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seems. Select a size code for a block, and then press Scan. Now listen to the
communications. If you decide you are receiving most of the replies to the
conversations with ID’s assigned to the block you just programmed, then you’ve
probably selected the right size code and can work on the next block of the map.
Finally, for most public safety systems there are some size codes which are more
common. S-3 and S-4 are probably the most common, followed by S-10, S-11, and
S-12.
Size Code Restrictions
If you select size code S-12, S-13, or S-14, there are some restrictions as to which
blocks can be used for these codes.
• S-12 can only be assigned to Blocks 0, 2, 4, or 6.
• S-13 can only be assigned to Blocks 0 and 4.
• S-14 can only be assigned to Block 0.
Since these size codes require multiple blocks, you will be prompted for the next
available block when programming a fleet map. For example, if you assign Block 0
as an S-12, you will be prompted for b2, the next block available, instead of b1.
And if you assign Block 0 as an S-14, you would not see another prompt because
it uses all available blocks.