Scale And Units - Keysight N9912A User Manual

Channel number X-axis annotation
 Dn indicates Downlink frequencies.
 Up (not shown) indicates Uplink frequencies
 (−) indicates that the lowest frequency in the channel (128) is at the left edge of
 (+) indicates that the highest frequency in the channel (130) is at the right edge of
 When Center Channel or Freq Span is specified, the X-axis shows the Center Freq
 When Start or Stop Channel is specified, the X-axis shows the Start Freq (Channel)
Change Channel Step Size (Optional)
This setting allows you to use the ▲|▼ arrows to increment the channel number by
the specified value.
 Press
 Enter a step value using the numeric keypad, the ▲|▼ arrows, or the rotary knob.

Scale and Units

Adjust the Y-axis scale to see the relevant portions of the data trace.
The Y-axis is divided into 10 graticules. A Reference Level is shown on the screen as
a solid horizontal bar that can be placed at any graticule.
When RF Attenuation set to Auto, the RF Attenuation is coupled to Reference Level.
How to set Scale
Press Scale / Amptd . Then choose from the following:

 Manually set Scale, Reference Level, and Reference Position.
72
the screen.
the screen.
(Channel) and Frequency Span.
and Stop Freq (Channel).
Channel Step
Then press Enter.
Scale Type [current setting]
Logarithmic scale (default setting). The Y-axis reference line represents the
Log
o
specified absolute Reference Level in the current Unit selection. Y-axis
graticules show dB below or above the reference line.
Linear scale. The Y-axis reference line represents the specified absolute
Lin
o
Reference Level in the current Unit selection. Y-axis graticules show percent of
Reference Level (%) below or above the reference line.
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