YOKOGAWA FG420, User Manual

Page: 66 / 180

52 IM FG410-01EN
4. BASIC OPERATION
4.4.7 Setting the amplitude
a) Setting method
1.
Press the
AMPTD
AMPTD shortcut key
to open the amplitude input field.
Alternatively, select the [Amptd] field
and then press the
ENTER
ENTER key
to open the amplitude input field.
Even if there are several setting
screens, the [Amptd] field is always
displayed on the first page. If [High] is
displayed in the [Amptd] field and the
high level instead of the amplitude is
displayed, press the
AMPTD
AMPTD key
once more to switch to the amplitude
display.
2.
Select the digit to be changed with the left/right arrow keys, and increment/
decrement the value with the up/down arrow keys or the modify knob. The
change is instantly reflected to the output.
Alternatively, enter a numeric value using the 0 ... 9 numeric keypad. Then press
the
ENTER
ENTER key or one of the unit keys (soft keys) to set the input value and
reflect it to the output.
b) Changing the unit (Vp-p, Vpk, Vrms, dBV, dBm, user-defined unit)
1.
When the amplitude input field is
open, press the [Unit] soft key and
move the cursor to the unit position on
the right end.
2.
The unit can be changed with the
up/down arrow keys or the
modify knob. (Units that cannot be
used are not displayed.) Even if the
display unit is changed, the actual
output value remains unchanged.
c) The units that can be used differ according to the waveform
Vp-p, Vpk, Vrms, dBV, dBm, and user-defined units can be used as the amplitude units. However, the
applicable waveforms are limited as follows (not applicable to DC).
Unit Applicable Waveform
Vp-p Standard waveform and arbitrary waveform with amplitude range of ±FS
Vpk Standard waveform and arbitrary waveform with amplitude range of 0/+FS,
-
FS/0
Vrms Sine wave and noise
dBV Sine wave and noise
1 Vrms = 0 dBV
dBm Sine wave and noise
Voltage of 1 mW set as 0 dBm for the specified load impedance (

p.59 )
Example: In the case of a load impedance setting of 50
Ω
, 0 dBm = 223.6 mVrms/50
Ω
.
Not usable when the load impedance setting is High-Z.
User-defined
unit
All waveforms.
For details on user-defined waveforms,

“7. USING USER-DEFINED UNITS”
in
the Application Instruction Manual.
Amplitude input
field
Place cursor on
unit