On 6/25/2009 5:10 AM, recoder wrote:
> On 25 Haziran, 10:59, "Sebastien @ Sundance"
> <maury.sebast...@gmail.com> wrote:
>> On Jun 24, 11:15 pm, recoder<kurtulmeh...@gmail.com> wrote:
>>
>>> We are used to process 70 Mhz IF by using ADC boards to interface to
>>> our fpga boards.
>>> Now we have to process the following signal:
>>> 720 Mhz IF
>>> qpsk modulated
>>> 80 mhz bandwith (3 dB)
>>> Can anybody recommend a board to interface the 720 Mhz IF to a FPGA
>>> board?
>> If you are looking at a complete system, you can check the SMT702 that
>> may do the job :http://www.sundance.com/web/files/pr...RFilter=SMT702
>>
>> - Sebastien
>
> Thank you for your recommendation but I think downconverting 720 mhz
> to 140 or 70 Mhz would be a better solution. I am looking for a board
> that can do the job.

You seem to be looking for a UHF to 70MHz downconverter. There are
lots of UHF tuners with 70MHz outputs, but many/most are for broadcast
applications and only support bandwidths up to about 8MHz.

You may be able to find something with a bandwidth as wide as you're
asking (80MHz), but I suspect you'll have to look around and it won't be
cheap. That's a pretty wide bandwidth and most applications don't need
or support that much.