Setting The Reference Level (Ref. Level); Setting The Attenuator Value (Attenuator); Selecting The Rf Input (Input); Lowering/Rising The Level By 5 Db (+5 Db / -5 Db) - L3Harris Narda SignalShark User Manual

the setting of the input attenuator (Attenuator, Atten). The input attenuator can be
matched ideally to the measurement signal by means of its fine adjustment in steps of
0.5 dB. At the highest reference level setting, Atten = 2 dB; at the most sensitive
reference level, Atten = 0 dB.
It is possible to decouple the reference level and the input attenuator indirectly using the
Y-Scale Ref parameter in the Display menu.

Setting the reference level (Ref. Level)

You selected the desired view.
1. Tap the Ref. Level button.
The settings dialog opens.
2. Enter the required value and tap the unit button.
The setting is accepted immediately and the dialog is closed.
Or use the Rotary knob to change the value.

Setting the attenuator value (Attenuator)

You selected the desired view.
1. Tap the Attenuator button.
The settings dialog opens.
2. Enter the required value and tap the unit button.
The setting is accepted immediately and the dialog is closed.
Or use the Rotary knob to change the value.

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.

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
Bearing View
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