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Chapter 8 Specifications
Frequency and Period Characteristics
Measuring Characteristics
Frequency and Period
Measurement Method:
Reciprocal-counting technique.
AC-coupled input using the
ac voltage measurement function.
Voltage Ranges:
100 mV rms full scale to 750 V rms.
Auto or manual ranging.
Gate Time:
10 ms, 100 ms, or 1 sec
Settling Considerations
Errors will occur when attempting to measure the frequency or
period of an input following a dc offset voltage change. The input
blocking RC time constant must be allowed to fully settle ( up to
1 sec ) before the most accurate measurements are possible.
Measurement Considerations
All frequency counters are susceptible to error when
measuring low-voltage, low-frequency signals. Shielding
inputs from external noise pickup is critical for minimizing
measurement errors.
Operating Characteristics
Function
Digits
Frequency,
6
1
2
Period
5
1
2
4
1
2
System Speeds
[ 5 ]
Configuration Rates
Autorange Time
ASCII readings to RS-232
ASCII readings to HP-IB
Max. Internal Trigger Rate
Max. External Trigger Rate to Memory
Max. External Trigger Rate to HP-IB/RS-232
Specifications are for 1-hour warm-up at 6
[ 1 ]
Relative to calibration standards.
[ 2 ]
20% overrange on all ranges, except 750 Vac range.
[ 3 ]
Input > 100 mV.
[ 4 ]
For 10 mV input, multiply % of reading error x10.
1
Speeds are for 6
digits, Delay 0, Display OFF,
[ 5 ]
2
and Fast AC filter.
[ 5 ]
Reading/s
1
9.8
80
14/sec
<0.6 sec
55/sec
80/sec
80/sec
80/sec
80/sec
1
digits.
2
8
221
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