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SECTION 3
Operation
types, the offset range is restricted to the values
given
in the specifications
(Appendix
B and
paragraph 3.5.7). All specified offset ranges are
for no-load (open-circuit)
conditions.
FCTN (Function: waveformi
[MODIFY]
This
key allows
you to choose the output
waveform.
Available
waveforms
include:
DC,
SIN (sine wave),
2/
(triangular
wave),
L
(square wave), n
(ascending sawtooth
wave),
and\
(descending sawtooth wav4.
When the output range mode is AUTO, and the
waveform
function is changed, the amplitude
of
the new waveform
is automatically
changed to
p-p units, unless the new waveform
is DC. For
details, refer to paragraph 3.5.8 in Section 3.
MODE (Oscillation mode)
[MODIFY]
The MODE key programs the oscillation
mode
setting.
Available
oscillation
modes include:
CONT (continuous
oscillation),
BRST (burst os-
cillation),
and GATE (gate oscillation).
Refer to
paragraph 3.5.9 for details in Section 3.
DATA
(iVumeric keys for parameter ent$
The DATA key set consists of numeric keys for
entering a value and ENTER (units) keys for set-
ting the units of the entered value. The. (decimal
point) key and the +/- (sign inversion)
key do
not affect parameters for which
they have no
function.
Parameters that are selected with one numeric
character, such as waveform
function and oscil-
lation mode, do not require that any ENTER key
be pressed. Such parameters are set simply by
entering one numeric
character (or by rotating
the MODIFY knob as required).
For other parameters, enter the required
value
with the numeric keys, then press the appropri-
ate ENTER units key. If you enter the incorrect
value, press the RUB OUT (delete) key. RUB
OUT deletes the numeric
character or decimal
point from the rightmost
position. To delete the
entire entered value and return the display to the
current value, press the original function
key to
enable parameter entry for that function.
For frequency and amplitude
where parameters
can be entered in different
types of units, select
the appropriate
units key from the ENTER keys
to complete entry of the value. Use the deg, %, or
cycle keys to enter phase, duty cycle, or burst cy-
cles respectively.
The units keys also have a units-conversion
function.
This feature is available for unit con-
versions such as frequency-to-period
conversion
for frequency,
as well as amplitude
p-p/m/
dBV conversions. When the units key is pressed
with the current setting displayed,
the display
will
be changed to reflect the newly-selected
units; note, however, that the actual output re-
mains unchanged.
0 (Outpui range mode.,
~S~l,
[MODIF
Pressing SHIFI 0 enables output range mode se-
lection and allows you to choose between auto-
matic (AUTO) and fixed (FXD). For complete de-
tails on output range modes, refer to paragraph
3.5.12 in Section 3.
MODIFY
(Modifij
operation keys)
In addition
to using the numeric keys, you can
set any parameter except the GPIB address, de-
limiter, and memory number by using the MOD-
IFY knob. The MODIFY
knob is operational
when the Model 3930A is in the appropriate
pa-
rameter-entry
mode, and the unit displays
the
current parameter value.
MODIFY
(Modify knob)
When the step size is +1 or ti, you can select the
digit to increase or decrease by 1 or by 5 by plac-
ing the cursor under the appropriate
digit (use4
or b ) and turning the MODIFY knob to the right
or left.
When the step size is x+2, you can divide the se-
lected parameter by 2 by turning
knob counter-
clockwise,
or multiply
the parameter
by 2 by
turning
the knob clockwise. Similarly,
when the
step size is x+10, you can divide or multiply
the
parameter by 10 by rotating
the knob counter-
clockwise
or clockwise
respectively.
Note that
3-7
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