Marconi Instruments 2040 - Page 100

FREQUENCY MODULATION
FM or
FM1
or FM2
:DEVN
:INC
Data type
:
Allowed suffices
:
Default
suffix
:
:<src>
:ON
:OFF
:UP
:DN
:RETN
:XFER
DCFMNL
Data type :
Allowed suffices :
Default suffix
:
Examples:
FM? or FM1?
or FM2?
Example:
Set FM deviation
(short form)
Set FM deviation
Set FM step size
Decimal Numeric Program Data
Any one
of:
GHZ, MHZ, KHZ or HZ
HZ
Select modulation source where <src> is any one of: INTF1,
INTF2, INTF3, INTF4, INTF5, INTF6,
EXT1DC, EXT1AC,
EXT1ALC, EXT2DC, EXT2AC or EXT2ALC
Turn FM ON (locally)
Turn
FM OFF
(locally)
Go UP one step
Go DOWN one step
Return to original setting
Transfer current value to be the new setting
Perform DC FM/WBFM null operation
None
None
None
PM : DEVN 25KHZ ; INTF4 ;ON
FMlsDEVN 15KHZ ; INC 1KHZ;EXT1DC
DCFMNL
Prepares message containing information on
FM
setting in one
of the
following
formats:
:FM:DEVN
<nr2>;<src>;<status>;INC <nr2>
:FM1:DEVN <nr2>;<src>;<status>;INC <nr2>
:FM2:DEVN
<nr2>;<src>;<status>;INC <nr2>
where:
<src> is a program
mnemonic
representing the source
of the modulation signal and <status> is a program
mnemonic
indicating whether
the
modulation
is
locally ON or OFF
sFMlrDEVN 25000 .
0
; INTF1 ;ON; INC
1000.0
3-2-16
46882-074C