The Polar CITS500s is a Time Domain Reflectometry (TDR) based impedance measurement system engineered for PCB production environments. It delivers precise characteristic impedance analysis of single-ended and differential traces, ensuring compliance with critical signal integrity specifications. The system combines automated software control with simple operator interfaces—mouse, footswitch, or barcode reader—enabling repeatable results across design validation, quality control, and failure analysis workflows.
Technical Specifications
Measurement Performance
• Impedance range: 0 to 150 Ω
• Accuracy: 1% at 50 Ω
• Factory calibrated at 28 Ω, 50 Ω, 75 Ω, and 100 Ω against precision reference airlines traceable to National Standards
• Vertical resolution: 0.03 Ω
• Horizontal resolution: 0.2 mm (0.008 inches)
• Maximum testable length: 15 meters
• Reflected pulse rise time: 200 ps
• System bandwidth: 1.75 GHz
• Pulse amplitude: 50 Ω (± 2%)
Calibration & Measurement
Ratiometric calibration to internal 50 Ω reference. Propagation velocity and loss compensation parameters user-configurable. Measures single-ended trace impedance and differential impedance of balanced trace pairs.
– Key Features
• Two independent test probe channels (CITS500s model)
• RS232C computer interface for software control
• Opto-isolated, open-collector pass/fail outputs
• Footswitch activation support
• Barcode reader compatibility (PC keyboard wedge interface)
– Electrical & Physical
Power
• Input: 115 V ± 10%, 230 V ± 10%, or 100 V ± 10% at 50/60 Hz
• Consumption: 20 VA
• IEC inlet with protective grounding conductor required
Dimensions & Weight
• 443 mm (17.44 in.) wide × 114 mm (4.48 in.) high × 280 mm (11.02 in.) deep
• Weight: 5.0 kg
– Typical Applications
Design validation of high-speed digital and analog circuits. Production quality assurance of controlled impedance PCB traces. Root cause analysis of signal integrity failures.
