
> I use their products for APs and point to point links all over the ski
> area.  Great product! On a more complex installation, their management
> software is a godsend!
>
> 73 de W4SKI
>
>
> On Sat, May 30, 2020, 5:57 PM Brian McCarthy <brian at rfacres.com> wrote:
>
>> Hi Ted,
>>
>> I would never get all that stuff to fit back into the case. I was typing
>> the other response when you sent this.
>>
>> Your suggestions do lead me up a probable compromise, if simply
>> unplugging the antennas is not enough attenuation. I could leave those
>> internal antennas disconnected and put the gateway into it own Faraday
>> cage. I would need to be pretty careful with the coax, ethernet and power
>> connections to not allow any stray radiation. I would also need to
>> ventilate it well enough to not kill it with heat. Those seem like easier
>> problems to solve than fitting stubs and dummy loads into a tight case.
>>
>> Thanks!
>> Brian
>> NX9O
>>
>>
>> On Sat, May 30, 2020 at 5:35 PM Ted Wood <ted at k4k.pw> wrote:
>>
>>> What about an IPX to SMA adapter cable like this:
>>>
>>> https://www.amazon.com/GP-Electric-Pigtail-Antenna-Coaxial/dp/B06Y6CB2SX
>>>
>>> in to an SMA dummy load like this:
>>>
>>>
>>> https://www.amazon.com/DHT-Electronics-coaxial-connector-Termination/dp/B00BXUYDMM
>>>
>>> 73,
>>> Ted
>>>
>>>
>>> On Sat, 30 May 2020 09:15:01 -0400
>>> Brian McCarthy <brian at rfacres.com> wrote:
>>>
>>> > Here's an odd question, has anyone here on the list ever seen a
>>> > source for IPX/U.FL dummy loads?
>>> >
>>> > Here's my challenge...
>>> >
>>> > I am trying to completely mute the WiFi signals coming out of an
>>> > Xfinity XB7 Gateway. Disabling the WiFi in the software does not mute
>>> > all signals. Setting the gateway into bridge mode does not mute all
>>> > the signals. This device is still pumping out 3 hidden SSID with 3
>>> > unique MAC addresses on 2.4GHx channel 1. It is messing with the
>>> > balance of my home Ubiquiti WiFi mesh network.
>>> >
>>> > I would be using a third party cable modem, but I can save $20/month
>>> > by renting the Xfinity box. (The box rental is $20/month but comes
>>> > with unlimited data. To subscribe to unlimited data is $40/month.)
>>> >
>>> > Looking up the FCC ID and reviewing the internal photos of this
>>> > gateway, I see 6 wireless antennas. They are all connected with the
>>> > tiny surface mount connectors typical inside modern WiFi devices.
>>> > They look like:
>>> >
>>> > [image: image.png]
>>> > [image: image.png]
>>> >
>>> > I will try just popping the connectors off surface mount sockets, but
>>> > I an not sure that will give me enough attenuation of the
>>> > transmitter. If I could clip some small (inexpensive) dummy loads
>>> > onto those connectors, it should reduce leakage even more.
>>> >
>>> > I would appreciate suggestions and sources.
>>> >
>>> > Thanks!
>>> > Brian
>>> > NX9O
>>> > involuntary network administrator at RF Acres.
>>> _______________________________________________
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>>> Sent to: rfacres at gmail.com
>>>
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