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SECTION 3
Operation
Er FRDT07
You tried to set the Model 3933A for a square wave
with variable duty cycle while the Model 3930A was
sweeping at, or set for, a frequency exceeding the
square wave limit of 1OOkHz.
The error is displayed and then the display indicates
main parameters.
The Model 3933A initiated a sweep exceeding the
Model 3930A limit of lOOkHz, or the Model 3933A was
making a square wave of variable duty cycle, while the
Model 3930A was set to a frequency value higher than
1ookHz.
Under these conditions, the duty cycle changes to
fixed 50% and, following the error display, the duty
cycle display appears.
You tried to turn on the Model 3933A, and set it for a
variable duty cycle square wave, while the Model
3930A was set for, or sweeping at, a frequency exceed-
ing the square wave limit of lOOkl!Iz.
In this case, the previous settings in memory are modi-
fied to produce a fixed 50% setting. Following the er-
ror display, the main parameters are displayed.
When the Model 3930A is set beyond the 1OOkHz
square wave limit, or it is sweeping beyond this limit,
you tried to set a variable duty cycle by recalling a
memory location containing that setting.
Under these conditions, the recalled setting for square
wave is changed to fixed 50%. Following the display of
the error message, the main display is turned on. The
actual data in that memory location is not altered.
Er SWPOS
l
You attempted to perform a sweep with a range of
zero degrees.
Er RNGE09
l
You attempted to specify a value outside the predeter-
mined range, resulting in a condition other than errors
02 through 08.
Examples:
You entered a value of 6 during waveform selection.
You attempted to set the sweep time to 3msec.
Er CNVTlO
o The result of the units conversion sequence is outside
the allowed range of the given value.
Example:
You attempted to convert to an rms value when the
waveform is set to sine wave with an amplitude of
03OmVp-p. The Model 3933A automatically converts
this to O.lOmVrms, which is below the lower limit of
O.llmVrms.
Er MEMO11
A power-on error was found in the backup memory
for one or more parameter settings. If this error occurs,
preset values will be placed into effect, and you should
make any new value settings using the front panel
controls.
An error was found in the contents of the memory
while recalling parameters. Parameter settings will
not be changed, and the Model 3933A will return to the
prompt for the memory number to recall.
Er NODT12
The Model 3933A (slave unit) has detected a problem
between the Model 3930A (master unit) and itself, or a
problem exists somewhere in the chain of master and
slave units. A slave unit will not operate if the master
unit is not powered-up or if there is a break in the com-
munications link (Digital In/Out
cables) from one
slave to another, or between the master unit and a
slave unit.
If the slave unit detects that the power of the master
unit is off, the signal output will be turned off, and the
error display will appear. The Model 3933A slave unit
will not recognize further parameter settings until the
power of the master unit is turned on or the communi-
cations error condition is corrected.
3.4.4
Amplitude Units Conversion
Note that internal settings remain unchanged when the
units conversion is performed. The Model 3933A auto-
matically displays the result of units conversion as the ex-
isting specified value, and you can modify the value us-
ing the converted units, if desired.
3-22
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