DT-4500 Series C- and Ku-Band Down Converters
MN/DT4500.IOM
Serial Interface Operation
Revision 2
8–25
8.7.4.2
ICT (Initialize Chain Command)
Use ICT to initialize each converter's chain position, including the backup
converter. This command is allowed only when you are active in Redundancy
Mode.
Description
Details
Initialize Chain Description:
<DEV/ICT_xx_yy{cr}
Confirmation:
>DEV/ICT_xx_yy{cr}{lf}]
Initialize Status:
<DEV/ICT_{cr}
Confirmation:
>DEV/ICT_xx_yy{cr}{lf}] where:
xx = chain position = 01 to 12, or BU. Where BU selects the converter as
the backup.
yy = chain length for xx = BU (i.e. Backup converter) 01 to 12.
yy = unused if xx = 01 to 12 (i.e. chain converter)
EXAMPLE 1: <DEV/ICT_01{cr}
>DEV/ICT_01{cr}{lf}]
(Description assigns the converter chain position "1")
EXAMPLE 2: <DEV/ICT_BU_08{cr}
>DEV/ICT_BU_08{cr}{lf}]
(Description assigns the receiving converter as the backup converter in
a 1:8 system.)
IMPORTANT! It should be reiterated that only the converter physically
located at the top of a redundant rack should be assigned as the
Backup unit (BU).
Likewise, assignment of chain positions in a redundant rack should be
made according to the physical allocation of each converter in the rack
(i.e., the top converter should be the Backup Unit; the second
converter should be assigned chain position 1, the third converter
position 2, etc.).
8.7.4.3
SAM (Switching Automatic/Manual Mode)
Use SAM to set the switching mode for the backup converter if both units are in
Redundancy Mode. This command is only accepted by the backup converter. If a
chain converter is set in Manual Mode, the backup converter will log the
occurrence and not act upon further information from the converter until put
into Automatic Mode. The default is off.
