
I
I
Optimizing Measurements
Reducing Trace Noise
By reducing the system bandwidth you reduce the noise that is measured
during the sweep. However, the decreased bandwidth may slow down the
sweep. While averaging requires multiple sweeps to reduce noise, narrowing
the system bandwidth reduces the noise on each sweep. See the previous
section for a more detailed explanation of system bandwidth.
Press
Bandwidth
or
.
Narrower system bandwidths cause longer sweep times. When in auto sweep
time mode, the analyzer uses the fastest sweep time possible for any selected
system bandwidth. Auto sweep time mode is the default analyzer setting.
Spurious responses are undesirable signals that result from various internal
mixing products.
The analyzer has two features to eliminate spurious responses. Both features
shift the frequency of the spur without changing the RF output frequency.
They shift the spur by changing frequencies internal to the analyzer that mix
to produce the RF frequency. The features are:
l
dither
spur avoid
Dither is usually most effective for narrow frequency span measurements
(generally
MHz) as explained below. If dither does not eliminate visible
spurs, use spur avoid instead.
5-14
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Summary of Contents for 8711C
Page 36: ...I I 2 Getting Started 深圳市盛腾仪器仪表有限公司 Tel 0755 83589391 Fax 0755 83539691 Website www Sengt com ...
Page 55: ...3 Making Measurements 深圳市盛腾仪器仪表有限公司 Tel 0755 83589391 Fax 0755 83539691 Website www Sengt c ...
Page 99: ...深圳市盛腾仪器仪表有限公司 Tel 0755 83589391 Fax 0755 83539691 Website www Sengt com ...
Page 276: ...深圳市盛腾仪器仪表有限公司 Tel 0755 83589391 Fax 0755 83539691 Website www Sengt com ...
Page 340: ...I 8 Front Rear Panel 深圳市盛腾仪器仪表有限公司 Tel 0755 83589391 Fax 0755 83539691 Website www Sengt com ...
Page 364: ...9 Softkey Reference 深圳市盛腾仪器仪表有限公司 Tel 0755 83589391 Fax 0755 83539691 Website www Sengt c ...
Page 499: ...Index I 深圳市盛腾仪器仪表有限公司 Tel 0755 83589391 Fax 0755 83539691 Website www Sengt com ...