FPGA Central

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?

recoder <kurtulmehtap@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?

You probably don't want a board. You probably want a
connectorized quadrature mixer, and a connectorized local
oscillator, with the mixer output feeding a dual ADC board.

Seek out an RF engineer to specify, assemble, and test this puppy.

Steve

On 24 Haziran, 23:52, spop...@speedymail.org (Steve Pope) wrote:
> 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?
>
> You probably don't want a board. *You probably want a
> connectorized quadrature mixer, and a connectorized local
> oscillator, with the mixer output feeding a dual ADC board.
>
> Seek out an RF engineer to specify, assemble, and test this puppy.
>
> Steve

Thanks, thats what I am looking for.
Does anybody know a module that can do the downconversion from 720 Mhz
to 70-140 Mhz IF?

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

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.

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.

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.
>

For parts this would be a good place to start:

http://www.mini-circuits.com/

--
Regards, Joerg

http://www.analogconsultants.com/

"gmail" domain blocked because of excessive spam.
Use another domain or send PM.

Eric Jacobsen <eric.jacobsen@ieee.org> wrote:

>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.

This is why I suggested a quadrature mixer down to baseband.
Then the output bandwidth is only ~40 MHz. A little googling
suggests such a connectorized component exists. Dunno about
the cost though.

Steve

On 25 Jun., 14:10, recoder <kurtulmeh...@gmail.com> 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.

something like a combo of ad8348 and adf4360-7 eval boards ?

-Lasse

Ettus Research might be a likely candidate...

http://www.ettus.com/order


langwadt@fonz.dk wrote:
> On 25 Jun., 14:10, recoder <kurtulmeh...@gmail.com> 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.
>
> something like a combo of ad8348 and adf4360-7 eval boards ?
>
> -Lasse

On Thu, 25 Jun 2009 18:01:02 +0000, Steve Pope wrote:

> Eric Jacobsen <eric.jacobsen@ieee.org> wrote:
>
>>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.
>
> This is why I suggested a quadrature mixer down to baseband. Then the
> output bandwidth is only ~40 MHz. A little googling suggests such a
> connectorized component exists. Dunno about the cost though.
>
> Steve

The quoted 80MHz bandwidth is the 3dB point, so they probably need more
than 40MHz.

Which doesn't much change your conclusion, aside from the fact that they
need to pay attention to their _real_ bandwidth constraints.

--
www.wescottdesign.com

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.

Jerry
--
Engineering is the art of making what you want from things you can get.
¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯ ¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯

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/

"gmail" domain blocked because of excessive spam.
Use another domain or send PM.

On 25 Haziran, 21:07, "langw...@fonz.dk" <langw...@fonz.dk> wrote:
> On 25 Jun., 14:10, recoder <kurtulmeh...@gmail.com> 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.
>
> something like a combo of * ad8348 and adf4360-7 *eval boards ?
>
> -Lasse- Alýntýyý gizle -
>
> - Alýntýyý göster -

Thank you, this seems to be a viable solution. The ad8348 has a
Demodulation bandwidth of 75 MHz. As our signal is 82 Mhz wide we are
not sure if this IC will be good for us. Maybe ADL5387 will help.

On Jun 24, 3:15*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?

Have you looked at boards with TI's ADS5474 ADC? It has a max sample
rate of 400 MHz and a 1.4 GHz input bandwidth. Maybe it doesn't meet
your SNR requirements at 720 MHz IF, but it's worth a look.

Darol Klawetter