6-10
IM 2558A-01EN
• If you change the FREQUENCY METER MIN, MAX, main setting, or divider value, the value set
with the deviation dial will be cleared.
• If the preset is set to 0%, 2%, or 5% and you change the main setting or the denominator m of the
output divider, the deviation will be cleared. If you change the numerator n, the deviation is set
based on the preset setting.
• You cannot control this setting while a sweep is in progress.
• When an up sweep is in progress, the deviation is monitored and displayed in accordance with the
changes in the output value. Sweeping stops when the deviation reaches –20%. However, output is
not possible at 1000 Hz or higher.
• When an down sweep is in progress, the deviation is monitored and displayed in accordance with
the changes in the output value. Sweeping stops when the deviation r20%. However,
output is not possible at 20 Hz or lower.
• If the output range is exceeded, the display blinks.
Selectable range: –20.00% to +20.00%
You cannot set a deviation that would cause the frequency to be 1000 Hz or higher.
Resolution:
0.01%
Presets
When you change the numerator n of the output divider feature, the deviation is set to a value based
on the change in n and the preset.
When you calibrate a meter, you will change the numerator n of the output divider feature to move the
calibration point. A preset is used to take the meter error or overshoot into consideration so that when
you move the calibration point, the calibration point is not exceeded.
The sign of the deviation preset is positive when calibrating in increasing order (calibrating from the
smallest value) and negative when calibrating in decreasing order (calibrating from the largest value).
Value
5%: The deviation is set to +5% when the numerator n of the output divider feature increases
and –5% when it decreases.
2%: The deviation is set to +2% when the numerator n of the output divider feature increases
and –2% when it decreases.
0: The deviation is set to 0% when the numerator n of the output divider feature changes.
OFF: Presets are not used.
• When you change the preset setting, the deviation is set to the preset value.
• You cannot change the preset while a sweep is in progress.
• If you flip the PRESET switch down from the OFF position, the deviation will be set to 0%.
• The default preset is 0.
<<Command Mnemonic>>
:DEViation:PRESet
{<
Percentage
>|OFF}
:DEViation:VALue {<
Percentage
>|MINimum|MAXimum}
6.7 Finely Adjusting the Output (Deviation and Preset)
