Rohde & Schwarz SME02 - Page 286

SOURce:ILS SME
1038.6002.02 3.70 E-13
[:SOURce]:ILS[:GS|GSLope]:COMid[:STATe] ON | OFF
The command activates or deactivates the ComId signal. *RST value is OFF
Example: :SOUR:ILS:GS:COM:STAT ON
[:SOURce]:ILS[:GS|GSLope]:COMid:FREQuency 0.1 to 20 000 Hz
The command sets the frequency of the ComId signal. *RST value is 1020 Hz
Example: :SOUR:ILS:GS:COM:FREQ 1020
[:SOURce]:ILS[:GS|GSLope]:COMid:DEPTh 0 to 100 PCT
The command sets the AM modulation depth of the ComId signal.
Example: :SOUR:ILS:GS:COM:DEPT 10 PCT *RST value is 10 PCT
[:SOURce]:ILS[:GS|GSLope]:DDM
(Difference in D
epth of Modulation) The commands to set the modulation depth difference
between the signal of the upper lobe (90 Hz) and the lower lobe (150 Hz) are under this node. )
[:SOURce]:ILS[:GS|GSLope]:DDM:CURRent - 685 uA to + 685 uA
The command enters the DDM value alternatively as a current by means of the ILS indicating
instrument. This parameter is coupled with SOURce:ILS:GS:DDM:DEPTh and :LOGarithmic.
Example: :SOUR:ILS:GS:DDM:CURR 0 *RST value is 0 A
[:SOURce]:ILS[:GS|GSLope]:DDM[:DEPTh] - 0.8 to + 0.8
The command sets the difference of the modulation depth. This parameter is coupled with
SOURce:ILS:GS:DDM:CURRent.
The following is true for SOURce:ILS:GS:DDM:DIRection DOWN
ILS:GS:DDM:DEPTh = (AM(90Hz) - AM(150Hz))/100%
and for SOURce:ILS:GS:DDM:DIRection UP
ILS:GS:DDM:DEPTh = (AM(150Hz) - AM(90Hz))/100%
Example: :SOUR:ILS:GS:DDM:DEPT 0 *RST value is 0
[:SOURce]:ILS[:GS|GSLope]:DDM:DIRection UP | DOWN
The command indicates the direction in which the pilot has to correct the course. By calculation,
this setting has the same effect as a reverse of the sign of the
SOURce:ILS:GS:DDM:DEPTh-value.
UP The airplane is too low, it must climb.
DOWN The airplane is too high, it must descend.
Example: :SOUR:ILS:GS:DDM:DIR DOWN *RST value is UP
[:SOURce]:ILS[:GS|GSLope]:DDM:LOGarithmic - 999.9 dB to + 999.9 dB
The command enters the DDM value in dB. This parameter is coupled with SOURce:ILS:GS
:DDM:DEPTh and :CURRent. *RST value is 0.0 dB
Example: :SOUR:ILS:GS:DDM:LOG 0