Commands Listed in Alphabetical Order
PHAseref:CH<
x>:STAtus? (Query Only)
This is a query only, and it returns the results of the most recent phase reference
characterization of the Phase Reference Module speciļ¬ed by CH <x>, where <x>
is a channel a
ssociated w ith the compartment in which the Phase Ref Module is
installed. You can use either of the two channels associated with the compartment.
For example, if the module is installed in the CH 7/CH8 compartment, x can be
7 or 8. The string returned is one of the following:
Characterization required. This status indicates that you need to characterize
the clock connected to the currently selected and enabled Phase Reference
module. Either you have not run a successful characterization since you
connected the clock and turned phase correction on, or you have changed the
clock in
put, or the clock has changed in amplitude, offset or shape, o r you
have changed one or more of the following settings:
Changed
the Phase Ref mode (except when setting to Off)
Recalled a setup
Recalled the Factory/Default setup
Compensated the main instrument
Recalled a main instrument compensation
Changed the Trigger level*
Cha
nged the Trigger slope*
Changed the Trigger source*
Changed the Clock recovery source when trigger source is clock recovery*
Changed the Clock recovery rate, enum or user adjustable, for the selected
clock recovery channel when trigger source is clock recovery*
NOTE. Changes to these trigger controls only cause Required status when made
i
n Triggered Phase Ref Mode.
Changed Phase reference input frequency
Compensated the Phase Reference Module
Recalled a Phase Reference Module compensation
DSA/CSA/TDS8X00/B Series Programmer Manual 2-265
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