Fluke PM6669 Operator's Manual page 19

Page: 18
CONTROL OPERATING THE
CONTROL
Pull the SENSITIVITY
INPUT A
SENSITIVITY
knob to switch to AC
coupling. Depress the
knob to switch to DC
MIN 10mVrms
200mVrms
coupling.
NOTE: The
potentiometer controls
the sensitivity when AC-
coupled and Trigger
Level when DC-coupled.
Turn the knob clockwise
to increase and counter
clockwise to decrease
the trigger level or
sensitivity.
One two-position switch.
INPUT A
Depress to switch on
FILTER<50kHz
the FILTER and relase
to switch it off.
EXT REF INPUT
Connect an external
10 MHz frequency
source to the BNC-
connector on the rear
10MHz 0.5-15Vrms
panel of the Frequency
Counter marked EXT
REF INPUT.
PM 6669 - OPERATORS MANUAL
OPERATING INSTRUCTIONS
DISPLAY
MEASURING TIME
SINGLE 0.2s 1s 10s
FREQ
FREQ FREQ FREQ
A B A/A A-A
0 0
DISPL TRIGGER LEVEL A
HOLD AUTO
0.
M kHz
u ms
GATE
RPM PER TOT WIDTH EXT
A A A A REF
FUNCTION
GPIB-CODE
Not adjustable
from the bus.
Not bus
controllable.
Not bus
controllable.