Agilent Technologies N8201A Service Manual Page 56

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56 Agilent N8201A Performance Downconverter Synthetic Instrument Module, 250 kHz to 26.5 GHz
2 Amplitude / Y Scale
Y Axis Units
Displays the menu keys that enable you to change the vertical (Y) axis amplitude units. The
N8201A retains the entered Y Axis Units separately for both Log and Lin amplitude scale
types. For example, if Scale Type has been set to Log, and you set Y Axis Units to dBm,
pressing Scale Type (Log) sets the Y Axis Units to dBm. If Scale Type has been set to Lin and
you set Y Axis Units to Volts, pressing Scale Type (Lin) sets the Y Axis Units to Volts.
Pressing Scale Type (Log) again sets the Y Axis Units back to dBm.
Y Axis Units, in conjunction with the Scale Type, affect how the data is read off the display,
markers, and over the remote interface. When using the remote interface no units are
returned, so you must know what the Y-Axis units are to interpret the results.
Key Path: AMPLITUDE / Y Scale
Dependencies/Couplings: This key is unavailable (grayed out) when the FM Demod
View is on.
State Saved: Saved in Instrument State
Factory Preset:
For Scale Type (Log) = dBm
For Scale Type (Lin) = Volts
Remote Command:
:UNIT:POWer
DBM|DBMV|DBMA|V|W|A|DBUV|DBUA|DBUVM|DBUAM|DBPT|DBG
:UNIT:POWer?
Remote Command Notes:
The settings of Y Axis Units and Scale Type, affect how the data is read over the remote
interface. When using the remote interface no units are returned, so you must know what
the Y-Axis units are to interpret the results:
Example 1, set the following:
Scale Type (Log)
Y Axis Units, dBm
Scale/Div, 1 dB
Ref Level, 10 dBm
This sets the top line to 10 dBm with each vertical division representing 1 dB. Thus, if a
point on trace 1 is on the fifth graticule line from the top, it represents 5 dBm and will read
out remotely as 5.
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