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 Amateur Radio Frequency Measurements:

 

 0-500MHZ LCD Power Meter with Data Logger

 

END OF PROJECT

Please consider PM5 Graphic RF Meter

PM3A RS232 in a powder coated metal case:

Click to enlarge 

 

After success of PM2 & PM3 LCD RF Power Meter Kits, with hundreds of users globally, I wanted to implement small & big changes opted by the radio amateurs.

Following added to PM3A RS232:

1.   LCD now mounts on CPU Board or may be Remote

2.   Encoder or Push Button Key Boards  

3.   Sensor Board is now remote

4.   Support for AD8307 SMT (SMT Sensor Board)

5.   Data output at RS232 Levels by using a MAX232.  

6.   Precession 2.5V reference added.

7.   SMT support for AD8307 by way of providing a a      specially designed Sensor PCB supporting AD8307 SOIC 8. (Not part of present kit)

8.  LCD Back-Light may now be turned off to save power.  

Following remain same as good old PM3:

1. Data Logger output supported by OZ8JYL Windows Software and G4HFQ Polar Plot Software

2.   Basic Schematic is almost same with change in labels and addition of few RFCs & Capacitors.

3.  FRC 16 pin connector for CPU Board and R/A 16FRC supplied for remote LCD mounting. A Female-to-Female, 30cm long, 16-wire ribbon cable is supplied for remote LCD mounting.

4.  DIP Switches for changing LCD Back Light Forward/Reverse Polarity.

5.  Works well with G4HFQ "Polar Plot" Software

A 40db Attenuator for this RF Meter will be available soon

Calibration Guide by K7SFN

Now all kits & assembled are supplied with a Free Powder coated metal case for PM3A & Sensor board. 

 


 
Completed PM3 RS232 LCD RF Power Meter:

Click the image to enlarge


 

RF Meter/Data Logger: LCD & Cables Removed

Click the image to enlarge


Keyboard Options:

Click the image to enlarge


Standard AD8307 DIP8 Sensor Board:

Click the image to enlarge

PM3A & Sensor Board in Metal Case: Cover Removed


Remote LCD with FRC Connectors/Ribbon Cable:


 

Main Screen of the 2X20 LCD RF Meter:
 
Menu & Selection Window:
  
DC Volt Meter Display:
PM3A RS232 Schematics, Details & Parts List:
 
  
PM3A RS232 RF Meter Doc. 0-500MHZ RF Sensor Document
 
PM3A RS232 Schematic & Parts List 0-500MHZ RF Sensor Document
  
PM2/3/3A Menu Config. Doc. 0-500MHZ RF Sensor Document
 
PM3A RS232 Kit Parts List 0-500MHZ RF Sensor Document
 
PM3A Menu Config for V1.03 by K7SFN 0-500MHZ RF Sensor Document
 
Windows Data Logger Program Download Analog Device AD8307 Datasheet
 
G4HFQ Polar Plot Download page Analog Device AD8307 Datasheet
  
PM3A RS232 RF Meter CPU Schematic JPG
 
PM3A RS232 AD8307 Dual Channel Sensor Board Schematic

JPG

 
PM3A RS232 AD8307 Sensor Board (SMT): 

JPG

  
Download HEX for 16F876A: V1.03 & 1.04

Analog Device AD8307 Datasheet

 
Download HEX for 16F876A: V1.04 M1CNK

Analog Device AD8307 Datasheet

 
FW V1.04 CONFIG

0-500MHZ RF Sensor Document

  
Project Datasheet 

Analog Device AD8307 Datasheet

PM3A PCB SILK ERROR

0-500MHZ RF Sensor Document

 

End of Project 

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