PhaseStation 53100A User’s Manual V1.04 25-Apr-2022
128
Measurements in progress that have not been saved manually at least once, or that are
running with
Autosave interval
set to a value less than one minute, will not be
automatically saved.
Enable deferred acquisition (
Ctrl-d
)
Trigger deferred acquisition(s) (
Enter
)
Deferred acquisition
mode is toggled with the
Enable deferred acquisition (
Ctrl-d
)
command. In this mode, TimeLab will allow acquisitions to be launched as usual.
However, each new measurement’s incoming data will be discarded until all pending
measurements are
triggered.
In deferred-acquisition mode, triggering occurs at the
expiration of a time interval specified in the
Acquisition options (
Ctrl-F7
)
dialog, when
the
Trigger deferred acquisition(s) (
Enter
)
command is issued, or when another
Enable
deferred acquisition (
Ctrl-d
)
command is issued to return to immediate-acquisition
mode. Data will subsequently be collected normally for the duration of the
measurement(s).
Deferred-acquisition mode can be useful when you wish to launch multiple concurrent
acquisitions – perhaps using different types of instruments with varying latency or setup
time requirements – while synchronizing the beginning of data collection as closely as
possible across all measurements. Another common application for deferred
acquisition is to wait for a given stabilization period to elapse after the instrument’s
attenuators and filters are configured at the beginning of the measurement process.
Load impedance will be relatively constant at all times when using the ‘N’ female
REFERENCE and DUT input jacks on the 53100A, due to the inherent isolation
characteristics of the built-in active splitters. However, multichannel measurements will
expose the reference and DUT sources to varying load conditions at the SMA-F channel
input jacks during the startup phase, so deferred acquisition can be a useful tool in
these cases.
Note that TimeLab doesn’t specify the trigger latency associated with a group of
deferred measurements. Triggered measurements made with time interval counters
will normally start collecting valid data within one sample period, but this isn’t
guaranteed.
Also note that the DUT frequency is initially measured when the measurement begins,
not when it is triggered. Attempting to measure an oscillator undergoing startup drift in
a narrow measurement bandwidth will usually yield drift warning messages and
questionable data regardless of the use of deferred acquisition. Always ensure that the
measurement bandwidth is sufficiently wide to keep the DUT signal well within its
passband during the deferral period, as well as the remaining duration of the
measurement itself.
Summary of Contents for PHASE STATION 53100A
Page 1: ...TM 53100A Phase Noise Test Set User s Manual Revision 1 04 April 25 2022...
Page 16: ...PhaseStation 53100A User s Manual V1 04 25 Apr 2022 16...
Page 18: ...PhaseStation 53100A User s Manual V1 04 25 Apr 2022 18...
Page 20: ...PhaseStation 53100A User s Manual V1 04 25 Apr 2022 20...
Page 30: ...PhaseStation 53100A User s Manual V1 04 25 Apr 2022 30...
Page 36: ...PhaseStation 53100A User s Manual V1 04 25 Apr 2022 36...
Page 42: ...PhaseStation 53100A User s Manual V1 04 25 Apr 2022 42...
Page 64: ...PhaseStation 53100A User s Manual V1 04 25 Apr 2022 64...
Page 74: ...PhaseStation 53100A User s Manual V1 04 25 Apr 2022 74...
Page 104: ...PhaseStation 53100A User s Manual V1 04 25 Apr 2022 104...
Page 116: ...PhaseStation 53100A User s Manual V1 04 25 Apr 2022 116...
Page 122: ...PhaseStation 53100A User s Manual V1 04 25 Apr 2022 122...
Page 130: ...PhaseStation 53100A User s Manual V1 04 25 Apr 2022 130...
Page 140: ...PhaseStation 53100A User s Manual V1 04 25 Apr 2022 140...
Page 214: ...PhaseStation 53100A User s Manual V1 04 25 Apr 2022 214...
Page 215: ...PhaseStation 53100A User s Manual V1 04 25 Apr 2022 215 Appendix Legal and regulatory notices...