Tektronix RSA6100A Series, Help Manual

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Amplitude Corrections Internal Settings Tab
Internal Attenuator
The Internal Attenuator setting can be set to Auto or manual. When Auto mode is enabled, the attenuation
setting is displayed but is not adjustable. When Auto is disabled, the attenuator operates in manual mode,
allowing you to set the internal attenuation. The internal attenuation setting range is 0 - 75 dB.
Internal Preamp
If your instrument has Option 01 installed, use this setting to switch the preamp on or off.
Monitor Attenuator Use
The input attenuator relays are rated for several million cycles. Some measurement settings result in high
rates of attenuator switching and could prematurely age the relays. Enabling this function causes the
instrument to monitor the attenuator switching rate. When a high rate of switching is maintained for more
than an hour, the instrument will halt acquisitions and display a message about the condition. To restart
acquisitions, press Run. If the check box is not selected, the monitoring function is disabled.
NOTE. This feature is provided to prevent accidental long-term high-rate attenuator switching (thus
extending attenuator life). If you need to run the instrument for extended period, such as overnight or over
a weekend, disable the setting to prevent the halting of acquisitions.
RF & IF Optimization
Speci fi es how the gain and bandwidth should be optimized (in the RF and IF stages of the front end). The
available settings are: Best for multiple displays, Auto, Minimize Sweep Time, Maximize Dynamic Range
(Spectrum/Spectrogram only) and Minimize Noise.
You can select RF & IF optimizations to achieve the best dynamic range, fastest sweep speed, or minimum
displayed noise. These choices affect the RF and IF attenuation levels, the selection of the acquisition
bandwidth, digitizer and the resolution of the mathematical operation performed on the acquisitions used in
varying conditions of span, reference level and resolution bandwidth. The following paragraphs describe
the effects of choosing each of the available choices.
Best for multiple displays (Default). This setting is the instrument default and is set as part of the Preset
function. When this is selected, the instrument considers all the open displays and chooses an Acquisition
Bandwidth wide enough to satisfy as many measurements as possible. Instead of optimizing the
measurement performance of the selected display, this setting decreases the incidence of non-selected
displays being unable to run because the acquisition bandwidth is set too small by the selected display.
Auto.
The Auto setting is an optimized trade-off of the competing performance choices.
Minimize sweep time. Selecting Minimize Sweep Time causes the instrument to use the widest available
acquisition bandwidth when sweeping across spans greater than the maximum available real-time span.
For instruments without Option 110 (110 MHz acquisition BW), this control has no effect. For instruments
with Option 110, the swept update rate is improved by approximately 3X compared to all other RF/IF
optimization choices.
RSA6100A Series Real-Time Spectrum Analyzers Help
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