---------- Forwarded message ----------
From: ton ph <address@hidden>
Date: Wed, Apr 13, 2011 at 11:14 AM
Subject: Re: [Discuss-gnuradio] Guide : what is the value of the IF converted before feeding the ADC in usrp/gnuradio
To: "Marcus D. Leech" <address@hidden
Thanks Marcus for your immediate reply. Now i have a DBSRX and WBX daughterboard , how can i know in what IF it is converted before the ADC, is there any other means to check the IF intake of the ADC ? ...
One more thing i would like to know is that , does the IF converted is the same for all the frequencies and bands ?
Thanks Marcus for ur concern.
On Tue, Apr 12, 2011 at 4:43 PM, Marcus D. Leech <address@hidden>
On 04/12/2011 04:44 AM, ton ph wrote:It depends on the daughtercard in use, but most daughtercards
> Hi everyone ,
> I would like to know what is the actual last converted IF frequency
> which is actually fed to the ADC in usrp/gnuradio , since ADC rate is
> 64MS/s , I hope it IF should be less than 2xSampling rate of ADC,
> which implies IF could not be 70Mhz. So what is the value of IF before
> entering the ADC and what speed rate does the baseband is fed to the
> ADC for samping.
> Thanks in advance and also i apologize for any errrormatic information
> in my post.
down-convert the desired center
frequency to a complex baseband, centered at 0Hz.
There are execeptions. The original TV_RX used an IF of 5.75MHz, which
was converted to complex
baseband (I and Q) in the FPGA with a DDC.
Shirleys Bay Radio Astronomy Consortium
Discuss-gnuradio mailing list
# Life is the most precious phenomenon ever happen ...
# Lets pray and give emotional strength to the innocent brave victims of japan.