Fluke PM 6666 Operator's Manual page 15

FUNCTION AND RANGE
The timer counter will measure the positive and negative
peak voltage an display them as voltage relative to 0 V.
Range:
The set Measuring-time controls the time during which the
main gate is opened, allowing pulses to enter the counting
logic. A longer Measuring-time gives higher resolution re-
adouts with more digits displayed.
The time the gate is open is not exactly the preset Measur-
ing-time, because the Timer/Counter synchronizes the
measurement with the input signal in order to measure com-
plete periods. If the period of the input signal is longer than
the set Measuring-time, the main gate does not close again
until the period is completed.
For PER A and TIME A-B exactly one period or one time in-
terval is measured. The minimum result possible is 100 ns.
The display time will be 100 ms.
When set to SINGLE and FREQ A, the Measuring-time is
one cycle of the input signal or 3 ms, whichever is longest.
When set to SINGLE and FREQ C, the Measuring-time is
3 ms.
A Frequency-A measurement will result in 6 to 7 digits on
the display.
A Frequency-A measurement will result in 7 to 8 digits on
the display.
A Frequency-A measurement will result in 8 to 9 digits on
the display.
OPERATING INSTRUCTIONS
–51 V to +51 V.
HINTS AND COMMENTS
The attenuator will switch in and out automatically when
needed during voltage measurements regardless if AUTO
LEVEL is selected or not.
If you wish to do one measurement instead of repetitive
measurements, see DISPL HOLD.
When TOT A B or TOT A
Measuring-time setting will be used to set the display time.
The input frequency is limited to 16 MHz for FREQ A and
PER A.
If external reference is used, the EXT REF indicator will not
be switched-on until after the first measurement.
B is selected, the
PM 6666 - OPERATORS MANUAL
Page: 15