5Key Reference
92 N9342C/43C/44C User’s Guide
BW
Activates the bandwidth function and accesses the
associated softkeys to control resolution bandwidth,
video bandwidth.
RBW
Key access: [BW] > {RBW}
Changes the 3 dB resolution bandwidth from 10 Hz
to 3 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 span is decreased, 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] > {VBW}
Changes the analyzer post- detector filter from 1 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).
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