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Frequency Meter/Counter
AD8660provides a counter which can measure various parameters of external
input signal such as frequency, period, duty cycle, positive pulse width and
negative pulse width. Dual channels output can work together with counter.
Enable the Counter
Press MEAS button of the front panel to enable the counter and measurement
Manu. External signal for measurement can be inputted by Input connector(AC
coupling) or Trig IN(DC coupling). The result will be displayed on the screen in real
time. The lowest frequency workable is 0.01 Hz. （GATE TIME:100S）。
Press COUN button to enter external pulse counter function. At this time
COUN button is turned into FREQ button. Repeat pressing this button to switch
between FREQ and COUN.
When the Frequency Meter/Counter is turned on, press STOP button to pause and
press ZERO button to reset.
Key Point：
Amplitude of signal inputted should be bigger than 1.5V. Maximum safe
voltage inputted from Input and Trig IN is 5V. The Uplink function need to be
turned off when using Counter/Meter.
AD8660 Series User's Manual
2-1 Frequency Meter/Counter Interface
AD INSTRUMENTS
27
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