PDS_VERSION_ID         = PDS3                                                 
RECORD_TYPE            = STREAM                                               
OBJECT                 = TEXT                                                 
  PUBLICATION_DATE     = 2005-05-31                                           
  NOTE                 = "                                                    
      C31_TRIG_3C.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 3C."        
END_OBJECT           = TEXT                                                   
END                                                                           
                                                                              
                                                                              
Trigger 3C Description                                                        
Sequence: All                                                                 
                                                                              
Trigger 3C mode                                                               
                                                                              
The instrument is assumed to be operating in trigger 28.                      
                                                                              
Command Byte Count: 6 Valid Command Count: 119                                
                                                                              
A MEM_TWEAK is included in this trigger to set the WBR/DUST antenna           
multiplexor to the Lp position following WBR or DUST data acquisitions.       
                                                                              
Note that the data                                                            
set acquisition time for this mode is extremely long. This long timing will   
usually result in an odd HFR record during the transition to another mode in  
the group (i.e. when not using trigger 10). In particular, it is suggested    
that any of the HF-WBR modes not follow this trigger directly as the WBR and  
HFR acquisition timing will be shifted for a period of time as the HFR.       
                                                                              
This mode was modified for C21. The H1 band now includes all frequencies from 
125 KHz through 4025 KHz; the frequency step size was changed from 50 to 25   
KHz. To keep the overall timing about the same, the integration constant was  
changed from 160 to 80 ms.                                                    
                                                                              
Receiver  Frequency Range       Sensor          Cycle Time     Snapshot Size  
--------  ---------------  ----------------  ----------------  -------------  
LFR       1Hz-25Hz         EX,BX               32.000 Seconds                 
MFR       25Hz-12KHz       EX,BZ               32.000 Seconds                 
HFR       3.6KHz-16MHz     EX,EW               42.125 Seconds                 
WFR       50Hz-2.5KHz      EX,EW,BX,BY,BZ      96.000 Seconds      2048       
WBR       100Hz-10KHz      EX                   0.000 Seconds      2048       
                                                                              
          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        8    n    160  1     79    50 0.125-4.075MHz       
HF2   2E    y     y        8    n     80  1    243    50 4.025-16.175MHz      
                                                                              
Bands ABC require 3.120 sec to complete, H1 requires 13.883 sec, and          
H2 requires 21.750 sec for a total of 38.752 sec per sweep.  The hfr          
cycle time is 42.125 seconds.