Functions And Trigger Levels For Frequency Measurements - Fluke 80 Series III User Manual

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