Thanks Marcus for your reply.
>> Probably somewhere in the neighborhood of +7dBm, maybe a little more.
>> The LF/BASIC series have *no* gain in either path, so you're just
looked
at buffered ADC ouput.
So, ~ *+7dBm* is the max output power I supposed to get from the LFTX
daughterboard? How do I get that?
Since I am only getting -28.13 dBm, does that mean I have some issue
with my LFTX daughterboard?
Khalid
Output power is determined largely by baseband signal magnitude in that
case.
Message: 2
Date: Tue, 6 Jan 2015 10:13:45 -0330
From: "khalid.el-darymli" <khalid.el-dary...@mun.ca
<mailto:khalid.el-dary...@mun.ca>>
To: "Discuss-gnuradio@gnu.org <mailto:Discuss-gnuradio@gnu.org>"
<discuss-gnuradio@gnu.org <mailto:discuss-gnuradio@gnu.org>>
Subject: [Discuss-gnuradio] Max Output Power from the LFTX
daughterboard
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Hi,
What is the maximum output power from the LFTX daughterboard when used
with
the USRP N200?
According to this datasheet [1], the N200 with the WBX daughterbaord
provide an output power of 15 dBm. However, when using the LFTX
daughterboard, I am getting a much less output power.
[1]
http://www.ettus.com/content/files/07495_Ettus_N200-210_DS_Flyer_HR.pdf
In GNU Radio with the USRP N200, we use a sinusoid with a frequency of 150
kHz and an amplitude of 0.98, fed into the LFTX daughterboard for a center
frequency of 5 MHz. When the output of LFTX is plugged into a scope
terminated with a 50-ohm terminator, the scope reads 24.8 mV
(peak-to-peak). This is around -28.13 dBm.
Is this the max power one can get out of the LFTX daughterboard?
Thanks.
Best regards,
Khalid
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Message: 3
Date: Tue, 06 Jan 2015 08:48:08 -0500
From: "Marcus D. Leech" <mle...@ripnet.com <mailto:mle...@ripnet.com>>
To: discuss-gnuradio@gnu.org <mailto:discuss-gnuradio@gnu.org>
Subject: Re: [Discuss-gnuradio] Max Output Power from the LFTX
daughterboard
Message-ID: <54abe798.5060...@ripnet.com
<mailto:54abe798.5060...@ripnet.com>>
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On 01/06/2015 08:43 AM, khalid.el-darymli wrote:
> Hi,
>
> What is the maximum output power from the LFTX daughterboard when used
> with the USRP N200?
>
> According to this datasheet [1], the N200 with the WBX daughterbaord
> provide an output power of 15 dBm. However, when using the LFTX
> daughterboard, I am getting a much less output power.
> [1]
> http://www.ettus.com/content/files/07495_Ettus_N200-210_DS_Flyer_HR.pdf
>
> In GNU Radio with the USRP N200, we use a sinusoid with a frequency of
> 150 kHz and an amplitude of 0.98, fed into the LFTX daughterboard for
> a center frequency of 5 MHz. When the output of LFTX is plugged into a
> scope terminated with a 50-ohm terminator, the scope reads 24.8 mV
> (peak-to-peak). This is around -28.13 dBm.
>
> Is this the max power one can get out of the LFTX daughterboard?
>
>
> Thanks.
>
> Best regards,
> Khalid
Probably somewhere in the neighborhood of +7dBm, maybe a little more.
The LF/BASIC series have *no* gain in either path, so you're just looked
at buffered ADC ouput.
--
Marcus Leech
Principal Investigator
Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org
--
Marcus Leech
Principal Investigator
Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org
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