R3131 Spectrum Analyzer Operation Manual
3.3 Menu Function Descriptions
3-31
Ref Offset ON/OFF Toggles the reference level offset function on or off.
ON: Allows you to set the offset level in a range of 0 to
±100.0 dB. The relationships between the displayed ref-
erence level, the set reference level and the offset are
shown below:
Reference level (displayed) = Reference level (set) +
Offset.
OFF: Turns off the offset.
Input 50Ω /75Ω Sets the impedance input level for the display. The 75 Ω setting is
used when a 75 Ω impedance converter (ZT-130NC) is connected
to the RF input.
Apr 10/98
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