Aeroflex 2050T SERIES, Operating Manual, Page: 280 / 322

OPTION 006 Avionics
Annex-A-19
ILS (Instrument Landing System) mode
SDM Set Sum of Depth of Modulation (short form)
:DEPTH Set SDM Depth
:INC Set SDM step size
Data type : Decimal Numeric Program Data
Allowed suffices :
PCT
Default suffix :
PCT
:UP Go UP one step
:DN Go DOWN one step
:RETN Return to original setting
:XFER Transfer current value to be the new setting
Data type :
None
Allowed suffices : None
Default suffix :
None
Example:
SDM:DEPTH 40PCT;INC 2;UP;UP;UP
:PHASE Specify the phase relationship between the 90 Hz and 150 Hz
tones.
Data type : Character Program Data (any one of SIN_SIN, COS_COS or
SIN_COS).
Allowed suffices : None
Default suffix : None
SDM Set Sum of Depth of Modulation (short form)
Example:
SDM:PHASE SIN_COS
SDM? Prepares messages containing information on SDM in the following
format:
:SDM:DEPTH <nr2>;INC <nr2>
Example:
:SDM:DEPTH 40.0;INC 0.5
SDM:PHASE? Prepares messages containing information on the phase relationship
between the 90 Hz and 150 Hz tones in the format:
:SDM:PHASE <char>
Example:
:SDM:PHASE SIN_COS
DDM90 Set Difference in Depth of Modulation with 90 Hz tone predominant
(short form)
:DEPTH Set DDM90 Depth
DDM150 Set Difference in Depth of Modulation with 150 Hz tone predominant
(short form)
:DEPTH Set DDM150 Depth
SDM Set Sum of Depth of Modulation (short form)
:DEPTH Set SDM Depth
Data type :
Decimal Numeric Program Data
Allowed suffices :
PCT
Default suffix : None
Note:
When there is no suffix it is assumed that the entry is in DDM
index (%/100).
:UP Go UP one step
:DN Go DOWN one step
:RETN Return to original setting
SDM (continued)
:XFER Transfer current value to be the new setting