B&K Precision 2658A - Manual - Manual (Page 36)

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11.2 AUTO Mode
By pushing , the optimum RBW is set based on the frequency span and sweep time.
* When AUTO mode is set, “
*
” is displayed on the right end of RBW setting value display.
11.3 ALL AUTO Mode
By pushing , the optimum RBW, VBW and sweep time are set based on the frequency span.
* When ALL AUTO mode is set, “
*
” is displayed on the right end of each setting value display.
* When RBW is set to 3 kHz or 10 kHz, the selectivity at 60 dB becomes larger than an actual value due to SSB
phase noise.
12. Video Bandwidth
When is pushed, the following function menu is displayed.
12.1 MANUAL Mode
By pushing or rotating , MANUAL mode is set.
By rotating , VBW is set as follows.
100Hz 300Hz 1kHz 3kHz 10kHz 30kHz
100kHz 300kHz 1MHz
12.2 AUTO Mode
By pushing , the optimum VBW is set based on the frequency span and sweep time.
When AUTO mode is set, “
*
” is displayed on the right end of VBW setting value display.
MANUAL
VBW
AUTO ALL AUTO
F1 F2 F3 F4 F5 F6
F2
F3
VBW
F1
F2