R3131 Spectrum Analyzer Operation Manual
2.2 Basic Operation
2-15
Apr 10/98
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Entering Data Using the Data Knob
The data knob is used to enter data in units of predefined display resolution. This is convenient
when making fine adjustments to data which has already been entered.
Example: To set the reference level to 0.5 dBm using the data knob, turn the knob clockwise.
This increases the reference level in increments of 0.1 dBm.
Continue to turn it until the indication in the active area is 0.5 dBm.
Turning the data knob counter clockwise decreases the reference level.
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ACTIVE OFF
Pressing
ACTIVE OFF turns off the active area and removes any information displayed. You
cannot enter data if the active area is off. To turn the active area on again, press any panel or soft
key.
(3)
Menu structure
You can access the following submenu by pressing either "1/2_more" or the key.
In addition, there is another type of soft key which is used to toggle between two settings (ON/OFF,
AUTO/MNL etc.). For these keys, the currently active setting is underlined.
Pressing MKR displays the Marker (1) menu as shown below.
Normal Marker
Delta Marker
Peak Menu
Sig Track ON/OFF
Sound
Marker Off
1/2_more
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Displaying submenus
Pressing the soft key displays a submenu as shown below.
Press Sound. The following Sound menu is displayed.
Sound AM/FM
Volume
MKR Pause Time
Squelch ON/OFF
Sound Off
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Switching between settings
To switch the currently active setting for soft keys such as AUTO/MNL, press the key. Pressing
the key again changes back the setting. The active setting is underlined.
Example: Press Squelch ON/OFF.
The squelch function is activated when ON is selected. When this function is active,
a squelch line is displayed and the current value for the squelch line is displayed in the
active area.
To remove the squelch line, press Squelch ON/OFF again to select OFF.
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RETURN
Used to go back to displaying the Marker (1) menu.
Press RETURN to return from the submenu to the original menu.
