Radio Test Instruments
Subject to Export Control, see Cover Page for details.
7-3
Field/Soft Key Definitions
Reference Level
The Reference Level is the top value on the display grid. Power levels can be measured at any
point on the trace in conjunction with the Scaling dB/div
setting. The Reference Level can be set
to any value within the specified range. The Reference Level is set by:
● Using the [Expand] and [Contract] Soft Keys to make step changes.
● Selecting the data field and using the Rotary Control Knob
to adjust the level.
● Selecting the data field and using the Data Entry Input Keys
to enter specific level.
Scaling dB/div
The Scaling drop-down menu selects from a range of 1, 2, 5, or 10. The scaling value (dB/div)
can then be increased or decreased using the [Expand] or [Contract] Soft Keys.
RF In (Source)
Selects the RF In connector (T/R Connector or ANT (Antenna) Connector).
RBW (Resolution Bandwidth) Toggle Button
Selects RBW bandwidth mode of operation. When Auto is selected, RBW is system defined to a
value appropriate to the signal type being displayed. When Manual is selected, a drop-down
menu becomes accessible which allows user to select from three defined bandwidth settings.
This toggle button is linked to the [Res BW] (Resolution Bandwidth) Soft Key
which can also be
used to define the RBW setting which functions in the same manner.
VBW (Video Bandwidth) Toggle Button
Selects VBW bandwidth mode of operation. When Auto is selected, VBW is system defined to a
value appropriate to the signal type being displayed. When Manual is selected, a drop-down
menu becomes accessible which allows user to select from a list of defined bandwidth settings.
This toggle button is linked to the [Vid BW] (Video Bandwidth) Soft Key
which can also be used
to define the VBW setting which functions in the same manner.
Sweep Toggle Button
Selects Sweep Time mode of operation. When Auto is selected, the Sweep Time is system
defined to a value appropriate to the signal type being displayed. When Manual is selected, a
drop-down menu becomes accessible which allows user to select from a list of defined Sweep
Time settings. This toggle button is linked to the [Sweep Time] Soft Key
which can also be used
to define the Sweep Time setting which functions in the same manner.
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