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80 Series III
Users Manual
26
Table 7. Functions and Trigger Levels for Frequency Measurements
Function Range
Approximate
Trigger Level Typical Application
K 4 V, 40 V, 400 V,
1000 V
0 V Most signals.
K 400 mV 0 V High-frequency 5 V logic signals. (The dc-coupling of the L function can
attenuate high-frequency logic signals, reducing their amplitude enough
to interfere with triggering.)
L 400 mV 40 mV Refer to the measurement tips given before this table.
L 4 V 1.7 V 5 V logic signals (TTL).
L 40 V 4 V Automotive switching signals.
L 400 V 40 V Refer to the measurement tips given before this table.
L 1000 V 400 V
ReEG Frequency counter characteristics are not specified for these functions.
\ All ranges 0 A AC current signals.
µAF 400 µA Refer to the measurement tips given before this table.
^ 40 mA
AF 4 A