Chapter 4 _________________________________________________________________ Operation 
 
VAISALA ________________________________________________________________________ 67 
SET MODULE MODEM V21 ORIGINATE 
yes/no (DMX501 only) 
300 bps modem mode, ORIGINATE mode. Verification 
yes/no asked only if the command is given through 
SET MODULE MODEM V21 ANSWER_NC 
yes/no (DMX501 only) 
300 bps modem mode, ANSWER mode and no carrier 
on standby. The carrier is on only during message 
sending. Verification yes/no asked only if the command 
is given through DATA PORT. 
SET MODULE MODEM V22 ANSWER 
yes/no (DMX501 only) 
1200 bps modem mode, ANSWER mode. Verification 
yes/no asked only if the command is given through 
SET MODULE MODEM V22 ORIGINATE 
yes/no (DMX501 only) 
1200 bps modem mode, ORIGINATE mode. Verification 
yes/no asked only if the command is given through 
SET MODULE MODEM V22BIS ANSWER 
yes/no (DMX501 only) 
2400 bps modem mode, ANSWER mode. Verification 
yes/no asked only if the command is given through 
ORIGINATE yes/no (DMX501 only) 
2400 bps modem mode, ORIGINATE mode. Verification 
yes/no asked only if the command is given through 
SET MAINTENANCE_PORT BAUD number 
Sets the Maintenance port serial line baud rate to 
300...9600. Communication parameters: 8N1 (fixed). 
Sets the command mode timeout to 0 ... 30, in minutes. 
Zero disables the timeout, and the default is 10 min. 
SET TERMINAL_LINES number 
Adjusts printouts used for terminal screen. Minimum 5 
lines (default 24). 
Resets the measurement sequence. The following data 
message is measured starting from the moment all 
average values are erased. Next message is 
transmitted in (interval +2) seconds. 
Lists system information: type, ID, software version, 
hardware modules, serial numbers. 
Displays the device type, device name given by the 
user, and ID. 
Lists the software version. 
 
Table 10  FS11 Advanced Level Commands 
CALIBRATE WINDOW_CLEAN 
VISIBILITY_SENSOR 
Sets the clean references for contamination control (and 
backscatter control) in FS11. 
CALIBRATE WINDOW_CLEAN 
BL_SENSOR 
Sets the clean references for contamination control (and 
backscatter control) in Background Luminance Sensor. 
CALIBRATE VISIBILITY calibration_value 
Sets the visibility calibration value, which should be 
between 0 and 10. 
CALIBRATE VISIBILITY OFFSET 
Sets the offset value for the visibility sensor. Before this 
command is given, the optical blockers must be put to 
transmitter and receiver of the visibility sensor. The 
optical blockers are part of the FSA11 calibration kit. 
Invokes a Guided Calibration Procedure for the visibility 
sensor. This procedure includes clean reference setting 
for the visibility sensor, the offset determination for the 
visibility sensor and the visibility calibration.