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

Kevin Hung cykhung at gmail.com
Tue Nov 7 14:01:53 EST 2017


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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