[amsat-bb] Re: P3E Microwave Frequencies
oh2aue at sral.fi
Sun May 11 12:23:02 PDT 2008
>Hello The Net:
>Was just at the WWW.KEPS.IT website and saw a proposed frequency
>plan for P3E.
>I am starting to plan for Microwave receive only down converters
>and transmit only up converters.
>How firm is the frequency for the X band downlink at 10,490 MHz ?
>Ditto for the L2 uplink of 1,263 MHz and S band uplink at 2,447 MHz ?
>I am starting to look at possibilities of a common Local Oscillator
>(LO) for some of the bands, but I am having no luck. Having a commonLO
> or at least parts of a LO multiplier chain, would economize and maybe
>lend themselves to being PLLed to the station 10 MHz reference.
>Has anyone come up with common LO and IF schemes for multiple P3E
>My IC-910H will cover 1,263 MHz nicely, but it looks like all of the
>other higher bands will have a unique LO for the band, at least for
>X band and below.
>Time to get ready....
>Stan, W1LE FN41sr Cape Cod
There is some contradicting information around regarding the
S band receiver and X band transmitter, but here are the frequencies
the engineering and flight models are being synthesized and
crystalled for as per our efforts to get at least the X band
downlink to a more "standard" frequency:
Center Frequencies for the IF center frequency of 10.700 MHz:
U/D Mode Center Frequency Bandwidth
Uplink Coherent 2438.567 MHz ~2 MHz
Uplink Linear 2439.000 MHz 38 kHz
Downlink Coherent 10451.000 MHz ~2 MHz
Downlink Linear 10451.000 MHz ~2 MHz
Beacon BPSK 10451.030 MHz NB, Modulation dependent
These frequencies were last published in the AMSAT-DL Journal
Nr.4 Jg.33, any other public sources may be unreliable.
73's Michael, OH2AUE
"Life is too short for Sudoku"
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