B&K Precision 4052-4055 - Manual - Manual (Page 62)

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The default reference frequency used by the counter is 10 MHz. Users can change this
reference frequency by selecting RefeFreq and use the rotary knob or the numeric keypad to
change the reference frequency value.
Adjust Trigger Level
The trigger level of the counter can be adjusted by selecting TrigLev from the menu. Use the
rotary knob or the numeric keypad to change the trigger level. The maximum trigger level
value is 1.8 V, and the minimum is – 3.0 V.
Counter Settings
There are some additional counter settings that can be adjusted, which may help improve
the counter measurements of some signals.
To access these settings, select Setup from the counter menu, and an expanded set of menu
options will be available.