Comtech EF Data SLM-5650B - Page 98

SLM-5650B Satellite Modem
Revision 2
Front Panel Operation 5–14 MN-SLM-5650B
CONFIG: Tx  Clocking
Tx Clocking: CLK Source: SCT (E)
SCT Ref: Reference
Use the  arrow keys to select Clk Source or SCT Ref, and then press [ENT]. Then:
Option
Setting
Clk
Source
Use the  arrow keys to select
SCT
or
Tx-Terr
. Press
[ENT]
when done. Note the
following:
• SCT (Send Clock Timing) – Selects the internally generated SCT clock as the Tx data
clock source.
• Tx-Terr – Selects the incoming interface clock as the Tx data clock source.
SCT
Ref
Use the

arrow keys to select Reference, DataSrcSync, or LoopTiming. Press [ENT]
when done. Note the following:
• Reference – SCT will be generated from the modem’s 10 MHz reference.
• DataSRCSync (Data Source Synchronization) – The clock is generated using transitions
on the incoming data interface. Not more than 50 consecutive “O”s are allowed in the
data stream.
• LoopTiming – The clock generated from the received carrier is used as a reference for
generating SCT.
CONFIG: Tx  Misc
Tx Misc: Clk/DataPhase BitOrdering
(E)
Use the  arrow keys to select Clk/DataPhase or BitOrdering, and then press [ENT].
CONFIG: Tx  Misc  Clk/DataPhase
Tx Clock Phase: Normal
Data Phase: Normal (E)
Use the  arrow keys to select Tx Clock Phase or Data Phase, and then press
[ENT].
Use the  arrow keys to select Normal or Invert. Press [ENT] when done.
CONFIG: Tx  Misc  Bit Ordering
BPSK Bit Ordering: Standard
Non-Standard (E)
Use the arrow keys to select BPSK Bit Ordering (for BSPK compatibility) as
Standard or Non-Standard, and then press [ENT].