The Tektronix PSM3320 is a USB power sensor that delivers accurate RF and microwave power measurements across 10 MHz to 18 GHz without requiring a separate mainframe. This compact, portable sensor connects directly to a PC via USB 2.0, drawing power from the host connection and eliminating external power supply requirements.
The PSM3320 performs true average power measurements independent of signal modulation and bandwidth, making it suitable for both CW and pulse modulation analysis. Its equivalent time-sampling technique enables effective sample rates up to 48 MS/s for repetitive pulsed signals with video bandwidths to 10 MHz. Time-domain pulse characterization includes rise/fall time, overshoot, and droop measurements. The sensor delivers measurement speeds of up to 2000 readings per second, reducing test cycle times significantly.
Technical Specifications
• Frequency Range: 10 MHz to 18 GHz
• Power Range: −55 dBm to +20 dBm
• Measurement Speed: Up to 2000 readings per second
• Effective Sample Rate: Up to 48 MS/s (repetitive pulses, video bandwidth to 10 MHz)
• Calibration Factor Uncertainty:
– 10 MHz to 1 GHz: 1.8%
– 1 GHz to 10 GHz: 1.7%
– 10 GHz to 18 GHz: 1.9%
• Total Measurement Uncertainty: As low as 2.6%
• Connector: N-Type Male
• Interface: USB 2.0 with TTL Trigger Input/Output
• Dimensions: 1.6 in. (40 mm) diameter × 2.25 in. (57 mm) length plus connector
– Key Features
• Factory calibration over full operating temperature range eliminates zero and calibration procedures
• Duty cycle corrected pulse power measurements
• Pass/Fail limit modes for automated testing
• Measurement logging and data recording capabilities
• Windows-based Power Meter application software included
• LabVIEW and API control with documented example programs
• Single-sensor or multi-sensor operation (up to 12 sensors via communications library without external switches)
– Typical Applications
• Time-domain analysis of constant-envelope, repetitive pulsed signals
• Pulse characterization and modulation measurements
• Production and field testing of RF/microwave components
• Automated test equipment (ATE) integration via TTL triggers
– Compatibility & Integration
The PSM3320 integrates with custom test systems through LabVIEW, documented API calls, and provided example code. TTL trigger inputs and outputs support ATE synchronization. The communications library enables multi-sensor configurations without costly external switching infrastructure.
