![](/images/backgrounds/286910/hp-e4401b-users-manual-54883330x1.png)
Front and Rear Panel Features
Front Panel Overview
2.1.2 Display Annotations
Table | Screen Annotation |
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Item | Description | Associated Function Key | |
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1a | Detector mode | Detector | |
2 | Reference level | Ref Level | |
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3 | Active function block | Refer to the description of the activated | |
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4 | Screen title |
| Change Title |
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5 | Time and date display | Time/Date On Off | |
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6a,b | RF attenuation | Attenuation Auto Man | |
7 | Marker frequency | Marker or | |
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| Marker Count On Off |
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8 | Marker amplitude | Marker | |
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30 | Chapter 2 |