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.