PDS_VERSION_ID         = PDS3                                                 
RECORD_TYPE            = STREAM                                               
OBJECT                 = TEXT                                                 
  PUBLICATION_DATE     = 2005-06-01                                           
  NOTE                 = "                                                    
      C39_TRIG_8A.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 8A."        
END_OBJECT           = TEXT                                                   
END                                                                           
                                                                              
                                                                              
Trigger 8A Description                                                        
                                                                              
Sequence: C37, ...                                                            
                                                                              
Trigger 8A ( Survey Mode, All Regions )                                       
                                                                              
This mode is designed to provide a survey mode, with standard temporal        
resolution and spectral resolution.  Both low-frequency and high-frequency    
WFR measurements are made, using "toggle" mode. Dust detection is included.   
Langmuir Probe sweeps are performed every 640 seconds. A Sounder measurement  
is scheduled every 10 minutes.  MFDR measurements are made every 32 seconds,  
which provides MFR2 replacement data, while the LFR measurements are also     
made every 32 seconds, providing the 25-Hz LFR data.                          
                                                                              
Receiver  Frequency Range   Sensors         Time between Snapshots            
--------  ----------------  --------------  ----------------------            
LFR       1 - 25 Hz         EX, BX          32 seconds                        
MFDR      70 - 1700 Hz      EX, BX          32 seconds                        
MFR       25 - 12 KHz       EX, BZ          32 seconds                        
WFR       1 - 25 Hz         EX,EW,BX,BY,BZ  320 seconds                       
WFR       .1 - 2.5 KHz      EX,EW,BX,BY,BZ  320 seconds                       
HFR       3.6 KHz - 16 MHz  EX, EW          16 seconds                        
LP        N/A               Langmuir Probe  640 seconds                       
Sounder   3.6 - 115 KHz     EX, EW          600 seconds                       
                                                                              
The HFR is in a modified "Composite Survey" mode, which now includes          
both auto- and cross-correlations for H1.                                     
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      2     n  80     1   60    25   325k-1.8MHz          
H2   1E   n        n      1     n  20     1   72    200  1.8M-16MHz           
                                                                              
Bands ABC require 3.16 sec to complete, H1 requires 5.47 sec, and H2 requires 
1.46 sec for a total of  10.09 sec per sweep. However, the time between       
analyses is set to 16 seconds to reduce the bit rate.  Every 600 seconds the  
HFR normal analyses are interrupted by a Sounder analysis.  The Sounder       
operation has a duration of approximately 40 seconds.  This Sounder analysis  
is defined by:                                                                
                                                                              
  sounder mode:   EZ AAA                                                      
  1st  sounder freq:      0                                                   
  last sounder freq:     89                                                   
  T1 delay:        10 msec                                                    
  T2 delay:        25 msec                                                    
  T3 delay:        25 msec                                                    
  passive spectra:      2                                                     
  active  spectra:      2                                                     
  # of cycles:       1                                                        
  sounder output A:      3 autos                                              
  sounder output B:      3  AGCs