The problem:

• The sband transmit and receive cycles always start on a one second tick
• txstart - when user requests
• rxStart: next tick after txStart  + rtt.
  
• The sband software sets the starting phase of the pncode generator so that
•  the phase of the code at the first  one second tick after the roundtrip time is 0 (or whatever the user wants).
• It also computes the fractional baud at the receive tick.
• This computation is needed for mono and bi static observations.
• this same code module checks that the echo has  not passed before the receive cycle starts:
• rxOff= txOff + rttTxOn + seconds for noise
• if rxOn > rxOff then generate the error:
•  S_RDRDOP_RXONREQ_AFTER_ECHO_GONE
• This is only needed for mono static runs... but the code module does not know if the run is bi static or mono static, so it always does the checking.
• A work around is to set the parameter rxSecForNoise to say 5 or 10 seconds. This will bypass the error.
• Other variables that might be problem are:
• txDownEarlySEc : bring the tx down this many seconds early. If this is less than the rtt, there might be a problem.
  

 
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