User`s guide
Table Of Contents
- Overview
- Getting Started
- System Setting
- Making Measurements
- Measuring Multiple Signals
- Measuring a Low-Level Signal
- Improving Frequency Resolution and Accuracy
- Making Distortion Measurements
- One-button Power Measurement
- Making a Stimulus Response Transmission Measurement
- Measuring Stop Band Attenuation of a Low-pass Filter
- Making a Reflection Calibration Measurement
- Measuring Return Loss Using the Reflection Calibration Routine
- Making an Average Power Measurement
- Key Reference
- SCPI Command Reference
- Error Messages
- Menu Map
Key Reference 5
N9340A User’s Guide 79
Preamp
Key access: [AMPTD] > {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 actual 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.
Scale/DIV
Key access: [AMPTD] > {Scale/DIV}
Sets the logarithmic units per vertical graticule
division on the display.
Scale Type
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 graticule
is one- tenth of the reference level in volts.)
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.