Ceyear 4051 Series, User Manual

Page: 46 / 751

3 Introduction to Use
3.2 Front Panel & Rear Panel
32
3.2.1.8 Knob and arrow keys
1) Knob function:
 When entering numbers, step up (clockwise) or down (anticlockwise) the instrument
parameters as specified;
 To move the selection bar in the Focus area (such as list);

To move markers or limit lines on the screen;

If a scroll bar is selected, to vertically move such scroll bar;

When pressed, it has the same function with Enter key.
2)
Up/down key function
 To increase or decrease instrument parameters in the number edit dialog;

To roll up and down the items in the list;
 To vertically move the selection bar in the table;

To move the scroll bar in windows or dialogs with the vertical scroll bar.
3) Left/right key function

To move the cursor in the alphanumeric character edit dialog;

To roll up and down the items in the list;

To horizontally move the selection bar in the table;
 To move the scroll bar in windows or dialogs with the horizontal scroll bar.
3.2.1.9 Trigger input
BNC female, for external trigger signal input on the front panel with input voltage range of [-5V, +5V].
3.2.1.10 Audio input
BNC female, for test and analysis of audio signal input with input frequency range of [-5V, +5V].
3.2.1.11 Noise source drive
Reserved for function extension.
3.2.1.12 External mixing interface
Available when relevant option is selected.
LO output interface: 2.4 mm connector;
IF input interface: 3.5 mm SMA female connector.
3.2.1.13 RF input
For subsequent analysis by connecting the tested device via the cable to RF input interface.
Caution
The input interface should not be overloaded. Refer to the specification manual for maximum permissible
value. DC input voltage of no more than 50 V is allowed for AC coupling. No DC voltage is allowed at the
input interface for DC coupling. The internal mixer of the instrument will be damaged if the above conditions
are not met.