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4 - Front Panel Operation
2 - Setting the Output Frequency
When you turn on the ac source, the default output frequency is a 60 Hz. Assuming the voltage output
from example 1 is in effect (120 Vrms sinewave), change the frequency to 50 Hz as follows:
Action
You can set the frequency in the same way that you set the voltage:
On the Function keypad, press Freq. On the Entry keypad, press 5 0 Enter.
1.
On the Function keypad, press Freq. On the Entry keypad, press or to
2.
increment or decrement the existing value.
3.
Rotate the front panel Frequency knob to obtain 50 Hz.
To verify the output, use the meter menu:
4.
The Meter menu is presently displaying the measured voltage and frequency of the
selected output phase. Press and to scroll through all of the measurement
functions in the Meter Menu.
3 - Setting the DC Offset
NOTE:
Because the maximum voltage that the ac source can output is limited to 425 V
cannot program a dc offset that will cause a previously programmed ac voltage to exceed
the 425 V
The dc output capability of the ac source lets you independently control the dc and ac components of the
output voltage. Program a dc offset of 100 V as follows:
Action
On the Function keypad, press Voltage and then press until you access the
1.
OFFSET command.
2.
On the Entry keypad, press 1 0 0 Enter.
3.
On the Function keypad, press Shift Output to access the output coupling command.
Note: When the output coupling is set to ac, the ac source regulates the dc output
voltage to 0, regardless of any programmed voltage offset.
Press and Enter to change the output coupling to DC.
4.
5.
The ac source output now combines the previously programmed ac rms voltage and
the dc offset voltage. This is indicated by the OUTPUT AC+DC annunciator. The
front panel meter is measuring a 120 Vrms sinewave offset by 100 Vdc. This is
indicated by the METER AC+DC annunciator.
To measure just the ac or just the dc portion of the output:
6.
On the Function keypad, press Input to access the metering functions.
Press until you access the DC parameter and press Enter. This changes the
7.
metering function to dc, which measures just the dc portion of the output in volts.
The meter annunciator indicates METER AC
Press Input again. Press until you access AC and press Enter. This changes the
8.
metering function to ac, which measures just the ac portion of the output in rms volts.
The meter annunciator indicates METER DC
48
+ offset 425 V).
limit (ac
peak
peak
Display
FREQ
50
FREQ
50
FREQ
50
120 V
50 Hz
, you
peak
Display
OFFSET
0
OFFSET
100
OUTP:COUP AC
OUTP:COUP DC
156 V
50 Hz
INP:COUP ACDC
INP:COUP
DC
100 V
50 Hz
INP:COUP
AC
120 V
50 Hz
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