Comtech EF Data SLM-5650B, Installation And Operation Manual

Page: 98 / 412

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] .