Velleman Personal Scope HPS5, Руководство пользователя

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16
PersonalScope
TM
F
Determining the frequency of a signal requires the
measurement of a period. The easiest way to do this
would be by placing the vertical markers either on
two consecutive peaks or two identical slopes of a
signal.
Setting up the voltage per division
The user can enlarge or reduce the signal on the
screen vertically by adjusting the displayed voltage per
division. (V/div = voltage per division). The divisions can
be made visible through the
Display
key (see page 16).
Press the
“t-V/div”
key
Press the
⇑
or the
⇓
key to select the sensitivity : from
5mV to a maximum of 20V per division.
F
50mV to 200V with X10 probe selection
Setting up the time base
Adjusting the time base will visualise more or
fewer periods of a signal (t/div = time per division). The
divisions can be visualised through the
Display
key (see
page 16).
Press the
“t-V/div”
key
Press the
⇐
the
⇒
key to set the time base between 20s
and 2µS per division.
ATTENTION : the positions 10µs, 4µs and 2µs only
operates correctly with periodic signals, for which the unit
will automatically select the ‘normal’ trigger mode. The
screen will be adjusted once the trigger level is reached.
NOTE: Use the minimum time base (2 microsec) as a
starting point when measuring a signal and select longer
time bases until the signal is displayed properly. Other-
wise the display may not correctly reflect the signal
under measurement due to aliasing.
Moving the signal in Y-position
Press the
“Y-pos”
key
Press the
⇑
key or the
⇓
key in order to move the signal
in the direction of the arrows. Prolonged pressing will make
the Y- position change faster. A small dot in the left-hand
corner of the screen will indicate the direction in which the
signal has moved. In this manner, the user will know in
which direction the signal was going when it went off-
screen.
t-V/div
t-V/div
Y-pos
OPERATION