[USRP-users] TX power levels. Long term exposure.

Kyeong Su Shin ksshin at uw.edu
Tue Nov 7 14:18:47 EST 2017


It will act as a RF shield. (see:
https://en.wikipedia.org/wiki/Electromagnetic_shielding )

Not a recommended way to protect yourself from strong EM waves, but it does
make a good joke.

Regards,
Kyeong Su Shin

On Tue, Nov 7, 2017 at 11:01 AM, Kevin Hung via USRP-users <
usrp-users at lists.ettus.com> wrote:

> Hmm, I am just curious. What does the metal hat do?
>
> On Mon, Nov 6, 2017 at 11:38 PM, Dan CaJacob via USRP-users <
> usrp-users at lists.ettus.com> wrote:
>
>> But if you want to have some fun with your co-workers. Put on a metal hat
>> whenever you TX. If they ask what's going on, say "Don't worry about it" :)
>>
>> On Mon, Nov 6, 2017 at 4:49 PM Bakshi, Arjun via USRP-users <
>> usrp-users at lists.ettus.com> wrote:
>>
>>> Thanks for clearing that up.
>>>
>>>
>>> AB
>>> ------------------------------
>>> *From:* Nick Foster <bistromath at gmail.com>
>>> *Sent:* Monday, November 6, 2017 3:58:05 PM
>>> *To:* Bakshi, Arjun
>>> *Cc:* usrp-users at lists.ettus.com
>>> *Subject:* Re: [USRP-users] TX power levels. Long term exposure.
>>>
>>> Don't worry about it. You are several orders of magnitude below any sort
>>> of permissible exposure limit.
>>>
>>> Nick
>>>
>>> On Mon, Nov 6, 2017 at 11:21 AM Bakshi, Arjun via USRP-users <
>>> usrp-users at lists.ettus.com> wrote:
>>>
>>> I'm looking to do long duration experiments in a lab which will have
>>> people in it while I TX and Rx, and I'd like to know what health and safety
>>> concerns I should keep in mind.
>>>
>>>
>>> I tried looking at FCC and EU for limits on radiation levels, but those
>>> specs aren't straightforward to understand. It's also difficult to get an
>>> estimate of absolute power rxed/txed from the USRPs. So I'd like to hear
>>> from anyone who knows about this stuff.
>>>
>>>
>>> I'm using SBX (max power 100mW), and I'm thinking of using either the
>>> 500-700MHz or the 1.2-1.3 GHz band. I'll be transmitting for *5ms every
>>> second for a few hours*. The room is about 6m x 15m. Then antennas will
>>> be 1-2 meters away from a few people. TX and RX are about 4m apart. With
>>> gain set to 25dB, my signal has ~30dB SNR.
>>>
>>>
>>> Sorry if this seems a bit odd/specific.
>>>
>>>
>>> Thank you,
>>>
>>>
>>> AB
>>>
>>>
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>> --
>> Very Respectfully,
>>
>> Dan CaJacob
>>
>> _______________________________________________
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>> USRP-users at lists.ettus.com
>> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
>>
>>
>
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