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MS278XB OM 4-11
Bandwidth Menu
The Bandwidth menu lets you select between automatic or manual resolution bandwidth and set the
resolution and video bandwidths when in the manual mode.
Table 4-7. Bandwidth Menu
RBW: To change the resolution bandwidth when in the manual mode, press in the RBW
parameter field and enter a new value using the numeric keys. When a new value is
entered, the terminator fly-out will appear with the available units. Press on the desired
units to terminate the entry.
Range: 10 Hz to 8 MHz
Resolution: 1,2,3,5 steps (10 Hz, 20 Hz, 30 Hz, 50 Hz, 100 Hz…)
Default: Auto (see Span/RBW)
Terminators: GHz, MHz, kHz, Hz, Cancel
To toggle between resolution bandwidth modes, press the Manual/Auto button.
VBW: To set the video bandwidth when in the manual mode, press in the VBW
parameter field and enter a value using the numeric keys. When a new value is entered,
the terminator fly-out will appear with the available units. Press on the desired units to
terminate the entry.
Range: 1 Hz to 10 MHz
Resolution: 1,2,3,5 steps (10 Hz, 20 Hz, 30 Hz, 50 Hz, 100 Hz, etc.)
Default: Auto (see VBW/RBW)
Terminators: GHz, MHz, kHz, Hz, Cancel
Sweep Time: To set the sweep time when in the manual mode, press in the Sweep Time
parameter field and enter a value using the numeric keys. When a new value is entered,
the terminator fly-out will appear with the available units. Press on the desired units to
terminate the entry.
Range: 5 ms to 10 ks (0.1 ms to 10 ks in zero span)
Resolution: 1 ms or 1% of upper bound of range (100 µs in zero span)
Default: Auto = k * Span / (RBW)
2
if VBW is ≥ RBW or
Auto = k * Span / (VBW * RBW) if VBW < RBW where:
k (k-factor) = 1.8 for Auto-speed mode
k (k-factor) = 5 for Auto-Accy mode
Terminators: ks, s, ms, µs, Cancel
To toggle between manual or automatic sweep time modes, press the Manual /Auto
button.