Ceyear 4051 Series, User Manual

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5 Menu
5.2. Description of menu
590
● More description: to select the Y Axis unit from [dBm], [dBmV], [dBmA], [W], [V], [A], [dBμV] and
[dBμA]. The instrument will automatically calculate the trace data and marker readout based on the Y
axis unit.
●
Key path: 【 Ampld/YScale 】 , [More 1/2 ▶ ], [Y Axis Unit ▶ ] on the front panel.
●
Status saved: saved in the instrument status.
●
Factory preset: dBm.
:UNIT:SEMask:POWer DBM|DBMV|DBMA|V|W|A|DBUV|DBUA
:UNIT:SEMask:POWer?
[Ref Level Offset ]
●
Menu description: to introduce offset for all amplitude readout (e.g, reference level and marker
amplitude). It will not change the trace position on the screen. This offset unit is dB and is not affected by
the scale and unit. Use number keys, stepping keys or knob to input the offset value.
● Key path:
【
Ampld/YScale
】
, [More 1/2
▶
],[Reference Level Offset] on the front panel.
● Status saved: saved in the instrument status.
● Factory preset : 0 dB.
● Setting range: Min.: -1000dB, Max.:1000dB.
●
Remote Command:
:DISPlay:SEMask:WINDow:TRACe:Y:RLEVel:OFFSet <rel_ampl>
:DISPlay:SEMask:WINDow:TRACe:Y:RLEVel:OFFSet?
● Examples:
:DISP:SEM:WIND:TRAC:Y:RLEV:OFFS 12
5.2.11.3 Span/X Scale
This key has no soft menu.
5.2.11.4 Bandwidth
Pop up the [Filter Type] More for selecting filter type.
[Filter Type]
● More description: comprising [Gaussian] and [Flattop]. In general, the signal/spectrum uses Gaussian
filter, i.e., use filter approximate to the Gaussian shape to complete filtering of Res BW. If the flat top
filter is used, the signal/spectrum analyzer adopts filter approximate to the rectangular shape to complete
filtering of resolution bandwidth. The response time of flat top filter is about 3 times of that of the
Gaussian filter. The sweep speed of the flat top filter is smaller than that of the Gaussian filter. The flat
top filter has better selectivity than the Gaussian filter and therefore is more capable of distinguishing two
signals with unequal amplitude.
● Key path:
【
BW
】
, [Filter Type] on the front panel.
● Status saved: saved in the instrument status.
●
Factory preset: Gaussian
● Remote Command:
:SEMask:BANDwidth:SHAPe GAUSsian|FLATtop