Description Of Keys; Power; Select Function; Autoset/Preset - Fluke PM6690 Operator's Manual

Using the Controls

Description of Keys

Power

The ON/OFF key is a toggling secondary
power switch. Part of the instrument is always
ON as long as power is applied, and this
standby condition is indicated by a red LED
above the key. This indicator is consequently
not lit while the instrument is in operation.

Select Function

This hard key is marked MEAS FUNC.
When you depress it, the menu below will
open.
Fig. 2-1 Select measurement function.
The current selection is indicated by text in-
version that is also indicating the cursor posi-
tion. Select the measurement function you
want by depressing the corresponding softkey
right below the display.
Alternatively you can move the cursor to the
wanted position with the RIGHT/LEFT arrow
keys. Confirm by pressing ENTER.
A new menu will appear where the contents
depend on the function. If you for instance
have selected Frequency, you can then select
between Frequency, Frequency Ratio and
Frequency Burst. Finally you have to decide
which input channel(s) to use.

Autoset/Preset

By depressing this key once after selecting the
wanted measurement function and input chan-
2-6 Description of Keys
nel, you will most probably get a measure-
ment result. The AUTOSET system ensures
that the trigger levels are set optimally for
each combination of measurement function
and input signal amplitude, provided rela-
tively normal signal waveforms are applied. If
Manual Trigger has been selected before
pressing the AUTOSET key, the system will
make the necessary adjustments once
(Auto Once) and then return to its inactive
condition.
AUTOSET performs the following functions:
•
Set automatic trigger levels
•
Switch attenuators to 1x
•
Turn on the display
By depressing this key twice within two sec-
onds, you will enter the Preset mode, and a
more extensive automatic setting will take
place. In addition to the functions above, the
following functions will be performed:
•
Meas Time
Set
•
Hold-Off
Switch off
•
HOLD/RUN
Set
•
MATH/LIM
Switch off
•
Analog
Switch off
•
Timebase Ref
Set
•
Arm
Switch off
n
Default Settings
An even more comprehensive preset function
can be performed by recalling the factory de-
fault settings. See page 2-13.

Move Cursor

There are four arrow keys for moving the cur-
sor, normally marked by text inversion,
around the menu trees in two dimensions.
200 ms
to
RUN
to
Digital Filters
and
Int
to ernal
ing