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[Discuss-gnuradio] aUaUaUaUaUaU and requested rx frequency not supported
From: |
sakulkar |
Subject: |
[Discuss-gnuradio] aUaUaUaUaUaU and requested rx frequency not supported problem |
Date: |
Fri, 11 May 2012 19:08:38 +0200 (CEST) |
User-agent: |
SquirrelMail/1.4.15 |
Hi Everybody,
I am using USRP with daugherboard of range 1MHz to 250MHz. I am running
the program with gnu-radio 3.6.0 on Ubuntu 11.10. I am trying to run the
basic fm receiver program as shown in the video.
http://www.youtube.com/watch?v=KWeY2yqwVA0
Whenever I try to execute the code, I get following things on grc. I have
double checked that the daughterboard works for the range. When I see the
fft plot of the received signal I see that I have just noise all around.
The hardware does not support the requested RX frequency:
Target frequency: 100.000000 MHz
Actual frequency: -28.000000 MHz
aUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaU
I have also tried to see if the antenna choices are correct. I checked it
with uhd_usrp_probe
The important part of the result was
RX Subdev: AB
| | | | Name: Basic RX (0x0001) - AB
| | | | Antennas:
| | | | Sensors:
| | | | Freq range: -250.000 to 250.000 Mhz
| | | | Gain Elements: None
| | | | Connection Type: IQ
| | | | Uses LO offset: No
| | | _____________________________________________________
| | | /
| | | | RX Subdev: BA
| | | | Name: Basic RX (0x0001) - BA
| | | | Antennas:
| | | | Sensors:
| | | | Freq range: -250.000 to 250.000 Mhz
| | | | Gain Elements: None
| | | | Connection Type: QI
| | | | Uses LO offset: No
So, when I try to work with uhd_fft. I got same problem with following
results
uhd_fft --spec B:AB
linux; GNU C++ version 4.6.1; Boost_104601; UHD_003.004.001-39-unstable
-- Opening a USRP1 device...
-- Using FPGA clock rate of 64.000000MHz...
Using Volk machine: ssse3_64
UHD Warning:
The hardware does not support the requested RX frequency:
Target frequency: 100.000000 MHz
Actual frequency: -28.000000 MHz
Could you help me out here?
Thanks in advance.
-- Pranav Sakulkar
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