rf design
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Posted by on April 9, 2005, 7:11 pm
Please log in for more thread options I am tasked with evaluating the feasablility of having an upconverter designed. The requirements are not clear yet, but the design will probably need to convert a 10-100 mhz sinewave to some L band frequency. The output will need to be gated on with an externally supplied signal that has programmable output amplitude, and will support most 'positive-logic' families. The gate signal will be 50ns to 1mS. The IF input will be CW and linear-sweep type waveforms. We are open to suggestions concerning off-the-shelf type solutions, as well as custom design. Also, we have been bitten in the past by 'out-of-house' designs that just don't seem to work as advertised. Any suggestions? Is there such a thing as a contract based upon a working prototype? Am I dreaming, or is there a way to guarantee a contractor or consultant delivers as promised? | ||||||||||||||||||||||||||||||||||||||||||||||
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Posted by on April 9, 2005, 8:44 pm
Please log in for more thread options snbaer@msn.com wrote: I used to be a project manager/senior engineer at a VERY LARGE defense comtractor. I have also consulted at several LARGE defense companies. All you have to do is place milestones at appropriate places. This protects you and the supplier. If the milestone is met, payment is processed. If the contract is yanked, they (the supplier) get paid for their effort. Make sure that the project is well defined. This will reduce the number of UH OHs that usually appear just before a big demo. My projects came in on time and sometimes under budget. I learned to fight my battles with upper management before the project started. I had very little stress as we got closer to completion. Dave | ||||||||||||||||||||||||||||||||||||||||||||||
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Posted by RST Engineering \(jw\) on April 10, 2005, 1:42 am
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Well, sir, I'd suggest that your past "bittens" are possibly of your own making 10 to 100 millihertz (mhz) are rather low frequencies. Perhaps you meant MEGAhertz, but that is not what the "specification" said. LIkewise the gate signal between 50 nanoseconds to 1 milliSiemens. That doesn't make a lot of sense. And "some" L-band frequency is pretty vague...like from 1 to 3 Gigs. Perhaps the bitten might be avoided by writing the specification so that a competent consultant can bid on it properly. Jim > I am tasked with evaluating the feasablility of having an
> upconverter designed. The requirements are not clear yet, but the > design will probably need to convert a 10-100 mhz sinewave to some L > band frequency. The output will need to be gated on with an externally > supplied signal that has programmable output amplitude, and will > support most 'positive-logic' families. The gate signal will be 50ns to > 1mS. The IF input will be CW and linear-sweep type waveforms. > We are open to suggestions concerning off-the-shelf type > solutions, as well as custom design. > Also, we have been bitten in the past by 'out-of-house' designs > that just don't seem to work as advertised. Any suggestions? Is there > such a thing as a contract based upon a working prototype? Am I > dreaming, or is there a way to guarantee a contractor or consultant > delivers as promised? > | ||||||||||||||||||||||||||||||||||||||||||||||
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Posted by rex on April 10, 2005, 2:19 am
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On 9 Apr 2005 16:11:49 -0700, snbaer@msn.com wrote: >will probably need to convert a 10-100 mhz sinewave to some L
>band frequency Sorry, I could go look it up, but what is L band in MHz or GHz? | ||||||||||||||||||||||||||||||||||||||||||||||
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Posted by Joerg on April 10, 2005, 3:22 am
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Hello Rex, > Sorry, I could go look it up, but what is L band in MHz or GHz?
Roughly 800-1500MHz, for most apps. Regards, Joerg http://www.analogconsultants.com | ||||||||||||||||||||||||||||||||||||||||||||||
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> that just don't seem to work as advertised. Any suggestions? Is there
> such a thing as a contract based upon a working prototype? Am I
> dreaming, or is there a way to guarantee a contractor or consultant
> delivers as promised?