[time-nuts] GPS down converter question

Alex Pummer alex at pcscons.com
Mon Nov 30 22:59:26 EST 2015


Meinberg down-converter: IF 34MHz: 
http://digilander.libero.it/maurit0/transito%20ebay/GPS%20R&S%20Meinberg/gpsant.pdf
73
KJ6UHN
Alex

On 11/30/2015 2:02 PM, Magnus Danielson wrote:
> Paul,
>
> Many GPS receivers only use 2,046 MHz bandwidth, but some use the full 
> 20,46 MHz even if they only do C/A. Guessing that you are working on 
> down-conversion for an old box, then 2,046 MHz will be your answer.
>
> Cheers,
> Magnus
>
> On 11/30/2015 06:37 PM, paul swed wrote:
>> I am looking at building a GPS down converter.
>> LO 1500 Mhz locked to a 10 MHz ref.
>> The IF will be at 75.42 Mhz how wide should it be?
>>
>> My question is simple.
>>
>> What should the IF pass band bandwidth be?
>> Not sure if it should be 3-4 Mhz, 10 or 15 wide.
>>
>> Thanks
>> Paul
>> WB8TSL
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