Sanjian Studio PLJ-8LED-C User Manual

PLJ-8LED Frequency Counter User Operating Manual 2
CONTENTS
Contents ................................................................................................................................................... 2
Overview................................................................................................................................................... 2
Technical Specifications ............................................................................................................................ 3
Operation and Use ................................................................................................................................... 5
Product Ordering ...................................................................................................................................... 9
FAQ ......................................................................................................................................................... 10
About DIY ................................................................................................................................................ 11
Appendix : Testing and Modifications .................................................................................................... 12
OVERVIEW
The PLJ-8LED-C module is a cost-effective 8-digit frequency counter and display module primarily to
display the operating frequency in a transceiver and other equipment. It may also be used for
conventional frequency measurement. The module offers compact, reliable high performance with
clear display at low cost.
The main features include:
 Microchip PIC16F648A forms the core of the 2.4GHz frequency meter.
 Frequency reference using a temperature-compensated voltage controlled crystal oscillator
(2.5 ppm VC-TCXO).
 Unique gate control with precise time algorithm (No timer interrupt).
 Gate (display refresh) times include 0.01, 0.1 and 1.0 seconds to allow a real-time frequency
display.
 Single connector input design supports three frequency measurement modes (Low channel /
High channel / Auto mode).
 Dual mode IF modes allow the offset value and the IF up / down mode to be separately
preset.
 Eight 0.56 inch high brightness LED digits with adjustable brightness.
 Automatic leading zero blanking, invalid display filter frequency selectable, optional last bit
blanking.
 Elegant circuit design supports two-button control for simple operation.
 Settings are saved automatically and directly recalled at power-up.

Sanjian Studio PLJ-8LED-C Specifications

General

Brand	Sanjian Studio
Model	PLJ-8LED-C
Category	Control Unit
Language	English