USRP2 Lo Frequency Change

GNU Radio
1

Hello All,

As always thanks for the help.

I was doing some timing measurements the other day and was wondering if
this
seemed reasonable to you all. I did a simple setup in GRC where I had a
toggle switch that changed the frequency the usrp used as an LO. I input
a
constant of 1 into the USRP2 block and then hooked the usrp2 to a
highspeed
oscilliscope. I used the toggle switch to change the lo frequency back
and
forth and with the aid of a stopwatch I saw that the change took about
1.2
seconds to take affect. Is 1.2 seconds a reasonable or expected amount
of
time? Or is this more indicative of something else?

Thanks,
Justin

2

It appears that the server went down yesterday. I don’t know if anyone
recieved these messages. I apologize for any Deja vu this causes. Please
see
the following:

---------- Forwarded message ----------
From: Justin B. [email protected]
Date: Tue, Nov 30, 2010 at 11:35 AM
Subject: USRP2 Lo Frequency Change
To: [email protected]

Hello All,

As always thanks for the help.

I was doing some timing measurements the other day and was wondering if
this
seemed reasonable to you all. I did a simple setup in GRC where I had a
toggle switch that changed the frequency the usrp used as an LO. I input
a
constant of 1 into the USRP2 block and then hooked the usrp2 to a
highspeed
oscilliscope. I used the toggle switch to change the lo frequency back
and
forth and with the aid of a stopwatch I saw that the change took about
1.2
seconds to take affect. Is 1.2 seconds a reasonable or expected amount
of
time? Or is this more indicative of something else?

Thanks,
Justin