Weinschel 1806

The Weinschel 1806 is a dual Type IV power meter engineered for precision measurement of high-frequency and microwave power, as well as insertion loss characterization. It serves as a calibration standard for RF detectors, RF voltmeters, and thermistor mounts from TEGAM, Weinschel, and Agilent (HP). The instrument employs 100% DC substituted power methodology, eliminating AC component errors inherent to bolometer elements with short-term time constants. This approach delivers measurements directly traceable to primary voltage and resistance standards.

– Technical Specifications

• Power Measurement Range: 0.01 mW to 30 mW (DC substituted power)
• Measurement Accuracy: ±0.003% for substituted DC power levels
• DC Substitution Method: 100% DC substitution eliminates AC component measurement errors
• Operating Resistance: Selectable 100 ohm or 200 ohm mounts via front panel switch
• Internal Voltage Reference Generator: Enables high-precision measurements with low-resolution external voltmeters
• Power Supply Capability: Biases 100 or 200 ohm mounts
• Indicators: Individual fault LED per power meter, illuminates when loop balance conditions are violated

– Key Features

• Dual independent power meters for simultaneous measurements
• Binding post connections for direct thermistor mount attachment
• External DVM input terminals for integration with laboratory instrumentation
• Dedicated positive and negative bolometer terminals
• Separate heater control terminals for temperature-controlled mount operation
• Built-in temperature controllers for TEGAM and Weinschel temperature-controlled thermistor mounts
• EIA RS-310 and MIL-STD-189 compliant rack mounting with optional adapter kit (P/N 138-606)

– Typical Applications

• RF detector and RF voltmeter calibration
• Thermistor mount characterization and standards establishment
• Insertion loss measurements in RF and microwave circuits
• Precision power measurement traceable to SI standards

– Compatibility & Integration

The 1806 accommodates Agilent (HP) thermistor mounts models 478A, 486A, and 8478A when used with cable P/N 138-652. It integrates with TEGAM RF Power Transfer Standards and TEGAM/Weinschel temperature-controlled thermistor mounts. External DVM connection enables flexible measurement workflows within existing laboratory setups.