175 - Decimal, Binary, Octal, and Hex

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Today we talk about several different numbering schemes.  Two of which we find in the scanner radio environment.

What You Need To Know

• Decimal system can be thought of as human-readable digits. 
• These are easy to use to read and compute. 
• They are also easy to convert from one form to another. 
• While decimal works well with humans, it is not the case with computers. 
• Binary language is used for them. It has two bits 0 and 1.
• Octal is a 8 bit system. This is how we save a little bit of room in a system. 
• 0-7 make up 8 bits. 
• Hexadecimal (Hex) is a 16 base system with values from 0 – F. 
• There are no numerical symbols that represent values greater than nine, so letters taken from the English alphabet are used, Hexadecimal A = decimal 10, and F = decimal 15.
• I stick to decimal format when I program talk groups into my scanners. 
• When you look at Radio Reference, Trunk SysIDs and WACN are in Hex.
• RFSS and Site ID’s are shown in Decimal with Hex in parenthesis.
• Talk groups on Radio Reference have a column for Dec and a column for Hex.

 

All session notes with links to the items we talked about can be found on our website at www.scannerschool.com/session175

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