114 Keysight N9938-90003 User’s Guide
SA (Spectrum Analyzer) Mode (Option 233–Mixed Analyzers)
SA Mode Settings
— Then choose from the following:
—Center Channel
Places the center frequency of the specified channel
in the middle of the X-axis.
—Start Channel
Places the lowest frequency of the specified channel at
the beginning of the X-axis.
—Stop Channel
Places the highest frequency of the specified channel at
the end of the X-axis.
—Freq Span
Changes the span of frequencies while the center frequency
remains unchanged.
—Follow each of the above settings by entering a value using the
numeric keypad or the rotary knob.
—Use the arrows to increment the channel number by an amount
specified by the Channel Step value (see below).
—Then press Enter
or Enter.
Select either Uplink or Downlink Frequencies
Press Freq/Dist then More. Press Chan Direction to toggle between Uplink
and Downlink
. If either of these selections is not available, then the selected
Radio Standard does not contain those frequencies. In that case, Chan
Direction is grayed out.
Channel number X-axis annotation
— Dn indicates Downlink channels.
— Up (not shown) indicates Uplink channels
— (−) indicates that the lowest frequency in the channel (128) is at the left
edge of the screen.
— (+) indicates that the highest frequency in the channel (130) is at the right
edge of the screen.
Integration BW (IBW) is coupled to the Frequency Span setting. Frequency
Span is 50% wider than the IBW (e.g., if the IBW value is 1 MHz, then the
Frequency Span value is 1.5 MHz).
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