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Re: [Discuss-gnuradio] WBX power level
From: |
Jason Abele |
Subject: |
Re: [Discuss-gnuradio] WBX power level |
Date: |
Mon, 14 Jun 2010 11:10:38 -0700 |
On Mon, Jun 14, 2010 at 11:03 AM, Jason Abele <address@hidden> wrote:
>>>> Hi All,
>>>>
>>>> Has anyone measure the power level coming out of their WBX board?
>>>>
>>>> Measured on a Gigatronics 8541 microwave
>>>> power meter connected directly at the back of the USRP2 I am getting
>>>> (with a CW carrier)
>>>>
>>>> 100 MHz about 35 mW
>>>> 1.3 GHz about 15 mW
>>>>
>>>> Ettus quote
>>>>
>>>> 50 - 100 mW< 1.2 GHz
>>>> 30 - 70mW> 1.2 GHz
>>>>
>>>> I know measuring power is notoriously inaccurate but I was wondering
>>>> what others have found.
>>>>
>>>> Setup USRP2 WBX UHD
>>>>
>
> Please try the following command with non-UHD for comparison:
>
> usrp_siggen_gui.py -x 250k -i 64 --tx-gain=25 -A 1.0 -f 1.3G
My mistake here, please use -i 16 ...
usrp_siggen_gui.py -x 250k -i 16 --tx-gain=25 -A 1.0 -f 1.3G
>
> You should see about 50mW (17dBm) at 1.30025GHz
>
> If you change the final argument to 100M you should see around
> 80-100mW (19-20dBm) in the tone at 100.25MHz
>
> If you can confirm those numbers, perhaps we have a constant scalar
> missing in either your flowgraph or the UHD code someplace.
>
> Thanks
> Jason
>
- [Discuss-gnuradio] WBX power level, Charles Brain, 2010/06/12
- Re: [Discuss-gnuradio] WBX power level, Philip Balister, 2010/06/12
- Re: [Discuss-gnuradio] WBX power level, Charles Brain, 2010/06/12
- Re: [Discuss-gnuradio] WBX power level, Timothy R. Newman, 2010/06/12
- Re: [Discuss-gnuradio] WBX power level, Charles Brain, 2010/06/15
- Re: [Discuss-gnuradio] WBX power level, Eric Blossom, 2010/06/15
- Re: [Discuss-gnuradio] WBX power level, Charles Brain, 2010/06/15
- Re: [Discuss-gnuradio] WBX power level, Jason Abele, 2010/06/15