HP 8648 A/B/C/D - Changpuak.ch

Note
FM Subsystem
To set or change the FSK level, the data rate must be set properly. For
example, when you want to set the data rate to 6400 bps, 4-level FSK
for FLEX pagers, send the following commands:
PAG:FLEX:RATE 6400
DM:FORM FSK4
DM:DEV 4.8 KHZ
DM:STAT ON
[SOURceI
:FM
[ : DEViat ion] ?
[:DEViation] [Cf reqterm>]
Sets FM deviation. *RST value is 3 kHz.
: STATe?
: STATe ON 1 OFF 1 1 1 0
Turns FM modulation ON or OFF. FM is not turned on by just setting
FM:DEViation. Turning FM modulation ON will not automatically turn
OFF any other types of modulation. Turning any or all modulation
types ON or OFF must be done explicitly. If a modulation type is
turned ON while another modulation type is ON, an execution error
-221 is generated, and the state of the instrument is unchanged.
*RST value is OFF.
: SOURce?
: SOURce INTernal[ll[,EXTernal] I
EXTernalC, INTernalL I I INTernal
Selects FM source. *RST value is INTernal. INTernal is the internal
Option 1 E2 Modulation Generator.
:EXTernal
:COUPling?
:COUPling AC I DC
Sets source coupling for FM. The GROund parameter defined by the
1991 SCPI Command Reference (17.4.9.2) is not supported.
*RST value is DC.
:INTernal[ll
:FREQuency?
:FREQuency Cl
Sets the frequency of the FM internal signal source. Legal values are
400 Hz and 1 kHz. *RST value is 1 kHz.
:INTernal2
:FRElJuency?
:FREquency [Cfreqterm>]
Sets the FM modulation frequency using the internal audio generator
in the Option 1EP and the internal modulation generator in the
Option lE2. Legal values are 20 Hz to 10 kHz for the Option 1EP and
10 Hz to 20 kHz for the Option lE2. *RST value is 1 kHz.
HPJB Programming 2-23