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What is the required signal level for the 1856D and 1823A counters to detect and measure frequency?

Last Updated: May 01, 2014 03:28PM PDT
Applicable Models: 1823A, 1856D

Q:  What is the required signal level for the 1856D and 1823A counters to detect and measure frequency?

A:

Model 1823A

Input A and B:
Sensitivity: 0.1 Hz to 1 Hz: 250 mV
                1 Hz to 100 MHz: 30 mV

Max. input level:
1823a_maxinput.jpg


Input C:
Sensitivity:
25 mV from 80 MHz to 150 MHz
20 mV from 150 MHz to 2.0 GHz
60 mV from 2.0 GHz to 2.4 GHz

Max. input level:
3 Vrms sine wave




Model 1856D

Input A:
Sensitivity: 30 mVrms

Max. input level:
1856d_maxinputa.jpg


Input C:
Sensitivity:
15mV from 80 MHz to 2000 MHz
20mV from 2000 MHz to 3.0 GHz
30mV from 3.0 GHz to 3.2 GHz
50mV from 3.2 GHz to 3.5 GHz

Max. input level:
3 Vrms sine wave
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