User guide

SATELLINE-3AS NMS / NMS Epic / NMS 869 / VHF

User Guide, Version 1.0

When the power of a radio modem is switched off, the configuration settings of a radio modem

always return to values defined initially using the

Programming Mode

, thus resetting any settings

changed using SL commands during power on. It is however possible to save changed settings

permanently by using a special SL command.

In case you need more information on the time delays related to the use of SL commands,

please contact the manufacturer.

13.1.1

Frequency related SL commands

Command Description Response

SL&F=nnn.nnnnn Set both TX and RX frequencies to nnn.nnnnn MHz "OK" or "ERROR"

SL&F? Get TX and RX frequencies "TX nnn.nnnnn MHz,

RX nnn.nnnnn MHz"

or "ERROR"

SL&FR=nnn.nnnnn Set RX frequency to nnn.nnnnn MHz "OK" / "ERROR"

SL&FR? Get RX frequency "nnn.nnnnn MHz"

SL&FT=nnn.nnnn Set TX frequency to nnn.nnnnn MHz "OK" / "ERROR"

SL&FT? Get TX frequency "nnn.nnnnn MHz"

SL&C? Get Centre Frequency 'nnn.nnnnn MHz'

SL&+=nn Set both RX and TX frequencies nn channels above the

Center frequency

Frequency = Center frequency + nn * Channel spacing,

where nn=[0...Number of channels/2]

"OK" or "ERROR"

SL&-=nn Set both RX and TX frequencies nn channels below the

Center frequency

Frequency = Center frequency – nn * Channel spacing,

where nn=[0…Number of channels/2]

"OK" or "ERROR"

SL&N?

Get current frequency deviation from center frequency as

channels

(Frequency – Center frequency)/Channel spacing

"+nn" or "-nn"

SL&W? Get Channel spacing "12.5 kHz",

"20 kHz"

or "25 kHz"