[hpsdr] VHF/UHF Upconverters / Downconverters

[Robert W McGwier]

Alex:

The boards formerly known as Flex400, Flex900, Flex2400 which plug into 
the USRP use IQ mixers.  With care in the design,  the image is more 
than sufficiently far down for use in amateur radio applications.  I 
helped Matt test and get the settings right on some parts when  I 
visited Eric Blossom and Matt in "GnuRadio Haven".   These boards are 
most capable.  I will be making a 435 Mhz up and 2401 MHz down 
transponder out of two of them an a USRP for demo purposes!

Bob



Alex wrote:
> ***** High Performance Software Defined Radio Discussion List *****
>
> My interest is in the VHF/UHF arena. I've been contemplating Analog's parts (plus USRP is using them):
>
> 33cm - 23cm - 13cm Downconverter - http://www.analog.com/en/prod/0%2C2877%2CAD8347%2C00.html
> 33cm - 23cm - 13cm Upconverter - http://www.analog.com/en/prod/0%2C2877%2CAD8349%2C00.html
> 2m - 1.25m - 70cm Downconverter - http://www.analog.com/en/prod/0%2C2877%2CAD8348%2C00.html
> 2m - 1.25m - 70cm Upconverter - http://www.analog.com/en/prod/0%2C2877%2CAD8345%2C00.html
>
> I envision a separate frequency agile receiver and transmitter boards controlled by OZY, with the IF fed into/from either JANUS or MERCURY. 
>
> I realize that given the right part selection the 2m and 1.25m work could be done directly without conversion.
>
> Any thoughts and comments?
>
> Alex, N3NP
>
>
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>   


-- 
Robert W. McGwier, Ph.D.
Center for Communications Research
805 Bunn Drive
Princeton, NJ 08540
(609)-924-4600
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