ADInstruments DSA2016, Руководство пользователя

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Direction Key Step 5 dB
Scale/Div
Set the logarithmic units per vertical grid division on the display. This function is only available
when the scale type is set to “Log”.
Key Points:
• By changing the scale, the amplitude range available is adjusted.
Scale Type
Set the scale type of Y-axis to Lin or Log, the default is Log. Key Points:
• In Log scale type: the Y-axis denotes the logarithmic coordinate, the value shown at the top
of the grid is the reference level and each grid represents the scale value. The unit of Y-axis
will automatically switch to the default “dBm” in Log scale type when the scale type is
changed from Lin to Log.
• In Lin scale type: the Y-axis denotes the linear coordinate, the values shown at the top of the
grid and the bottom of the grid are the reference level and 0 V respectively. Each grid
represents 10% of the reference level and the Scale/Div is invalid. The unit of Y-axis will
automatically switch to the default “Volts” in Lin scale type when the scale type is changed
from Log to Lin.
• The scale type does not affect the unit of Y-axis.
Units
Set the unit of the Y-axis to dBm, dBmV, dBuV, Volts or Watts. Wherein, dBm, dBmV, and dBuV
are for Log scale; Volts and Watts are for Linear scale. The default is dBm.
Key Points:
The conversion relationships between units:
=
=
=
=
Wherein,
R
denotes the reference resistance.
Ref Offset
Assign an offset to the reference level to compensate for gains or losses generated between the
device under measurement and the analyzer.
Key Points:
The change of this value changes both the reference level readout and the amplitude readout of
the marker, but does not impact the position of the curve on the screen.
You can modify this parameter using the numeric keys. For more details, please refer to
“
Parameter Setting ”.
dBm
2
1
0.001
10log
Volts
R W
´
æ ö
ç ÷
è ø
dBuV
6
10
20log
1
Volts
uV
´ æ ö
ç ÷
è ø
dBmV
3
10
20log
1
Volts
mV
´ æ ö
ç ÷
è ø
Watts
2
Volts
R