Ceyear 4051 Series, User Manual

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4. Operating Instruction
4.2 Advanced operation guide
165
 Press the soft menu [Limit Line ▶ ], pop up setup sub-menu of limit line function.
 Press [More 1/2
▶
], [Test Limit Line On / Off], turn on limit line test switch.
Step 2. To edit limit line:
 Press
【
Meas Setup
】
, [Limit Line
▶
], [Edit
▶
], pop up sub-menu of limit line editing, in this case, edit
window of the limit line appear, as shown in Fig. 4.84.
Fig. 4.84 Edit Window of Limit Line

Press the soft menu [Insert Point], and it will automatically generate a new limit line point. The default
frequency of the first point is current start frequency, with amplitude of 0 dBm. After the first point, each
new point inserted will be created with 1/100 of current span increased each time based on the above (if
the unit on X-axis of limit line is time, then the points inserted will be created with 1/100 of current
sweep time increased each time based on the above), with default amplitude always as 0 dBm.
 Arrow keys can be used to further edit the generated point of limit line list. Press the soft menu
【 Frequency 】 or [Amplitude], and it will modify the frequency or amplitude value of the current edit
point.
 Limit line point can be deleted by soft menu [Delete Point].
 [Copy
From
Limit
▶
] function can copy the selected limit line to the current limit line. Such as, pressing
soft menu [Copy
From
Limit ▶ ], [Limit Line 2] can copy all points information of limit line 2 to the
current limit line.
Note: This will overwrite the currently edited data of limit line, please be careful!
 [
Build From
Trace
▶
] function will generates a default limit lines based on the currently selected trace
data, the default test results of the limit line generated is pass.
Step 3. Save and call limit lines:
 Press [Save Limit Line…] Soft menu, pop up Save As dialog box, select save path and save file name,
click to save, and it will save the edit data of the current limit line, file name suffixed with ―.lim‖, as
shown in Fig. 4.85.