Trio PF-810 User Manual

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FUNCTIONPOWERMETER
PF-810
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OPERATING INSTRUCTIONS
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Trio PF-810 Specifications

General

Type	Frequency Counter
Display	8-digit LED
Operating Temperature	0°C to 50°C
Power Source	AC 100-240V, 50/60 Hz
Resolution	1 Hz
Operating Humidity	80% RH or less
Power Supply	AC 100-240V, 50/60 Hz

Summary

Key Features of the PF-810

Troidal Core Directional Coupler

Radiant Power (RAD) Indicator

Principles of Operation

Directional Coupler Function

Picks up forward and reflection wave components from coaxial cable using toroidal core transformers.

Voltage Converter for Linear Readings

Operating Parts and Controls

Front Panel Controls Overview

Details the meter, power range selector, function switch, and SWR calibrator.

Function Switch Settings

Explains the 6 positions (OFF, FWD, REF, RAD, CAL, SWR) of the function switch.

Power Range Selector

Antenna Selector Operation

Cautions for Use

Operational Procedures

Measurement of SWR

Step-by-step guide for measuring SWR, including calibration steps.

Measurement of Forward Power (FWD)

Procedure to measure forward power by setting function switch to FWD and adjusting range.

Measurement of Refrection Power (REF)

Procedure to measure refrection power by setting function switch to REF.

SWR Calculation from Power Readings

Measurement of Radiant Power (RAD)

Schematic Diagram