Per-
> I also have a xcvr2450 that won't lock sometimes. This is at 2.4GHz.
>
> Also an issue about IQ imbalance:
>
> I am measuring IQ imbalance. The values are generally quite good.
> However, one thing I don't understand is that the mirror frequency
> doesn't turn up on exactely "-f" but a few
On 04/16/2010 12:42 AM, Per Zetterberg wrote:
I am measuring IQ imbalance. The values are generally quite good.
However, one thing I don't understand is that the mirror frequency
doesn't turn up on exactely "-f" but a few Hertz off. I don't get this.
Are we sure that the down-conversion on the FP
I also have a xcvr2450 that won't lock sometimes. This is at 2.4GHz.
Also an issue about IQ imbalance:
I am measuring IQ imbalance. The values are generally quite good.
However, one thing I don't understand is that the mirror frequency
doesn't turn up on exactely "-f" but a few Hertz off. I do
Hi Matt
>Yes, -9 dBm is safe.
Glad to know it was all safe re input levels.
>I have not seen the problem locking without trying a lower frequency.
>What if you try 5 GHz twice in a row?
The problem with the not locking to 5G is very intermittent. A few times
when it did occur, I tried your sug
On 04/11/2010 11:09 PM, Ian Holland wrote:
Hi Matt
Can you please confirm by input level you are referring to the input to
the transceiver daughterboard? I am using the XCVR2450, for over-the-air
reception. The input level (to the XCVR2450 at the receiver) would have
been roughly:
Tx Power (max
: Ian Holland
Cc: discuss-gnuradio@gnu.org
Subject: Re: [Discuss-gnuradio] IQ imbalance...
As long as the input level is in the safe range, having too much gain
would probably not damage anything. On the WBX, however, too much gain
with a strong but normally safe level might be a problem.
Matt
: Ian Holland
Cc: discuss-gnuradio@gnu.org
Subject: Re: [Discuss-gnuradio] IQ imbalance...
On 04/08/2010 09:16 PM, Ian Holland wrote:
Hi All
I am using a pair of USRP2s, each equipped with a XCVR2450, for
transmission over-the-air of an RRC-filtered BPSK signal. The Tx
antenna has 3dBi gain, and the
...@ettus.com]
Sent: Friday, 9 April 2010 11:37 PM
To: Ian Holland
Cc: discuss-gnuradio@gnu.org
Subject: Re: [Discuss-gnuradio] IQ imbalance...
On 04/08/2010 09:16 PM, Ian Holland wrote:
> Hi All
>
> I am using a pair of USRP2s, each equipped with a XCVR2450, for
> transmission over-the-a
On 04/08/2010 09:16 PM, Ian Holland wrote:
Hi All
I am using a pair of USRP2s, each equipped with a XCVR2450, for
transmission over-the-air of an RRC-filtered BPSK signal. The Tx
antenna has 3dBi gain, and the Rx antenna has 18 dBi gain. The
transmitted signal is at maximum amplitude, with gain
