[Discuss-gnuradio] Fwd: Problem in uhd_fft

[Karan Talasila]

---------- Forwarded message ----------
From: Karan Talasila <address@hidden>
Date: Sat, Jun 29, 2013 at 6:44 PM
Subject: Re: [Discuss-gnuradio] Problem in uhd_fft
To: "address@hidden" <address@hidden>

Hi Josh,

            I am using USRP 1.   I am using a sma-bulkhead cable from Tx_A of basic tx daughter board and similarly a sma-bulkhead cable from Rx_A terminal of the Basic Rx daughter board. and then i am connecting a sma-sma cable from usrp transmitter to a coupler on powerline cable. Similarly I am connecting a sma-sma cable from usrp receiver to another coupler on the powerline cable.

so in all I am using 2 usrp 1, 2 sma-sma cables, 2 sma-bulkhead cable and two couplers. Please let me know if i am not clear with the description. Thank you.

On Sat, Jun 29, 2013 at 11:24 AM, Josh Blum <address@hidden> wrote:

On 06/27/2013 09:44 AM, Karan Talasila wrote:
> Hi,
>       I am using a basic tx and basic rx daughterboard for transmission and
> reception. The spec says basic tx and basic rx run from 0 to 250 MHz. But
> when i run transmitter and check the uhd_fft at receiver, after 32 Mhz,
> there is no signal. If i set the transmitter frequency in my flowgraph as
> 33 MHz, I don't get a signal at 33 Mhz, But when i enter frequency as
> -31Mhz in the uhd_fft i get a received signal on my fft. why does this
> happen? If it's in the range of daughter board it should be receiving it at
> that particular frequency right.
>
>

Can you tell me more about the cabling setup? Which ports of the Basic
TX and RX are you using, and how are they connected via SMA cable?

-josh

>
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Regards
Karan Talasila

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Regards
Karan Talasila