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Re: [Discuss-gnuradio] TX Gain parameter in uhd_siggen_gui
From: |
Marcus D. Leech |
Subject: |
Re: [Discuss-gnuradio] TX Gain parameter in uhd_siggen_gui |
Date: |
Mon, 08 Sep 2014 23:19:10 -0400 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.2.0 |
On 09/08/2014 11:13 PM, zealdeal wrote:
Thanks for the info. Can anybody please confirm whether the step size limit
of 0.5 dB is valid for USRP N200?
It's not the underlying motherboard, it's the daughter-cards. I think
all of WBX, SBX and CBX use a step attenuator with 0.5dB step size.
Others, I'm not sure about.
Generally, the "analog stuff" is on the daughtercards, and gain-setting
is definitely "analog stuff".
If you need fine-grained control over output power, you can vary the
magnitude of your baseband signals, where you have much-finer
control available. Although, I have to admit that, except for
certain laboratory experiments, power-control beyond 0.5dB granularity
is of very little use in any practical sense.
--
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