Appendix B—Serial Communication Technical Details Tau User’s Manual
B-10 June 2011 TAU-0035-00-10, version 150
0x79 SHUTTER_POSITION
Opens or closes the shutter
Get Cmd: 0 None
Set Cmd: 2
&
Resp: 2
Shutter position
0x0000 = open
0x0001 = close
0x2C DDE_GAIN
Sets the gain of the DDE filter (input only in manual mode. In
automatic mode this is set internally)
Get Cmd: 0 None
Set Cmd: 2
&
Resp: 2
Gain value (0x0000 to 0x00FF)
0xE2 DDE_THRESHOLD
Sets the threshold of the DDE filter (input only in manual mode. In
automatic mode this is set internally)
Get Cmd: 0 None
Set Cmd: 2
&
Resp: 2
Threshold value
(0x0000 to 0x00FF)
0xE3 SPATIAL_THRESHOLD
Gets or sets the spatial threshold of the DDE filter and the DDE
mode (auto or manual)
Get Cmd: 0 None
Set Cmd: 2
&
Resp: 2
Byte 0 = Threshold
(0x0000 to 0x000F)
Byte 1 = Mode
0x0000 = manual
0x0001 = auto
0xDB GAIN_SWITCH_PARAMS
Gets or sets the population (as a percentage) and temperature
(in deg C) thresholds for high/low gain switching
Get Cmd: 0 None
Set Cmd: 8
&
Resp: 8
Bytes 0-1: hiToLoThreshold
Bytes 2-3: hiToLoPopulation
Bytes 4-5: loToHiThreshold
Bytes 6-7: loToHiPopulation
Table B-4: RS232 Function Codes
Function
Code (hex)
Command Description Byte Count
Argument
(i.e, Data Bytes) (hex)
Notes