Keysight N9927-90001 User’s Guide 437
Noise Figure Mode (Option 356 – CPU2 Only)
How to use Auto-Integration
these cases, since the jitter goal has not been reached, a jitter warning marker
will appear on the data trace (unless disabled by the user), indicating that the
jitter goal could not be achieved within the selected time constraint.
Due to the stability of the FieldFox receiver with its internal reference switch
and the design of the auto integration feature, it is possible to achieve a stable,
accurate, low jitter measurement results even under challenging measurement
conditions, such as when measuring low noise power output devices at high
frequencies with no pre-amplifier, by setting very long maximum integration
times. For example, stable measurements with 0.1 dB jitter and no discernible
drift have been demonstrated measuring a low gain, low noise amplifier at
50 GHz using maximum integration times of 5000 seconds per point, in spite of
ambient temperature drift of several degrees Centigrade over the course of the
measurement.
While auto integration can achieve very low jitter measurements, it is a good
practice to consider the contribution of the jitter uncertainty to the total
measurement uncertainty when selecting a jitter goal. If the measurement
uncertainty from other contributors is known to be 0.5 dB, for example, it
would make little sense to set a jitter goal of 0.1 dB. Setting a jitter goal of
0.3 dB in this case would only increase the RSS uncertainty to 0.58 dB, and
would potentially speed up the measurement by a factor of 9 relative to a jitter
goal of 0.1 dB. Auto integration makes it possible to select the jitter level with
confidence, and is therefore a valuable tool in obtaining the required level of
accuracy with the fastest possible measurement time.
Auto-Integration Procedure
No user cal was performed for this measurement, because no external preamp
was used.
Set the equipment up in an area where it will remain undisturbed for the
determined amount of measurement time. Refer to
1.
Enter the Measurement type:
Select
Measure
>
Noise Figure
(default)
2.
Enter the Noise Source ENR information into a table:
Select
Measure Setup
Then choose:
—
Noise Source
then
—
ENR Mode Table
(default)
If you have previously saved your noise source’s ENR information into a
table, skip this step and proceed to step
.
Summary of Contents for N9913A
Page 6: ...6 ...
Page 106: ...106 Keysight N9927 90001 User s Guide NA Network Analyzer Mode NA Mode Settings ...
Page 202: ...202 Keysight N9927 90001 User s Guide SA Spectrum Analyzer Mode Channel Measurements ...
Page 444: ...444 Keysight N9927 90001 User s Guide Noise Figure Mode Option 356 CPU2 Only Troubleshooting ...
Page 470: ...Data Analysis Features All about Scale Settings 470 Keysight N9927 90001 User s Guide ...
Page 546: ...546 Keysight N9927 90001 User s Guide Connector Care Review ...
Page 548: ...548 Keysight N9927 90001 User s Guide Connector Care Review ...
Page 550: ...550 Keysight N9927 90001 User s Guide Specifications Data Sheet ...
Page 553: ...553 Keysight Handheld Analyzers N99xxA User s Guide D Korean Battery Safety Translation ...
Page 554: ...554 Keysight N9927 90001 User s Guide Korean Battery Safety Translation ...
Page 556: ...556 Keysight N9927 90001 User s Guide Keysight Software End User Licensing Agreement EULA ...
Page 557: ...Keysight N9927 90001 User s Guide 557 Keysight Software End User Licensing Agreement EULA ...
Page 558: ...558 Keysight N9927 90001 User s Guide Keysight Software End User Licensing Agreement EULA ...
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