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Model No. PI-9877
Standard Functions (Rectangle, Ramp, and Stair)
23
Ramp
Ramp Parameters
The Ramp function has four parameters: Maxi-
mum Voltage, Minimum Voltage, Period, and
Auto-repeat.
The Auto-repeat parameter determines the
total number of cycles that are output before
the function stops. For indefinite repetition, set
Auto-repeat to zero.
The
signs
of the Period and Auto-repeat
parameters (
+
or
−
) determine the shape of the
wave. The Period is positive for an ascending
ramp or negative for a descending ramp. The
Auto-repeat parameter is positive for a saw-
tooth wave or negative for a triangle wave, in
which ascending and descending ramps alternate. Set Auto-repeat to “
−
0” for an
indefinitely repeating triangle wave.
Some examples of Period and Auto-repeat settings with their resulting waveforms are
illustrated below.
Ramp Set-up
1.
Turn the Function knob to
. The display shows the
Maximum Voltage
parameter, and the Voltage LED blinks slowly to indicate that the Power Supply
is in set-up mode with no output. Turn the Coarse and Fine knobs to set the Max-
imum Voltage.
2.
To set the
Minimum Voltage
, press
and hold
(SET) until the Voltage LED
starts blinking fast. While holding the button, turn the Coarse and Fine knobs.
Release the button.
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Period
Auto-
repeat
Waveform
Comments
1.3
0
The sign of Period determines whether the
ramp is ascending (
+
) or descending (
−
).
Auto-repeat is set to zero for indefinite
repetition.
−
1.3
0
1.3
2
The sign of Auto-repeat determines whether
the wave is sawtooth (
+
) or triangle (
−
).
Period and Auto repeat set the length and
number of
full
cycles. For a triangle wave, a
full cycle consists of an ascending
and
a
descending ramp.
1.3
−
2
2.6
−
2
2.6
−
0
Ramp Defaults:
Max. Voltage
18 V
Min. Voltage
0 V
Period
10 s
Auto-repeat
0
Содержание PI-9877
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