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OPERATING INSTRUCTIONS
D. FREQUENCY COUNTER
1. Switch on the SWF-8030 and the 5 digit LED display lights up.
2. COUPLING (3): The frequency counter has 3 coupling options.
(a). INT - To be used with the internal function generator, 0.5Hz to 3MHz.
(b). EXT AC / HF: To be used with an external high frequency (100 KHz to 60MHz)
signal.
(c). EXT DC / LF: To be used with an external low frequency (0.2Hz to 100 KHz)
signal.
3. Connect the EXT INPUT BNC (4) to the external signal source.
4. Set the TRIG level (5) to meet the input signal. If the input signal is very large, pull
out the knob (PULL INPUT x20) to have stable counting. Max. input is 20Vp-p, or
600Vp-p with x20 engaged.
5. EXT TRIG'D (6) - The green LED will indicate the operating condition of the
SWF-8030.
LED LIT - the trigger level is higher than the input signal.
LED DARK - the trigger level is lower than the input signal.
LED FLASH - normal triggering.
Display unit (7): The SWF-8030 will be on Hz or KHz automatically controlled by the CPU.
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