pg. 41
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Ref Level Offset
It adds the offset value to the currently indicated reference level. The reference
level offset value can be changed only by using the numeric keypad. Changing the
Reference Level Offset value does not change the trace or the input attenuation
value. The reference level offset is used when there is a gain or loss of level
between the inputs of a device under test, and the analyzer. Accordingly, a signal
level measured by the analyzer can be thought to be the input level of the device
for changing external amplitude. After the reference level offset has been changed, the new
value will be indicated below the Ref Level Offset softkey on the screen. In order to remove offset,
please press Ref Level Offset, 0, dB. Also, if you press Preset, the reference level offset value will
be established as 0 dB.
AMPLITUDE >> Ref Level Offset
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Y Axis Units
It allows the user to change the amplitude unit of measure. You can change the
amplitude unit by selecting dBm, dBmV, dBμV, Volts or Watts.
AMPLITUDE >> Y Axis Units
5-2. BW/Avg
It activates the resolution bandwidth function, and sets the bandwidth function and the trace
average function.
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Resolution BW Auto Man
The 3 dB resolution bandwidth of the analyzer can be changed from 1 kHz to 3 MHz
in 1. 3. 10. sequence by using the scroll knob or the step keys. Decreasing the Video
Bandwidth increases the Sweep time in order to maintain the amplitude calibration .
Also, the resolution bandwidth is connected to a span. When the span decreases,
the resolution band will also decrease. If the resolution bandwidth is changed, the
video band will be changed for keeping the ratio of VBW/RBW when in automatic
connection mode. When it is not connected, “#” mark will appear beside the Res BW
on a display. If you intend to connect the resolution bandwidth again, please press
Resolution BW(Auto).
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