The HP 85081A Service Guide Manual is essential technical documentation for maintaining and servicing the HP 8508A Vector Voltmeter and HP 70138A MMS Vector Voltmeter Module. This manual delivers detailed schematics, comprehensive parts lists, and step-by-step repair procedures enabling efficient diagnostics and resolution of technical faults. Designed exclusively for field engineers and service technicians, it covers installation, testing, adjustment, and full servicing protocols.
– Technical Specifications
• Frequency Range: 100 kHz to 1 GHz
• Measurement Levels: 10 µV to 1 V
• Temperature Operating Range: 0 to 55 °C
• System Impedance: 50-ohm configuration (frequency autoranging off)
• Probe Configuration: Measurements typically conducted with probes installed in HP 11536A Feedthru Tee
– Key Features
• High-impedance input probe module architecture
• Detailed schematics and component-level documentation
• Parts ordering guidance with HP part number cross-reference
• Installation and adjustment procedures
• Troubleshooting and diagnostic methodologies
• Direct mail order support (USA) through HP Parts Centre, Roseville, California
• No minimum order requirement for mail orders with check or money order payment
– Typical Applications
In-circuit vector measurements across RF and microwave frequency bands. Precision voltage measurements in 50-ohm test systems where high impedance probe insertion is required.
– Compatibility & Integration
• Primary Platform: HP 8508A Vector Voltmeter mainframe
• Secondary Platform: HP 70138A MMS Vector Voltmeter Module
• Input Probe Type: High-impedance design for in-circuit measurement
• Alternative Module: HP 85082 50-ohm Input Module available as substitute input configuration for HP 8508A mainframe
Manual includes ordering instructions for parts by HP part number and provides serial number tracking for supplement documentation access.
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