Front Panel Operation
Setting the Output
4
4-21
• DUTY (Duty Cycle) When the squarewave is selected, DUTY appears, allowing
you to modify the duty cycle of the squarewave. The range is 1.00 to 99.00%. The
default is 50.00%. The duty cycle must be 50.00% if you want to enter an OFFSET
(see below).
• OFFSET (Voltage Offset) Appears when the desired output is less than 33V
(sinewaves), 65 V (squarewaves) or 93 V (trianglewaves and truncated sinewaves).
This softkey allows you to add a positive or negative dc offset voltage to the ac
output signal. See “Entering a DC Offset” later in this chapter for more information.
When a voltage output is expressed in dBm, voltage offset is not available. You can
enter an offset for a squarewave output only when the duty cycle is 50.00% (see
DUTY above).
• WAVE (Waveform) Allows you to select one of four different types of waveforms:
sinewave, trianglewave, squarewave, and truncated sinewave. (See “Waveform
Types” later in this chapter for more information). Whenever a non-sinusoidal
waveform is selected, the Output Display shows P
p
(peak-to-peak). Waveform is not
available for a sinewave output in dBm instead of volts.
4-23. Setting DC Current Output
Complete the following procedure to set a dc current output at the 5500A front panel
AUX terminals (or 5725A Amplifier BOOST terminals if a 5725A is connected). If you
make an entry error, press G to clear the display, then reenter the value.
1. Press R to clear any output from the 5500A.
2. Connect the UUT as described earlier in this chapter under “Connecting the
Calibrator to a UUT.”
3. Set the UUT to measure dc current on the desired range.
4. Press the numeric keys and decimal point key to enter the desired current output
(maximum six numeric keys). For example, 234.567.
5. Press I to select the polarity of the current (default is +).
6. Press a multiplier key, if necessary. For example, press c.
7. Press A
8. The Control Display now shows the amplitude of your entry. For example,
234.567 mA (below).
234.567 mA
9. Press E. The calibrator clears your entry from the Control Display and copies
it into the Output Display (below is typical).
STBY
+ 234.567 mA
10. Press O to activate the calibrator output.
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