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Fig.3.1 Baseband Config Dialog
NOTE
Instructions for Fix 4 and filters
If the data source is selected as Fix4, Fix4 Data is required, of which the range is 0000 (binary) -
1111 (binary), displayed and input (0-15) by decimal notation in the configuration dialog.
If the modulation type is selected as FSK (2FSK, 4FSK, 8FSK, 16FSK) or MSK, the filter shall be
selected as Gauss in order to achieve better output.
3.1.2 Simulation modulation and pulse modulation
3.1.2.1 Amplitude modulation(AM)
Please refer to the 2.3.2.2 Modulated signals of 2 Start Guide.
3.1.2.2 Frequency modulation(FM)
Example: To generate FM signals with LO frequency of 3.5GHz, amplitude of 0dBm,
modulation rate of 0.001MHz and FM offset of 1MHz.
Operation steps:
Step 1. Set RF output signal:
Set CW to 3.5GHz, power level to 0dBm and
【
RF ON/OFF
】
to ON.
Step 2. Open FM Config Dialog:
Press
【
FM/ФM
】
key or tap [Frequency Modulation] under [Simulation Modulation] on the
touchscreen, and the FM Config Dialog pops up in the operation interface (Fig.3.2). Or select
【
MOD ON/OFF
】
key to open the modulation configuration dialog and switch to the FM Config
Dialog.
Step 3. Set FM waveform:
Select [FM Config] in the frequency modulation dialog, rotate the knob clockwise (or
counterclockwise) to select FM Waveform combo box, press the knob to activate the option, and
press Up/Down button to select [Sinc]; or tap FM Waveform combo box on the touchscreen to select
[Sinc] option.
Step 4. Set FM source:
Select [FM Source] in the FM Config Dialog rotate the knob clockwise (or counterclockwise) and press the
knob to select [INT], or tap [INT] under the [FM Source] on the touchscreen.