Martel Electronics PSC4010 - Manual (Page 31)

Table 13: Frequency Measurement/Source
Range Accuracy (% of reading ± floor)
Read 2.0CPM - 600.0CPM 0.05% ± 0.1CPM
1.0Hz - 1000.0Hz 0.05% ± 0.1Hz
1.00KHz - 10.00KHz 0.05% ± 0.01KHz
Source 2.0CPM - 600.0CPM 0.05%
1.0Hz - 1000.0Hz 0.05%
1.00KHz - 10.00KHz 0.250%
Input voltage amplitude range on frequency is 1V to 20V zero based square wave only.Output amplitude is
adjustable from 1V to 20V, and is a square wave with 50% duty cycle.For output frequency, a slight negative
offset of approximately -0.1V is present to assure zero crossing.
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