8060A
Instruction Manual
2-28
The frequency function is fully autoranging over four ranges: 200 Hz, 2000
Hz, 20 kHz, and 200 kHz. Depending on the frequency of the ac input signal,
the 8060A automatically selects the proper range and displays the
appropriate measurement unit, either Hz or kHz. Frequencies less than 12.2
Hz are not measured reliably, and frequencies greater than 199.99 kHz cause
the OL overrange indicator to appear.
When you press the Hz button to select the frequency function, the Hz
indicator appears in the display almost immediately, and the first frequency
reading is displayed within one second. The 8060A has a one-second reading
rate for all ranges (except for frequencies between 12 and 16 Hz, which
respond in 1 to 1.3s), including the .01 Hz and .1 Hz resolution readings in
the 200 Hz and 2000 Hz range. The resolution for each range is listed in
Table 2-4.
Table 2-4. Frequency Function Autoranges and Resolution
Frequency Range Resolution
200 Hz
2000 Hz
20 Hz
200 Hz
>200 kHz Extended Range*
.01 Hz
.1 Hz
1 Hz
10 Hz
100 Hz
*Extended range enabled by holding down the Hz button at power-on.
The minimum input signal that is required to trigger the frequency counter
varies, depending on the ac voltage range selected and the frequency. The
input signal sensitivity is listed in Table 2-5. The values are based on rms
sine waves. You must increase the signal level for lower crest factor input
signals (the crest factor is the ratio of the peak voltage to the ac rms voltage
of a waveform) or non-50% duty-cycle signals. If the input signal is below
the required level, the 8060A will display 0.00 Hz, and will not take
readings. If you find that your readings are unstable, the input signal may be
near the threshold level for that range. You can correct this by selecting a
lower ac volts range.
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