Failed to set RF frequency

GNU Radio
1

Hey all,

I am still checking out whether my USRP is working correctly in both
transmit and receive modes or not.

The problem is sometimes when i run the transmitter or receiver codes,
the
USRP fails to set the RF frequency of my transceivers, and at other
times it
works. I don’t know what is causing this error.

Could somebody suggest me a solution? -Tks

Bruhtesfa

2

On Fri, 2008-11-14 at 10:27 +0100, Bruhtesfa E. wrote:

I am still checking out whether my USRP is working correctly in both
transmit and receive modes or not.

The problem is sometimes when i run the transmitter or receiver codes,
the USRP fails to set the RF frequency of my transceivers, and at
other times it works. I don’t know what is causing this error.

Could somebody suggest me a solution? -Tks

You’ll need to be a lot more specific about your problem for anyone to
be able to help you.

-Johnathan

3

Ok, Thanks Johnathan!

It is like this:

My Tranceiver that I use together with the USRP works at 2.4-2.5GHz ,
then I
used $* python USRP_siggen.py -f 2.45e9 *.in order to generate a
carrier
of frequency 2.45GHz. But, it generates a run time error, “Failed to set
RF
frequency”.

So, what do you think is the problem? -Tks

Bruhtesfa

On Fri, Nov 14, 2008 at 4:44 PM, Johnathan C. <

4

On Mon, Nov 17, 2008 at 1:39 AM, Bruhtesfa E. [email protected]
wrote:

My Tranceiver that I use together with the USRP works at 2.4-2.5GHz , then I
used $ python USRP_siggen.py -f 2.45e9 .in order to generate a carrier of
frequency 2.45GHz. But, it generates a run time error, “Failed to set RF
frequency”.

In you previous email, you said that the command sometimes works and
sometimes doesn’t. Is there any pattern to it?

Have you tried setting any other frequencies?

-Johnathan

5

In you previous email, you said that the command sometimes works and
sometimes doesn’t. Is there any pattern to it?

There is no distinict pattern. How I am working it out currently is;
when the error apears, I turn the USRP off and turn it on again. In that
case, it works mostly. But, I was wondering if there is some way to
solve this error permanently.

Have you tried setting any other frequencies?

Ya! I have tried to set frequencies in the operating range of the
tranciever; but, the error keeps coming sometimes as I said.

bruhtesfa

6

On Mon, Nov 17, 2008 at 12:00 PM, Bruhtesfa E.
[email protected] wrote:

There is no distinict pattern. How I am working it out currently is;
when the error apears, I turn the USRP off and turn it on again. In that
case, it works mostly. But, I was wondering if there is some way to
solve this error permanently.

If the same command sometimes works and sometimes doesn’t, with no
other changes, and power cycling the hardware improves things, then
it’s a good chance you have a hardware issue. In the past I have
encountered frequency setting issues when the daughterboards weren’t
fully seated in the motherboard connectors securely, causing
intermittent connections to some daughterboard signals.

-Johnathan