SOURce:PM SME
1038.6002.02 3.82 E-13
3.6.11.13 SOURce:PM Subsystem
This subsystem contains the commands to check the phase modulation and to set the parameters of
the modulation signal. The SME can be equipped with two independent phase modulators, PM1 and
PM2 (option SM-B5). They are differentiated by a suffix after PM.
SOURce:PM1
SOURce:PM2
Command Parameter Default
Unit
Remark
[:SOURce]
:PM1|2
[:DEViation]
:EXTernal1|2
:COUPling
:INTernal
:FREQuency
:SOURce
:STATe
-360 deg to +360 deg
AC | DC
400 kHz | 1 kHz | 3 kHz | 15 kHz or
0.1Hz to 500 kHz or 0.1Hz to 1 MHz
INT | EXT1 | EXT2
ON | OFF
rad
Hz
Option SM-B5
Option SM-B2 or -B6
[:SOURce]:PM1|2[:DEViation] -360 to +360 deg
The command sets the modulation depth in Radian. DEGree are accepted.
*RST value is 1 rad
Example: SOUR:PM:DEV 20DEGR
[:SOURce]:PM1|2:EXTernal1|2
The commands to check the external input of the PM modulators are under this node. The
settings under EXTernal for modulations AM, FM and PM are independent of each other. The
settings are always related to the socket determined by the suffix after EXTernal. The suffix after
PM is ignored then. With the following commands, e.g., the settings are both related to socket
EXT2:
:SOUR:PM1:EXT2:COUP AC
:SOUR:PM2:EXT2:COUP AC
A command without suffix is interpreted like a command with suffix 1.
[:SOURce]:PM1|2:EXTernal1|2:COUPling AC | DC
The command selects the type of coupling for the external PM input.
AC The d.c. voltage content is separated from the modulation signal.
DC The modulation signal is not changed. *RST value is AC
Example: :SOUR:PM:COUP DC
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