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Re: [Discuss-gnuradio] WBX and frequencies around 433 MHz?
From: |
Nick Foster |
Subject: |
Re: [Discuss-gnuradio] WBX and frequencies around 433 MHz? |
Date: |
Mon, 5 Dec 2011 11:38:20 -0500 |
On Mon, Dec 5, 2011 at 10:50 AM, Patrik Eliardsson
<address@hidden> wrote:
> Hi,
>
> While I was testing the DQPSK-(de)modulation blocks in GRC. I found a
> frequency region where the reception failed. I started with the ISM-band (433
> MHz) as the center frequency, and the reception didn't work. After checking
> my code several times I decided to change the center frequency to 2 GHz and
> everything started to work. So I tried several other center frequencies with
> successful outcome, for example 2 GHz, 1.5GHz, 800MHz, 500MHz, 420MHz. If I
> tuned the frequency to the 430-440 MHz region the reception fails.
What does the FFT of the received data look like at 433MHz? 420MHz?
--n
>
> I've used 2 USRP2s with the WBX and connected them with a cable and 20 dB
> attenuator.
>
> I have 4 different WBX cards and the result is the same for each of them.
>
> Have someone encountered the same problem with frequencies around 433 MHz?
>
> Br,
> Patrik
>
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