Ceyear 4041 Series, User Manual

Page: 117 / 203

Chapter VII AM-FM-PM Analyzer Mode (optional)
105
7.3.2 Span menu
Span
Span
Last span
< Back
·[Span]: Press
【
Span
】
→[Span] to activate the span submenu. You can change it by
using the numeric keys and selecting a frequency unit, or by using
【 ↑ 】 【 ↓ 】
keys and
the knob.
·[Special Attention]: Change the span by using
【
↑
】 【
↓
】
keys and the knob based
on the steps of 1-2-5.
·[Last Span]: Press
【
Span
】 →[Last Span] to restore the span to that last set.
·[Back]: Press
【
Span
】
→[Back] to return to the
【
Freq
】
menu.
7.3.3 Amplitude menu
Ref level
0.0dBm
Amplitude
Ref Position
Atten
Auto Man
Scale/Div
10.0dB
Pre Amp
Off On
·[Ref Level]: Press
【
Ampt
】 →[Ref Level] and select [dBm], [-dBm], [mV] or [uV] in
the frequency unit menu by using the numeric keys on the front panel, or
【
↑
】 【
↓
】
keys and the knob.
·[Special Attention]: The step is 10 dB when the
【
↑
】 【
↓
】
keys and the knob are
used.
·[Ref Position]: Press
【
Ampt
】
→[Ref Position] and change it by using the numeric
keys or by using
【 ↑ 】 【 ↓ 】
keys and the knob.
·[Atten Auto Man]: Press
【
Ampt
】
→[Atten Auto Man] and switch the attenuator auto
or manual mode in the menu by using the numeric keys or by using
【 ↑ 】 【 ↓ 】
keys
and the knob.
·[Special Attention]: The setting range of the attenuation value is between 0 dB
and +60 dB, and the step is 10 dB.
·[Scale/Div]: Press
【
Ampt
】 →[Scale/Div] and set it between 0.1 dB and 20 dB by
using the numeric keys or by using
【
↑
】 【
↓
】
keys and the knob.
·[Pre Amp Off On]: Press
【
Ampt
】
to control on or off state of the preamplifier. This
function is activated when the reference level is less than -40 dBm.
7.3.4 Bandwidth menu
IFBW
BW
Average
Off On
·[IFBW]: Press
【
BW
】 →[IFBW] to select the corresponding frequency unit [GHz],
[MHz], [kHz] or [Hz] via the numeric keys on the front panel, or set it by using
【
↑
】
【 ↓ 】
keys and the knob.
·[Special Attention]: The intermediate frequency bandwidth shall be larger than
the width of the modulated signal so that the signal can be accurately
demodulated, and the bandwidth of the modulated signal can be observed in the
radio frequency spectrum. In addition, excessive intermediate frequency
bandwidth will introduce noise and influence the accuracy of parameter
measurement. The intermediate frequency bandwidth is between 10 kHz and 300
kHz with the step change of 1-3-10.