3
Instrument Configuration
80
Keysight U8903A User’s Guide
Input configuration
The input signal connectors can be configured as Balanced or Unbalanced as
shown in the following figure. The Balanced configuration routes signals from the
front panel XLR input connectors to the analyzer. The signals on the positive and
negative XLR pins enter a differential amplifier where they are subtracted before
passing on to the detector. The Unbalanced configuration selects the front panel
BNC connectors as the input source. The signal in the inner conductor of the
coaxial connector is referenced to ground for measurement.
Figure 3-6
Input signal connector configuration
Summary of Contents for U8903A
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