Agilent Technologies X Series Manual page 539

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The first set of rules is called
Auto Couple . These rules give optimal sweep times at a loss of accuracy. Note that this means that in the
Preset or Auto Coupled state, instrument amplitude accuracy specifications do not apply.
Setting
Sweep Time Rules
about three times as long, but with better amplitude accuracy for CW signals. The instrument absolute
amplitude accuracy specifications only apply when
are set to SA-Accuracy
are usually well under 0.1 dB, though this is not guaranteed. Because of the faster sweep
SA-Normal
times and still low errors,
The third set of sweep time rules is called
integrated source is turned on, such as a Tracking Generator or a synchronized external source. The
sweep times for this set of rules are usually much faster for swept-response measurements.
Stimulus-response auto-coupled sweep times are typically valid in stimulus-response measurements
when the system's frequency span is less than 20 times the bandwidth of the device under test. You can
select these rules manually (even if not making Stimulus-Response measurements) which will allow you
to sweep faster before the "Meas Uncal" warning comes on, but you are then not protected from the
over-sweep condition and may end up with uncalibrated results. However, it is commonplace in
measuring non-CW signals such as noise to be able to get excellent measurement accuracy at sweep rates
higher than those required for CW signal accuracy, so this is a valid measurement technique.
Auto
Sets the analyzer to automatically choose the Sweep Time Rules for the measurement.
Key Path
Remote Command
Example
Couplings
Preset
Initial S/W Revision
SA - Normal
Chooses Sweep Time Auto Rules for optimal speed and generally sufficient accuracy.
Key Path
Example
Dependencies
Couplings
.
SA – Normal Sweep Time Rules
to will result in slower sweep times than
SA-Accuracy
. Additional amplitude errors which occur when
SA-Normal is the preferred setting of
Stimulus/Response
Sweep/Control, Sweep Setup, Sweep Time Rules
[:SENSe]:SWEep:TIME:AUTO:RULes:AUTO[:STATe] ON|OFF|1|0
[:SENSe]:SWEep:TIME:AUTO:RULes:AUTO[:STATe]?
:SWE:TIME:AUTO:RUL:AUTO ON
Set on Preset or Auto Couple
ON
Prior to A.02.00
Sweep/Control, Sweep Setup, Sweep Time Rules
:SWE:TIME:AUTO:RUL NORM
Not available (grayed out) when Source Mode=Tracking.
Automatically selected unless Source is on
If directly selected, sets AUTO to Off
is set to
SA-Normal
is set to
Sweep Time Auto
Sweep Time Rules
Sweep Time Rules
and is automatically selected when an
Sweep/Control
on a or
Preset
, usually
SA-Normal
, and
Sweep Time Rules
are set to
.
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