YOKOGAWA FG420, Руководство пользователя

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58 IM FG410-01EN
4. BASIC OPERATION
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
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
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.
Range processing
choice list