I
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I
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Special Functions
9
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ROSC
SOURCE
This function allows you to set the frequency standard to be used by the
sweeper. When this function is used to select the frequency standard, the
automatic reference selection switch will be turned off. The three frequency
standard selections are:
INT
Sets the sweeper to use its internal frequency standard as its
reference.
EXT
Sets the sweeper to accept an external frequency standard
as its reference.
NONE
Sets the sweeper to free-run operation, where no frequency
standard is used.
NOTE
Selecting INT on an instrument without Option
lE5,
or EXT without an external reference
connected, can cause poor frequency accuracy and synthesizer unlocks.
15-14
Associated SCPI Commands
ROSCillator:SOURce
INTernal
Sets the Irequeny standard to
interna/
ROSCillator:SOURce
EXTernal
Sets the frequency standard to
externa,!
ROSCillator:SOURce
NONE
Sets the
frequeny
standard to none.
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General