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SCPI
COMMAND SUMMARY
positions to the bandwidth, < 20 Hz and > 100 kHz, but any
numeric is accepted. The value is compared to 1 kHz and the correct
position is determined (> 1 kHz sets the position to 100 kHz and
5
1 kHz sets the position to 20 Hz). After
*RST,
the value is 100
kHz.
l
FM:INTernal:FREQuency
<num>[freq
suffix]
IMAXimumlMINimum
l
FM:INTernal:FREQuency?
[MAXimumlMINimum]
Sets and queries the frequency (in Hz) of the internal FM source.
After
*RST,
the value is 1 MHz.
l
FM:INTernal:FUNCtion
SINusoid~SQUarelTRIagleiRAMPlNOISe
l
FM:INTernal:FUNCtion?
Sets and queries the waveform of the internal FM source.
After
“RST,
the value is SINusoid.
l
FM:SOURce
INTernallEXTernal
l
FM:SOURce?
Sets and queries the source of the FM modulating signal.
After
*RST,
the value is
EXTernal.
l
FM:SENSitivity
<num>[freq
suffix/V]
lMAXimumlMINimum
l
FM:SENSitivity?
CMAXimumIMINimum]
Sets and queries the FM Input sensitivity.
The *RST value is MAX (10 MHz/V) .
l
FM:STATe
ONlOFFlllO
l
FM:STATe?
Sets and queries the FM modulation state.
After
*RST,
the value is OFF.
Frequency Subsystem
Any two frequency setting headers
(STARt,
STOP,
CENTer,
or
SPAN) may be sent in a single message and the resulting sweep
is what was requested. The order of the headers in the message
does not make any difference in the final result. When a message is
completed, coupling equations are used to fix the unset parameters to
the
correct values. These equations specify that:
center frequency = (start + stop)
/
2
frequency span = (stop
-
start)
If more than two are sent then the last two in the message are used
to determine the sweep and no errors are given.
If only one header is sent in a message, then the assumed pairs are
center/span and start/stop. In other words, if only center is sent,
then span is kept constant (if possible) while adjusting center to the
requested value. The start/stop frequencies are updated to reflect the
changes based on the coupling equations.
HP 8360
User’s Handbook
Operating and Programming Reference
S-35