BA
Bakshi, Arjun
Mon, Nov 6, 2017 7:20 PM
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
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
NF
Nick Foster
Mon, Nov 6, 2017 8:58 PM
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@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
USRP-users mailing list
USRP-users@lists.ettus.com
http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
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@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
>
>
> _______________________________________________
> USRP-users mailing list
> USRP-users@lists.ettus.com
> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
>
BA
Bakshi, Arjun
Mon, Nov 6, 2017 9:49 PM
Thanks for clearing that up.
AB
From: Nick Foster bistromath@gmail.com
Sent: Monday, November 6, 2017 3:58:05 PM
To: Bakshi, Arjun
Cc: usrp-users@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@lists.ettus.commailto:usrp-users@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
USRP-users mailing list
USRP-users@lists.ettus.commailto:USRP-users@lists.ettus.com
http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
Thanks for clearing that up.
AB
________________________________
From: Nick Foster <bistromath@gmail.com>
Sent: Monday, November 6, 2017 3:58:05 PM
To: Bakshi, Arjun
Cc: usrp-users@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@lists.ettus.com<mailto:usrp-users@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
_______________________________________________
USRP-users mailing list
USRP-users@lists.ettus.com<mailto:USRP-users@lists.ettus.com>
http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
DC
Dan CaJacob
Tue, Nov 7, 2017 4:38 AM
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@lists.ettus.com> wrote:
Thanks for clearing that up.
AB
From: Nick Foster bistromath@gmail.com
Sent: Monday, November 6, 2017 3:58:05 PM
To: Bakshi, Arjun
Cc: usrp-users@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@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
USRP-users mailing list
USRP-users@lists.ettus.com
http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
USRP-users mailing list
USRP-users@lists.ettus.com
http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
--
Very Respectfully,
Dan CaJacob
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@lists.ettus.com> wrote:
> Thanks for clearing that up.
>
>
> AB
> ------------------------------
> *From:* Nick Foster <bistromath@gmail.com>
> *Sent:* Monday, November 6, 2017 3:58:05 PM
> *To:* Bakshi, Arjun
> *Cc:* usrp-users@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@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
>
>
> _______________________________________________
> USRP-users mailing list
> USRP-users@lists.ettus.com
> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
>
> _______________________________________________
> USRP-users mailing list
> USRP-users@lists.ettus.com
> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
>
--
Very Respectfully,
Dan CaJacob
KH
Kevin Hung
Tue, Nov 7, 2017 7:01 PM
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@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@lists.ettus.com> wrote:
Thanks for clearing that up.
AB
From: Nick Foster bistromath@gmail.com
Sent: Monday, November 6, 2017 3:58:05 PM
To: Bakshi, Arjun
Cc: usrp-users@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@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
USRP-users mailing list
USRP-users@lists.ettus.com
http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
USRP-users mailing list
USRP-users@lists.ettus.com
http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
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@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@lists.ettus.com> wrote:
>
>> Thanks for clearing that up.
>>
>>
>> AB
>> ------------------------------
>> *From:* Nick Foster <bistromath@gmail.com>
>> *Sent:* Monday, November 6, 2017 3:58:05 PM
>> *To:* Bakshi, Arjun
>> *Cc:* usrp-users@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@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
>>
>>
>> _______________________________________________
>> USRP-users mailing list
>> USRP-users@lists.ettus.com
>> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
>>
>> _______________________________________________
>> USRP-users mailing list
>> USRP-users@lists.ettus.com
>> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
>>
> --
> Very Respectfully,
>
> Dan CaJacob
>
> _______________________________________________
> USRP-users mailing list
> USRP-users@lists.ettus.com
> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
>
>
KS
Kyeong Su Shin
Tue, Nov 7, 2017 7:18 PM
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@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@lists.ettus.com> wrote:
Thanks for clearing that up.
AB
From: Nick Foster bistromath@gmail.com
Sent: Monday, November 6, 2017 3:58:05 PM
To: Bakshi, Arjun
Cc: usrp-users@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@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
USRP-users mailing list
USRP-users@lists.ettus.com
http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
USRP-users mailing list
USRP-users@lists.ettus.com
http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
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@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@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@lists.ettus.com> wrote:
>>
>>> Thanks for clearing that up.
>>>
>>>
>>> AB
>>> ------------------------------
>>> *From:* Nick Foster <bistromath@gmail.com>
>>> *Sent:* Monday, November 6, 2017 3:58:05 PM
>>> *To:* Bakshi, Arjun
>>> *Cc:* usrp-users@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@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
>>>
>>>
>>> _______________________________________________
>>> USRP-users mailing list
>>> USRP-users@lists.ettus.com
>>> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
>>>
>>> _______________________________________________
>>> USRP-users mailing list
>>> USRP-users@lists.ettus.com
>>> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
>>>
>> --
>> Very Respectfully,
>>
>> Dan CaJacob
>>
>> _______________________________________________
>> USRP-users mailing list
>> USRP-users@lists.ettus.com
>> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
>>
>>
>
> _______________________________________________
> USRP-users mailing list
> USRP-users@lists.ettus.com
> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
>
>
DC
Dan CaJacob
Tue, Nov 7, 2017 8:31 PM
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@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@lists.ettus.com> wrote:
Thanks for clearing that up.
AB
From: Nick Foster bistromath@gmail.com
Sent: Monday, November 6, 2017 3:58:05 PM
To: Bakshi, Arjun
Cc: usrp-users@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@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
USRP-users mailing list
USRP-users@lists.ettus.com
http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
USRP-users mailing list
USRP-users@lists.ettus.com
http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
--
Very Respectfully,
Dan CaJacob
It's a joke :)
On Tue, Nov 7, 2017 at 2:21 PM Kyeong Su Shin via USRP-users <
usrp-users@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@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@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@lists.ettus.com> wrote:
>>>
>>>> Thanks for clearing that up.
>>>>
>>>>
>>>> AB
>>>> ------------------------------
>>>> *From:* Nick Foster <bistromath@gmail.com>
>>>> *Sent:* Monday, November 6, 2017 3:58:05 PM
>>>> *To:* Bakshi, Arjun
>>>> *Cc:* usrp-users@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@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
>>>>
>>>>
>>>> _______________________________________________
>>>> USRP-users mailing list
>>>> USRP-users@lists.ettus.com
>>>> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
>>>>
>>>> _______________________________________________
>>>> USRP-users mailing list
>>>> USRP-users@lists.ettus.com
>>>> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
>>>>
>>> --
>>> Very Respectfully,
>>>
>>> Dan CaJacob
>>>
>>> _______________________________________________
>>> USRP-users mailing list
>>> USRP-users@lists.ettus.com
>>> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
>>>
>>>
>>
>> _______________________________________________
>> USRP-users mailing list
>> USRP-users@lists.ettus.com
>> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
>>
>>
> _______________________________________________
> USRP-users mailing list
> USRP-users@lists.ettus.com
> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
>
--
Very Respectfully,
Dan CaJacob
KH
Kevin Hung
Tue, Nov 7, 2017 11:06 PM
Now I am very tempted to try it out and see how many coworkers believe the
metal hat.
On Tue, Nov 7, 2017 at 3:31 PM, Dan CaJacob dan.cajacob@gmail.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@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@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@lists.ettus.com> wrote:
Thanks for clearing that up.
AB
From: Nick Foster bistromath@gmail.com
Sent: Monday, November 6, 2017 3:58:05 PM
To: Bakshi, Arjun
Cc: usrp-users@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@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
USRP-users mailing list
USRP-users@lists.ettus.com
http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
USRP-users mailing list
USRP-users@lists.ettus.com
http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
--
Very Respectfully,
Dan CaJacob
Now I am very tempted to try it out and see how many coworkers believe the
metal hat.
On Tue, Nov 7, 2017 at 3:31 PM, Dan CaJacob <dan.cajacob@gmail.com> wrote:
> It's a joke :)
>
> On Tue, Nov 7, 2017 at 2:21 PM Kyeong Su Shin via USRP-users <
> usrp-users@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@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@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@lists.ettus.com> wrote:
>>>>
>>>>> Thanks for clearing that up.
>>>>>
>>>>>
>>>>> AB
>>>>> ------------------------------
>>>>> *From:* Nick Foster <bistromath@gmail.com>
>>>>> *Sent:* Monday, November 6, 2017 3:58:05 PM
>>>>> *To:* Bakshi, Arjun
>>>>> *Cc:* usrp-users@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@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
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> USRP-users mailing list
>>>>> USRP-users@lists.ettus.com
>>>>> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
>>>>>
>>>>> _______________________________________________
>>>>> USRP-users mailing list
>>>>> USRP-users@lists.ettus.com
>>>>> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
>>>>>
>>>> --
>>>> Very Respectfully,
>>>>
>>>> Dan CaJacob
>>>>
>>>> _______________________________________________
>>>> USRP-users mailing list
>>>> USRP-users@lists.ettus.com
>>>> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
>>>>
>>>>
>>>
>>> _______________________________________________
>>> USRP-users mailing list
>>> USRP-users@lists.ettus.com
>>> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
>>>
>>>
>> _______________________________________________
>> USRP-users mailing list
>> USRP-users@lists.ettus.com
>> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
>>
> --
> Very Respectfully,
>
> Dan CaJacob
>
AB
Arjun Bakshi
Fri, Nov 10, 2017 7:04 PM
Wanted to further clarify something. Do you mean that a usrp will in most cases stay below acceptable levels, or that my specific setup is safe?
Like TX at 520mhz makes the snr much higher compared to that at 1.2GHz.
Thanks
AB
---- Bakshi, Arjun wrote ----
<!-- P {margin-top:0;margin-bottom:0;} -->
Thanks for clearing that up.
AB
From: Nick Foster bistromath@gmail.com
Sent: Monday, November 6, 2017 3:58:05 PM
To: Bakshi, Arjun
Cc: usrp-users@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@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
USRP-users mailing list
USRP-users@lists.ettus.com
http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
Wanted to further clarify something. Do you mean that a usrp will in most cases stay below acceptable levels, or that my specific setup is safe?
Like TX at 520mhz makes the snr much higher compared to that at 1.2GHz.
Thanks
AB
---- Bakshi, Arjun wrote ----
><!-- P {margin-top:0;margin-bottom:0;} -->
>
>Thanks for clearing that up.
>
>
>AB
>
>From: Nick Foster <bistromath@gmail.com>
>Sent: Monday, November 6, 2017 3:58:05 PM
>To: Bakshi, Arjun
>Cc: usrp-users@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@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
>
>
>
>_______________________________________________
>USRP-users mailing list
>USRP-users@lists.ettus.com
>http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
>
NF
Nick Foster
Fri, Nov 10, 2017 7:06 PM
There is nothing you can do with a USRP to expose you to harmful levels of
RF energy. You would need to add an amplifier.
On Fri, Nov 10, 2017 at 11:04 AM Arjun Bakshi bakshi.11@buckeyemail.osu.edu
wrote:
Wanted to further clarify something. Do you mean that a usrp will in most
cases stay below acceptable levels, or that my specific setup is safe?
Like TX at 520mhz makes the snr much higher compared to that at 1.2GHz.
Thanks
AB
---- Bakshi, Arjun wrote ----
Thanks for clearing that up.
AB
From: Nick Foster bistromath@gmail.com
Sent: Monday, November 6, 2017 3:58:05 PM
To: Bakshi, Arjun
Cc: usrp-users@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@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
USRP-users mailing list
USRP-users@lists.ettus.com
http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
There is nothing you can do with a USRP to expose you to harmful levels of
RF energy. You would need to add an amplifier.
On Fri, Nov 10, 2017 at 11:04 AM Arjun Bakshi <bakshi.11@buckeyemail.osu.edu>
wrote:
> Wanted to further clarify something. Do you mean that a usrp will in most
> cases stay below acceptable levels, or that my specific setup is safe?
>
> Like TX at 520mhz makes the snr much higher compared to that at 1.2GHz.
>
> Thanks
>
> AB
>
> ---- Bakshi, Arjun wrote ----
>
> Thanks for clearing that up.
>
>
> AB
> ------------------------------
> *From:* Nick Foster <bistromath@gmail.com>
> *Sent:* Monday, November 6, 2017 3:58:05 PM
> *To:* Bakshi, Arjun
> *Cc:* usrp-users@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@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
>
>
> _______________________________________________
> USRP-users mailing list
> USRP-users@lists.ettus.com
> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
>
>
