94Making Time-Gated MeasurementsGenerating a Pulsed-RF FM SignalGenerating a Pulsed-RF FM SignalWhen performing these measurements you can use a digitizing oscillascope or yourKeysight X-Series Signal Analyzer (using Gate View) to set up the gated signal.Refer back to these first three steps to set up the pulse signal, the pulsed-RF FMsignal and the oscilloscope settings when performing the gated LO procedure(page 100), the gated video procedure (page 104) and gated FFT procedure(page 108).For an instrument block diagram and instrument connections see “Connecting theInstruments to Make Time-Gated Measurements” on page 99.Signal source setupStep 1. Set up the pulse signal with a period of 5 ms and a width of 4 ms:There are many ways to create a pulse signal. This example demonstrates how tocreate a pulse signal using a pulse generator or by using the internal functiongenerator in the ESG.See Table 8-1 if you are using a pulse generator or Table 8-2 ifyou are using a second ESG. Select either the pulse generator or a second ESG tocreate the pulse signal.Table 8-1 81100 Family Pulse Generator SettingsPeriod 5 ms (or pulse frequency equal to 200 Hz)Pulse width 4 msHigh output level 2.5 VWaveform pulseLow output level -2.5 VDelay 0 or minimumTable 8-2 ESG #2 Internal Function Generator (LF OUT) SettingsLF Out Source FuncGenLF Out Waveform PulseLF Out Period 5 msLF Out Width (pulsewidth)4 msLF Out Amplitude 2.5 VpLF Out OnRF On/Off OffMod On/Off On
