[Discuss-gnuradio] UHD warning: The Hardware does not support the requested RX sample rate

[Jorge Hernandez]

Hi,

I am working on a SISO link between two USRP2 based on OFDM. After trying the different examples available I am stuck on a warning that comes up over and over and I don't know how to solve it. I know it can be a pretty simple question but I've already checked the mailing list and I saw that the typical warning experimented by other people is due to the fact that they have an error in the configuration of the sample rate. It's my understanding that only integer divisor rates of the master clock is possible. (100Mhz/decimation = sample rate). Well, I think that my problem is not this one, because I am using a frequency of 1M. This is happening only in the transmitter side, in the receiver USRP2 I don't get any problem with the same sample rate configuration. I don't know if it is a hardware problem or it is maybe a compatibility problem. I'd really appreciate your help! Thank you in advance.

This is the message shown in the terminal:

linux; GNU C++ version 4.4.1 [gcc-4_4-branch revision 150839]; Boost_103900; UHD_003.003.000-283ff97

Payload length:    1500
Time out:    0.8
Burst length:    15
Modulation:    qpsk
Output sink:    file
Trellis coding:    False
Protocol type:    selective_repeat 

-- Opening a USRP2/N-Series device...
-- Current recv frame size: 1472 bytes
-- Current send frame size: 1472 bytes

UHD Warning:
    The hardware does not support the requested RX sample rate:
    Target sample rate: 1.000000 MSps
    Actual sample rate: 0.000512 MSps

Jorge Hernandez.