PDS_VERSION_ID         = PDS3                                                 
RECORD_TYPE            = STREAM                                               
OBJECT                 = TEXT                                                 
  PUBLICATION_DATE     = 2009-03-24                                           
  NOTE                 = "                                                    
      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 Langmiur Probe (LP), the Sounder, and the Dust detector      
      algorithm when using Trigger 8A."                                       
END_OBJECT           = TEXT                                                   
END                                                                           

Trigger 8A Description                                                        
                                                                              
Sequence:  S05, ...                                                           
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.                 
                                                                              
Beginning in S03, the HFR H2 configuration was modified, in order to improve  
the sensitivity for SEDs.  The H2 integration period is increased to 40 ms,   
and the number of frequency steps is increased to 143, with the delta-f       
between steps decreased to 100 kHz.                                           
                                                                              
Receiver  Frequency Range   Sensors         Snapshot Spacing                  
--------  ----------------  --------------  ----------------                  
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 the newest version of "Composite Survey" mode, which now        
includes both auto- and cross-correlations for H1, and changed parameters     
for H2.  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       32    n   1000  1              3.6-319KHz           
HF1   2E    y     y        2    n     80  1     60    25 0.325-1.825MHz       
HF2   1E    n     n        1    n     40  1    143   100 1.825-16.125MHz      
                                                                              
Bands ABC require 3.160 sec to complete, H1 requires 5.473 sec, and H2        
requires 5.034 sec for a total of 13.666 sec per sweep.  The hfr cycle time   
is 16.000 seconds.  Every 600 seconds the HFR normal analyses are             
interrupted by a Sounder analysis.  Beginning in S05, the Sounder setup was   
modified.  With the current configuration, the Sounder operation has a        
duration of approximately 16 seconds.  This Sounder analysis is defined by:   
                                                                              
                                                                              
  sounder mode:   EX AAA                                                      
  1st  sounder freq:      0                                                   
  last sounder freq:     89                                                   
  T1 delay:         5 msec                                                    
  T2 delay:         5 msec                                                    
  T3 delay:        15 msec                                                    
  passive spectra:      2                                                     
  active  spectra:      2                                                     
  # of cycles:       1                                                        
  sounder output A:      3 autos                                              
  sounder output B:      3  AGCs