PDS_VERSION_ID         = PDS3                                                 
RECORD_TYPE            = STREAM                                               
OBJECT                 = TEXT                                                 
  PUBLICATION_DATE     = 2005-11-29                                           
  NOTE                 = "                                                    
      S15_TRIG_42.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 42."        
END_OBJECT           = TEXT                                                   
END                                                                           
                                                                              
                                                                              
Trigger 42 Description                                                        
                                                                              
Sequence: C34, C35                                                            
                                                                              
Trigger 42 ( 10 KHz WBR cyclic turn-on)                                       
                                                                              
This trigger is designed to overlay 10-KHz Wideband Receiver data on top of a 
standard background trigger, such as 8A (Survey), 8E (night-time survey), or  
A0 (SEDDF). Data acquisition continues for all receivers, with the exception  
of the dust detector and the sounder, which are disabled during this          
trigger's operation. In addition, the MFR is switched to the EZ antenna to    
avoid interfering with the WBR, which is assumed to be connected to the EX    
antenna.  It is assumed that the WBR is pre-configured before this trigger is 
executed, except that the 10-KHz band selection is done by the trigger. The   
standard setup done for the WBR by the background triggers is detailed        
below.                                                                        
                                                                              
Receiver Frequency Range Sensor Time between Snapshots Samples per Snapshot   
-------- --------------- ------ ---------------------- --------------------   
WBR      0 - 10 KHz      EX     0.125 second           2048                   
MFR      25 - 12 KHz     EZ, BZ 32 seconds                                    
                                                                              
Other notes:                                                                  
                                                                              
This trigger produces a maximum data rate of about 131 kbps. If the           
Telemetry Mode is S&ER-3, the data is limited to 60,928 bps.                  
                                                                              
There is a 60-second delay following the execution of this trigger, and       
preceding the start of the WBR data acquisition. This allows time for the     
MFR to switch antennas and the sounder to finish any pending operation.       
                                                                              
This trigger will work with most non-direction-finding triggers, such         
as Trigger 28 (Interplanetary Cruise).