Key Reference 5
N9342C/43C/44C User’s Guide 93
As the video bandwidth is decreased, the sweep
time is increased to maintain amplitude calibration.
VBW/RBW
Key access: [BW] > {VBW/RBW}
Selects the ratio between the video and resolution
bandwidths.
If signal responses near the noise level are visually
masked by the noise, the ratio can be set to less
than 1 to lower the noise. The knob and step keys
change the ratio in a 1, 3, 10 sequence.
Avg Type
Key access: [BW] > {Avg Type}
Accesses the functions to automatically or
manually choose from one of the following
averaging type:
Log Pwr
Key access: [BW] > {Avg Type} > {Log Pwr}
Averages the data as appropriate for the
logarithmic scaled y- axis.
When average type is set to Log Pwr, “LgAv”
appears on the left side of the display.
NOTE
If an unavailable bandwidth entered using the numeric
keypad, the closest available bandwidth in the 1, 3, 10
sequence is used.
NOTE
When preset is set to default, or VBW/RBW is set to Auto,
the ratio is set to 1.
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