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?
720 Mhz IF Processing
Started by ●June 24, 2009
Reply by ●June 24, 20092009-06-24
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
Reply by ●June 25, 20092009-06-25
On 24 Haziran, 23:52, spop...@speedymail.org (Steve Pope) wrote:> recoder =A0<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. =A0You 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. > > SteveThanks, thats what I am looking for. Does anybody know a module that can do the downconversion from 720 Mhz to 70-140 Mhz IF?
Reply by ●June 25, 20092009-06-25
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/productpage.asp?STRFilter=SMT702 - Sebastien
Reply by ●June 25, 20092009-06-25
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/productpage.asp?STRFilter=SMT702 > > - SebastienThank 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.
Reply by ●June 25, 20092009-06-25
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/productpage.asp?STRFilter=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.
Reply by ●June 25, 20092009-06-25
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/productpage.asp?STRFilter=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.
Reply by ●June 25, 20092009-06-25
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
Reply by ●June 25, 20092009-06-25
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/productpage.asp?STRFilter=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
Reply by ●June 25, 20092009-06-25
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/productpage.asp?STRFilter=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
