The Phase Matrix / EIP 1231A is a VXIbus-based microwave frequency counter engineered for pulsed and continuous wave signal measurement up to 20 GHz. It delivers precise frequency profiling, pulse parameter analysis, and multi-signal characterization in R&D, production, and maintenance environments. Built on proven Phase Matrix 585/588 series architecture, the 1231A combines an internal oven-controlled crystal oscillator timebase with YIG-preselected microwave input stages, delivering exceptional selectivity and burnout protection across demanding measurement scenarios.
Technical Specifications
• Frequency Range: 10 MHz to 20 GHz
• Frequency Resolution: 0.01 Hz
• Frequency Accuracy: ±1 Hz
• Input Sensitivity: −20 dBm to +20 dBm
• Input Impedance: 50 Ohms
• Burnout Protection: 200 Watts peak (+53 dBm)
• Timebase: Internal OCXO with ±1 × 10⁻⁸ per day stability
• Timebase Aging Rate: <1 × 10⁻⁷/month
• Short-Term Stability: <1 × 10⁻⁹ RMS (1 s average)
• Temperature Stability: <1 × 10⁻⁶ (0° to 50°C)
• Pulse Width Measurement Resolution: 10 ns
• Pulse Period Measurement Resolution: 10 ns
• Minimum Pulse Width: 50 ns
• Minimum PRF: 1 Hz
– Key Features
• YIG-preselected input provides unparalleled frequency selectivity and amplitude discrimination
• Simultaneous frequency and power measurement of individual signals in multi-signal environments
• External gating via inhibit input or VXIbus ECL trigger lines enables time-domain signal profiling
• Measurement windows as narrow as 15 ns can be positioned within RF pulses for frequency-versus-time characterization
• Supports frequency profiling of VCOs, chirped radar, and pulse-modulated signals
• Field-proven MTBF exceeding 40,000 hours
– Typical Applications
• Pulse radar and frequency-agile signal characterization
• VCO and voltage-controlled frequency source validation
• Time-domain frequency profiling of complex modulated signals
• Multi-signal environments requiring simultaneous frequency and power measurement
– Compatibility & Integration
VXIbus integration enables modular system configuration. External timing inputs support synchronized measurement with external pulse generators and trigger systems.
