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SECTION 2
Getting Started
Example 4: Programming
the DC Offset
The OFFSET key allows you to set the DC or average level
of the output waveform,
as in the following
example:
sweep parameters, while the SWEEP OPR keys control
sweep operation.
Perform
the steps below to demon-
strate basic sweep operation:
1. Press OFFSET, and note that the instrument
displays
the current offset value and allowed range.
2. Either key in the desired offset, or use the MODIFY
knob and cursor keys to change the value.
3. Press DSPL to return to normal display.
Example 5: Selecting the Operating
Mode
The Model 3930A can be operated in continuous,
burst,
or gate modes. The operating mode can be set with the
MODE key as in the following
example:
1. Press MODE, and note that the instrument
displays
the current mode and available modes (continuous,
burst, and gate).
2. Press the number
of the desired mode (or rotate
MODIFY
to choose the desired operating mode).
3. Press DSPL to return to normal display.
Example 6: Controlling
Sweep Operation
The Model 3930A can be used to sweep across a desired
frequency range. The SWEEP keys allow you to program
Press START FREQ. and key in or use MODIFY to set
the sweep start frequency. For example, press 1 kHz
to program a 1kHz start frequency.
Press STOP FREQ. and set the sweep stop frequency
as desired. For example, to program a 1OkHz stop
frequency, press 10 kHz.
Press CTR and SPAN to view the center and span
frequencies.
With 1kHz and IOkHz start and stop
frequencies, the center and span frequencies will be
5.5kHz and 9kHz respectively.
NOTE: If you change
the center or span frequencies, the start and stop fre-
quencies willbe automatically
changed accordiigly.
Press SWEEP FCTN, and choose the type of sweep.
For example, press 2 to select a linear, ascending
sweep type.
Press SWEEP TIME, and program the sweep time as
required. For example, press 5 set to program a five-
second sweep time.
To generate a single sweep, press SINGL START.
The unit will generate one sweep based on selected
sweep parameters.
To generate continuous
sweeps, press SHIFT START
CONT. The Model 3930A will generate sweeps con-
tinuously
based on selected sweep parameters.
Press SWEEP OFF to stop a sweep.
2-6
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