Specifications

60 Chapter 8
Making Time-Gated Measurements
Generating a Pulsed-RF FM Signal
Making Time-Gated Measurements
Step 3. Set up the oscilloscope to view the trigger, gate and RF signals (see
Figure 8-1 for an example of the oscilloscope display):
Figure 8-1 Viewing the Gate Timing with an Oscilloscope
Figure 8-1 oscilloscope channels:
1. Channel 1 (left display, top trace) - the trigger signal.
2. Channel 2 (left display, bottom trace) - the gate signal (gate signal is
not be active until the gate is on in the spectrum analyzer).
3. Channel 3 (right display) - the RF output of the signal generator.
Table 8-4 Agilent Infiniium Oscilloscope with 3 or more input channels:
Instrument Connections
Timebase 1 ms/div
Channel 1 ON, 2 V/div, OFFSET = 2 V, DC coupled, 1 M
Ω input,
connect to the pulse signal (ESG LF OUTPUT or pulse
generator OUTPUT). Adjust channel 1 settings as
necessary.
Channel 2 ON, 500 mV/div, OFFSET = 2 V, DC coupled, 1 M
Ω
input, connect to the ESA GATE/HI SWP OUT
connector or PSA TRIGGER 2 OUT connector on the
spectrum analyzer. Adjust channel 2 settings as
needed when gate is active.
Channel 3 ON, 500 mV/div, OFFSET = 0 V, DC coupled, 50
Ω
input, connect to the ESG RF OUTPUT pulsed-RF
signal. Adjust channel 3 settings as necessary.
Channel 4 OFF
Trigger Edge, channel 1, level = 1.5 V, or as needed