HP 81101A Reference Manual page 68

Programming Reference
SCPI Instrument Command List
Command
:PULS:WIDT[1]
Long
[:SOURce]:PULSe:WIDTh[1]
Form
Set & Query
Parameter Numeric
Parameter suffix
S with engineering prefixes
*RST value
100 ns
Specified limits 10 ns to 999.5 s (max. period –10 ns)
Description
Use this command to program the width of the pulse signal. If you want
to set width as duty cycle use [:SOURce]:PULSe:DCYCle[1].
If you want the pulse width to remain constant when the pulse period is
varied (rather than the duty cycle) use
[:SOURce]:PULSe:HOLD[1] WIDTh.
Example
To set and hold the pulse width:
:PULS:WIDT 50NS
:PULS:HOLD WIDTH
Command
:ROSC:SOUR
Long
[:SOURce]:ROSCillator:SOURce
Form Set & Query
Parameter
INTernal | EXTernal
*RST value
INT
Description
Use this command to set/read the reference source for the PLL. If you
select the external reference (CLK-IN connector), you can choose to use
a 5 MHz or 10 MHz reference signal using :ROSC:EXT:FREQ.
INTernal
EXTernal
68
Set OUTPUT pulse width to 50 ns
Hold pulse width constant with varying period
Lock the PLL to its internal reference
Lock the PLL to a reference signal at the
CLK-IN connector. The external refer-
ence signal can be 5 or 10 MHz.