Spectrogram View
97
Setting the attenuator value (Attenuator)
You selected the desired view.
Attn
is selected as entry mode.
1.
Tap the
Attenuator
button.
The settings menu opens.
2.
Enter the required value and tap the unit button.
The settings is accepted immediately and the dropdown list is closed.
Or use the
Rotary knob
to change the value.
Settings in the context menu
You selected the desired view.
1.
Long tap the
Ref. Level
or
Attenuator
button.
The context menu opens.
2.
Here you can do the following:
Selecting the RF input (Input)
To select the RF input:
1.
Tap the
Input
button and enter an input.
2.
Tap the
OK
button to accept the setting.
The input window is closed.
3.
Press the
Esc
key to close the context menu.
Setting the entry mode (Entry Mode)
To select the Entry Mode:
1.
Tap the
Entry Mode
button to select the mode:
–
RL
: Reference Level
–
Attn
: Attenuation
2.
Press the
Esc
key to close the context menu.
Lowering/rising the level by 5 dB (+5 dB / -5 dB)
1.
Tap the
+5 dB
or
-5 dB
button.
2.
Press the
Esc
key to close the context menu.
About the +5 dB / -5 dB buttons:
You can use the
+5 dB
/
-5 dB
buttons to check for over modulation and to rapidly change
the values in 5 dB steps. The buttons are only enabled if the change is possible in the
selected direction. The Y scale is fixed as soon as you make a change using the
+5 dB
/
-
5 dB
buttons so that changes in level are easier to see.
As well as controlling overload, the
+5 dB
/
-5 dB
offset can also be used to distinguish an
actual measurement signal from an intrinsic spurious signal (Spurious). Regardless of the
reference level setting, the measurement signal will display the same level value until
compression occurs from overloading. In contrast, the displayed value of an intrinsic
spurious signal will change each time the reference level is changed (RL +5 dB: displayed
value increases by +5 dB as well).
