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4.
BASIC OPERATION
IM FG410-01EN
4.4.11 How to use auto range/range hold for the output voltage
Since auto range is set as part of the initial settings, the optimum range is automatically
selected according to the amplitude and DC offset (including settings with high level and
low level). A transient voltage is generated when the range is changed, but control is
performed so that overvoltage does not result.
If the transient voltage generated as the result of range switching is not desirable, the range
can be fixed. However, reducing the amplitude while the range is fixed lowers the amplitude
accuracy and waveform quality.
a) Setting method
1.
Select the range icon on the right of the
amplitude display to display the current
range under that icon. The current range
is displayed as a combination of maximum
output voltage Vp-p and the amplitude
attenuator.
Press the
ENTER key to open the
range processing choice list.
2.
Auto range is selected when [Auto] is
selected from the choice list, and when
[Hold] is selected, the range is fixed to the
range at that time. The respective range
icons are displayed as “Auto” and “Hold”.
Select the desired range processing and
then press the
ENTER key.
b) Maximum values of amplitude and DC offset when range is fixed
When the range is fixed, the maximum values of the amplitude and DC offset, and the
external addition gain are as listed in the following table.
Range (Maximum
Output Voltage Vp-p,
Amplitude
Attenuator)
Maximum Value of
Amplitude
(Load Open Value)
Maximum Value of
DC Offset
(Load Open Value)
Maximum Value of
AC+DC
(Load Open Value)
External Addition
Gain
(±1 V Rating)
20 V, 0 dB
20 Vp-p
±10 V
±10 V
×10 or Off
20 V,
−
10 dB
6.325 Vp-p
±10 V
±10 V
×10 or Off
20 V,
−
20 dB
2 Vp-p
±10 V
±10 V
×10 or Off
20 V,
−
30 dB
0.6325 Vp-p
±10 V
±10 V
×10 or Off
4 V, 0 dB
4 Vp-p
±2 V
±2 V
×2 or Off
4 V,
−
10 dB
1.265 Vp-p
±2 V
±2 V
×2 or Off
4 V,
−
20 dB
0.4 Vp-p
±2 V
±2 V
×2 or Off
4 V,
−
30 dB
0.1265 Vp-p
±2 V
±2 V
×2 or Off
Select the range
icon and then
press the ENTER
key
The current
range is
displayed when
the range icon is
selected
ENTER
Range
processing
choice list
ENTER
