166 Keysight EXG and MXG X-Series Signal Generators User’s GuideAnalog Modulation (Option UNT)Configuring the LF Output (Option 303)DC selects a DC voltage level as the LF output BNC source.Configuring the LF Output with an Internal Modulation SourceIn this example, the internal FM is the LF output source. See Figure 6-3 on page 167.Configuring the Internal Modulation as the LF Output Source1. Press Preset.2. Press the FM/ΦM hardkey.3. Press FM Dev > 75 > kHz.4. Press More > Setup FM Source > FM Rate > 10 > kHz.5. Press Return > Return > FM Off On.You have set up the FM signal with a rate of 10 kHz and 75 kHz of deviation. The FM annunciator isactivated indicating that you have enabled frequency modulation.Configuring the Low Frequency Output1. Press the LF Out hardkey.2. Press LF Out Amplitude > 3 > V.3. Press LF Out Off On.You have configured the LF output signal for a 3 volt sine wave (default wave form) output which isfrequency modulated using the Int Monitor source selection (default source).The LF Out Off On softkey controls the operating state of the LF output. However when the LFoutput source selection is Int Monitor, you have three ways of controlling the output. You canuse the modulation source (AM, FM, or ΦM) on/off key, the LF output on/off key, or the ModOn/Off softkey.The RF On/Off hardkey does not apply to the LF OUTPUT connector.Internal modulation (Int Monitor) is the default LF output source.
