[PCR-1000] Sat reception and adjacent chan filtering

[rtv]

brian,
yes, i tried the packet output and i worked well, i had/have a bit of 
difficulty in getting the audio levels just right but after i adjust it 
each time it looks pretty good. i'm still messing with the antennas 
trying to get them right, but without an antenna analyzer its hard to 
know what your doing (i guess i'll have to break down and buy one if i 
want to really nail this thing)  the noise thing continues to be an 
issue, i'm thinking about building a hiQ bandpass filter (if i can) for 
137 to see if that helps.
                                 
                                                                        
                                     rtv

Brian Winter wrote:

>rtv wrote
>  
>
>>thanks for the links brian!!
>>    
>>
>
>
>No probs - I reckon David Taylors site is especially interesting - and not
>just APT either.
>
>I'd be interested to find out if/how you eventually solve your interference
>prob.
>
>To be honest with you I kinda gave up with APT when I discovered that you
>can download HRTP data from NOAA free of charge.  Brilliant pictures etc -
>MUCH better resolution than APT - and takes the guesswork out of the sat
>comms (of course it also takes you away from your PCR1000 hobby so perhaps
>thats not so smart). It does give you lots of scope to play with decoding
>progs in the knowledge that the underlying data is worth decoding though !
>
>The downside is that files are 10+Mb and I've recently moved house to a
>place where broadband will never reach.  At 28k over landline its painful.
>I'm currently putting all my effort into extending broadband out here by
>wireless, to make downloads like this possible.  Thats fun too !!
>
>btw:  Have you had the audio/packet discussion yet ?  For weather sat work
>on NFM always use packet o/p (you've probably found that out already).  I
>modified a PCR100 to get a discriminator tap just for that reason and the
>difference was incredible.  The audio stages really screw the modulated
>audio.  I guess in terms of numbers it might be the equiv of 10db aerial
>gain (almost certainly more than you would gain from recovering feeder loss
>and for much less effort !).  Another way to look at it is the increase in
>range that you would get.  However, if you're battling against adjacent
>channel interference this probably won't make any difference, but its worth
>a try.
>
>Good luck
>Brian
>
>
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