152                                                                                                                     Keysight N9927-90001 User’s Guide
SA (Spectrum Analyzer) Mode
SA Mode Settings
—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. 
— When Center Channel or Freq Span is specified, the X-axis shows the 
Center Freq (Channel) and Frequency Span.
— When Start or Stop Channel is specified, the X-axis shows the Start Freq 
(Channel) and Stop Freq (Channel).
Change Channel Step Size (Optional)
This setting allows you to use the   arrows to increment the channel 
number by the specified value. The Channel Step
 softkey appears only when it 
is valid. Learn how to make it valid in the section, “See How to change the 
Channel Number of the measurement”?
—Press Freq/Dist
 then More.
—Press Channel Step
— Enter a step value using the numeric keypad, the   arrows, or the rotary 
knob. Then press Enter
.