186 U1253B User’s and Service Guide
7 Specifications
Frequency counter specifications
[1]
The maximum measurement level is < 30 Vpp.
[2]
All frequency counters are susceptible to error when measuring low-voltage,
low-frequency signals. Shielding inputs from picking up external noise is critical
for minimizing measurement errors. For non-square wave signals, an additional
5 counts need to be added.
[3]
The minimum measurement frequency of low frequency is set by power-on
option to speed up the measurement rate.
Table 7- 1 3 Frequency counter (divide 1) specifications
Range Resolution Accuracy Sensitivity
Minimum
input freq.
99.999 Hz 0.001 Hz 0.02%+3
[2]
100 mVrms
0.5 Hz
999.99 Hz 0.01 Hz
0.002%+5
< 985 kHz
9.9999 kHz 0.0001 kHz
99.999 kHz 0.001 kHz
999.99 kHz 0.01 kHz 200 mVrsm
Table 7- 1 4 Frequency counter (divide 100) specifications
Range Resolution Accuracy Sensitivity
Minimum
input freq.
9.9999 MHz 0.0001 MHz
0.002%+5
< 20 MHz
400 mVrms
1 MHz
99.999 MHz 0.001 MHz 600 mVrms
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