Agilent Technologies 8960 10 Series Reference Manual page 568

Timebase Description/Configuration
Timebase Description/Configuration
February 14, 2000
Description
The time base source is selected by the test set, either an internal time base or an external source (if a suitable
signal is detected) is used as the reference oscillator. If a 10 MHz +/- 100 ppm signal, that has an input level
from 0 to +13 dBm is connected to the 10 MHz REF IN connector on the rear panel, the test set will
automatically select the external timebase.
The user can read the status window at the bottom of the test set display for the EXT REF indicator, or query
the test set to verify if it is using an external time base or an internal time base. The user may also query the
test set to verify if the time base is locked. The reference oscillator functionality is controlled through the
SYSTEM subsystem.
Example:
OUTPUT 714;"SYSTEM:ROSCILLATOR[:TIMEBASE]?" !returns INT or EXT
!(internal or external) timebase.
OUTPUT 714;"SYSTEM:ROSCILLATOR:LOCKED?" !returns 1 or 0 (locked or unlocked)
!condition for timebase
Related Topics
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"SYSTem:ROSCillator" on page 495
"Rear Panel Connectors" on page 547
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