Reducing Noise; To Activate Averaging; To Change System Bandwidth - Agilent Technologies 8719ES User Manual

Optimizing Measurement Results

Reducing Noise

Reducing Noise

You can use two analyzer functions to help reduce the effect of noise on the data trace:
• activate measurement averaging
• reduce system bandwidth
• use direct sampler access configurations (Option 012 Only)

To Activate Averaging

The noise is reduced with each new sweep as the effective averaging factor increments.
1. Press
AVERAGING FACTOR
Avg
2. Enter a value followed by
3. Press
AVERAGING ON
Refer to "Averaging" on page 7-34

To Change System Bandwidth

By reducing the system bandwidth, you reduce the noise that is measured during the
sweep. While averaging requires multiple sweeps to reduce noise, narrowing the system
bandwidth reduces the noise on each sweep, however, the sweep will be slower.
1. Press
Avg IF BW
2. Enter the IF bandwidth value that you want, followed by
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 (preset) analyzer setting.
Another capability that can be used for effective noise reduction is the marker
NOTE
statistics function, which computes the average value of part or all of the
formatted trace.
If your instrument is equipped with Option 085 (High Power System),
another way of increasing dynamic range is to increase the input power to the
test device using a booster amplifier.
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