PDS_VERSION_ID         = PDS3                                                 
RECORD_TYPE            = STREAM                                               
OBJECT                 = TEXT                                                 
  PUBLICATION_DATE     = 2012-06-29                                           
  NOTE                 = "                                                    
      TRIG_48.TXT describes the RPWS instrument configuration for the         
      Medium Frequency Receiver (MFR), the Waveform Receiver (WFR), the       
      Wideband Reciever (WBR), the Sounder, and the Dust detector             
      algorithm when using Trigger 48."                                       
END_OBJECT           = TEXT                                                   
END                                                                           

Trigger 48 Description                                                        
                                                                              
Sequence:  C34, C35                                                           
Trigger 48 ( 80 KHz WBR cyclic turn-on, without compression)                  
                                                                              
This trigger is designed to overlay 80-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 80-KHz band selection is done by the     
trigger.  In addition to selecting the 80-KHz band, this trigger turns off    
compression of the WBR data, and forces the snapshot length to 2048 samples.  
These things are necessary to prevent the low-frequency WFR and the LFDR      
data acquisition from blocking WBR data acquisition.                          
                                                                              
Receiver  Frequency Range  Sensor  Snapshot Spacing  Sample Size              
--------  ---------------  ------  ----------------  -----------              
WBR       0 - 80 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).