This allows the spectrum of burst signals, such as those from GSM, IS-136, PDC or partial rate CDMA mobile stations, to be easily captured and examined. Real-time spectrum analyzers take a very different approach compared to traditional sweeping spectrum analyzers. Rather than acquiring one frequency step at a time, the real-time instrument captures a block of frequencies all at once. TFT display allows easy viewing of spectrum, waterfall displays, spectrograms and digital modulation analysis screens. Constellation and vector diagrams can be displayed, as well as frequency, phase, magnitude, I and Q versus time, for in-depth analysis of digitally modulated signals.
Users can move a marker through the time record and analyze the modulation at any point.
This facilitates analysis of W-CDMA signals with chip rates up to 16.384 Mcps. In addition, a frequency mask trigger allows capture of randomly occurring or infrequent signals such as intermittent spurious emissions. This is a major benefit when the trigger condition is used to capture signals arising from intermittent spurious or spectral re-growth events. Option 1S, automatic waveform recording, can be used to store multiple memory blocks to the internal hard drive without operator intervention. This enables unattended monitoring and recording of transient events for later review.