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Re: [Discuss-gnuradio] problem on transmitting signal

From: Marcus D. Leech
Subject: Re: [Discuss-gnuradio] problem on transmitting signal
Date: Fri, 08 Apr 2011 12:16:06 -0400
User-agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv: Gecko/20110303 Thunderbird/3.1.9

On 08/04/2011 10:30 AM, Thomas H Kim wrote:
Hi all,

I'm transmitting a packet to 2.4G band using RFX2400 on USRP1 and observed this problem:
Once in a while, the transmission stops in the middle of the packet being transmitted.

Does anyone know if 1) there is any TX amp control line which is controlled by the FPGA and in what condition it toggles,
Any transmit power control will be under control of the software--the FPGA doesn't make spontaneous decisions about that.

2) if it can happen when USRP underrun (uU) occurs
When the host-side underruns the transmitter, it must necessarily transmit 0s, which effectively turns off the transmitter for the
  duration of the underrun.

3) if there is a schematic for RFX2400 and usrp1 available?
Schematics available here:


I'm using gnuradio 3.2.2.

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