Ceyear 4992A, User Manual

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Chapter IV Operation Guidance
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RF Source 1, or click [RF Source 1] in the right menu to control the ON/OFF state of RF
Source 1. If RF Source 1 is ON, the font in the window will be displayed in green, and the
current status of RF Source 1 will be displayed in the [RF Source 1OFF ON] soft key of
the right menu.

Set the step: click the [Frequency step] soft key of the right menu of the window to enter
the menu of next level, and set the frequency step and amplitude step. After step setting,
select the output frequency or output power. If the knob is rotated or [↑] or [↓] is pressed,
the current frequency or power will change according to the set step value.
2. Modulation source

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hard key or pressing the [Measurement] hard key and setting the instrument menu.
When the RF source window is opened, the modulation source will be opened
accordingly. The operation window is shown in Fig. 4-2.
Fig. 4-2 RF Source and Modulation Source Window

Call the menu: click the touch screen, select the modulation source window as the
current active window, and the modulation source window menu will be displayed in the
right side of the window.

Set the carrier parameter: refer to the requirements of “RF Source 1”. Note that the
modulation wave must be loaded by RF Source 1.
 Set the modulation source: click “Modulation Source” in the window and select the type
of the modulation source, or press the [Modulation Source] soft key in the right menu of
the window and select the type of the modulation source. The modulation source is
divided into three types: internal audio, external audio and external MIC.
 Set the modulation type: the default modulation type is “No Modulation”. You can
select the modulation type by clicking “No Modulation” in the window and selecting the
modulation type in the drop-down menu or clicking the [Amplitude Modulation AM] or
[Frequency Modulation FM] soft key in the right menu of the window and selecting the
modulation type. Note that the modulation type and modulation rate are only for the
internal audio signal. For the external audio signal, the above parameters should be set
in the external modulation source.

External audio modulation: for the external audio signal, click the corresponding
impedance on the right side of “External Audio Input” in the window, and select the
external audio impedance in the drop-down menu, or click the [External Audio
Impedance] soft key on the right side of the window to enter the menu of next level and
select the required impedance value. Note that the [External Audio Impedance] soft key