PDS_VERSION_ID         = PDS3                                                 
RECORD_TYPE            = STREAM                                               
OBJECT                 = TEXT                                                 
  PUBLICATION_DATE     = 2005-11-29                                           
  NOTE                 = "                                                    
      S04_TRIG_28.TXT describes the RPWS instrument configuration for         
      the High Frequency Receiver (HFR), the Medium Frequency Receiver (MFR), 
      the Low Frequency Receiver (LFR), the Waveform Receiver (WFR),          
      the Wideband Receiver (WBR), the Langmuir Probe (LP), the Sounder,      
      and the onboard Dust detection algorithm when using Trigger 28."        
END_OBJECT           = TEXT                                                   
END                                                                           
                                                                              
                                                                              
 Trigger 28 Description                                                       
Sequence: S04,...                                                             
                                                                              
Trigger 28 (Interplanetary Cruise & Dust & LP Sweeps but without              
Direction-Finding)                                                            
                                                                              
  This mode is designed to provide a low bit-rate Survey with low temporal    
and spectral resolution for periods during cruise. No Wideband or Waveform    
measurements are made. The entire RPWS frequency range (1 Hz - 16 MHz) is     
covered.                                                                      
                                                                              
  Starting in C29, the 3-axis direction-finding mode was removed from the     
HFR and instead, the sensor was changed to the dipole to increase             
sensitivity in an effort to detect Saturn emissions. The duty cycle of the    
HFR was also increased from once every 64 seconds to every 32 seconds.        
                                                                              
Receiver  Frequency Range       Sensor          Cycle Time                    
--------  ---------------  ----------------  ----------------                 
LFR       1Hz-25Hz         EX,BX               32.000 Seconds                 
MFR       25Hz-12KHz       EX,BZ               32.000 Seconds                 
LPswp     N/A              Langmuir Probe    8128.000 Seconds                 
HFR       3.6KHz-16MHz     EX,EW               32.000 Seconds                 
                                                                              
          Correlations Channels    Integ.           Size Frequency            
Band Ant. Auto- Cross- per Band df Period Rep Steps kHz  Start - Stop         
---- ---- ----- ------ -------- -- ------ --- ----- ---- ------------         
ABC   2E    y     y       16    n   1000  1              3.6-319KHz           
HF1   2E    y     y        1    n    160  1     18   100 0.325-2.125MHz       
HF2   2E    y     y        1    n     80  1     71   200 2.075-16.275MHz      
                                                                              
Bands ABC require 3.160 sec to complete, H1 requires 3.165 sec, and           
H2 requires 6.356 sec for a total of 12.680 sec per sweep.  The hfr           
cycle time is 32.000 seconds.                                                 
                                                                              
  However, to keep the bit rate down the HFR only performs one complete       
sweep every 32 seconds.  Starting in C26, dust detection using the EZ sensor  
was added, and also periodic Langmuir Probe sweeps every 8128 seconds.