HP 8360 User Handbook Manual page 333

Frequency Subsystem
HP 8360
User's Handbook
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
l
FM:INTernal:FREQuency? [MAXimumlMINimum]
l
Sets and queries the frequency (in Hz) of the internal FM source.
After *RST, the value is 1 MHz.
FM:INTernal:FUNCtion SINusoid~SQUarelTRIagleiRAMPlNOISe
l
FM:INTernal:FUNCtion?
l
Sets and queries the waveform of the internal FM source.
After "RST, the value is SINusoid.
l
FM:SOURce?
l
Sets and queries the source of the FM modulating signal.
After *RST, the value is EXTernal.
FM:SENSitivity <num>[freq suffix/V] lMAXimumlMINimum
l
FM:SENSitivity? CMAXimumIMINimum]
l
Sets and queries the FM Input sensitivity.
The *RST value is MAX (10 MHz/V) .
FM:STATe ONlOFFlllO
l
FM:STATe?
l
Sets and queries the FM modulation state.
After *RST, the value is OFF.
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.
Operating and Programming Reference S-35