Fonction FREQ
VIII - 44 Function Generators
Frequency meter function “FREQ”
Selecting the FREQ function activates measurement of the frequency of the
signal input to the FREQ EXT terminal.
The frequency meter can measure frequencies from 5 Hz to 100 MHz with the
following precision:
< 50 mV sensitivity F
≤
30 MHz
< 60 mV sensitivity for 30 MHz < F
≤
80 MHz
< 90 mV sensitivity for 80 MHz < F
≤
100 MHz
The maximum amplitude (*) of the measured signal is:
300 V sensitivity from 5 Hz to 5 kHz
30 V sensitivity from 5 kHz to 1 MHz
10 V sensitivity above this value
(*)
signal with a 50% duty cycle.
Measurement stabilisation time depends on the input frequency:
≤
1 s from 5 to 20 Hz (
≥
1 measurements per second)
≤
100 ms from 20 to 400 Hz (2 measurements per second)
≤
40 ms from 400 Hz to 100 MHz (2 measurements per second)
Indication of the 300 V protection (50 - 60 Hz) CAT I
Connections
FREQ EXT terminal
for the measured
signal