Re: LF: Multi-function beacon

[Andy Talbot <andy.g4jnt@googlemail.com>]

Hi Graham -

I'm not bothered about log files myself as  I don't have the time to collate massses of data but if someone else feels they'd like to do it...

 

Haven't hought about how long it will go for, I may just forget about it shoved up in the corner of the garage where, if it catches fire, all damage will be contained,  so happy enough running 24/7 for now.  The 5MHz monitoring system is in there as well.

 

As for your questions on the pulsed part of the wavefom;  its not in use on this transmission , I replaced it with a PSK31 message instead.   The original 5MHz system used a pulse width of 500us at a PRF of 40Hz, with the idea of using an SSB reception bandwidth, so something coul dbe done with SSB Tx, but these days we'd probably go another direction with PSK and a PN sequence rather than a simple short pulse.

Andy  G4JNT
www.g4jnt.com

2009/3/6 Graham <g8fzk@g8fzk.fsnet.co.uk>

Ok Andy,

 

Obvious question, hi,

 

How long are you  thinking of running the  beacon and where do  you  want the report files to  be sent ?

 

There may be quite a few records generated in a short time, I note from the last 'hfc' that there is quite a backlog of data from the  5  meg operation but there is movement

to analyse the  data. should prove interesting ..  

 

How aggressive is the pulsed section of the  tx cycle,?, I know there is some interest in using that facility for study's on 500, but as yet I have not  found the rise/fall and timing parameters. dose it need to  be a pulse or  could a small frequency shift be used if time is being measured ?

 

Tnx- G ..