7-4
Wave Functions (6221 Only)
Model 6220/6221 Reference Manual
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Setting waveform parameters
Editing parameters
The AMPL and FREQ keys also function as left arrow and right arrow keys,
respectively, when editing a numeric value or scrolling through menu.
Examples:
•
Press FREQ while editing the 1’s digit on 001000.000 Hz line. Press FREQ
again while the 0 is flashing, and the cursor moves to the 0.1 place.
•
Press AMPL, and the 100’s place is flashing for Amplitude. Press AMPL to
edit the sign or FREQ to edit the 10’s place.
Amplitude and offset editing
The Model 6221 amplitude and offset menus are coupled and follow special rules for
editing. To change amplitude, press the AMPL key, use the arrow keys to select a
digit, and use the knob to change the value. The range up and down arrows are used
to change the amplitude range. Once you have selected an Amplitude range and
entered the desired value, go into the Offset menu (CONFIG->WAVE->OFFSET).
Note that the offset menu formatting will be the same as the last Amplitude range.
The offset menu formatting cannot be changed with the range arrows. It is locked to
be on the same range format as you had for setting the Amplitude. If you need more
flexibility, such as the ability to have 1
μ
A offset and 100mA source amplitude, use
remote operation.
The range formatting of the amplitude and offset is a convenience. It does not dic-
tate the actual range that will be used for waveform operation. The range used is
controlled by the RANGING menu (or SOUR:WAVE:RANGing command). Note
that if a previously set offset value is too high to fit in the offset menu after chang-
ing the Amplitude range, then the offset menu will show the limit value instead.
This is illustrated in the following example:
1.
Start by setting the Amplitude range to 100mA and an Amplitude value of
50mA.
2.
Go into CONFIG->WAVE->OFFSET, and set an offset of 10mA.
3.
Return to the Amplitude menu, and now select an amplitude of 100nA.
4.
When you return to the CONFIG->WAVE->OFFSET menu, the display will
s210 nA, the maximum allowed on this range.
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