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Making Time-Gated Measurements
8 Making Time-Gated Measurements
Traditional frequency-domain spectrum analysis provides only limited information
for certain signals. Examples of these difficult-to-analyze signal include the
following:
• Pulsed-RF
• Time multiplexed
• Interleaved or intermittent
• Time domain multiple access (TDMA) radio formats
• Modulated burst
The time gating measurement examples use a simple frequency-modulated,
pulsed-RF signal. The goal is to eliminate the pulse spectrum and then view the
spectrum of the FM carrier as if it were continually on, rather than pulsed. This
reveals low-level modulation components that are hidden by the pulse spectrum.
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