Tektronix CSA7404B Communications Signal Analyzer, 4 GHz, 4 Ch, 20 GS/s

The Tektronix CSA7404B Communications Signal Analyzer delivers signal characterization across 4 GHz bandwidth with four independent acquisition channels operating at 20 GS/s. This instrument provides the acquisition speed, vertical resolution, and measurement depth required for complex communication signal analysis, protocol decoding, and signal integrity validation in modern communication system development.

Technical Specifications

• Bandwidth: 4 GHz


• Channels: 4 independent inputs


• Sample Rate: 20 GS/s per channel (interleaved mode)


• Vertical Resolution: 10 bits


• Record Length: Up to 250,000 points per channel


• Input Impedance: 50 Ω ± 2%


• Input Coupling: DC, AC, GND


• Vertical Sensitivity: 1 mV/div to 10 V/div


• Offset Range: ±5 V (10–50 mV/div), ±50 V (100 mV/div to 1 V/div), ±500 V (2–10 V/div)


• Bandwidth Limit: Selectable 20 MHz to 4 GHz in 1 MHz increments Trigger System


• Modes: Auto, Normal, Single


• Sources: CH1, CH2, CH3, CH4, Ext, Line


• Holdoff: 200 ns to 10 s


• Advanced Trigger Types: Edge, Pulse Width, Glitch, Runt, Logic, Setup/Hold, Video Power


• Input: 100–240 VAC ±10%, 50/60 Hz


• Consumption: < 400 VA typical Physical


• Dimensions: 445 × 191 × 500 mm (W × H × D)


• Weight: 18.1 kg

Key Features

• Measurement functions: Amplitude, Rise/Fall Time, Pulse Width, Duty Cycle, RMS, Frequency, Period, Noise, Jitter, Eye Diagrams


• Signal integrity analysis for reflections, crosstalk, and channel loss characterization


• Jitter decomposition and automated eye diagram measurements


• Protocol decoder support for I²C, SPI, and parallel bus standards


• Advanced math: FFT, Integration, Differentiation, Averaging, Filter functions

Interfaces & Integration

• Front Panel: 4 × BNC inputs (channels), 1 × BNC external trigger, USB ports


• Rear Panel: Ethernet, GPIB, VGA output, Auxiliary I/O for synchronization

Typical Applications Signal characterization in high-speed serial communications, protocol validation, jitter and timing analysis, signal integrity measurements, and multi-channel signal correlation.