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From: | Hoang Nguyen Tran |
Subject: | Re: [Discuss-gnuradio] USRP1 warning "requested RX frequency is outside of the system range, requested RX frequency is outside of the system range, and has been clipped " even though inside hardware specification |
Date: | Sat, 15 Aug 2015 19:17:29 -0400 |
Hi Hoang,
the 380MHz is the lower frequency you can get with a RFX400. That's correct.
You can chose your daughterboard by using the number of channels argument (if you want both), or the subdev spec [1], like:
B:0
to select the WBX in your second slot.
Best regards,
Marcus
[1]http://files.ettus.com/manual/page_configuration.html#config_subdev
On 08/14/2015 12:21 PM, Hoang Nguyen Tran wrote:
Dear,
Sorry if I have too much question, I am getting started with GNU radio, and I did not find the answer for this on the Internet.
I have USRP1 and inside it has 2 daughter boards: WBX and RFX400.
I run the FM receiving grc file and got this
UHD Warning:
Tune Request: 102.500000 MHz
The ification:
Target Frequency: 102.500000 MHz
Clipped Target Frequency: 380.000000 MHz
The RF LO does not support the requested frequency:
Requested LO Frequency: 380.000000 MHz
RF LO Result: 400.000000 MHz
Attempted to use the DSP to reach the requested frequency:
Desired DSP Frequency: 20.000000 MHz
DSP Result: 20.000000 MHz
Successfully tuned to 380.000000 MHz
I changed various frequency and figure out the range that has Successfully tuned is from 380Mhz to 520Mhz.
I don't know why this happen, the WBX suppose to have range from 50Mhz to 2200Mhz. Does it come from the wrong firmware ?
And moreover, my USRP has 2 daughter board, so how can I choose exact daughter board to use ? In UHD USRP source of GNU radio. only have options for antenna port for example RX2 or TX/RX, right ?
Best regards,Hoang
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