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Jecksons Ben
01/19/12 23:31
Read: 315 times
Makassar
Indonesia


 
#185576 - very high
Responding to: Per Westermark's previous message
Per Westermark said:
Few things are truly immune. It's a question of how many frequencies it can jump between - how many frequencies that may be jammed and what amount of noise it can survive for each individual frequency.

Military equipment have huge output power and a large availability of frequencies. So an enemy can't produce enough energy to block all possible frequencies - if 1000 frequencies are possible and the transmitter has 10kW power, it takes huge energy to block most of these 1000 frequencies with a high enough power level that the channel is totally wrecked. Remember also that the jamming transmitter may not be at a good position relative to the receiver.

End-user equipment are not even near as resilient.


Just 13-14 hopping..FHSS.

I never look that UHF transmitter above XXX Watt(means below 1KW).

at Amateur band.UHF power is restricted.

Maybe there's info or link companies(stores) that produce that modules?

Thank you
Jeckson S Ben




List of 19 messages in thread
TopicAuthorDate
RF amplifier for 4XX Mhz      JecksonS Ben      01/17/12 03:47      
   Probably illegal?      Andy Neil      01/17/12 12:46      
      maybe...      JecksonS Ben      01/18/12 06:12      
         Look for a legal solution!      Kai Klaas      01/18/12 11:14      
            It's immune with Jam      JecksonS Ben      01/19/12 01:46      
               Immune?      Per Westermark      01/19/12 02:55      
                  very high      JecksonS Ben      01/19/12 23:31      
                     Don't need kW to jam civilan "toy" equipment      Per Westermark      01/20/12 03:06      
                        You don't need to look at huge transmitters.?      JecksonS Ben      01/21/12 08:25      
                           Are there stores of info how's to implemented that?      Andy Neil      01/21/12 09:29      
                              Instruments        Per Westermark      01/21/12 09:42      
                                 that's why..      JecksonS Ben      01/22/12 07:51      
                                    No - side band disturbances will still be uV and illegal      Per Westermark      01/22/12 11:19      
                                       missing      JecksonS Ben      01/23/12 07:27      
                              true      JecksonS Ben      01/22/12 07:49      
                                 No! No!! No!!!      Andy Neil      01/22/12 10:03      
                                    ??      JecksonS Ben      01/23/12 07:37      
   Teh limit is..      Jez Smith      01/17/12 13:57      
   500mW ...      Rob Klein      01/17/12 15:24      

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