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

Dan CaJacob dan.cajacob at gmail.com
Tue Nov 7 15:31:00 EST 2017


It's a joke :)

On Tue, Nov 7, 2017 at 2:21 PM Kyeong Su Shin via USRP-users <
usrp-users at lists.ettus.com> wrote:

> 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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>>>>
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>>>>
>>> --
>>> Very Respectfully,
>>>
>>> Dan CaJacob
>>>
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>>> USRP-users at lists.ettus.com
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>>>
>>>
>>
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>>
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-- 
Very Respectfully,

Dan CaJacob
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