Jerry Avins wrote:
> Eric Jacobsen wrote:
>> 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.
>
> A bandwidth of 80 XHz at a frequency of 70 XHz is pretty extreme at for
> any value of X.
>

That's a pretty normal scenario for us ultrasound guys :-)

Well, ok, technically I have ventured away from ultrasound a bit the
last year. Did some industrial electronics design, almost feels like a
vacation.

--
Regards, Joerg

http://www.analogconsultants.com/

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