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Comtech EF Data SLM-5650A User Manual

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SLM-5650A Satellite Modem

Revision 8

Appendix C

MN-SLM5650A

C–17

Parameter

Type

Command

(Instruction

Code and

Qualifier)

Arguments for

Command or

Response to

Query

Description of Arguments

Response to

Command

Query

(Instruction

Code and

Qualifier)

Response to Query

Rx Clock Invert RCI=

1 byte, value of 0

or 1

Command or Query.
Invert Receive Clock in the form x, where:

0=Normal

1=Inverted
Example: RCI=1 (selects Inverted RX Clock)

RCI =

RCI?

RCI*

RCI#

RCI?

RCI=x

(see Description

of Arguments)

Rx Clock

Source

RCK=

1 byte, value of 0

thru 3

Command or Query.
Rx Clock Source, where:

0=Rx Satellite

1=Internal

2=Tx-Terrestrial

3= External Clock (only valid with the G.703 Option Card)
Note: Commands as well as queries are not allowed when either the GigaBit

Ethernet or NP card has been selected as the current interface type.
Example: RCK=2 (selects Tx-Terrestrial)

RCK=

RCK?

RCK*

RCK#

RCK?

RCK=x

(see Description

of Arguments)

Rx

Reed-Solomon

Code Word

RCW=

1 byte, value of 0

to 5

Command or Query.
Rx RS encoding in the form x, where:

0 = RS(225,205,10)

1 = RS(219,201,9)

2 = RS(208,192,8)

3 = RS(194,178,8)

4 = RS(126,112,7)

5 = RS(220,200,10)

Depending on Modem mode, overhead type, and data rate, not all selections will be

valid.
Example: RCW=0 (This is a ‘don’t care’ if RS is Off under TRS)

RCW =

RCW?

RCW *

RCW #

RCW?

RCW=x

(see Description

of Arguments)

Rx Differential

Decoding

RDD=

1 byte, value of 0

or 1

Command or Query.
Rx Differential Decoding in the form x, where:

0=Off

1=On
Depending on FEC type or Modulation Type, not all selections will be valid.
Example: RDD=1 (selects Rx Differential Decoding On)

RDD=

RDD?

RDD*

RDD#

RDD?

RDD=x

(see Description

of Arguments)

Rx Data Fault

RDF=

1 byte, value of 0

thru 2

Command or Query.
Receive Data Fault, where:

0=None

1=DATA

2=AIS
Example: RDF=0 (selects Data Fault = None)

RDF =

RDF?

RDF*

RDF#

RDF?

RDF=x

(see Description

of Arguments)