PDS_VERSION_ID         = PDS3                                                 
RECORD_TYPE            = STREAM                                               
OBJECT                 = TEXT                                                 
  PUBLICATION_DATE     = 2005-06-01                                           
  NOTE                 = "                                                    
      C38_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: C29, C30, C31                                                       
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       Sensors       Time between Snapshots      
--------      ----------------        -------         ----------------------  
  LFR          1 - 25 Hz       EX, BX    32 seconds                           
  MFR         25 - 12 KHz       EX, BZ    32 seconds                          
  HFR       3.6 KHz - 16 MHz       EX, EW    32 seconds                       
  LP               N/A                  LP              8128 seconds          
                                                                              
This mode is defined by:                                                      
                                                                              
          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              3.6-319 kHz          
H1   2E   y        y      1     n  160    1   18    100  325k-2.0MHz          
H2   2E   y        y      1     n  80     1   71    200  2.0M-16MHz           
                                                                              
Bands ABC require 3.16 sec to complete, H1 requires 3.16 sec, and H2 requires 
6.00 sec for a total of 12.32 sec per sweep. 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.