Hp-8478b-operating SERVICE – Service manual (PDF)

The HP Model 8478B Coaxial Thermistor Mount is designed for use with HP Model 431 and 432 Power Meters to measure microwave power from 1 μW to 10 mW, and it includes features to minimize environmental temperature effects and ensure accurate measurements. The manual provides detailed instructions for setup, operation, and troubleshooting, including precautions against mechanical shock and guidelines for connecting the mount to different power meters using appropriate adapters.

Brand: Hp-8478b-operating
Model: SERVICE
Type: service manual
File size: 1.1 MB

Contents hide

1 Overview

2 Specifications

3 Controls & Indicators

4 Installation / Setup

5 Operation

6 Troubleshooting & Error Codes

7 Safety & Warnings

8 Overview

9 Specifications

10 Controls & Indicators

11 Installation / Setup

12 Operation

13 Troubleshooting & Error Codes

14 Safety & Warnings

15 Downloads

16 More manuals from HP

Overview

The HP Model 8478B Coaxial Thermistor Mount is designed for use with HP Model 431 and 432 Power Meters to measure microwave power from 1 µW to 10 mW. It minimizes adverse effects from environmental temperature changes during measurement and is used over the 10 MHz to 18 GHz frequency range. The mount terminates the coaxial input in a 50-ohm impedance and has a SWR of not more than 1.75 without external tuning. Each mount contains thermistors matched to cancel drift effects with ambient temperature change, ensuring thermal stability. The 8478B operates directly with 431C and 432 Power Meters and requires adapters for use with 431A/B or 430 Power Meters. Specifications include frequency range, uncertainty of calibration factor data, and input impedance.