HP 8481A/8482A/8483A Power Sensor Operating and Service Manual

Operating and service manual for HP 8481A, 8482A and 8483A power sensors, including parts, troubleshooting and repair procedures.

Brand: HP
Category: power system
Document type: Service Manual
Language: English
Pages: 19
File format: PDF
File size: 833 KB
Published: 03 October, 2026
Updated: 03 October, 2026
MD5 checksum: 55B5E35BAD6116F5B51ACE98304A69D7
PDF: HP 8481A/8482A/8483A Power Sensor Operating and Service Manual PDF

About this manual

This manual provides service information for the HP 8481A, 8482A and 8483A Power Sensors. It covers principles of operation, recommended test equipment, and detailed wiring and load specifications. The document also lists replaceable parts with Hewlett‑Packard part numbers and ordering instructions.

Detailed procedures for disassembly, troubleshooting, bulkhead replacement, and re‑assembly are included, along with cautions for handling the delicate gold wires and RF connector beads. Calibration and repair strategies are described for technicians who need to restore sensor performance.

What's inside

Replaceable Parts
Principles of Operation
Troubleshooting
Repair Strategy
Bulkhead Replacement
Bulkhead Repair
Disassembly Procedure
Reassembly Procedure
Caution and Safety Notes

Specifications

Load impedance (HP 8481A/8482A)	50 Ω
Load impedance (HP 8483A)	75 Ω
Gold‑wire resistance (HP 8482A)	245 ± 12.5 Ω
Gold‑wire resistance (HP 8483A)	375 ± 17.5 Ω
Operational amplifier gain	≈ 700
Sampling square‑wave frequency	220 Hz

Frequently asked questions

What load impedance should be used with the HP 8481A and 8482A sensors?

The sensors require a 50 Ω load provided by the bulkhead assembly.

What is the recommended sampling frequency for the input amplifier?

The sampling frequency is a 220 Hz square wave supplied by the power meter.

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