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 89
BW/SWP
Activates the bandwidth function and accesses the
softkey menus to control resolution bandwidth,
video bandwidth and sweep time.
RBW
Key access: [BW/SWP] > {RBW}
Changes the 3 dB resolution bandwidth on the
analyzer from 30 Hz to 1 MHz in a 1, 3, 10
sequence using the knob, step keys or the numeric
keypad.
As the resolution bandwidth is decreased, the
sweep time is modified to maintain amplitude
calibration. Resolution bandwidth is also related to
span. As the span is decreased, the resolution
bandwidth decreases. As the resolution bandwidth
changes, the video bandwidth, if in auto couple
mode, changes to maintain the VBW/RBW ratio.
A “#”mark appears next to RBW on the display
when it is not coupled.
VBW
Key access: [BW/SWP] > {VBW}
Changes the analyzer post- detector filter from
3 Hz to 1 MHz in a 1, 3, 10 sequence using the
knob, the step keys, or the numeric keypad.
NOTE
If an unavailable bandwidth is entered using the numeric
keypad, the closest available bandwidth in the 1, 3, 10
sequence is used.
NOTE
In non-zero span mode, the value of RBW is determined by
whether the setting for RBW is Auto or Man (manual).
NOTE
If an unavailable bandwidth is entered using the numeric
keypad, the closest available bandwidth in the 1, 3, 10
sequence is used.