B&K Precision 4084-4087 - Manual - Manual (Page 34)

4080 series Function & Arbitrary/Function Generators –Instruction Manual
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“BEEP” setting
Turns the key beep on or off.
Select OFF(“1: CLOSE”) or ON (“2: OPEN”). The default is
ON.
Example for system function setting
Configuration: Set power on state [POWER ON] to default and output impedance to 50Ώ
Press【Shift】 【system】 (enter systems menu)
Press【menu】, “POWER ON”, press【1】 【N】 (set power on state to default)
Press【menu】, select “OUT Z”, press【2】 【N】 (configure for load impedance of 50Ω)
4.8 Universal Counter
Overview of Counter functions
This instrument contains a counter with frequency measurement and totalize functionality which is
completely independent from the Arbitrary/function generator section. The range of the frequency
measurement function is 1Hz ~ 100MHz. Repeatedly pressing 【Shift】 【Count】will toggle between
Frequency measurement and Totalize mode.
Press【Shift】and【F.C./TOT】once to activate the frequency measurement mode. Symbols “Ext”
and “Freq” will be displayed in the state field and “WAITING” will flash on the main display. The
unit is now ready to measure and display the frequency of a signal applied to the input terminal
“Meas Freq/TOT IN” in the rear panel. When totalize mode is active, symbols “Ext” and “Count”
will be displayed on the status field along with the result for the count on the main display (“0” is
displayed until a valid signal is detected). The unit is now ready to totalize events represented by the
signal applied to input terminal “Meas Freq/TOT IN” in the rear panel
In event counting mode, press the 【◄】key to start and stop the event counter. When stopped, the
current count will be displayed. Press【►】key to reset the event counter to zero and resume
counting.
Gate time
Only applies to frequency measurement mode. Press【Shift】 【gate】to enter a gate time setting.
Either the numerical keypad or the knob can be used to enter a gate time value. If the gate is open,
the symbol “GATE” is displayed in the counter state field on the right. The range of gate times is
10ms ~ 10s
Low pass filter
By pressing 【Shift】 【LPF】, the input signal will be passed through a low pass filter before being
passed onto the counter circuit. The word “Filter” appears on the right display field to indicate that
the Low Pass Filter is active.
Attenuation
Press【Shift】 【ATT】 to activate the attenuator which attenuates the input signal by a factor 10:1.
“ATT” is displayed on the right to indicate that the input attenuator is active.