PeakTech 3443 Operation Manual page 59

5.4. Frequency / Duty Cycle % measurements
1. Set the function switch to the "Hz%" position.
2. Use the MODE key to switch between Frequency (Hz) and Duty
Cycle (%)
3. Insert the black test lead into the negative COM-jack and the red
test lead banana plug into the positive V//CAP/Hz%/Temp
jack.
4. Touch the test probe tips to the circuit under test.
5. Read the frequency in the display. The digital readings will
indicate the proper decimal point, symbols (Hz, kHz, MHz, %)
and value.
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