Operating Instructions
Operation
2
2-29
Table 2-5. Sensitivity for the Frequency Function
Input Signal Sensitivity (based on sine wave V rms)
12 Hz to 20 kHz
20 kHz to 100 kHz
100 kHz to 200 kHz
20 mV or 10% of voltage range*
50 mV or 25% of voltage range*
150 mV or 75% of voltage range*
*Whichever value is greater.
The maximum input voltage that may be applied depends on the ac voltage
range. The maximum inputs are listed in Table 2-6.
Caution
No voltage overrange indication is given when the 8060A
is measuring frequency. To prevent possible instrument
damage, do not exceed 750V ac rms or a volt-hertz
product of 1 x10
7
when measuring frequency.
Table 2-6. Maximum Input Voltages for the Frequency Function
AC Voltage Range Maximum Useable AC Voltage*
200 mV
2V
20V
200V
750V
±5V peak
±50V peak
±500V peak
±1000V peak
±1000V peak
*Signal not to exceed a volt-hertz product of 1 x 10
7
.
In addition to the four usual frequency ranges, there is an extended frequency
range that may be enabled. To enable the extended frequency range, hold
down the Hz button as you turn on the instrument. After the power-on self-
test has been completed (the display is .8.8.8.8), release the Hz button. Now
when you select the frequency function, the autoranging can extend beyond
the 200 kHz range. The 200 mV ac voltage range is recommended for
frequencies above 200 kHz. Normally this frequency range is not enabled
because of loss of sensitivity above 200 kHz, but typically you can measure
420 kHz TTL level signals (50% duty cycle). When the instrument is turned
off, the extra range is disabled.
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