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Key Reference 5
N9340A User’s Guide 71
Preamp
Toggles the internal preamp between On and Off.
Preamp results in a correction being applied to
compensate for the gain of the preamp at 20 dBm
so that amplitude readings show the value at the
input connector.
The preamp is set to on in frequency bands from
1 MHz to 3 GHz, otherwise the correction is not
applied even though the PA indication still appears.
Key access: [AMPTD]
Scale/DIV
Sets the logarithmic units per vertical graticule
division on the display.
Key access: [AMPTD]
Scale Type
Toggles the scale type of vertical graticule divisions
between logarithmic and linear.
When Scale Type is set to Log, a Logarithmic units
is activated ranging from 1 to 10 dB per division.
When Scale Type is set to Lin, the vertical divisions
are linearly scaled and the default amplitude units
are volts. The top of the display is set to the
reference-level value and the bottom graticule
becomes zero volts. (Each division of the tragically
is one-tenth of the reference level in volts.)
Key access: [AMPTD] > {Scale Type}
NOTE
When the preamp is on, a PA indication appears on the left
side of the display.
NOTE
The Scale/Div function is only available when the Scale Type
key is set to Log.