Ceyear 4051 Series, User Manual

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5 Menu
5.2. Description of menu
348
[Auto
Align
On Off]
Control ON and OFF of the Auto Calibration. Under default setting, this function is ON. The signal/spectrum
analyzer will automatically judge whether to calibrate any parameters based on start-up time and internal
temperature change. When [Auto Align Man] is set as ON, automatic calibration will be taken 15 minutes
after start-up. If within 15 minutes, the instrument detects that the internal temperature change exceeds 10 °C,
the instrument will automatically stop current test and conduct auto calibration. After calibration, the
instrument will proceed measurement. For every change of 10 °C for the internal temperature, the instrument
takes one auto calibration. You can set the Auto Calibration as OFF to avoid interruption of normal
measurement by Auto Calibration. However, the measurement results may be affected if there is large internal
temperature change or the auto calibration fails to be taken for a long time.
Remote Command:
:calibration:AUTO OFF|ON
:calibration:AUTO?
Examples:
:CAL:AUTO OFF
[ Freq
Diagnose
▶
]
Display soft menus related to frequency diagnosis, including [LO Frequency], [Sample Oscillation Frequency]
and [Decimal Div Ratio].
Note: in multi-band sweep, the displayed frequency corresponds to the start frequency of the corresponding
band for which the oscillator sweeps.
This menu has no corresponding remote commands, and is mainly for local usage.
[LO Freq]
Display the start frequency of the first LO of the current band. This menu has no corresponding remote
commands, and is mainly for local usage.
[Sample
Surge Freq
]
Display the sample oscillator frequency to which the current band start frequency corresponds and the
compensation value of the sample loop bandwidth. This menu has no corresponding remote commands, and is
mainly for local usage.
[Decimal
Div Ratio
]
Display the Decimal Div Ratio to which the current band start frequency corresponds. This menu has no
corresponding remote commands, and is mainly for usage by local debugger.
[Preselector Auto Adjust]
With this menu, you can take auto calibration of the preselector center frequency to ensure accuracy and
consistency of instrument measurement. This menu has no corresponding remote commands, and is mainly
for local usage.