Ceyear 4051 Series, User Manual

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5 Menu
5.2. Description of menu
420
[Freq Info Disp ON OFF]
● Menu description: to select whether to display the status area frequency information.
●
Key path: 【 Display 】 , [Display Config ▶ ], [Freq Info Disp ON OFF] on the front panel.
● Remote Command:
:display:annotation:frequency OFF|ON|0|1
:display:annotation:frequency?
● Examples:
:DISP:ANN:FREQ OFF
:DISP:ANN:FREQ?
5.2.2.12 Input Output
This More pops up the More related to external input and output interfaces of the signal/spectrum and the soft
More includes [Freq Ref Int Ext], [Input Couple AC DC], [Input Port RF
CAL
], [Cal Port
▶
], [HF IF Output
ON/OFF], [IF Output
▶
], [Log Detector Output ON/OFF], [Ext Mixer…], [Input Impedance 50Ω/75Ω].
[Freq Ref In Ext]
● Menu description: to select internal or external frequency reference. The external frequency reference
should be 10 MHz±100Hz and amplitude 0dBm (Limit range: -2dBm~+10dBm). The external frequency
reference should be input through the ―10 MHz Reference Input‖ interface on the rear panel. In selecting
external reference, the information prompt area will display ―Reference: External‖.
● Key path: 【 Input/Output 】 , [Freq Ref Int Ext] on the front panel.
● Status saved: saved in the instrument status.
●
Factory preset: internal.
● Remote Command:
[:sense]:roscillator:source internal|external
[:sense]:roscillator:source?
● Examples:
:ROSC:SOUR INT
:ROSC:SOUR?
[Input Couple AC DC]
● Menu description: to select the coupling method of the input interface of the signal/spectrum analyzer
as DC or AC coupling. The DC coupling is useful for measuring input signal less than 10 MHz. However,
the external input DC signal may damage the instrument. AC coupling prevents external DC signal from
entering the instrument, and is suitable for measuring RF signal larger than 10 MHz.
● Key path:
【
Input/Output
】
, [Input Couple AC DC] on the front panel.
● Status saved: saved in the instrument status.
● Factory preset: DC.
●
Remote Command:
:input:coupling AC|DC